# x402 Agentic Token Contract Verifier

> x402 Agentic Token Contract Verifier is a paid API for AI agents from api.x402agentic.ai, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).

Verifies whether a given token contract address is the canonical, legitimate asset (e.g. real USDC, WETH, DAI) rather than a lookalike or spoof contract.

## Facts

- Endpoint: GET https://api.x402agentic.ai/token-check
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-agentic-token-contract-verifier-57cbec5c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_c8YcAEzdl7onLUR8kOd46

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-agentic-token-contract-verifier-57cbec5c
```

Example prompt: Before we proceed with the swap, can you check if the contract address 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 is really the canonical USDC and not a lookalike token?

## When to prefer this

Use this endpoint before any DeFi transaction, token swap, or payment where you need to confirm you are interacting with the real, canonical version of a well-known token rather than a lookalike or fraudulent contract. Especially important for AI agents autonomously handling payments on Base or other EVM chains.

## Known failure modes

- Invalid or malformed contract address returns an error
- Unknown token addresses may return inconclusive results
- Network unavailability returns a service error
- Address not found in canonical registry returns unverified status

## How this service works

Verify a token contract is the canonical asset (real USDC, WETH, DAI…) and not a lookalike or spoof. Part of x402 Agentic, the payment-trust suite for AI agents on Base USDC.

## Output

Returns a verification result indicating whether the queried contract address matches the canonical, official deployment of a known token (USDC, WETH, DAI, etc.), including whether it is a potential spoof or lookalike.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "address": {
       "type": "string",
       "description": "Token contract address to verify"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "valid": true,
  "symbol": "USDC",
  "address": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
  "verdict": "allow",
  "decimals": 6,
  "canonical": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-agentic-token-contract-verifier-57cbec5c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.x402agentic.ai](https://www.zero.xyz/host/api.x402agentic.ai/llms.txt)