diff --git a/app/Exceptions/Handler.php b/app/Exceptions/Handler.php
index e49cc180fc..57cc00af8f 100644
--- a/app/Exceptions/Handler.php
+++ b/app/Exceptions/Handler.php
@@ -36,6 +36,7 @@ use Illuminate\Session\TokenMismatchException;
 use Illuminate\Support\Arr;
 use Illuminate\Validation\ValidationException as LaravelValidationException;
 use Laravel\Passport\Exceptions\OAuthServerException as LaravelOAuthException;
+use LaravelJsonApi\Core\Exceptions\JsonApiException;
 use League\OAuth2\Server\Exception\OAuthServerException;
 use Symfony\Component\HttpFoundation\Exception\SuspiciousOperationException;
 use Symfony\Component\HttpFoundation\Response;
@@ -63,6 +64,7 @@ class Handler extends ExceptionHandler
             HttpException::class,
             SuspiciousOperationException::class,
             BadHttpHeaderException::class,
+            JsonApiException::class,
         ];
 
     /**
diff --git a/app/JsonApi/V3/Accounts/AccountRepository.php b/app/JsonApi/V3/Accounts/AccountRepository.php
new file mode 100644
index 0000000000..02c7d4b1f8
--- /dev/null
+++ b/app/JsonApi/V3/Accounts/AccountRepository.php
@@ -0,0 +1,59 @@
+<?php
+/*
+ * AccountRepository.php
+ * Copyright (c) 2024 james@firefly-iii.org.
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see https://www.gnu.org/licenses/.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\JsonApi\V3\Accounts;
+
+use FireflyIII\Models\Account;
+use FireflyIII\Support\JsonApi\Concerns\UsergroupAware;
+use LaravelJsonApi\Contracts\Store\QueriesAll;
+use LaravelJsonApi\NonEloquent\AbstractRepository;
+
+
+class AccountRepository extends AbstractRepository implements QueriesAll
+{
+    use UsergroupAware;
+
+    /**
+     * SiteRepository constructor.
+     *
+     */
+    public function __construct() {}
+
+    /**
+     * @inheritDoc
+     */
+    public function find(string $resourceId): ?object
+    {
+
+        return Account::find((int) $resourceId);
+    }
+
+    public function queryAll(): Capabilities\AccountQuery
+    {
+        return Capabilities\AccountQuery::make()
+                                        ->withUserGroup($this->userGroup)
+                                        ->withServer($this->server)
+                                        ->withSchema($this->schema);
+    }
+
+}
diff --git a/app/JsonApi/V3/Accounts/AccountResource.php b/app/JsonApi/V3/Accounts/AccountResource.php
new file mode 100644
index 0000000000..fa824c7b93
--- /dev/null
+++ b/app/JsonApi/V3/Accounts/AccountResource.php
@@ -0,0 +1,160 @@
+<?php
+/*
+ * AccountResource.php
+ * Copyright (c) 2024 james@firefly-iii.org.
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see https://www.gnu.org/licenses/.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\JsonApi\V3\Accounts;
+
+use Illuminate\Http\Request;
+use LaravelJsonApi\Core\Resources\JsonApiResource;
+
+class AccountResource extends JsonApiResource
+{
+
+    /**
+     * Get the resource id.
+     *
+     * @return string
+     */
+    public function id(): string
+    {
+        return (string) $this->resource->id;
+    }
+
+    /**
+     * Get the resource's attributes.
