# Financial Data x402 — Internal Transactions by Address

> Financial Data x402 — Internal Transactions by Address is a paid API for AI agents from x402financialdata.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).

Returns the list of internal (contract-level) transactions for a given Ethereum address, paid per-call via USDC over the x402 protocol.

## Facts

- Endpoint: GET https://x402financialdata.com/internal-transactions/%7Baddress%7D
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/financial-data-x402-internal-transactions-by-address-9a79f513
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2Ug39NavTG74Kfz1Cb7dl

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 financial-data-x402-internal-transactions-by-address-9a79f513
```

Example prompt: Can you pull up all the internal transactions for Ethereum address 0x2c1ba59d6f58433fb1eaee7d20b26ed83bda51a3? I want to see the contract calls, creation events, and any errors in its on-chain history.

## When to prefer this

Choose this endpoint when you need internal (trace-level) transaction history for an Ethereum address — particularly contract creation events, contract-to-contract calls, and value transfers that don't appear in the standard transaction list. It requires no API key or subscription, making it ideal for agent workflows that pay per call via x402/USDC. Prefer this over Etherscan or similar when you want frictionless, key-free on-chain data access at $0.01 per call.

## Known failure modes

- Invalid or malformed Ethereum address returns an error or empty result
- Address with no internal transactions returns an empty transactions array
- Payment failure over x402 (insufficient USDC balance) results in a 402 Payment Required response
- Network/chain unavailability may result in a 503 or timeout
- Unsupported chain identifiers may return no data

## How this service works

Pay-per-call stock, macro, on-chain, and crypto data over the x402 protocol. USDC on Base or Solana, no API keys, no subscriptions.

## Output

A JSON object containing the queried address, the blockchain name (e.g. 'eth'), a count of results, and an array of internal transactions each with fields: hash, from, to, type (e.g. 'create', 'call'), value in ETH and wei, gas_used, is_error flag, error_code, block_number, and ISO8601 timestamp.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "chain": "eth",
  "count": 1,
  "address": "0x2c1ba59d6f58433fb1eaee7d20b26ed83bda51a3",
  "transactions": [
   {
    "to": null,
    "from": "0x20d42f2e99a421147acf198d775395cac2e8b03d",
    "hash": "0x8a1a9989bda84f80143181a68bc137ecefa64d0d4ebde45dd94fc0cf49e70cb",
    "type": "create",
    "value": 0,
    "gas_used": 46750,
    "is_error": false,
    "timestamp": "2016-10-30T15:08:10+00:00",
    "value_wei": "0",
    "error_code": null,
    "block_number": 2535368
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/financial-data-x402-internal-transactions-by-address-9a79f513/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402financialdata.com](https://www.zero.xyz/host/x402financialdata.com/llms.txt)