{"uid":"cap_ac5PXs4bBmG6f6er-21ub","slug":"blockscout-advanced-filters-list-available-methods-63c0f64b","name":"Blockscout Advanced Filters - List Available Methods","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/advanced-filters/methods","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"}}},"queryParams":{"type":"object","properties":{"q":{"type":"string"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":[{"name":"string","method_id":"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_kES26o4EFteDRR1vNUjqy","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 a list of smart contract method names and IDs available for advanced transaction filtering on a specific blockchain network","exampleAgentPrompt":"What smart contract method names and IDs can I use to filter advanced transactions on Ethereum using Blockscout — show me the full list for chain ID 1.","exampleUseCases":[{"title":"Discover filterable methods for DeFi analysis","prompt":"I want to analyze DeFi swaps on Polygon — can you pull the list of smart contract method names and IDs available for advanced transaction filtering on chain ID 137 from Blockscout?"},{"title":"Build a transaction filter UI for a dapp","prompt":"I'm building a dapp explorer and need to know which contract method IDs are available as filter options on Base (chain ID 8453) — can you fetch them from Blockscout's advanced filters?"},{"title":"Narrow down on-chain activity by method","prompt":"I'm trying to filter Arbitrum transactions by method type — can you get the list of all available method names and their IDs for chain ID 42161 from Blockscout so I know what options I have?"}],"resultDescription":"Returns a JSON array of objects, each containing a method 'name' (human-readable smart contract function name) and 'method_id' (4-byte hex selector), representing all contract methods that can be used as filter criteria in Blockscout's advanced transaction search for the specified chain.","failureModes":["Invalid or unsupported chain_id returns empty list or 404","Network connectivity issues result in timeout","Malformed query parameter q returns error or empty results","Chain not indexed by Blockscout returns no data"],"whenToPreferThis":"Use this endpoint when you need to discover which smart contract method identifiers are supported as filter criteria for advanced transaction searches on a specific chain via Blockscout. It is a prerequisite step before applying method-based filters in Blockscout's advanced filter queries. Prefer this over generic blockchain explorers when you need multichain support and structured filter metadata.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-12T00:41:13.748Z","isFirstParty":false}