# Agent Tape – Transaction Receipt Lookup

> Agent Tape – Transaction Receipt Lookup is a paid API for AI agents from agent-tape.annushka1190.workers.dev, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-14).

Fetches a transaction receipt for a given tx hash on Base, returning on-chain confirmation status and details, paid per-request via USDC x402.

## Facts

- Endpoint: GET https://agent-tape.annushka1190.workers.dev/v1/tx
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-tape-transaction-receipt-lookup-3bf19315
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_InobfdpLbSDXrtqXHXcof

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 agent-tape-transaction-receipt-lookup-3bf19315
```

Example prompt: Can you check whether my Base transaction 0x4a3b...c9f1 went through successfully and tell me how much gas it used?

## When to prefer this

Use this endpoint when you need a pay-per-request, no-signup way to look up a Base network transaction receipt. Ideal for AI trading agents that already use Agent Tape for DEX data and want a unified, x402-native interface without managing API keys. Prefer over general-purpose RPC calls when you want a simple REST GET with USDC micropayment.

## Known failure modes

- Transaction hash not found or not yet mined — returns error or empty receipt
- Invalid or malformed tx hash format — likely 400-level error
- Transaction still pending — receipt not yet available
- Network or RPC downtime for Base — upstream failure
- Payment failure via x402 if USDC balance is insufficient

## How this service works

Live DEX tape for AI trading agents: search pairs, token price and liquidity, pair lookup, boosts, paid DexScreener orders, Base ETH/USDC balance, nonce, contract check, gas, and tx receipt. Pay-per-request USDC via x402. No API keys, no accounts.

## Output

Returns a JSON object with ok:true and the transaction receipt fields such as status (success/failure), block number, gas used, logs, and other standard EVM receipt fields for the given tx hash on Base.

## 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": {
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ]
    },
    "queryParams": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-tape-transaction-receipt-lookup-3bf19315/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent-tape.annushka1190.workers.dev](https://www.zero.xyz/host/agent-tape.annushka1190.workers.dev/llms.txt)