API.market MCP Gateway for ChatGPT

io.github.noveum/api-market-gateway

Connect AI agents to 580+ APIs with OAuth or API-key auth. Hosted gateway; API pricing varies.

client:ChatGPT transport:streamable-http

Install API.market MCP Gateway in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://api.market/api/mcp/gateway

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs