> ## Documentation Index
> Fetch the complete documentation index at: https://docs.agntor.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Troubleshooting

> Common issues and fixes

# Troubleshooting

## 402 responses without proof

Ensure you are passing `X-AGNTOR-Proof` and `payment_protocol: "x402"` when required.

## Invalid signature

Check `AGNTOR_SECRET_KEY` matches the signing key used by the issuer.