{"uid":"cap_nhv9dYgJZ2LhrLdIXNBh7","slug":"base-contract-interaction-summary-ae84a446","name":"Base Contract Interaction Summary","description":"Explore 330 pay-per-call x402 API services and 27 agent-native digital products, with Base USDC pricing, secure Polar checkout, and free discovery.","url":"https://signalharness.ai/api/agent/services/base_contract_interaction_summary/invoke","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"request_json":{"type":"string","maxLength":65536,"minLength":2}}},"responseSchema":{"type":"json","example":{"replay":false,"result":{"warnings":["Does not infer contract intent or safety."],"service_id":"base_contract_interaction_summary","analysis_json":"{\"call_count\":0,\"contracts\":[\"0x0000000000000000000000000000000000000002\",\"0x0000000000000000000000000000000000000001\"],\"flow\":{\"ledger\":[],\"transfer_count\":0},\"log_count\":1,\"network_context\":{\"accepted_chain_ids\":[\"8453\",\"84532\"],\"deposit_transaction_type\":\"0x7e\",\"fee_model\":\"L2 execution plus caller-supplied L1 data/operator components\",\"protocol_family\":\"OP Stack\"},\"selectors\":[\"0xa9059cbb\"],\"to\":\"0x0000000000000000000000000000000000000002\",\"transaction_hash\":\"0x1111111111111111111111111111111111111111111111111111111111111111\",\"value\":\"0\"}","evidence_scope":"caller_supplied_data","analyzed_network":"base"},"status":"succeeded","receipt":{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","usage":[],"status":"succeeded","network":"eip155:8453","artifacts":[],"endedAtMs":0,"latencyMs":0,"paymentId":"example-payment","receiptId":"example-receipt","requestId":"example-request","serviceId":"base_contract_interaction_summary","executionId":"example-execution","startedAtMs":0,"amountAtomic":"20000","resultSha256":"45a7d2a30ca75703865d4ff4d53b4373b8b24514470208d42c54de9bcc155628","serviceVersion":"1.0.0","settlementReference":"0x0000000000000000000000000000000000000000000000000000000000000000"},"artifacts":[],"requestId":"example-request","executionId":"example-execution"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_gFGN0wzJN9ccCYuBA443w","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Analyzes a Base blockchain transaction and returns a structured summary of contract calls, token transfers, logs, selectors, and network context","exampleAgentPrompt":"Analyze this Base transaction for me and give me a summary of what contracts were called, how many token transfers happened, and what function selectors were used — here's the transaction JSON: {paste transaction JSON}.","exampleUseCases":[{"title":"Audit a DeFi swap transaction","prompt":"I just submitted a swap on Base and want to know exactly which contracts were called and whether any tokens moved — here's the raw transaction JSON, can you break it down for me?"},{"title":"Investigate an unknown contract call","prompt":"Someone sent me a transaction on Base mainnet and I'm not sure what it did — can you analyze this transaction JSON and tell me which contract addresses were involved and what function selectors were triggered?"},{"title":"Verify token transfer in an agent workflow","prompt":"My agent just executed a USDC transfer on Base — can you pull the interaction summary from this transaction JSON and confirm how many transfers occurred and whether the flow ledger shows any value movement?"}],"resultDescription":"Returns a JSON analysis object containing the transaction hash, target contract address, list of all contract addresses touched, function selectors called, token transfer count, log count, a flow ledger, call count, and Base/OP Stack network context (accepted chain IDs, fee model, deposit transaction type). Also includes warnings that the service does not infer contract intent or safety.","failureModes":["Malformed or invalid transaction JSON input returns an error","Transaction data referencing unsupported chains (non-Base) may not be analyzed correctly","Service explicitly warns it does not infer contract intent or safety — agent must not rely on it for security judgments","Empty or minimal transaction JSON may yield sparse results with no transfers or logs detected"],"whenToPreferThis":"Choose this endpoint when you need a fast, structured breakdown of a Base (or Base Sepolia) transaction's on-chain mechanics — contract addresses, selectors, transfers, and logs — without needing full ABI decoding or contract intent inference. It is well-suited for agent workflows that need to audit, log, or route based on what happened in a transaction, and it operates on caller-supplied data so no RPC node access is required.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T07:02:36.699Z","isFirstParty":false}