# Delx Base Transaction Lookup

> Delx Base Transaction Lookup is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).

Look up a Base blockchain transaction by hash via live JSON-RPC, optionally including the transaction receipt.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/base-tx
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-base-transaction-lookup-642b4f4e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_p2SmJ1gucFw7_Ijr4TsTW

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 delx-base-transaction-lookup-642b4f4e -d '<json body>'
```

Example prompt: Can you look up the Base transaction with hash 0x3a4f...d91c and include the receipt so I can see whether it was confirmed and how much gas was used?

## When to prefer this

Choose this endpoint when you need to look up a specific Base (Coinbase L2) transaction by hash and want structured on-chain data returned without managing your own RPC node or API keys. It is ideal for agents that need to verify payment confirmations, audit transaction details, or inspect receipts on Base, especially in x402-compatible micropayment workflows where per-call billing ($0.001 USDC) is preferred over subscriptions.

## Known failure modes

- Transaction hash not found — returns null or error if the hash does not exist on Base
- Invalid hash format — malformed hash causes a JSON-RPC parse error
- Network or RPC timeout — live JSON-RPC call may fail if the Base node is unreachable
- Transaction pending — receipt unavailable if the transaction has not yet been mined
- Payment failure — call not executed if x402 USDC micropayment of $0.001 is not accepted

## How this service works

Look up a Base transaction by hash (optional receipt) for $0.001 USDC via live JSON-RPC. Call when you need this bounded result without an API key or subscription. Returns machine-readable JSON via x402 on Base or Solana. Limitation: results cover only the supplied input or one bounded public endpoint at request time; callers must verify before acting.

## Output

Returns structured on-chain transaction data from Base via JSON-RPC, including transaction hash, block number, sender, recipient, value, gas price, gas limit, input data, and optionally the transaction receipt with gas used, status (success/fail), logs, and contract address if applicable.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {},
  "tool_name": "get_base_transaction"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-base-transaction-lookup-642b4f4e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.delx.ai](https://www.zero.xyz/host/api.delx.ai/llms.txt)