# Crypto Shark Bazaar – Chain Receipt Lookup

> Crypto Shark Bazaar – Chain Receipt Lookup is a paid API for AI agents from cryptoshark.duckdns.org, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-12).

Retrieves blockchain transaction receipt data for a given transaction on the Base network

## Facts

- Endpoint: GET https://cryptoshark.duckdns.org/chain/receipt?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crypto-shark-bazaar-chain-receipt-lookup-5cdbe5bf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TP9wfNk4BebmYMagzNnVu

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 crypto-shark-bazaar-chain-receipt-lookup-5cdbe5bf
```

Example prompt: Can you pull the on-chain receipt for my Base network transaction and tell me when it was observed?

## When to prefer this

Choose this endpoint when you need a low-cost ($0.005 USDC) on-chain receipt lookup specifically on the Base network and are already operating within an x402 micropayment-compatible agent framework. Prefer this over heavier blockchain explorer APIs when you want a lightweight, agent-native primitive without complex authentication overhead.

## Known failure modes

- Missing or malformed transaction properties in the request may return an empty or null response
- Transaction not yet indexed may result in a not-found response
- Network congestion or node unavailability may cause timeouts
- Invalid property format may return a 400-level error
- The DuckDNS dynamic domain may occasionally be unreachable if the host's IP changes

## How this service works

Low-cost x402 blockchain primitives, market intelligence, and AI utilities for autonomous agents

## Output

Returns a JSON object containing the blockchain network (e.g. 'base') and the timestamp at which the transaction was observed (observedAt in ISO 8601 format), along with any additional receipt fields captured at query time.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "network": "base",
  "observedAt": "2026-09-16T00:00:00.000Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/crypto-shark-bazaar-chain-receipt-lookup-5cdbe5bf/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from cryptoshark.duckdns.org](https://www.zero.xyz/host/cryptoshark.duckdns.org/llms.txt)