# Obol Cardano Transaction Lookup

> Obol Cardano Transaction Lookup is a paid API for AI agents from obol.danieldutoit.net, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).

Fetches verified details for a specific Cardano mainnet transaction by its transaction hash.

## Facts

- Endpoint: GET https://obol.danieldutoit.net/v1/cardano/transaction
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/obol-cardano-transaction-lookup-1c278c8a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JvsdlAGN0KFC6C7VyXGCL

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 obol-cardano-transaction-lookup-1c278c8a
```

Example prompt: Can you look up the Cardano mainnet transaction with hash a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0 and tell me whether it was found and what its details are?

## When to prefer this

Use this endpoint when you need verified, on-chain Cardano transaction data by exact transaction hash on mainnet. Prefer this over generic blockchain explorers when you need a paid, programmatic, API-accessible result settled via x402/USDC — especially in automated agent workflows that require a structured JSON response rather than a web scrape. Not suitable for Ethereum, Bitcoin, or other non-Cardano chains.

## Known failure modes

- Transaction hash not found — returns found: false with transaction: null
- Invalid or malformed transaction hash — may return an error or not-found response
- Network unavailability — service may be temporarily unreachable
- Payment failure — x402 USDC payment on Base not settled, request blocked
- Hash exists on a different Cardano network (testnet vs mainnet) — returns not found

## How this service works

Obol sells verified blockchain data over x402, settled in USDC on Base.

## Output

Returns a JSON object indicating whether the transaction was found on Cardano mainnet, the network identifier ('cardano-mainnet'), coverage metadata including match type ('exact_transaction_hash') and maximum results (1), the queried transaction hash, and a 'transaction' field containing full transaction details if found or null if not found.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "found": false,
  "network": "cardano-mainnet",
  "coverage": {
   "match_type": "exact_transaction_hash",
   "maximum_results": 1
  },
  "transaction": null,
  "transaction_hash": "a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/obol-cardano-transaction-lookup-1c278c8a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from obol.danieldutoit.net](https://www.zero.xyz/host/obol.danieldutoit.net/llms.txt)