Fix x402 requests blocked by API gateways - #40
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…allenges instead of blocking Python urllib requests
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August 12, 2026 10:04
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Adds an explicit User-Agent to x402 HTTP requests so API gateways can return payment challenges instead of blocking Python's default urllib client. This fixes real paid endpoints protected by Cloudflare without changing payment selection, signing, or settlement behavior.
Main changes:
MetaMask-Agent-Wallet-x402by default on both challenge and paid retry requests.Reviewer notes:
https://agent-api.degov.ai: the defaultPython-urllib/3.13User-Agent receives HTTP 403, while an explicit User-Agent reaches the expected HTTP 402 challenge.x402_pay.py --help, a read-only liveinspectreturning an eligible x402 v2 Base USDC option, andgit diff --check.