{"uid":"cap_1BPYAL5iiCrOrZlUvGTND","slug":"24k-labs-crypto-address-validator-8a90e4b2","name":"24K Labs Crypto Address Validator","description":"A curated directory of x402 services — each one on the list on purpose, with the health, uptime, and independent trust grades from across the ecosystem gathered in one place.","url":"https://api.24klabs.ai/api/crypto-address-validate","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"address":{"type":"string"}}},"responseSchema":{"type":"json","example":{"chain":"evm","valid":true,"checksum_valid":true}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_YAItCM7SVg9_1DyNsDJd5","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates a cryptocurrency address for correctness, checksum validity, and chain type (e.g. EVM)","exampleAgentPrompt":"Can you check if this wallet address is valid and has a correct checksum: 0x742d35Cc6634C0532925a3b844Bc454e4438f44e?","exampleUseCases":[{"title":"Pre-transfer address sanity check","prompt":"Before I send crypto to 0x742d35Cc6634C0532925a3b844Bc454e4438f44e, can you verify it's a valid EVM address with a correct checksum so I don't lose funds?"},{"title":"User input validation in a dApp","prompt":"A user just typed in the address 0xAbCd1234EfGh5678 in my app's send field — can you check whether it's a properly formatted and checksummed EVM address?"},{"title":"Bulk payout list audit","prompt":"I have a recipient address 0x1234567890abcdef1234567890abcdef12345678 from my payout spreadsheet — validate it for me to make sure it's a real EVM address with a valid checksum before I queue the payment."}],"resultDescription":"Returns a JSON object indicating the detected chain (e.g. 'evm'), whether the address is syntactically valid (valid: true/false), and whether the checksum is correct (checksum_valid: true/false).","failureModes":["Malformed or empty address input returns valid: false","Non-EVM chain addresses may return unsupported chain type or invalid","Network timeout results in no response","Invalid JSON body causes 4xx error"],"whenToPreferThis":"Choose this endpoint when you need a fast, cheap ($0.003 USDC) programmatic check of a crypto address's format and checksum validity before executing a transaction or storing an address — especially for EVM-compatible chains. Prefer it over manual regex checks or on-chain lookups when you only need structural/format validation without a live blockchain query.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T19:02:29.404Z","isFirstParty":false}