+     *
+     * @param Request|null $request
+     *
+     * @return iterable
+     */
+    public function attributes($request): iterable
+    {
+        return [
+            'created_at'      => $this->resource->created_at,
+            'updated_at'      => $this->resource->updated_at,
+            'name'            => $this->resource->name,
+            'iban'            => '' === $this->resource->iban ? null : $this->resource->iban,
+            'active'          => $this->resource->active,
+            'virtual_balance' => $this->resource->virtual_balance,
+            'last_activity'   => $this->resource->last_activity,
+            'balance'         => $this->resource->balance,
+            'native_balance'  => $this->resource->native_balance,
+            'type'            => $this->resource->name,
+
+            //            'type'                    => strtolower($accountType),
+            //            'account_role'            => $accountRole,
+            //            'currency_id'             => $currencyId,
+            //            'currency_code'           => $currencyCode,
+            //            'currency_symbol'         => $currencySymbol,
+            //            'currency_decimal_places' => $decimalPlaces,
+            //            'current_balance'         => app('steam')->bcround(app('steam')->balance($account, $date), $decimalPlaces),
+            //            'current_balance_date'    => $date->toAtomString(),
+            //            'notes'                   => $this->repository->getNoteText($account),
+            //            'monthly_payment_date'    => $monthlyPaymentDate,
+            //            'credit_card_type'        => $creditCardType,
+            //            'account_number'          => $this->repository->getMetaValue($account, 'account_number'),
+            //            'bic'                     => $this->repository->getMetaValue($account, 'BIC'),
+            //            'opening_balance'         => $openingBalance,
+            //            'opening_balance_date'    => $openingBalanceDate,
+            //            'liability_type'          => $liabilityType,
+            //            'liability_direction'     => $liabilityDirection,
+            //            'interest'                => $interest,
+            //            'interest_period'         => $interestPeriod,
+            //            'current_debt'            => $this->repository->getMetaValue($account, 'current_debt'),
+            //            'include_net_worth'       => $includeNetWorth,
+            //            'longitude'               => $longitude,
+            //            'latitude'                => $latitude,
+            //            'zoom_level'              => $zoomLevel,
+            //             'id'                             => (string) $account->id,
+            //            'created_at'                     => $account->created_at->toAtomString(),
+            //            'updated_at'                     => $account->updated_at->toAtomString(),
+            //            'active'                         => $account->active,
+            //            'order'                          => $order,
+            //            'name'                           => $account->name,
+            //            'iban'                           => '' === (string) $account->iban ? null : $account->iban,
+            //            'account_number'                 => $this->accountMeta[$id]['account_number'] ?? null,
+            //            'type'                           => strtolower($accountType),
+            //            'account_role'                   => $accountRole,
+            //            'currency_id'                    => (string) $currency->id,
+            //            'currency_code'                  => $currency->code,
+            //            'currency_symbol'                => $currency->symbol,
+            //            'currency_decimal_places'        => $currency->decimal_places,
+            //
+            //            'native_currency_id'             => (string) $this->default->id,
+            //            'native_currency_code'           => $this->default->code,
+            //            'native_currency_symbol'         => $this->default->symbol,
+            //            'native_currency_decimal_places' => $this->default->decimal_places,
+            //
+            //            // balance:
+            //            'current_balance'                => $balance,
+            //            'native_current_balance'         => $nativeBalance,
+            //            'current_balance_date'           => $this->getDate()->endOfDay()->toAtomString(),
+            //
+            //            // balance difference
+            //            'balance_difference'             => $balanceDiff,
+            //            'native_balance_difference'      => $nativeBalanceDiff,
+            //            'balance_difference_start'       => $diffStart,
+            //            'balance_difference_end'         => $diffEnd,
+            //
+            //            // more meta
+            //            'last_activity'                  => array_key_exists($id, $this->lastActivity) ? $this->lastActivity[$id]->toAtomString() : null,
+            //
+            //            // liability stuff
+            //            'liability_type'                 => $liabilityType,
+            //            'liability_direction'            => $liabilityDirection,
+            //            'interest'                       => $interest,
+            //            'interest_period'                => $interestPeriod,
+            //            'current_debt'                   => $currentDebt,
+            //
+            //            // object group
+            //            'object_group_id'                => null !== $objectGroupId ? (string) $objectGroupId : null,
+            //            'object_group_order'             => $objectGroupOrder,
+            //            'object_group_title'             => $objectGroupTitle,
+            //            'notes'                   => $this->repository->getNoteText($account),
+            //            'monthly_payment_date'    => $monthlyPaymentDate,
+            //            'credit_card_type'        => $creditCardType,
+            //            'bic'                     => $this->repository->getMetaValue($account, 'BIC'),
+            //            'virtual_balance'         => number_format((float) $account->virtual_balance, $decimalPlaces, '.', ''),
+            //            'opening_balance'         => $openingBalance,
+            //            'opening_balance_date'    => $openingBalanceDate,
+            //            'include_net_worth'       => $includeNetWorth,
+            //            'longitude'               => $longitude,
+            //            'latitude'                => $latitude,
+            //            'zoom_level'              => $zoomLevel,
+        ];
+    }
+
+    /**
+     * Get the resource's relationships.
