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# Valuable references for the reviewer: - Docs PR: https://github.com/ArcadeAI/docs/pull/583 - Implements Phase 1 of the following planning doc: https://linear.app/arcadedev/project/arcade-mcp-supports-mcp-auth-front-door-auth-7cbaa20cb054/overview https://github.com/user-attachments/assets/79ad43fd-f5e8-4793-a1dd-18b35acefdc3 # PR Description Adds OAuth 2.1 Resource Server authentication to arcade-mcp-server, enabling HTTP MCP servers to validate Bearer tokens on every request. This unlocks tool-level authorization and secrets support for HTTP servers. - Multiple authorization server support - Granular token validation options (verify_exp, verify_iat, verify_iss) - Environment variable configuration - OAuth discovery metadata endpoint (/.well-known/oauth-protected-resource) - Extracts sub claim from token as context.user_id - Lifts transport restrictions for tools requiring auth/secrets on HTTP when protected ```python from arcade_mcp_server import MCPApp from arcade_mcp_server.resource_server import ResourceServerAuth, AuthorizationServerEntry resource_server_auth = ResourceServerAuth( canonical_url="http://127.0.0.1:8000/mcp", authorization_servers=[ AuthorizationServerEntry( authorization_server_url="https://auth.example.com", issuer="https://auth.example.com", jwks_uri="https://auth.example.com/jwks", ) ], ) app = MCPApp(name="my_server", version="1.0.0", auth=resource_server_auth) ``` # Testing Beyond the comprehensive unit tests, I also manually tested end-to-end with WorkOS Authkit (DCR) and KeyCloak (non-DCR). # Future Work - CIMD support - An `ArcadeResourceServer` to make adding front-door auth super easy when using Arcade's Auth Server <!-- CURSOR_SUMMARY --> --- > [!NOTE] > Adds OAuth 2.1 front-door auth (JWKS validation + OAuth discovery) and propagates user identity to tools, enabling auth/secret-requiring tools over HTTP. > > - **Authentication (Front-Door OAuth 2.1)** > - New `resource_server` module with `ResourceServerAuth` (multi-authorization-server, metadata) and `JWKSTokenValidator` (JWKS-based JWT validation) plus granular validation options. > - ASGI `ResourceServerMiddleware` validates Bearer tokens on every HTTP request and injects `resource_owner`. > - OAuth discovery endpoint via FastAPI router at `/.well-known/oauth-protected-resource[/<path>]`. > - **Integration** > - `MCPApp`/`worker` accept `auth`/`resource_server_validator`, mount middleware, expose discovery; logs accepted auth servers. > - HTTP transport (`http_streamable`) carries `SessionMessage` with `resource_owner` from request → session. > - `Context`/`Session`/`Server` plumb `resource_owner`; `Server` selects `user_id` preferring token `sub`. > - **Behavior Changes** > - HTTP transport restriction lifted for tools requiring `authorization`/`secrets` when request is authenticated; otherwise blocked with actionable error. > - **Configuration** > - Env-var based auth config via `MCP_RESOURCE_SERVER_*` in `MCPSettings.ResourceServerSettings`; `.env` auto-load. > - **Telemetry** > - Usage tracking records `resource_server_type` on server start. > - **Examples** > - New `examples/mcp_servers/authorization` sample server (HTTP auth, secrets, Reddit tool) with Docker setup. > - **Tests** > - Extensive unit tests for validators, middleware, env config, multi-AS, transport rules, and app integration. > - **Version** > - Bump `arcade-mcp-server` to `1.12.0`; minor docstring tweak in `__init__.py`. > > <sup>Written by [Cursor Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit d1116cdcafb0c7cb8f91e66682eb1fbae380da31. This will update automatically on new commits. Configure [here](https://cursor.com/dashboard?tab=bugbot).</sup> <!-- /CURSOR_SUMMARY --> Resolves TOO-152
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45 lines
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[project]
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name = "authorization"
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version = "0.1.0"
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description = "MCP Server created with Arcade.dev"
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requires-python = ">=3.10"
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dependencies = [
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"arcade-mcp-server>=1.8.0,<2.0.0",
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"httpx>=0.28.0,<1.0.0",
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]
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[project.optional-dependencies]
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dev = [
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"arcade-mcp[all]>=1.5.2,<2.0.0",
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"pytest>=7.0.0",
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"pytest-asyncio>=0.21.0",
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"mypy>=1.0.0",
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"ruff>=0.1.0",
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]
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# Tell Arcade.dev that this package has Arcade tools
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[project.entry-points.arcade_toolkits]
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toolkit_name = "authorization"
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[build-system]
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requires = ["hatchling"]
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build-backend = "hatchling.build"
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[tool.hatch.build.targets.wheel]
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packages = ["src/authorization"]
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[tool.ruff]
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line-length = 100
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target-version = "py312"
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[tool.mypy]
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python_version = "3.12"
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warn_unused_configs = true
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disallow_untyped_defs = false
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# # Uncomment the following if you are developing inside of the arcade-mcp repo & want to use editable mode
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# # Otherwise, you will install the following packages from PyPI
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# [tool.uv.sources]
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# arcade-mcp = { path = "../../../", editable = true }
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# arcade-serve = { path = "../../../libs/arcade-serve/", editable = true }
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# arcade-mcp-server = { path = "../../../libs/arcade-mcp-server/", editable = true }
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