Connecting an MCP Client - ferrule-io/ok-fine GitHub Wiki

Locally, clients can start ok-fine themselves over stdio, with no server, URL, or authentication (see Running locally). Any number of concurrent sessions can share the same data directory with no extra configuration:

{
  "mcpServers": {
    "ok-fine": {
      "command": "npx",
      "args": ["-y", "@ferrule-io/ok-fine"]
    }
  }
}

Over HTTP, the MCP endpoint is <PUBLIC_BASE_URL>/mcp. It serves the 2026-07-28 protocol and the legacy 2025-11-25, 2025-06-18, and 2025-03-26 protocols statelessly.

When running with AUTH_MODE=none, no Authorization header or OAuth configuration is needed; point clients directly at http://localhost:8080/mcp:

{
  "mcpServers": {
    "ok-fine": {
      "type": "http",
      "url": "http://localhost:8080/mcp"
    }
  }
}

In AUTH_MODE=oidc, clients that support MCP authorization discover the identity provider from the 401 challenge (WWW-Authenticate: Bearer … resource_metadata="<PUBLIC_BASE_URL>/.well-known/oauth-protected-resource/mcp"). Clients that take a static header can pass Authorization: Bearer <token> directly:

{
  "mcpServers": {
    "ok-fine": {
      "type": "http",
      "url": "https://okf.example.com/mcp",
      "headers": { "Authorization": "Bearer ${OKF_TOKEN}" }
    }
  }
}

When running with AUTH_MODE=api_key (or when API keys are enabled in oidc mode, see Authentication and authorization), clients authenticate by passing the API key in the configured header (default X-API-Key) or as a Bearer token in the Authorization header.

Using the Claude Code CLI:

claude mcp add --transport http ok-fine https://okf.example.com/mcp --header "X-API-Key: <key>"

In generic MCP client configuration (mcpServers JSON), pass the header in headers:

{
  "mcpServers": {
    "ok-fine": {
      "type": "http",
      "url": "https://okf.example.com/mcp",
      "headers": {
        "X-API-Key": "<key>"
      }
    }
  }
}

Alternatively, pass the key as a static Bearer token:

{
  "mcpServers": {
    "ok-fine": {
      "type": "http",
      "url": "https://okf.example.com/mcp",
      "headers": {
        "Authorization": "Bearer <key>"
      }
    }
  }
}

Note: Clients that only support dynamic OAuth discovery (and cannot be configured with custom headers or a static token) cannot connect in AUTH_MODE=api_key because OAuth discovery endpoints are not registered. Such clients can use Authorization: Bearer <key> only if they allow specifying a static bearer token.

The server sends usage instructions to the client on connect (note: claude.ai and Claude Desktop drop instructions, so the same routing guidance is included in the list_projects and search_concepts tool descriptions). In short:

1. If a project is named explicitly by the user or workspace instructions, use it.
2. In a git repository with a remote, resolve with list_projects passing repository (e.g. from git remote get-url origin); if none match, offer onboarding via the ok-fine-onboard skill.
3. Otherwise (no repository, no shell, or no remote), call orient with the user's question to rank relevant projects and concepts across the organization, or call list_projects (with team and/or query, or without arguments) and pick by title and description, or search across all projects with search_concepts omitting project. Never run git commands or offer onboarding on this path.

Discover with get_index or search_concepts, read with read_concept, write with write_concept passing expectedRevision, and prefer status: deprecated over deleting.