{"uid":"cap_l7AwR6PBy-QVIqndHul7O","slug":"blockscout-block-internal-transactions-a0b37833","name":"Blockscout Block Internal Transactions","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/blocks/%7Bblock_hash_or_number_param%7D/internal-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"},"block_hash_or_number_param":{"type":"string"}}},"queryParams":{"type":"object","properties":{"index":{"type":"integer"},"call_type":{"type":"string"},"items_count":{"type":"integer"},"internal_type":{"type":"string"},"transaction_index":{"type":"integer"},"include_zero_value":{"type":"boolean"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"meta":{"status":0,"message":"string"},"items":[{"to":{},"from":{"hash":"string","name":"string","is_scam":true,"metadata":{},"proxy_type":"string","reputation":"string","is_contract":true,"is_verified":true,"public_tags":[{"label":"string","address_hash":"string","display_name":"string"}],"private_tags":[{"label":"string","address_hash":"string","display_name":"string"}],"ens_domain_name":"string","implementations":[{"name":"string","address_hash":"string"}],"watchlist_names":[{"label":"string","display_name":"string"}]},"type":"string","error":"string","index":0,"value":"string","success":true,"gas_limit":"string","timestamp":"string","block_number":0,"created_contract":{},"transaction_hash":"string","transaction_index":0}],"next_page_params":{}}},"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_2X6nbK8EsDP_7ja_71NzB","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 all internal transactions within a specific block on a given blockchain network via Blockscout's multichain explorer API","exampleAgentPrompt":"Can you pull all the internal transactions from block 19800000 on Ethereum mainnet (chain_id 1) using Blockscout, and show me any that failed or involved contract creation?","exampleUseCases":[{"title":"Audit DeFi protocol block activity","prompt":"I need to see every internal transaction inside block 18500000 on Arbitrum — specifically filter for delegate calls so I can audit how that DeFi protocol was routing funds internally."},{"title":"Investigate failed contract interactions","prompt":"Can you fetch internal transactions from block 12345678 on Polygon using Blockscout and show me which ones failed or threw errors? I want to understand what went wrong in that block."},{"title":"Trace contract creation in a block","prompt":"Look up all internal transactions in block 0xabc123def456 on Base chain and highlight any that resulted in a new contract being created — I'm trying to map out what was deployed in that block."}],"resultDescription":"Returns a paginated list of internal transactions within the specified block, each containing from/to addresses (with ENS names, tags, proxy type, reputation, scam flags), transaction hash, value, gas limit, block number, timestamp, call type, success/error status, created contract details, and next_page_params for pagination.","failureModes":["Invalid or non-existent block hash/number returns empty items or 404","Unsupported chain_id returns an error response","Malformed block_hash_or_number_param causes a bad request error","Rate limiting or payment failure returns 402 or 429","Block exists but has no internal transactions returns an empty items array","Invalid filter parameters (call_type, internal_type) may return no results or an error"],"whenToPreferThis":"Use this endpoint when you need to inspect the internal call tree or sub-transactions within a specific block across any of Blockscout's supported chains. It is ideal for auditing smart contract interactions, tracing DeFi protocol flows, identifying contract deployments, or debugging failed internal calls — especially when you need multichain support from a single API with per-block granularity rather than per-transaction granularity.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T18:50:48.408Z","isFirstParty":false}