+     *
+     * @param Request|null $request
+     *
+     * @return iterable
+     */
+    public function relationships($request): iterable
+    {
+        return [
+            $this->relation('user')->withData($this->resource->user),
+            //$this->relation('tags')->withData($this->resource->getTags()),
+        ];
+    }
+}
diff --git a/app/JsonApi/V3/Accounts/AccountSchema.php b/app/JsonApi/V3/Accounts/AccountSchema.php
new file mode 100644
index 0000000000..61ac9c8e35
--- /dev/null
+++ b/app/JsonApi/V3/Accounts/AccountSchema.php
@@ -0,0 +1,190 @@
+<?php
+/*
+ * AccountSchema.php
+ * Copyright (c) 2024 james@firefly-iii.org.
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see https://www.gnu.org/licenses/.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\JsonApi\V3\Accounts;
+
+use FireflyIII\Enums\UserRoleEnum;
+use FireflyIII\Models\Account;
+use FireflyIII\Support\Http\Api\ValidatesUserGroupTrait;
+use LaravelJsonApi\Core\Schema\Schema;
+use LaravelJsonApi\Eloquent\Fields\DateTime;
+use LaravelJsonApi\NonEloquent\Fields\Attribute;
+use LaravelJsonApi\NonEloquent\Fields\ID;
+use LaravelJsonApi\NonEloquent\Fields\ToMany;
+use LaravelJsonApi\NonEloquent\Fields\ToOne;
+use LaravelJsonApi\NonEloquent\Filters\Filter;
+use LaravelJsonApi\NonEloquent\Pagination\EnumerablePagination;
+
+class AccountSchema extends Schema
+{
+    use ValidatesUserGroupTrait;
+    protected array                    $acceptedRoles = [UserRoleEnum::READ_ONLY, UserRoleEnum::MANAGE_TRANSACTIONS];
+
+    /**
+     * The model the schema corresponds to.
+     *
+     * @var string
+     */
+    public static string $model = Account::class;
+
+    /**
+     * @inheritDoc
+     */
+    public function fields(): iterable
+    {
+        return [
+            ID::make(),
+            DateTime::make('created_at')->sortable()->readOnly(),
+            DateTime::make('updated_at')->sortable()->readOnly(),
+            Attribute::make('name')->sortable(),
+            Attribute::make('iban'),
+            Attribute::make('active'),
+            Attribute::make('virtual_balance'),
+
+            Attribute::make('last_activity')->sortable(),
+            Attribute::make('balance')->sortable(),
+            Attribute::make('native_balance')->sortable(),
+            Attribute::make('type'),
+
+            // fancy fields:
+
+
+
+            //Attribute::make('current_balance')->sortable(),
+
+            //            'type'                    => strtolower($accountType),
+            //            'account_role'            => $accountRole,
+            //            'currency_id'             => $currencyId,
+            //            'currency_code'           => $currencyCode,
+            //            'currency_symbol'         => $currencySymbol,
+            //            'currency_decimal_places' => $decimalPlaces,
+            //            'current_balance'         => app('steam')->bcround(app('steam')->balance($account, $date), $decimalPlaces),
+            //            'current_balance_date'    => $date->toAtomString(),
+            //            'notes'                   => $this->repository->getNoteText($account),
+            //            'monthly_payment_date'    => $monthlyPaymentDate,
+            //            'credit_card_type'        => $creditCardType,
+            //            'account_number'          => $this->repository->getMetaValue($account, 'account_number'),
+            //            'bic'                     => $this->repository->getMetaValue($account, 'BIC'),
+            //            'opening_balance'         => $openingBalance,
+            //            'opening_balance_date'    => $openingBalanceDate,
+            //            'liability_type'          => $liabilityType,
+            //            'liability_direction'     => $liabilityDirection,
+            //            'interest'                => $interest,
+            //            'interest_period'         => $interestPeriod,
+            //            'current_debt'            => $this->repository->getMetaValue($account, 'current_debt'),
+            //            'include_net_worth'       => $includeNetWorth,
+            //            'longitude'               => $longitude,
+            //            'latitude'                => $latitude,
+            //            'zoom_level'              => $zoomLevel,
+            //             'id'                             => (string) $account->id,
+            //            'created_at'                     => $account->created_at->toAtomString(),
+            //            'updated_at'                     => $account->updated_at->toAtomString(),
+            //            'active'                         => $account->active,
+            //            'order'                          => $order,
