# x402 Trust & Discovery API — Onchain Token Lookup

> 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 2026-10-03).

Returns onchain data for an ERC-20 token contract address on Base, without requiring payment credentials

## Facts

- Endpoint: GET https://gkyf2bs3b4p35hwwg5zzsnejeu.srv.us/v1/onchain/token?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: down
- Last checked: 2026-10-03
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-trust-discovery-api-onchain-token-lookup-9822f900
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZlTxz2k3krVhYJnUYBHan

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability x402-trust-discovery-api-onchain-token-lookup-9822f900
```

Example prompt: Can you look up the onchain token data for the ERC-20 contract at address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base?

## When to prefer this

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.

## Known failure modes

- 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

## 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.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "address": {
   "type": "string",
   "description": "ERC-20 contract address on Base."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {}
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-trust-discovery-api-onchain-token-lookup-9822f900/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from gkyf2bs3b4p35hwwg5zzsnejeu.srv.us](https://www.zero.xyz/host/gkyf2bs3b4p35hwwg5zzsnejeu.srv.us/llms.txt)