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Echo Zero exposes an MCP server so Claude, ChatGPT, Cursor, and other assistants can call tools, read resources, and use prompts on behalf of authenticated users.
https://mcp.echozero.app/mcp is a JSON-RPC POST endpoint, not a web page. Opening it in a browser (GET) returns an error. Configure your MCP client to send POST requests instead.

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Endpoints

SurfaceURLMethod
MCP (Streamable HTTP)https://mcp.echozero.app/mcpPOST
MCP SSE streamhttps://mcp.echozero.app/mcp/sseGET (after initialize)
End sessionhttps://mcp.echozero.app/mcpDELETE
Directory metadatahttps://mcp.echozero.app/public/index.jsonGET

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Authentication

Send the same credentials as REST on every MCP request, including initialize:
  • x-api-key: <developer_api_key>, or
  • Authorization: Bearer <access_token> (API key or OAuth token)
See OAuth 2.1 and API keys + HMAC.

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Connect a client

  1. Set the MCP server URL to https://mcp.echozero.app/mcp.
  2. Authenticate with your API key or complete the OAuth flow via the Dev Portal.
  3. Send initialize over POST /mcp with Accept: application/json, text/event-stream.
  4. On subsequent calls, include the mcp-session-id header returned from initialize.

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Example initialize request

curl -sS https://mcp.echozero.app/mcp \
  -H "x-api-key: $EZ_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "initialize",
    "params": {
      "protocolVersion": "2025-03-26",
      "capabilities": {},
      "clientInfo": { "name": "my-client", "version": "1.0.0" }
    }
  }'

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Tools, resources, and scopes

Available MCP tools, resources, and prompts are scope-gated by the API key. Common scopes include read:agents, write:agents, read:wallet, write:wallet, read:strategies, write:strategies, read:trades, read:tokens, write:ai, and admin:*.

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Directory integrations

For ChatGPT, Claude, Gemini, and other directory submissions, fetch connector metadata from: 
https://mcp.echozero.app/public/index.json
That index links to per-platform manifests under /public/directory/*.