# Tollkit Chain Transaction Lookup

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

Looks up and returns details for a blockchain transaction by hash on Base, Ethereum, or Solana.

## Facts

- Endpoint: POST https://web.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-f9afda66
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7kVTpm_TgVTvmJKrvayDE

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-f9afda66 -d '<json body>'
```

Example prompt: Can you look up the details for this Base transaction — 0x3a1b2c4d5e6f7a8b9c0d1e2f3a4b5c6d7e8f9a0b1c2d3e4f5a6b7c8d9e0f1a2b — and tell me what happened?

## When to prefer this

Use this endpoint when you need lightweight, pay-per-call on-chain transaction lookups across Base, Ethereum, or Solana without setting up an account or API key. Ideal for agents that need occasional transaction verification or audit without committing to a subscription service. Prefer this over full blockchain node providers when cost per call and zero-setup friction matter most.

## Known failure modes

- Invalid or malformed transaction hash 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. Ethereum hash queried on Solana) returns no result or error
- Payment in USDC via x402 fails or is insufficient, blocking the request
- Network or RPC timeout when fetching from the chain

## 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 data about the specified blockchain transaction, including status, involved addresses, transferred amounts, block details, and any relevant metadata decoded from the transaction.

## 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-f9afda66/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from web.tollkit.dev](https://www.zero.xyz/host/web.tollkit.dev/llms.txt)