simceptor for ChatGPT

io.github.ayda212/simceptor

AI-native mock API server with MCP. Create REST/SOAP mocks from Claude, Cursor, or Windsurf.

client:ChatGPT transport:streamable-http

Install simceptor in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://simceptor.com/api/mcp/sse

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