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x402 Trust & Discovery API — Onchain Token Lookup
x402
x402 Trust & Discovery API — Onchain Token Lookup is a paid API for AI agents from gkyf2bs3b4p35hwwg5zzsnejeu.srv.us, paid per call via x402, $0.001/call, status down (last checked 2026-10-01).
Returns onchain data for an ERC-20 token contract address on Base, without requiring payment credentials
Price / call$0.001
Success—
StatusDown
How this service works
Independent pre-purchase safety and reputation checks for x402 and MPP endpoints, plus keyless onchain data on Base. Accepts BOTH EIP-3009 and Circle Gateway credentials — only 141 of 788 Base-payable resources do, and a single-credential buyer is locked out of 53.8% of this market on one rail or 28.3% on the other. GET /v1/guard?url=&credential= answers whether the credential you carry can pay a given endpoint at all, before you try. Searching this market for "is this API endpoint a scam" returns registries and explorers but no dedicated service; that gap is what /v1/guard fills, inspecting an endpoint WITHOUT paying it and returning a go / test-with-minimum / do-not-pay verdict backed by onchain settlement history.
Output
Returns onchain data for the specified ERC-20 token contract on Base, likely including token name, symbol, decimals, total supply, and other contract-level metadata available without authentication or payment.
Example use cases
Verify token contract before paying
“Before I pay an x402 endpoint that charges in some token, can you pull the onchain details for the contract at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base so I know what I'm actually dealing with?”
Identify unknown token in wallet
“I see an unknown token in my Base wallet with contract address 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb — can you fetch its onchain data so I can figure out what it is?”
Audit token used by API marketplace
“I'm building an agent that pays x402 APIs and I need to verify the token contract 0x2Ae3F1Ec7F1F5012CFEab0185bfc7aa3cf0DEc22 on Base is a legitimate ERC-20 — can you grab the raw onchain info for it?”
Technical details
Endpoint
GEThttps://gkyf2bs3b4p35hwwg5zzsnejeu.srv.us/v1/onchain/token?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need keyless, no-credential onchain token data for a Base ERC-20 contract — particularly in x402/MPP agent workflows where you want to verify a payment token before committing a transaction. Prefer this over direct RPC calls when you want a simple HTTP GET interface without managing a Web3 provider.
Side effects
- Invalid or malformed contract address returns an error
- Contract address does not exist on Base network
- Address is a wallet address rather than a token contract
- Network or RPC unavailability causes timeout
- Contract exists but is not a standard ERC-20, returning partial or empty data
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| address | string | ERC-20 contract address on Base. |
Output
Schema · Response
{
"type": "json",
"example": {}
}Tags
x402
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