{"uid":"cap_MFEyQWf8Cayo6w9fMCnJI","slug":"theloopbreaker-com-24d346f3","name":"TheLoopBreaker Belief Attestation Filer","description":"File a belief attestation on the BeliefAttestationVerifier contract (zk proof + public inputs). Pay $0.25 USDC, receive a fully-encoded unsigned transaction, sign in your wallet. No private keys handled server-side.","url":"https://theloopbreaker.com/api/x402/actions/file-attestation","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object"},"output":{"type":"object"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.050000","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.050000/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.25","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.25","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_UQa8AJg_cJ3dVOVR_zMeE","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.25","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Prepares an unsigned blockchain transaction to file a zero-knowledge belief attestation on the BeliefAttestationVerifier smart contract, funded by a $0.25 USDC x402 payment","exampleAgentPrompt":"File a belief attestation on the BeliefAttestationVerifier contract using my wallet 0xYourWallet, zk proof 0x1234567890abcdef..., and public inputs [0xabcdef1234567890...] — give me the unsigned transaction I can sign myself.","exampleUseCases":null,"resultDescription":"Returns a fully ABI-encoded unsigned transaction ready to be signed in the caller's wallet. The response includes the transaction payload targeting the BeliefAttestationVerifier contract, along with the x402 payment receipt confirming the $0.25 USDC charge. No private keys are transmitted or handled server-side.","failureModes":["Missing X-PAYMENT header returns HTTP 402 with payment instructions and accepted asset details","Invalid or malformed zk proof bytes result in encoding failure","Public inputs array mismatch with the proof causes contract-level rejection","Wallet address not provided or malformed returns validation error","Payment amount insufficient or asset mismatch triggers x402 rejection"],"whenToPreferThis":"Use this endpoint when you need to file a cryptographically verifiable belief attestation on-chain using a zero-knowledge proof, and want a server-side transaction encoder that never touches your private keys. Ideal for agents operating in the Vaultfire/TheLoopBreaker ecosystem that need to anchor beliefs to the BeliefAttestationVerifier smart contract on Base or supported mainnet chains.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T13:02:35.309Z","isFirstParty":false}