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WalCert Multichain Wallet Certificate
x402
WalCert Multichain Wallet Certificate is a paid API for AI agents from walcert.globalscoreagent.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).
Grades an EVM wallet's cross-chain footprint and on-chain longevity across multiple EVM networks, returning a signed A-F certificate.
Price / call$0.05
Success—
StatusUnknown
How this service works
Grade a wallet's chain footprint and longevity A-F across EVM networks. POST wallet_address; signed certificate. $0.05 USDC.
Output
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.
Example use cases
Vetting a counterparty before payment
“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?”
Due diligence on a new DeFi partner
“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?”
Screening a freelancer's crypto wallet
“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?”
Technical details
Endpoint
POSThttps://walcert.globalscoreagent.com/v1/certificates/multichainWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| wallet_address | string | EVM wallet address (0x-prefixed, 42 chars) |
Tags
x402
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