{"uid":"cap_zheySW1gnK4CWqAvQ13Fl","slug":"datapackvibe-ethereum-event-log-decoder-21825c2d","name":"DataPackVibe Ethereum Event Log Decoder","description":"Decode Ethereum event logs the caller pastes - topics and data into a named event with typed parameters. Input-in/answer-out: no chain lookup, no invented values.","url":"https://api.datapackvibe.com/log/decode","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"properties":{}},"type":{"type":"string","const":"http"},"method":{"enum":["POST"],"type":"string"},"bodyType":{"enum":["json","form-data","text"],"type":"string"}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.03/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.03","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.03","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_M9K6ULNtCOuGXQNihlOWp","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.03","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Decodes raw Ethereum event log topics and data into a named event with typed, labeled parameters — no on-chain lookup required.","exampleAgentPrompt":"Can you decode this Ethereum event log for me? Topics: [\"0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef\",\"0x000000000000000000000000abcdef1234567890abcdef1234567890abcdef12\",\"0x000000000000000000000000fedcba0987654321fedcba0987654321fedcba09\"] and data: \"0x000000000000000000000000000000000000000000000000016345785d8a0000\" — tell me what event this is and what each parameter means.","exampleUseCases":[{"title":"Debugging a failed DeFi transaction","prompt":"I'm looking at a transaction receipt and one of the logs has these topics and data — can you decode it and tell me what event was emitted and what each field is? Topics: [\"0x1c411e9a96e071241c2f21f7726b17ae89e3cab4c78be50e062b03a9fffbbad1\",\"0x0000000000000000000000000000000000000000000000000000000000000001\"] data: \"0x00000000000000000000000000000000000000000002bdc5b1a8c10fccfe0000000000000000000000000000000000000000000000000ad78ebc5ac6200000\""},{"title":"Reading an NFT mint event log","prompt":"Here's a raw Ethereum log from an NFT contract — topics: [\"0xc3d58168c5ae7397731d063d5bbf3d657854427343f4c083240f7aacaa2d0f62\",\"0x000000000000000000000000aaaa\",\"0x0000000000000000000000000000000000000000000000000000000000000000\",\"0x000000000000000000000000bbbb\"] data: \"0x00000000000000000000000000000000000000000000000000000000000003e8000000000000000000000000000000000000000000000000000000000000000a\" — decode this and tell me the event name and what each parameter says."},{"title":"Auditing a governance vote event","prompt":"I'm auditing a DAO contract and found this emitted log — can you decode it into a named event with all the typed parameters? Topics: [\"0x877856338e13f63d0c36822ff0ef736b647b7bf99c8ce2acacdc5f3b6b2a5c2e\",\"0x0000000000000000000000001234567890abcdef1234567890abcdef12345678\"] data: \"0x000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000021e19e0c9bab2400000\""}],"resultDescription":"Returns the decoded event name and a list of named, typed parameters with their values — all derived from the ABI-encoded topics and data provided, with no on-chain or external lookups performed.","failureModes":["Malformed or truncated topics/data returns a decode error","Unknown event signature (topic[0] not recognized) returns an unrecognized event error","Mismatched ABI encoding (wrong parameter count or type) returns a parse failure","Missing required body fields returns a validation error","Ambiguous or incomplete hex strings cause decoding failures"],"whenToPreferThis":"Use this endpoint when you have raw Ethereum event log topics and data and need to decode them into human-readable event names and typed parameters offline — without querying an RPC node, Etherscan, or any external blockchain service. Ideal for transaction receipt parsing, debugging, auditing, or building tools that need fast, stateless log interpretation.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:35:44.572Z","isFirstParty":false}