| 1: | <?php |
| 2: | |
| 3: | declare(strict_types=1); |
| 4: | |
| 5: | /** |
| 6: | * This file is part of the Nexus MCP SDK package. |
| 7: | * |
| 8: | * (c) 2026 John Paul E. Balandan, CPA <paulbalandan@gmail.com> |
| 9: | * |
| 10: | * For the full copyright and license information, please view |
| 11: | * the LICENSE file that was distributed with this source code. |
| 12: | */ |
| 13: | |
| 14: | namespace Nexus\Mcp\Server\Auth; |
| 15: | |
| 16: | use Nexus\Mcp\Core\Auth\VerifiedAccessToken; |
| 17: | |
| 18: | /** |
| 19: | * Turns a bearer token into what it grants. The SDK ships no signature or introspection machinery, so a host |
| 20: | * supplies the verification its authorization server calls for. |
| 21: | * |
| 22: | * An implementation owns the whole of token validation, signature or introspection and expiry included, and |
| 23: | * rejects a token it cannot verify by returning `null`. Only two checks are not its job: |
| 24: | * `BearerAuthenticationMiddleware` binds the returned audience to this server and enforces the scopes the |
| 25: | * endpoint requires. |
| 26: | * |
| 27: | * @see https://modelcontextprotocol.io/specification/2026-07-28/basic/authorization#token-handling |
| 28: | */ |
| 29: | interface AccessTokenValidatorInterface |
| 30: | { |
| 31: | public function validate(string $token): ?VerifiedAccessToken; |
| 32: | } |
| 33: |