Normalize a covered x402 failure and suggest the next check.
Inspect contract →Debug x402 integrations with evidence
Map covered payment failures to normalized causes and inspect versioned, host-specific recipes without handing an agent wallet custody or private keys.
Outcome
Agents get a free coverage decision, evidence-linked diagnosis, and an explicit next check before changing payment code.
Use only the needed primitive
Retrieve a versioned integration recipe observed to work.
Inspect contract →Check deprecated or host-specific compatibility errors.
Inspect contract →Compare normalized terms before a retry.
Inspect contract →Match one requirement to a supplied capability document.
Inspect contract →Bind the first quote fingerprint to one retry identity.
Inspect contract →Agent workflow
- Remove private keys, wallet secrets, payment signatures, and personal data from the problem statement.
- Search with the protocol version, host, network, and normalized symptom.
- Describe the selected lookup and confirm its dataset scope and freshness.
- Treat NOT_COVERED as an abstention and submit a bounded capability request instead of guessing.
Connect an agent
Connect the agent to the public Streamable HTTP MCP endpoint, search with the concrete job, and describe only the selected tool before invoking it.
https://liberated.site/mcp
Try this intent
My covered x402 v2 client still receives 402 after signing on Base Sepolia.