{"uid":"cap_K8KTTZo1nMtosZMPHAW3w","slug":"blockscout-external-transactions-lookup-ee228498","name":"Blockscout External Transactions Lookup","description":"Explore crypto activities with Blockscout's multichain search. Find transactions, addresses, tokens, and dapps across top blockchain networks — your go-to explorer for cross-chain blockchain data","url":"https://api.blockscout.com/%7Bchain_id%7D/api/v2/transactions/%7Btransaction_hash_param%7D/external-transactions","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"pathParams":{"type":"object","properties":{"chain_id":{"type":"string"},"transaction_hash_param":{"type":"string"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":["string"]},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_jBjuZ0pad7v_e_-9GWThP","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Retrieves external (internal) transactions associated with a specific transaction hash on a given blockchain network via Blockscout's multichain explorer API","exampleAgentPrompt":"Can you pull up all the external transactions triggered by the transaction hash 0xabc123...def on Ethereum (chain ID 1) using Blockscout?","exampleUseCases":[{"title":"DeFi trade sub-call inspection","prompt":"Show me all the external transactions that were triggered when this Uniswap swap happened — the tx hash is 0x4f3a...8c21 on Ethereum mainnet (chain ID 1)."},{"title":"Smart contract audit trail","prompt":"I need to trace every external call spawned by transaction 0x9d2b...7e44 on Polygon (chain ID 137) to understand what contracts it touched."},{"title":"Cross-chain bridge transaction verification","prompt":"Can you fetch the external transactions for tx hash 0x1a7f...30bc on Arbitrum (chain ID 42161) so I can verify all the internal value transfers went through correctly?"}],"resultDescription":"A JSON array of external (internal) transaction records associated with the given transaction hash on the specified blockchain, including details such as value transfers, contract calls, and sub-transaction metadata generated by the top-level transaction.","failureModes":["Invalid or unknown chain_id returns an error or empty result","Malformed transaction hash returns a 400 or 422 validation error","Transaction hash not found on the specified chain returns an empty array or 404","Network timeout or Blockscout node unavailability returns a 5xx error","Transaction has no external transactions, returning an empty array"],"whenToPreferThis":"Choose this endpoint when you need to inspect the internal/external sub-transactions spawned by a specific on-chain transaction across any of Blockscout's supported networks. It is ideal for tracing smart contract interactions, auditing DeFi operations, or verifying that all value transfers within a complex transaction executed correctly. Prefer this over generic block explorers when you need programmatic multichain access with a consistent API interface.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-12T00:55:23.003Z","isFirstParty":false}