{"uid":"cap_NpC0xDcz04QOwMcRzi_nz","slug":"nexusapi-crypto-transaction-trace-4cdc0df5","name":"NexusAPI Crypto Transaction Trace","description":"Crypto, AI, Social Media, Finance, Weather, Tools & more. Pay per call in USDC on Base. No API keys.","url":"https://nexus-api-peach-nine.vercel.app/api/crypto/transaction/trace","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"query":{"type":"string","description":"Search query or input parameter"}}},"responseSchema":{"type":"object","description":"API response data"},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.078241","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":"$0.078241/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.078241","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.078241","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_uYjvK5Ks5Llhj8UxLBKEU","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.078241","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Traces a cryptocurrency transaction to reveal its full execution path, internal calls, and state changes on-chain","exampleAgentPrompt":"Can you trace this transaction and show me all the internal calls and what happened step by step: 0x4e3a3754410177e6937ef1f84bba68ea139e8d1ad6d616ffd7c3f7bfd15a20d2?","exampleUseCases":[{"title":"Debug failed smart contract interaction","prompt":"I tried to swap tokens on this DEX but it failed. Can you trace the transaction and show me exactly where it reverted and why: 0x8c2e1f5a9b3d7e4c6a2f8b1e3d5c7a9f2e4b6c8a0d2e4f6a8b0c2e4f6a8b1c?"},{"title":"Audit complex DeFi transaction flow","prompt":"I need to understand every internal transfer and state change in this lending protocol transaction. Can you break down all the internal calls and show me where each token went: 0x5a7c2e1b3f6d8a9c0e2f4b6a8c1e3d5f7a9b2c4e6f8a0b2d4e6f8a0c2e4f6a?"},{"title":"Investigate token bridge execution details","prompt":"I sent tokens across a bridge and want to verify they went through correctly. Can you show me the full call stack and all the internal transfers that happened during this transaction: 0x1d3e5f7a9b0c2e4f6a8b1c3e5d7f9a0b2c4e6f8a0c2e4f6a8b1c3e5d7f9a0b?"}],"resultDescription":"Returns a detailed trace of the specified blockchain transaction, including internal call stack, sub-calls, value transfers, state changes, execution steps, and any revert reasons if the transaction failed.","failureModes":["Invalid or malformed transaction hash returns 400 error","Transaction not found on supported chains returns empty or 404 response","Network timeout for very complex transactions with deep call stacks","Unsupported blockchain network returns error","Rate limiting or payment failure returns 402"],"whenToPreferThis":"Use this endpoint when you need to deeply inspect the internal execution of a blockchain transaction — especially for debugging failed smart contract calls, auditing token transfers, or investigating complex DeFi interactions. Prefer this over simple transaction lookup endpoints when you need the full call trace rather than just top-level transaction metadata.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T18:43:27.508Z","isFirstParty":false}