{"uid":"cap_NW_JR3XxVBT1eyeVfil1F","slug":"delx-eip-55-checksum-verifier-592edfa6","name":"Delx EIP-55 Checksum Verifier","description":"Check whether an address already matches its EIP-55 checksum form — call when verifying an address already matches EIP-55 form. Use for chain input hygiene without live RPC—adjacent to OneSource-class small chain reads, but static/local only so rights and margin stay clear. Returns deterministic machine-readable JSON for $0.003 USDC via x402 on Base. Execution is first-party, local-only, stateless, and memory-only with no paid upstream, no input retention, and no claim of live chain tip, web se…","url":"https://api.delx.ai/api/v1/x402/eip55-check","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"address":{"type":"string","description":"EVM address (40 hex chars, optional 0x)."}}},"responseSchema":{"type":"json","example":{"valid":true,"schema":"delx/util-eip55-check/v1","expected":"0x95222290DD7278Aa3Ddd389Cc1E1d165CC4BAfe5","algorithm":"keccak256","is_checksummed":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_9gzm9iIhsviihYLw272oM","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":"Checks whether a given EVM address already matches its EIP-55 mixed-case checksum form, returning a deterministic boolean result without any live RPC call","exampleAgentPrompt":"Can you check whether 0x742d35Cc6634C0532925a3b844Bc454e4438f44e is already in valid EIP-55 checksum form?","exampleUseCases":[{"title":"Pre-submission address hygiene check","prompt":"Before I submit this transfer, verify that the destination address 0xAbCdEf0123456789AbCdEf0123456789AbCdEf01 is already correctly checksummed in EIP-55 format."},{"title":"Wallet input validation in a dApp pipeline","prompt":"I have a user-entered address 0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae — can you confirm whether it already matches its EIP-55 checksum so I know if I need to re-encode it?"},{"title":"Batch pipeline quality gate for address lists","prompt":"I'm processing a list of EVM addresses and need to flag any that aren't already in EIP-55 form — start by checking 0x5aAeb6053F3E94C9b9A09f33669435E7Ef1BeAed for me."}],"resultDescription":"A deterministic JSON response indicating whether the provided EVM address already matches its EIP-55 mixed-case checksum encoding — no live chain data, purely local computation. The response is machine-readable and suitable for use as a boolean gate in pipelines.","failureModes":["Invalid or malformed address string (wrong length, non-hex characters) — likely returns an error or validation failure JSON","Missing required address field — returns a schema validation error","Address with incorrect length (not 40 hex chars) — rejected before checksum logic runs"],"whenToPreferThis":"Choose this endpoint when you need a fast, stateless, offline EIP-55 checksum verification with no RPC dependency, no rate limits from a node provider, and no side effects. It is ideal for input hygiene pipelines, smart contract address validation, and pre-flight checks where you only need to know if the address is already correctly checksummed — not to convert or correct it.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T18:59:35.791Z","isFirstParty":false}