Mercury402: Treasury/FRED financial data over x402 for ChatGPT

io.github.dudman1/mercury402-mcp

Treasury/FRED financial data over x402: pay-per-call US yields, macro and forex in USDC on Base

client:ChatGPT transport:streamable-http runtime:npm tools:2

Install Mercury402: Treasury/FRED financial data over x402 in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://mcp.mercury402.com/mcp

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