+            //            'name'                           => $account->name,
+            //            'iban'                           => '' === (string) $account->iban ? null : $account->iban,
+            //            'account_number'                 => $this->accountMeta[$id]['account_number'] ?? null,
+            //            'type'                           => strtolower($accountType),
+            //            'account_role'                   => $accountRole,
+            //            'currency_id'                    => (string) $currency->id,
+            //            'currency_code'                  => $currency->code,
+            //            'currency_symbol'                => $currency->symbol,
+            //            'currency_decimal_places'        => $currency->decimal_places,
+            //
+            //            'native_currency_id'             => (string) $this->default->id,
+            //            'native_currency_code'           => $this->default->code,
+            //            'native_currency_symbol'         => $this->default->symbol,
+            //            'native_currency_decimal_places' => $this->default->decimal_places,
+            //
+            //            // balance:
+            //            'current_balance'                => $balance,
+            //            'native_current_balance'         => $nativeBalance,
+            //            'current_balance_date'           => $this->getDate()->endOfDay()->toAtomString(),
+            //
+            //            // balance difference
+            //            'balance_difference'             => $balanceDiff,
+            //            'native_balance_difference'      => $nativeBalanceDiff,
+            //            'balance_difference_start'       => $diffStart,
+            //            'balance_difference_end'         => $diffEnd,
+            //
+            //            // more meta
+            //            'last_activity'                  => array_key_exists($id, $this->lastActivity) ? $this->lastActivity[$id]->toAtomString() : null,
+            //
+            //            // liability stuff
+            //            'liability_type'                 => $liabilityType,
+            //            'liability_direction'            => $liabilityDirection,
+            //            'interest'                       => $interest,
+            //            'interest_period'                => $interestPeriod,
+            //            'current_debt'                   => $currentDebt,
+            //
+            //            // object group
+            //            'object_group_id'                => null !== $objectGroupId ? (string) $objectGroupId : null,
+            //            'object_group_order'             => $objectGroupOrder,
+            //            'object_group_title'             => $objectGroupTitle,
+            //            'notes'                   => $this->repository->getNoteText($account),
+            //            'monthly_payment_date'    => $monthlyPaymentDate,
+            //            'credit_card_type'        => $creditCardType,
+            //            'bic'                     => $this->repository->getMetaValue($account, 'BIC'),
+            //            'virtual_balance'         => number_format((float) $account->virtual_balance, $decimalPlaces, '.', ''),
+            //            'opening_balance'         => $openingBalance,
+            //            'opening_balance_date'    => $openingBalanceDate,
+            //            'include_net_worth'       => $includeNetWorth,
+            //            'longitude'               => $longitude,
+            //            'latitude'                => $latitude,
+            //            'zoom_level'              => $zoomLevel,
+
+            ToOne::make('user'),
+//            ToMany::make('tags'),
+        ];
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function pagination(): EnumerablePagination
+    {
+        return EnumerablePagination::make();
+    }
+
+
+    /**
+     * @inheritDoc
+     */
+    public function filters(): iterable
+    {
+        return [
+            Filter::make('name'),
+        ];
+    }
+    public function repository(): AccountRepository
+    {
+        $userGroup = $this->validateUserGroup(request());
+        return AccountRepository::make()
+            ->withUserGroup($userGroup)
+                             ->withServer($this->server)
+                             ->withSchema($this);
+    }
+
+
+
+}
diff --git a/app/JsonApi/V3/Accounts/Capabilities/AccountQuery.php b/app/JsonApi/V3/Accounts/Capabilities/AccountQuery.php
new file mode 100644
index 0000000000..7ef2de6b8a
--- /dev/null
+++ b/app/JsonApi/V3/Accounts/Capabilities/AccountQuery.php
@@ -0,0 +1,84 @@
+<?php
+/*
+ * AccountQuery.php
+ * Copyright (c) 2024 james@firefly-iii.org.
