# Crypto Shark Bazaar – Chain Transaction Lookup

> Crypto Shark Bazaar – Chain Transaction Lookup is a paid API for AI agents from cryptoshark.duckdns.org, paid per call via x402, $0.008/call, status unknown (last checked 2026-10-11).

Retrieves blockchain transaction data and on-chain primitives for a given transaction on the Base network via x402-gated GET request

## Facts

- Endpoint: GET https://cryptoshark.duckdns.org/chain/transaction?utm_source=zero.xyz
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crypto-shark-bazaar-chain-transaction-lookup-588952ed
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_husCVRLeRahK3b0pZ-UCZ

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-transaction-lookup-588952ed
```

Example prompt: Can you look up the on-chain details for a transaction on the Base network and tell me what happened — the network it was on and when it was observed?

## When to prefer this

Choose this endpoint when you need low-cost, x402-gated on-chain transaction lookups on the Base network for autonomous agent workflows, particularly when paying per-call in USDC is acceptable and you need raw blockchain primitives rather than a full-featured block explorer API.

## Known failure modes

- Missing or malformed transaction properties parameter returns an error or empty result
- Transaction not found on the specified network returns null or empty data
- Payment not processed (x402 402 response) if USDC payment fails
- DuckDNS hostname may be temporarily unavailable leading to connection timeouts
- Rate limiting or quota exhaustion may return 429 errors

## 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 name (e.g. 'base') and an ISO 8601 timestamp of when the transaction was observed on-chain, along with any available transaction primitives.

## 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-transaction-lookup-588952ed/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)