# OmniAPI Crypto Address Transaction Lookup

> OmniAPI Crypto Address Transaction Lookup is a paid API for AI agents from omni-api-cyan.vercel.app, paid per call via x402, $0.047775/call, status unknown (last checked 2026-09-15).

Retrieves the transaction history for a given blockchain address across supported chains

## Facts

- Endpoint: POST https://omni-api-cyan.vercel.app/api/crypto/address/transactions
- Price: $0.047775/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/omniapi-crypto-address-transaction-lookup-3d7a0f2d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZRgaod1c6IrngoPydYp6o

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 omniapi-crypto-address-transaction-lookup-3d7a0f2d -d '<json body>'
```

Example prompt: Can you pull up the full transaction history for the Ethereum wallet 0x742d35Cc6634C0532925a3b8D4C9C1F3b1d4e5f2 — I want to see all sends and receives on that address.

## When to prefer this

Use this endpoint when you need to retrieve on-chain transaction history for a specific blockchain address across one or more of OmniAPI's supported chains. It is particularly useful for agents that need to audit wallet activity, verify payments, or investigate on-chain behavior without setting up a direct node connection or indexer. Choose this over building a custom blockchain query when you want pay-per-call simplicity via x402 USDC micropayments.

## Known failure modes

- Invalid or malformed address returns an error or empty result
- Unsupported chain or address format may yield no transactions
- Rate limiting or payment failure via x402 results in a 402 Payment Required response
- Network or provider downtime may cause timeouts or 500 errors
- Address with no transaction history returns an empty list

## How this service works

444 endpoints across 9+ chains. Crypto, AI, Social, Finance, Weather, Tools. Pay per call in USDC via x402 with 4 facilitators: Dexter, Meridian, FluxA, GoPlausible.

## Output

Returns a structured object containing the list of transactions associated with the queried blockchain address, including details such as transaction hashes, block numbers, timestamps, sender and receiver addresses, token amounts, and transaction statuses across supported chains.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "query"
 ],
 "properties": {
  "input": {
   "type": "string",
   "description": "Input data for the endpoint"
  },
  "query": {
   "type": "string",
   "description": "Search query or input text"
  },
  "params": {
   "type": "object",
   "description": "Additional parameters"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "description": "API response data"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/omniapi-crypto-address-transaction-lookup-3d7a0f2d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from omni-api-cyan.vercel.app](https://www.zero.xyz/host/omni-api-cyan.vercel.app/llms.txt)