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see https://www.gnu.org/licenses/.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\JsonApi\V3\Accounts\Capabilities;
+
+use FireflyIII\Models\Account;
+use FireflyIII\Support\JsonApi\Concerns\UsergroupAware;
+use FireflyIII\Support\JsonApi\Enrichments\AccountEnrichment;
+use FireflyIII\Support\JsonApi\ExpandsQuery;
+use FireflyIII\Support\JsonApi\FiltersPagination;
+use FireflyIII\Support\JsonApi\SortsCollection;
+use FireflyIII\Support\JsonApi\ValidateSortParameters;
+use LaravelJsonApi\Contracts\Store\HasPagination;
+use LaravelJsonApi\NonEloquent\Capabilities\QueryAll;
+use LaravelJsonApi\NonEloquent\Concerns\PaginatesEnumerables;
+
+class AccountQuery extends QueryAll implements HasPagination
+{
+    use PaginatesEnumerables;
+    use FiltersPagination;
+    use ValidateSortParameters;
+    use UsergroupAware;
+    use ExpandsQuery;
+    use SortsCollection;
+
+    /**
+     * @inheritDoc
+     */
+    #[\Override] public function get(): iterable
+    {
+        $filters    = $this->queryParameters->filter();
+        $sort       = $this->queryParameters->sortFields();
+        $pagination = $this->filtersPagination($this->queryParameters->page());
+        $needsAll   = $this->validateParams('account', $sort);
+        $query      = $this->userGroup->accounts();
+
+        if (!$needsAll) {
+            $query = $this->addPagination($query, $pagination);
+        }
+        $query = $this->addSortParams($query, $sort);
+        $query = $this->addFilterParams('account', $query, $filters);
+
+        $collection = $query->get(['accounts.*']);
+
+        // enrich data
+        $enrichment = new AccountEnrichment();
+        $collection = $enrichment->enrich($collection);
+
+
+        // add filters after the query
+
+        // add sort after the query
+        $collection = $this->sortCollection($collection, $sort);
+
+
+        return $collection;
+
+//        var_dump($filters->value('name'));
+//        exit;
+
+
+        return Account::get();
+    }
+}
diff --git a/app/JsonApi/V3/Server.php b/app/JsonApi/V3/Server.php
new file mode 100644
index 0000000000..78a5beec6a
--- /dev/null
+++ b/app/JsonApi/V3/Server.php
@@ -0,0 +1,42 @@
+<?php
+
+namespace FireflyIII\JsonApi\V3;
+
+use FireflyIII\JsonApi\V3\Accounts\AccountSchema;
+use FireflyIII\JsonApi\V3\Users\UserSchema;
+use LaravelJsonApi\Core\Server\Server as BaseServer;
+
+class Server extends BaseServer
+{
+
+    /**
+     * The base URI namespace for this server.
+     *
+     * @var string
+     */
+    protected string $baseUri = '/api/v3';
+
+    /**
+     * Bootstrap the server when it is handling an HTTP request.
+     *
+     * @return void
+     */
+    public function serving(): void
+    {
+        // no-op
+    }
+
+    /**
+     * Get the server's list of schemas.
+     *
+     * @return array
+     */
+    protected function allSchemas(): array
+    {
+        return [
+            AccountSchema::class,
+            UserSchema::class,
+        ];
+    }
+
+}
diff --git a/app/JsonApi/V3/Users/UserSchema.php b/app/JsonApi/V3/Users/UserSchema.php
new file mode 100644
index 0000000000..81e18adc41
--- /dev/null
+++ b/app/JsonApi/V3/Users/UserSchema.php
@@ -0,0 +1,65 @@
+<?php
+
+namespace FireflyIII\JsonApi\V3\Users;
+
+use FireflyIII\User;
+use LaravelJsonApi\Eloquent\Contracts\Paginator;
+use LaravelJsonApi\Eloquent\Fields\DateTime;
+use LaravelJsonApi\Eloquent\Fields\ID;
+use LaravelJsonApi\Eloquent\Fields\Relations\HasMany;
+use LaravelJsonApi\Eloquent\Filters\WhereIdIn;
+use LaravelJsonApi\Eloquent\Pagination\PagePagination;
+use LaravelJsonApi\Eloquent\Schema;
+
+class UserSchema extends Schema
+{
+
+    /**
+     * The model the schema corresponds to.
+     *
+     * @var string
+     */
+    public static string $model = User::class;
+
+    /**
+     * Get the resource fields.
+     *
+     * @return array
+     */
+    public function fields(): array
+    {
+        return [
+            ID::make(),
+            DateTime::make('createdAt')->sortable()->readOnly(),
+            DateTime::make('updatedAt')->sortable()->readOnly(),
+            HasMany::make('accounts'),
+        ];
+    }
+
+    /**
+     * Get the resource filters.
+     *
+     * @return array
+     */
+    public function filters(): array
+    {
+        return [
+            WhereIdIn::make($this),
+        ];
+    }
+
+    /**
+     * Get the resource paginator.
