{"uid":"cap_rz1XgGaN1_OWxQNRDsAzr","slug":"blockscout-multichain-block-number-search-b2728571","name":"Blockscout Multichain Block Number Search","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/services/multichain/api/v1/clusters/%7Bcluster_id%7D/search/block-numbers","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":{"cluster_id":{"type":"string"}}},"queryParams":{"type":"object","properties":{"q":{"type":"string"},"chain_id":{"type":"array"},"page_size":{"type":"integer"},"page_token":{"type":"string"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"items":[{"chain_id":"string","block_number":"string"}],"next_page_params":{"page_size":0,"page_token":"string"}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.012","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":"$0.012/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.012","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.012","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm__3_iZhaRXYWTKq114Jv8L","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.012","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Search for block numbers matching a query across multiple blockchain networks within a cluster using Blockscout's multichain explorer","exampleAgentPrompt":"Search Blockscout's multichain explorer for block numbers matching '0xabc123' across Ethereum and Arbitrum in cluster 'mainnet-cluster', returning up to 10 results.","exampleUseCases":[{"title":"Cross-chain block confirmation lookup","prompt":"I need to find what block number a specific transaction hash was included in across Ethereum, Polygon, and Arbitrum — can you search Blockscout's multichain cluster 'evm-mainnet' for block numbers matching '0x4f3a9b2c1d' and show me 20 results?"},{"title":"Multichain block audit trail","prompt":"For my compliance report, search Blockscout's cluster 'prod-cluster' for block numbers associated with address '0xdead...beef' on chain IDs 1 and 137, paginated at 25 per page."},{"title":"Block number verification across networks","prompt":"Can you check Blockscout's multichain search in cluster 'testnet-cluster' to find block numbers matching the token contract '0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48' on chain 1?"}],"resultDescription":"Returns a paginated list of items each containing a chain_id and block_number where the search query matched, along with next_page_params (page_token and page_size) for fetching subsequent pages.","failureModes":["Invalid or unknown cluster_id returns 404","Missing required query parameter 'q' may return empty results or error","Unsupported chain_id values may be silently ignored or return no results","Payment failure (x402) if USDC balance is insufficient","Rate limiting if too many requests are made in quick succession","Large page_size values may be capped or cause slower responses"],"whenToPreferThis":"Use this endpoint when you need to find block numbers across multiple blockchain networks simultaneously using a single query, particularly when you have a cluster_id grouping the chains you care about. Prefer this over single-chain block explorers when doing cross-chain research, auditing, or verification tasks that span EVM-compatible networks.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-10T06:40:38.729Z","isFirstParty":false}