{"uid":"cap_A6TQAH8EH_7Gt4ztPRPY6","slug":"eip-55-ethereum-address-checksum-validator-1b990687","name":"EIP-55 Ethereum Address Checksum & Validator","description":"EIP-55 checksum an Ethereum address, and check one — Genesis402 / UnyKorn Operator Network","url":"https://twin.unykorn.org/eth-checksum-address?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"params":{"type":"object","properties":{"address":{"type":"string"}}}}},"responseSchema":{"type":"json","example":{"ok":true,"type":"eth-checksum-address","receipt":{"tx_hash":"0x<64hex>","amount_usd":0.001,"receipt_id":"g402-<16hex>"},"generated_at":"<iso8601>"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_tqf-xdrwEgczpHnMy6SGI","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Applies EIP-55 mixed-case checksumming to an Ethereum address and validates whether a given address already has a correct checksum","exampleAgentPrompt":"Can you checksum this Ethereum address for me: 0x5aaeb6053f3e94c9b9a09f33669435e7ef1beaed — I need the properly EIP-55 formatted version.","exampleUseCases":[{"title":"Normalize address before on-chain transfer","prompt":"Before I send ETH to this address, can you apply the EIP-55 checksum so I know it's the correct canonical form: 0xd8da6bf26964af9d7eed9e03e53415d37aa96045?"},{"title":"Validate user-submitted wallet address","prompt":"A user submitted this Ethereum address in our form: 0xFb6916095ca1df60bB79Ce92cE3Ea74c37c5d359 — can you tell me whether the checksum is correct?"},{"title":"Prepare address for smart contract deployment config","prompt":"I'm putting together a config file for a smart contract and need the properly checksummed EIP-55 version of this address: 0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae"}],"resultDescription":"Returns a JSON object indicating success, the checksummed or validation result for the provided Ethereum address, along with a receipt containing a transaction hash, USD amount paid, and a unique receipt ID for the pay-per-call transaction.","failureModes":["Invalid or malformed Ethereum address returns an error response","Non-hex or non-40-character address strings rejected","Payment failure via x402 protocol results in 402 response before processing","Network or upstream service unavailability may return 5xx errors"],"whenToPreferThis":"Choose this endpoint when you need a pay-per-call, API-accessible EIP-55 checksum operation without running your own Ethereum library — especially useful in agent workflows where address normalization is a discrete step and you want an auditable receipt for each call. Prefer it over local computation when you need verifiable, receipted operations on the UnyKorn network.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T18:55:23.037Z","isFirstParty":false,"canonicalSlug":"eip-55-ethereum-address-checksum-validator-1b990687"}