# Ambolt Base Transaction Lookup

> Ambolt Base Transaction Lookup is a paid API for AI agents from api.ambolt.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-11).

Fetches confirmed on-chain transaction details from the Base mainnet by transaction hash

## Facts

- Endpoint: GET https://api.ambolt.dev/v1/base-transaction?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ambolt-base-transaction-lookup-1a45343a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tG9fQBh3CNNlxX6TTwcug

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 ambolt-base-transaction-lookup-1a45343a
```

Example prompt: Can you look up Base transaction 0x423b365ff9be27a347e7bacc7f0ead3f299ac3587dbb36c516d1e81b99c7217d and tell me whether it succeeded, who sent it, and how much ETH was transferred?

## When to prefer this

Use this endpoint when you need authoritative, confirmed on-chain facts about a specific Base mainnet transaction — especially for verifying payment receipt, auditing gas consumption, or extracting token transfer details. Prefer this over general blockchain explorers when you need a structured JSON response suitable for agent pipelines, or when you need to pay per-call without API key setup.

## Known failure modes

- Invalid hash format (must be 0x followed by 64 hex characters) returns a validation error
- Transaction hash not found on Base mainnet returns found: false
- RPC node temporarily unavailable causes a service error
- Passing an Ethereum mainnet hash instead of a Base hash returns not found or wrong data

## How this service works

Pay-per-call data tools for developers and AI agents: company registers, documents, tenders, rates and on-chain facts as MCP tools, x402 endpoints and Apify Actors.

## Output

A JSON object containing full transaction details from Base mainnet: confirmation status (found/success), sender and recipient addresses, ETH value transferred (in ETH and Wei), gas used, effective gas price, block number and timestamp, nonce, chain ID, log count, any token transfers, contract creation address if applicable, method selector, and a source attribution note. Includes a checkedAt timestamp.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "POST"
     ]
    },
    "queryParams": {
     "type": "object",
     "required": [
      "hash"
     ],
     "properties": {
      "hash": {
       "type": "string",
       "pattern": "^0x[0-9a-fA-F]{64}$",
       "description": "Transaction hash on Base."
      }
     },
     "additionalProperties": false
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "to": "0x4200000000000000000000000000000000000015",
  "from": "0xdeaddeaddeaddeaddeaddeaddeaddeaddead0001",
  "hash": "0x423b365ff9be27a347e7bacc7f0ead3f299ac3587dbb36c516d1e81b99c7217d",
  "found": true,
  "nonce": 52093799,
  "feeEth": "0",
  "source": "Source: Base mainnet RPC (confirmed chain state). Facts only; not advice.",
  "status": "success",
  "chainId": 8453,
  "gasUsed": "46218",
  "network": "base",
  "logCount": 0,
  "valueEth": "0",
  "valueWei": "0",
  "blockTime": "2026-10-02T21:35:39.000Z",
  "checkedAt": "2026-10-02T21:35:40.765Z",
  "blockNumber": 52093796,
  "methodSelector": "0x3db6be2b",
  "tokenTransfers": [],
  "contractCreated": null,
  "effectiveGasPriceGwei": 0
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ambolt-base-transaction-lookup-1a45343a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.ambolt.dev](https://www.zero.xyz/host/api.ambolt.dev/llms.txt)