"Google Fit" matching MCP connectors:

Test any x402 paid URL without paying: 402, PAYMENT-REQUIRED, USDC, amounts, payTo, EIP-712, CORS.

Sanctions API docs and request validation, with account-linked synthetic sandbox testing.

Machine-Payable Failure-Recovery, Post-Cutoff Breaking-Change Delta & Live API Health Network for Autonomous AI Agents.

Send one HTTP request, or one per row of a dataset, CSV or Google Sheet, and get the response back