+     *
+     * @return Paginator|null
+     */
+    public function pagination(): ?Paginator
+    {
+        return PagePagination::make();
+    }
+    public function authorizable(): bool
+    {
+        return false;
+    }
+
+}
diff --git a/app/Policies/AccountPolicy.php b/app/Policies/AccountPolicy.php
new file mode 100644
index 0000000000..c1ed85f04d
--- /dev/null
+++ b/app/Policies/AccountPolicy.php
@@ -0,0 +1,54 @@
+<?php
+/*
+ * AccountPolicy.php
+ * Copyright (c) 2024 james@firefly-iii.org.
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see https://www.gnu.org/licenses/.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Policies;
+
+use FireflyIII\Models\Account;
+use FireflyIII\User;
+
+class AccountPolicy
+{
+
+    /**
+     * TODO needs better authentication.
+     *
+     * @param User    $user
+     * @param Account $account
+     *
+     * @return bool
+     */
+    public function view(User $user, Account $account): bool
+    {
+        return auth()->check() && $user->id === $account->user_id;
+    }
+
+    /**
+     * Everybody can do this, but selection should limit to user.
+     *
+     * @return true
+     */
+    public function viewAny(): bool
+    {
+        return auth()->check();
+    }
+}
diff --git a/app/Policies/UserPolicy.php b/app/Policies/UserPolicy.php
new file mode 100644
index 0000000000..4c6cec2c65
--- /dev/null
+++ b/app/Policies/UserPolicy.php
@@ -0,0 +1,29 @@
+<?php
+/*
+ * UserPolicy.php
+ * Copyright (c) 2024 james@firefly-iii.org.
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see https://www.gnu.org/licenses/.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Policies;
+
+class UserPolicy
+{
+
+}
diff --git a/app/Support/JsonApi/Concerns/UsergroupAware.php b/app/Support/JsonApi/Concerns/UsergroupAware.php
new file mode 100644
index 0000000000..04369bf967
--- /dev/null
+++ b/app/Support/JsonApi/Concerns/UsergroupAware.php
@@ -0,0 +1,48 @@
+<?php
+/*
+ * UsergroupAware.php
+ * Copyright (c) 2024 james@firefly-iii.org.
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see https://www.gnu.org/licenses/.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Support\JsonApi\Concerns;
+
+use FireflyIII\Models\UserGroup;
+
+trait UsergroupAware
+{
+
+    protected UserGroup $userGroup;
+
+    public function getUserGroup(): UserGroup
+    {
+        return $this->userGroup;
+    }
+
+    public function setUserGroup(UserGroup $userGroup): void
+    {
+        $this->userGroup = $userGroup;
+    }
+
+    public function withUserGroup(UserGroup $userGroup): self {
+        $this->userGroup = $userGroup;
+        return $this;
+    }
+
+}
diff --git a/app/Support/JsonApi/Enrichments/AccountEnrichment.php b/app/Support/JsonApi/Enrichments/AccountEnrichment.php
new file mode 100644
index 0000000000..4f1343c6d9
--- /dev/null
+++ b/app/Support/JsonApi/Enrichments/AccountEnrichment.php
@@ -0,0 +1,79 @@
+<?php
+/*
+ * AccountEnricher.php
+ * Copyright (c) 2024 james@firefly-iii.org.
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see https://www.gnu.org/licenses/.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Support\JsonApi\Enrichments;
+
+use Carbon\Carbon;
+use FireflyIII\Exceptions\FireflyException;
+use FireflyIII\Repositories\UserGroups\Account\AccountRepositoryInterface;
+use Illuminate\Support\Collection;
+use Illuminate\Support\Facades\Log;
+
+class AccountEnrichment implements EnrichmentInterface
+{
+
+    private Collection $collection;
+
+    #[\Override] public function enrich(Collection $collection): Collection
+    {
+        $this->collection         = $collection;
+
+        // do everything here:
+        $this->getLastActivity();
+        $this->getMetaBalances();
+
+        return $this->collection;
+    }
+
+    /**
+     * TODO this method refers to a single-use method inside Steam that could be moved here.
+     * @return void
+     */
+    private function getLastActivity(): void
+    {
+        /** @var AccountRepositoryInterface $accountRepository */
+        $accountRepository = app(AccountRepositoryInterface::class);
+        $lastActivity      = $accountRepository->getLastActivity($this->collection);
+        foreach ($lastActivity as $row) {
+            $this->collection->where('id', $row['account_id'])->first()->last_activity = Carbon::parse($row['date_max'], config('app.timezone'));
+        }
+    }
+
+    /**
+     * TODO this method refers to a single-use method inside Steam that could be moved here.
