{"uid":"cap_lzS9Tyyehi1W5dFh3f5sw","slug":"polymer-labs-proof-generation-query-api-d3de8a77","name":"Polymer Labs Proof Generation & Query API","description":"Access Polymer Labs proof generation and query service","url":"https://api.polymer.zone/x402/v1","method":"POST","headers":{},"bodySchema":{"type":"object","required":["id","method","params","jsonrpc"],"properties":{"id":{"type":"number","description":"Request identifier"},"method":{"enum":["proof_request","proof_query"],"type":"string","description":"RPC method to invoke"},"params":{"type":"array","description":"proof_request: [{srcChainId, srcBlockNumber, globalLogIndex}], proof_query: [jobId]"},"jsonrpc":{"enum":["2.0"],"type":"string","description":"JSON-RPC protocol version"}}},"responseSchema":null,"example":{"request":{"id":1,"method":"proof_request","params":[{"srcChainId":10,"globalLogIndex":42,"srcBlockNumber":21500000}],"jsonrpc":"2.0"},"response":{"id":1,"result":1564956,"jsonrpc":"2.0"}},"exampleRequest":{"id":1,"method":"proof_request","params":[{"srcChainId":10,"globalLogIndex":42,"srcBlockNumber":21500000}],"jsonrpc":"2.0"},"tags":["x402"],"displayCostAmount":"0.1","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":"$0.1/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_0LDTIgoIHPM_Ao4xjA_ii","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.1","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Generates and queries cross-chain event proofs using JSON-RPC, enabling verification of on-chain events across blockchain networks","exampleAgentPrompt":"Generate a cross-chain proof for an event on source chain 10 at block 21500000 with global log index 42, then query the job status once it's submitted.","exampleUseCases":null,"resultDescription":"Returns a JSON-RPC response containing either a job ID for a newly submitted proof generation request (proof_request), or the current status and proof data for an existing job (proof_query), including the cryptographic proof needed to verify a cross-chain event.","failureModes":["Invalid or missing srcChainId returns an error indicating unsupported chain","Block number not yet finalized causes proof generation failure","Invalid jobId in proof_query returns not-found error","Malformed JSON-RPC request (missing jsonrpc version or id) returns parse error","Payment not received (402) blocks request processing","Log index does not exist at specified block returns empty or error response"],"whenToPreferThis":"Use this endpoint when you need cryptographic proofs of on-chain events across blockchain networks, particularly for cross-chain interoperability via IBC-style proofs. Prefer this over generic blockchain RPC endpoints when you specifically need Polymer Labs' proof generation infrastructure for verifying events from one chain on another.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:37:12.263Z","isFirstParty":false}