Unified AI System MCP Server

Connect Codex and other MCP hosts to the credential-free Unified AI System preview over stdio or MCP Streamable HTTP.

The server starts an isolated local gateway automatically, pins it to the deterministic fake provider, exposes authenticated permission-scoped tools, and removes the gateway when the MCP session ends. It does not enable or authorize real provider calls.

Tools

Agent Governance inspection tools are read-only. workflow_run writes one controlled local artifact. Agent creation remains available through the REST, shared-SDK, and human Agent Console surfaces because the MCP tool protocol cannot yet prove idempotent, cancellation-safe generation after a transport timeout. No MCP tool exposes Agent creation/execution/revocation, approval/rejection, or policy creation/activation. Governance tools never accept tenantId or ownerUserId: the Gateway binds both from its authenticated identity, and cross-tenant descriptions fail as not found. workflow_run never overwrites an existing path and is routed through Agent Governance when the connected Gateway enables that control plane. The chat tool checks the gateway safety state before every request and fails closed unless realProviderEnabled is exactly false and the response proves executionMode: "fake".

The source build exposes sixteen tools, including the four Agent Governance lifecycle tools and the provider-free gateway_prompt_enhance preview. Published images expose the tool set shipped by their pinned tag.

Run From Source

From the repository root:

pnpm install --frozen-lockfile
node packages/mcp-server/src/index.js

The project-level .codex/config.toml registers that command automatically in trusted Codex projects. Restart Codex after cloning or changing MCP configuration, then use /mcp to inspect the server.

Streamable HTTP

Start the source-build HTTP transport:

pnpm mcp:http

The MCP endpoint is http://127.0.0.1:3210/mcp. It listens on loopback by default, validates Host and Origin, starts the same fake-provider gateway, and exposes the same sixteen source-build tools as stdio. Point any MCP Streamable HTTP client at that URL.

For a local token-protected endpoint, set MCP_HTTP_AUTH_TOKEN and send it as Authorization: Bearer <token>. Binding beyond loopback fails closed unless all of these variables are present:

Example for a private deployment behind a TLS reverse proxy:

MCP_HTTP_HOST=0.0.0.0 \
MCP_HTTP_AUTH_TOKEN=replace-with-a-random-secret-of-at-least-32-bytes \
MCP_HTTP_ALLOWED_HOSTS=mcp.example.com \
MCP_HTTP_ALLOWED_ORIGINS=console.example.com \
pnpm mcp:http

The built-in Bearer token is a bounded self-hosting control, not an OAuth authorization server. Terminate TLS at a trusted reverse proxy and use a dedicated identity layer before exposing the endpoint to untrusted networks. The published v0.5.0 container remains stdio-only; the HTTP command above is source-build functionality until a later release publishes it.

Add To Codex With Docker

No clone or API key is required:

codex mcp add unified-ai-system -- docker run --rm -i ghcr.io/happy520ai/unified-ai-system/mcp-server:0.7.0

The dedicated image starts the MCP server by default; no command override is required, and it invokes Node directly so package-manager output cannot pollute the JSON-RPC stream. Its OCI identity and stdio transport are declared in the repository root server.json for the official MCP Registry.

The equivalent config.toml entry is:

[mcp_servers.unified_ai_system]
command = "docker"
args = [
  "run",
  "--rm",
  "-i",
  "ghcr.io/happy520ai/unified-ai-system/mcp-server:0.7.0",
]
startup_timeout_sec = 45
tool_timeout_sec = 60
default_tools_approval_mode = "writes"

For clients that accept the standard JSON mcpServers shape, use the generic MCP client configuration guide.

Try It In Codex

Restart Codex after adding the server, then run /mcp verbose to inspect the connected tools. A useful first task is:

Use gateway_prompt_enhance to turn "build a small API for my team" into a coding prompt. Show the preserved original request, detected language, enhanced prompt, and proof that no provider was called.

Then prove the fake-chat safety boundary:

Use the Unified AI System MCP tools to check gateway health and readiness, then send MCP_READY through gateway chat only if the gateway proves fake-only mode. Report the provider, model, execution mode, and response.

The 60-second Codex MCP quickstart includes two more safe tasks, expected evidence, diagnostics, and the removal command.

Connect To An Existing Safe Gateway

Set AI_GATEWAY_MCP_URL and a dedicated gateway access token to use an already running instance:

AI_GATEWAY_MCP_URL=http://127.0.0.1:3100 \
AI_GATEWAY_MCP_AUTH_TOKEN=<at-least-32-character-gateway-token> \
node packages/mcp-server/src/index.js

The managed gateway uses a private least-privilege token whose lifetime is bounded by the isolated child process; it is never emitted in MCP results. External gateway startup rejects missing or weak tokens, URL credentials, non-loopback plaintext HTTP, invalid authentication, or any gateway that may call a real provider. Provider credentials and real-provider execution remain outside this preview surface.

For Agent Governance, give the dedicated Gateway identity only dashboard:read and workflow:run unless a broader operator workflow is explicitly required. agent_governance_status additionally requires the Gateway's platform-tenant identity; ordinary tenants can still use tenant-scoped list, generate, and describe. Do not grant workflow:approve or user:admin to an MCP model merely to use these tools.

Verify

The tests launch both transports through the official MCP v2 client. They pin the modern 2026-07-28 stateless era on stdio and Streamable HTTP, retain legacy 2025-11-25 plus 2025-06-18 initialize compatibility, list all source-build tools, prove local prompt enhancement and fake-provider safety, exercise HTTP/CORS access controls, close the clients, and confirm that each managed gateway stopped. The container-safe raw smoke also uses server/discover plus a per-request _meta envelope rather than inferring modern support from the SDK version:

pnpm verify:mcp