{"uid":"cap_eI3R_RzbdZhsOW1M_8glX","slug":"walcert-multichain-wallet-certificate-06ccfaa7","name":"WalCert Multichain Wallet Certificate","description":"Grade a wallet's chain footprint and longevity A-F across EVM networks. POST wallet_address; signed certificate. $0.05 USDC.","url":"https://walcert.globalscoreagent.com/v1/certificates/multichain","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"wallet_address":{"type":"string","description":"EVM wallet address (0x-prefixed, 42 chars)"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","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":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_k4hk59y0c4q32B1MS7sQQ","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Grades an EVM wallet's cross-chain footprint and on-chain longevity across multiple EVM networks, returning a signed A-F certificate.","exampleAgentPrompt":"Can you get me a signed multichain certificate grading the chain footprint and longevity of wallet 0x742d35Cc6634C0532925a3b8D4C9B7e8e3d1Ac44 across EVM networks?","exampleUseCases":[{"title":"Vetting a counterparty before payment","prompt":"Before I send funds to 0xAbC123...def456, can you pull a multichain footprint certificate so I can see how established and active that wallet actually is across EVM chains?"},{"title":"Due diligence on a new DeFi partner","prompt":"We're about to do a joint liquidity provision with a wallet — can you get a signed A-F grade on 0x1a2b3c4d5e6f7a8b9c0d1e2f3a4b5c6d7e8f9a0b's cross-chain history so we can assess their credibility?"},{"title":"Screening a freelancer's crypto wallet","prompt":"I need to pay a contractor in crypto but want to make sure they're legit — can you grab a multichain longevity certificate for their wallet 0xDEAD...BEEF and tell me what grade they get?"}],"resultDescription":"A signed certificate object containing an A-F grade reflecting the wallet's cross-chain footprint breadth (number and diversity of EVM networks active on) and longevity (age and continuity of on-chain activity). The certificate is cryptographically signed, suitable for audit or verification purposes.","failureModes":["Invalid or malformed wallet address (not 0x-prefixed or not 42 characters) returns a 400 error","Wallet with zero on-chain history may return an F grade with minimal data","Payment failure or insufficient USDC balance prevents certificate issuance","Unsupported or unrecognized EVM address format causes rejection","Rate limiting or service unavailability returns 429 or 503"],"whenToPreferThis":"Choose this endpoint when you need a cross-chain view of a wallet's on-chain presence and tenure rather than a single-chain snapshot. Prefer it over the activity or portfolio sibling endpoints when the key question is 'how long and how broadly has this wallet been active across EVM ecosystems?' — especially useful for counterparty due diligence where longevity and multichain breadth signal legitimacy.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:36:55.046Z","isFirstParty":false}