{"route":"/api/agent/premium","method":"POST","auth":{"scheme":"ERC-8128","spec":"https://ethereum-magicians.org/t/erc-8128-signed-http-requests-with-ethereum/","rfc":"https://datatracker.ietf.org/doc/rfc9421/","keyidFormat":"erc8128:8453:<address>","chainId":8453,"chainName":"Base"},"requirements":{"minTier":"Gold","minTierValue":3,"scoreSource":"0x5CfAB4B12718549e156D3642f9C63476aC4c2f99","scoreFunction":"VaultfireStreetCred.computeScore(address)"},"requiredHeaders":["Signature","Signature-Input","Content-Digest (for POST with body)"],"sdk":{"package":"@vaultfire/agent-sdk","version":">=0.6.0","helper":"signedFetch(url, init, signer)"},"description":"Premium endpoint for Gold+ tier Vaultfire agents. Returns full Street Cred breakdown, bond profile, and insurance eligibility. Requires a valid ERC-8128 signed HTTP request.","errorCodes":{"unsigned":"401 — Missing Signature/Signature-Input headers","invalid_signature":"401 — Signature failed verification (tampered, expired, replay, or wrong address)","insufficient_tier":"403 — Agent below Gold tier"}}