+     * @return void
+     */
+    private function getMetaBalances(): void
+    {
+        try {
+            $array = app('steam')->balancesByAccountsConverted($this->collection, today());
+        } catch (FireflyException $e) {
+            Log::error(sprintf('Could not load balances: %s', $e->getMessage()));
+            return;
+        }
+        foreach ($array as $accountId => $row) {
+            $this->collection->where('id', $accountId)->first()->balance = $row['balance'];
+            $this->collection->where('id', $accountId)->first()->native_balance = $row['native_balance'];
+        }
+    }
+}
diff --git a/app/Support/JsonApi/Enrichments/EnrichmentInterface.php b/app/Support/JsonApi/Enrichments/EnrichmentInterface.php
new file mode 100644
index 0000000000..ecd409b8c5
--- /dev/null
+++ b/app/Support/JsonApi/Enrichments/EnrichmentInterface.php
@@ -0,0 +1,32 @@
+<?php
+/*
+ * EnricherInterface.php
+ * Copyright (c) 2024 james@firefly-iii.org.
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see https://www.gnu.org/licenses/.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Support\JsonApi\Enrichments;
+
+use Illuminate\Support\Collection;
+
+interface EnrichmentInterface
+{
+    public function enrich(Collection $collection): Collection;
+
+}
diff --git a/app/Support/JsonApi/ExpandsQuery.php b/app/Support/JsonApi/ExpandsQuery.php
new file mode 100644
index 0000000000..20902eb254
--- /dev/null
+++ b/app/Support/JsonApi/ExpandsQuery.php
@@ -0,0 +1,68 @@
+<?php
+/*
+ * ExpandsQuery.php
+ * Copyright (c) 2024 james@firefly-iii.org.
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see https://www.gnu.org/licenses/.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Support\JsonApi;
+
+use Illuminate\Contracts\Database\Eloquent\Builder;
+use LaravelJsonApi\Core\Query\FilterParameters;
+use LaravelJsonApi\Core\Query\SortFields;
+
+trait ExpandsQuery
+{
+    final protected function addPagination(Builder $query, array $pagination): Builder
+    {
+        $skip = ($pagination['number'] - 1) * $pagination['size'];
+        return $query->skip($skip)->take($pagination['size']);
+    }
+
+    final protected function addSortParams(Builder $query, SortFields $sort): Builder
+    {
+        foreach ($sort->all() as $sortField) {
+            $query->orderBy($sortField->name(), $sortField->isAscending() ? 'ASC' : 'DESC');
+        }
+        return $query;
+    }
+
+    final protected function addFilterParams(string $class, Builder $query, ?FilterParameters $filters): Builder
+    {
+        if (null === $filters) {
+            return $query;
+        }
+        $config = config(sprintf('firefly.valid_query_filters.%s', $class)) ?? [];
+        if (count($filters->all()) === 0) {
+            return $query;
+        }
+        $query->where(function (Builder $q) use ($config, $filters) {
+            foreach ($filters->all() as $filter) {
+                if (in_array($filter->key(), $config, true)) {
+                    foreach($filter->value() as $value) {
+                        $q->where($filter->key(), 'LIKE', sprintf('%%%s%%', $value));
+                    }
+                }
+            }
+        });
+
+        return $query;
+    }
+
+}
diff --git a/app/Support/JsonApi/FiltersPagination.php b/app/Support/JsonApi/FiltersPagination.php
new file mode 100644
index 0000000000..612b6e3b09
--- /dev/null
+++ b/app/Support/JsonApi/FiltersPagination.php
@@ -0,0 +1,55 @@
+<?php
+/*
+ * FiltersPagination.php
+ * Copyright (c) 2024 james@firefly-iii.org.
