# Tollkit Chain Transaction Lookup

> Tollkit Chain Transaction Lookup is a paid API for AI agents from data.tollkit.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-11).

Fetches on-chain transaction details by hash for Base, Ethereum, or Solana networks, paid per-call via x402 in USDC.

## Facts

- Endpoint: POST https://data.tollkit.dev/chain/tx?utm_source=zero.xyz
- Price: $0.002/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-transaction-lookup-042c9c0f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_PfRPvsTYdtIESZ0nxHQD6

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-transaction-lookup-042c9c0f -d '<json body>'
```

Example prompt: Can you look up the Base transaction 0x4a3b2c1d... and tell me what happened — did it go through and what was transferred?

## When to prefer this

Choose this endpoint when you need a pay-as-you-go blockchain transaction lookup with no account or API key setup — ideal for agents that need to verify or audit individual transactions on Base, Ethereum, or Solana without committing to a subscription. Best when the agent already holds USDC on Base or Solana and wants frictionless per-call access.

## Known failure modes

- Invalid transaction hash format returns a validation error
- Transaction hash not found on the specified chain returns a not-found error
- Wrong chain specified for a given hash (e.g. Base hash queried on Solana) returns no result
- Payment failure via x402 (insufficient USDC balance) blocks the call
- Network congestion or RPC downtime may cause timeouts

## 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 structured on-chain transaction data for the specified hash on the chosen chain (Base, Ethereum, or Solana), including transaction status, amounts, sender/receiver addresses, and other chain-native metadata.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "hash": {
   "type": "string",
   "pattern": "^(0x[0-9a-fA-F]{64}|[1-9A-HJ-NP-Za-km-z]{64,88})$",
   "description": "Transaction hash, or base58 signature on Solana."
  },
  "chain": {
   "enum": [
    "base",
    "ethereum",
    "solana"
   ],
   "type": "string",
   "default": "base",
   "description": "Which chain to read: \"base\" (default), \"ethereum\" or \"solana\"."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tollkit-chain-transaction-lookup-042c9c0f/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)