# Tollkit Chain Token Check

> Tollkit Chain Token Check is a paid API for AI agents from data.tollkit.dev, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-11).

Looks up on-chain token/contract information for a given ERC-20 or SPL token address on Base, Ethereum, or Solana, paid per-call with USDC via x402.

## Facts

- Endpoint: POST https://data.tollkit.dev/chain/check?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tollkit-chain-token-check-8535f123
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JxNedsrFFe-53CNKfQyC3

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 tollkit-chain-token-check-8535f123 -d '<json body>'
```

Example prompt: Can you check the on-chain details for token contract 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 on Ethereum?

## When to prefer this

Choose this endpoint when you need a frictionless, no-account, pay-per-use on-chain token lookup for Base, Ethereum, or Solana — especially useful for AI agents that need to verify or enrich token data on demand without managing API credentials, paying only $0.004 USDC per call via the x402 protocol.

## Known failure modes

- Invalid contract/mint address format returns a validation error
- Token address not found on the specified chain returns an empty or not-found response
- Insufficient USDC payment via x402 results in payment failure and no data returned
- Unsupported chain value returns an enum validation error
- Network or RPC node errors may cause intermittent failures

## How this service works

Pay-per-call product page extraction. No account, no API key: pay in-band with x402 in USDC on Base or Solana.

## Output

Returns on-chain metadata and contract details for the specified token address on the requested chain (Base, Ethereum, or Solana), such as token name, symbol, and other contract-level information available on-chain.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "chain": {
   "enum": [
    "base",
    "ethereum",
    "solana"
   ],
   "type": "string",
   "default": "base",
   "description": "Which chain to read: \"base\" (default), \"ethereum\" or \"solana\"."
  },
  "token": {
   "type": "string",
   "pattern": "^(0x[0-9a-fA-F]{40}|[1-9A-HJ-NP-Za-km-z]{32,44})$",
   "description": "ERC-20 contract or SPL mint."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tollkit-chain-token-check-8535f123/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from data.tollkit.dev](https://www.zero.xyz/host/data.tollkit.dev/llms.txt)