{"uid":"cap_6zMDd2wBvd6XJxvexfWMC","slug":"delx-address-checksum-evm-a45fe148","name":"Delx Address Checksum EVM","description":"Produce or validate an EIP-55 checksummed EVM address without network calls — call when producing or checking EIP-55 checksum addresses. 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 ti…","url":"https://api.delx.ai/api/v1/x402/address-checksum-evm","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-address-checksum-evm/v1","algorithm":"keccak256","matches_input":true,"checksum_address":"0x95222290DD7278Aa3Ddd389Cc1E1d165CC4BAfe5"}},"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_z-3RqO2lUbPMxf23Oaw41","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":"Produces or validates an EIP-55 checksummed EVM address locally and deterministically, with no network calls or live chain data.","exampleAgentPrompt":"Can you produce the EIP-55 checksummed version of this EVM address: 0xd3cda913deb6f0967b57ab6e59b1c17802c2e76a?","exampleUseCases":[{"title":"Pre-submission address hygiene","prompt":"Before I send this transaction, can you checksum validate 0xab5801a7d398351b8be11c439e05c5b3259aec9b to make sure it's properly EIP-55 formatted?"},{"title":"Normalize raw hex from user input","prompt":"A user just pasted this address in all lowercase: d3cda913deb6f0967b57ab6e59b1c17802c2e76a — can you give me back the properly checksummed EIP-55 version so I can store it correctly?"},{"title":"Smart contract address validation","prompt":"I have this smart contract address 0xBE0eB53F46cd790Cd13851d5EFf43D12404d33E8 — verify it already has the correct EIP-55 checksum and tell me if it passes."}],"resultDescription":"Returns a deterministic JSON object containing the EIP-55 checksummed form of the input EVM address and a validation status indicating whether the original input already matched the correct checksum.","failureModes":["Invalid address format — non-hex characters or wrong length returns an error","Address not 40 hex chars after stripping 0x prefix causes rejection","Completely missing address field returns a schema validation error","Malformed JSON input body causes a 400 bad request","Payment not included or insufficient USDC via x402 returns a 402 response"],"whenToPreferThis":"Choose this endpoint when you need fast, cheap, stateless EIP-55 address formatting or validation with no RPC dependency — ideal for input sanitization pipelines, smart contract address normalization, and pre-transaction hygiene checks where live chain data is unnecessary. Prefer this over on-chain or RPC-based address tools when you want zero latency, no external API rate limits, and deterministic output for a fixed $0.003 per call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T19:02:56.119Z","isFirstParty":false}