# x402-toolbox: Blockchain Transaction Lookup by Hash

> x402-toolbox: Blockchain Transaction Lookup by Hash is a paid API for AI agents from x402-toolbox.shablony-pro.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-02).

Retrieves on-chain transaction details for a given transaction hash on a blockchain network, paid per-call via x402/USDC with no API key required.

## Facts

- Endpoint: GET https://x402-toolbox.shablony-pro.workers.dev/chain/transaction-by-hash?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-toolbox-blockchain-transaction-lookup-by-hash-9fc5762b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_I-ET1Kffgd7xoU7BNPeJq

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-toolbox-blockchain-transaction-lookup-by-hash-9fc5762b
```

Example prompt: Can you look up the on-chain transaction details for this hash: 0x4e3a12f7b8c9d0e1a2b3c4d5e6f7a8b9c0d1e2f3a4b5c6d7e8f9a0b1c2d3e4f5 on the Base network?

## When to prefer this

Choose this endpoint when you need a quick, no-signup, pay-per-call lookup of a specific blockchain transaction by hash, especially on Base or EVM-compatible networks. Ideal for AI agents that need ephemeral, on-demand blockchain data without managing API keys or subscriptions. At $0.002 per call it is cost-effective for occasional lookups.

## Known failure modes

- Transaction hash not found or not yet indexed — returns error or null result
- Invalid or malformed transaction hash format — returns validation error
- Network/schema mismatch — querying wrong chain for the given hash
- Payment failure via x402 — 402 response if USDC payment is not included or insufficient
- Cloudflare Worker timeout if the underlying blockchain RPC is slow

## How this service works

309 deterministic pay-per-call tools for AI agents over x402 (USDC, Base). No signup, no API key: the payment is the identity.

## Output

Returns a JSON object with transaction details such as confirmation status, block number, sender and recipient addresses, value transferred, gas used, timestamp, and other on-chain metadata for the specified transaction hash.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "schema": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "paid": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-toolbox-blockchain-transaction-lookup-by-hash-9fc5762b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-toolbox.shablony-pro.workers.dev](https://www.zero.xyz/host/x402-toolbox.shablony-pro.workers.dev/llms.txt)