{"uid":"cap_JTLP-O_N-q6B6RlutX_cg","slug":"address-label-base-address-identifier-bfe53fee","name":"Address Label (Base Address Identifier)","description":"What is this Base address? Matches a sourced registry of known protocol, exchange, bridge, locker and burn addresses (each with the docs/deployments/Basescan source it came from), then reads the chain: contract vs EOA (EIP-7702 delegation shown), ERC-4626 vault (asset()), Safe multisig (getThreshold), DEX pool interface (token0/token1). Unmatched addresses are reported as unlabelled, never guessed.","url":"https://402.com.tr/api/x402/address-label?utm_source=zero.xyz","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"],"type":"string"},"pathParams":{"type":"object"},"queryParams":{"type":"object","required":["address"],"properties":{"address":{"type":"string","description":"Base address to identify"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_XRqClC1a_5k2aNnj9zHOY","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Identifies a Base blockchain address by matching it against a curated registry of known protocols, exchanges, bridges, lockers, and burn addresses, then enriches it with on-chain reads for contract type, ERC-4626 vault, Safe multisig, and DEX pool details.","exampleAgentPrompt":"Can you tell me what this Base address is — 0x4200000000000000000000000000000000000006? I want to know if it's a known protocol, exchange, vault, or multisig, and what type of contract it is.","exampleUseCases":[{"title":"Identify unknown address in transaction","prompt":"I just received a transfer from 0x3fC91A3afd70395Cd496C647d5a6CC9D4B2b7FAD on Base — can you tell me what that address is, whether it's a known protocol or exchange, and what type of contract it is?"},{"title":"Audit DEX pool token composition","prompt":"Can you look up Base address 0xd0b53D9277642d899DF5C87A3966A349A798F224 and tell me if it's a DEX pool, and if so what token pair it holds?"},{"title":"Verify Safe multisig before sending funds","prompt":"Before I send funds, can you check if 0xBEEF...1234 on Base is a Safe multisig and what its threshold is?"}],"resultDescription":"Returns a structured label for the queried Base address including: matched entity name and category (protocol, exchange, bridge, locker, burn) with source documentation if known; on-chain classification as contract or EOA (with EIP-7702 delegation if applicable); ERC-4626 vault underlying asset if applicable; Safe multisig threshold if applicable; DEX pool token0/token1 if applicable; or a clear 'unlabelled' status if unmatched — no guessing.","failureModes":["Address not in registry and not a recognizable on-chain type — returned as 'unlabelled' with no label guessed","Invalid or malformed address string — likely returns an error or empty result","RPC read failure for on-chain data — partial result or error response","Address is valid but on a chain other than Base — may return unlabelled or incorrect result","Rate limiting or payment failure for the x402 micropayment — request blocked"],"whenToPreferThis":"Choose this endpoint when you need a reliable, sourced label for a Base address and want on-chain type enrichment (vault, multisig, DEX pool, EIP-7702 delegation) in a single call. Prefer it over generic block explorers when you need structured, machine-readable output rather than a human-readable page, or when you need to distinguish contract subtypes programmatically. Ideal for agent pipelines doing transaction monitoring, compliance checks, or user-facing address annotation on Base.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-15T12:30:18.060Z","isFirstParty":false,"canonicalSlug":"address-label-base-address-identifier-bfe53fee"}