Cortex Gateway

Cortex Gateway MCP Server

Hosted demo of the open-source Cortex Gateway, a single OAuth 2.1-protected MCP server (Streamable HTTP; MCP 2026-07-28, 2025-11-25, 2025-06-18 and 2025-03-26 per the provider's SEP-2127 server card) that federates plain-HTTP backends implementing the Cortex backend contract and propagates the real user's identity. Anonymous JSON-RPC initialize returns 401 invalid_token with an RFC 9728 resource_metadata challenge; no OpenAPI, AsyncAPI, GraphQL, gRPC or WSDL contract is published.

GitHub

Documentation

📖
Documentation
https://github.com/wellknownmcp/cortex-gateway/tree/main/docs
📖
Documentation
https://github.com/wellknownmcp/cortex-gateway/blob/main/docs/backend-contract.md
📖
Documentation
https://cortex-gateway.dev/guides/secure-mcp-with-oauth/

Other Resources

🔗
APIsJSON
https://artifacts.apis.io/cortex-gateway-dev/apis.yml

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API entry from apis.yml

apis.yml Raw ↑ 
aid: cortex-gateway-dev:cortex-gateway-mcp-server
name: Cortex Gateway MCP Server
description: Hosted demo of the open-source Cortex Gateway, a single OAuth 2.1-protected MCP server (Streamable
  HTTP; MCP 2026-07-28, 2025-11-25, 2025-06-18 and 2025-03-26 per the provider's SEP-2127 server card)
  that federates plain-HTTP backends implementing the Cortex backend contract and propagates the real
  user's identity. Anonymous JSON-RPC initialize returns 401 invalid_token with an RFC 9728 resource_metadata
  challenge; no OpenAPI, AsyncAPI, GraphQL, gRPC or WSDL contract is published.
humanURL: https://cortex-gateway.dev/
baseURL: https://mcp.cortex-gateway.dev/mcp
tags:
- MCP
- MCP Gateway
- OAuth 2.1
properties:
- type: Documentation
  url: https://github.com/wellknownmcp/cortex-gateway/tree/main/docs
- type: Documentation
  name: Backend contract
  url: https://github.com/wellknownmcp/cortex-gateway/blob/main/docs/backend-contract.md
- type: Documentation
  name: Secure your MCP server with OAuth 2.1
  url: https://cortex-gateway.dev/guides/secure-mcp-with-oauth/