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see https://www.gnu.org/licenses/.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Support\JsonApi;
+
+trait FiltersPagination
+{
+
+    protected function filtersPagination(?array $pagination): array
+    {
+        if (null === $pagination) {
+            return [
+                'number' => 1,
+                'size'   => $this->getPageSize(),
+            ];
+        }
+        // cleanup page number
+        $pagination['number'] = (int) ($pagination['number'] ?? 1);
+        $pagination['number'] = min(65536, max($pagination['number'], 1));
+
+        // clean up page size
+        $pagination['size'] = (int) ($pagination['size'] ?? $this->getPageSize());
+        $pagination['size'] = min(1337, max($pagination['size'], 1));
+
+        return $pagination;
+    }
+
+    private function getPageSize(): int
+    {
+        if (auth()->check()) {
+            return (int) app('preferences')->get('listPageSize', 50)->data;
+        }
+        return 50;
+    }
+}
diff --git a/app/Support/JsonApi/SortsCollection.php b/app/Support/JsonApi/SortsCollection.php
new file mode 100644
index 0000000000..30953e32a9
--- /dev/null
+++ b/app/Support/JsonApi/SortsCollection.php
@@ -0,0 +1,40 @@
+<?php
+/*
+ * SortsCollection.php
+ * Copyright (c) 2024 james@firefly-iii.org.
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see https://www.gnu.org/licenses/.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Support\JsonApi;
+
+use Illuminate\Support\Collection;
+use LaravelJsonApi\Core\Query\SortFields;
+
+trait SortsCollection
+{
+    protected function sortCollection(Collection $collection, SortFields $sortFields): Collection {
+
+        foreach($sortFields->all() as $sortField) {
+            $collection = $sortField->isAscending() ? $collection->sortBy($sortField->name()) :  $collection->sortByDesc($sortField->name());
+        }
+
+        return $collection;
+    }
+
+}
diff --git a/app/Support/JsonApi/ValidateSortParameters.php b/app/Support/JsonApi/ValidateSortParameters.php
new file mode 100644
index 0000000000..73d144d05f
--- /dev/null
+++ b/app/Support/JsonApi/ValidateSortParameters.php
@@ -0,0 +1,43 @@
+<?php
+/*
+ * ValidateSortParameters.php
+ * Copyright (c) 2024 james@firefly-iii.org.
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see https://www.gnu.org/licenses/.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Support\JsonApi;
+
+use LaravelJsonApi\Core\Query\SortFields;
+
+trait ValidateSortParameters
+{
+    function validateParams(string $class, SortFields $params): bool
+    {
+
+        $config = config(sprintf('firefly.full_data_set.%s', $class)) ?? [];
+
+        foreach ($params->all() as $field) {
+            if (in_array($field->name(), $config, true)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+}
diff --git a/config/jsonapi.php b/config/jsonapi.php
new file mode 100644
index 0000000000..eb990cac14
--- /dev/null
+++ b/config/jsonapi.php
@@ -0,0 +1,35 @@
+<?php
+
+use FireflyIII\JsonApi\V3\Server;
+
+return [
+
+    /*
+    |--------------------------------------------------------------------------
+    | Root Namespace
+    |--------------------------------------------------------------------------
+    |
+    | The root JSON:API namespace, within your application's namespace.
+    | This is used when generating any class that does not sit *within*
+    | a server's namespace. For example, new servers and filters.
+    |
+    | By default this is set to `JsonApi` which means the root namespace
+    | will be `\App\JsonApi`, if your application's namespace is `App`.
+    */
+    'namespace' => 'JsonApi',
+
+    /*
+    |--------------------------------------------------------------------------
+    | Servers
+    |--------------------------------------------------------------------------
+    |
+    | A list of the JSON:API compliant APIs in your application, referred to
+    | as "servers". They must be listed below, with the array key being the
+    | unique name for each server, and the value being the fully-qualified
+    | class name of the server class.
+    */
+    'servers'   => [
+//        'v1' => \App\JsonApi\V1\Server::class,
+'v3' => Server::class,
+    ],
+];
diff --git a/routes/api.php b/routes/api.php
index f33b7800b3..151f63eb4c 100644
--- a/routes/api.php
+++ b/routes/api.php
@@ -22,6 +22,19 @@
 
 declare(strict_types=1);
 
+use LaravelJsonApi\Laravel\Facades\JsonApiRoute;
+use LaravelJsonApi\Laravel\Routing\ResourceRegistrar;
+use LaravelJsonApi\Laravel\Http\Controllers\JsonApiController;
+
+
+JsonApiRoute::server('v3')
+            ->prefix('v3')
+            ->resources(function (ResourceRegistrar $server) {
+                $server->resource('accounts', JsonApiController::class);
+                $server->resource('users', JsonApiController::class);
+            });
+
+
 // V2 API route for Summary boxes
 // BASIC
 Route::group(