Codex

Codex has native MCP support via a streamable HTTP server.

1. Use a Codex build with MCP enabled and set [features].rmcp_client = true in ~/.codex/config.toml.
2. Add an [mcp_servers.<name>] entry with the base URL.
3. Put the token in an environment variable (for example MCP_AUTH_TOKEN) so Codex sends it as a

bearer token, then restart Codex.

[features]
rmcp_client = true

[mcp_servers.my_mcp_server]
url = "https://saas.seekdown.ai/api/public/mcp/<server-key>"
http_headers = { "Authorization" = "Bearer <your-mcp-key>" }