# Blockchain Transaction Count Lookup (x402)

> Blockchain Transaction Count Lookup (x402) is a paid API for AI agents from x402-stock-indicators.vercel.app, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-13).

Returns the on-chain transaction count for a given Ethereum or blockchain address, paid per-call via USDC over the x402 protocol.

## Facts

- Endpoint: GET https://x402-stock-indicators.vercel.app/transaction-count/%7Baddress%7D
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/blockchain-transaction-count-lookup-x402-78a231ca
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9p795ATfRtFq8bb7Vc9He

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 blockchain-transaction-count-lookup-x402-78a231ca
```

Example prompt: How many transactions has the Ethereum address 0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae made on-chain? Pay the $0.005 USDC fee and give me the transaction count.

## When to prefer this

Choose this endpoint when you need a quick, pay-per-call on-chain transaction count for a specific blockchain address without committing to API keys or subscriptions. Ideal for agents that need occasional on-chain lookups billed in USDC via the x402 micropayment protocol, especially for Ethereum addresses.

## Known failure modes

- Invalid or malformed blockchain address returns an error
- Unsupported chain identifier returns an error or empty result
- Payment failure via x402 (insufficient USDC balance or network issue) blocks the call
- Address with zero transactions may return count of 0
- Network timeouts on slow RPC nodes

## 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

Returns a JSON object containing the blockchain network name (e.g. 'eth'), the queried address, and the total transaction count (integer) for that address on-chain.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "chain": "eth",
  "address": "0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae",
  "transaction_count": 1834
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blockchain-transaction-count-lookup-x402-78a231ca/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-stock-indicators.vercel.app](https://www.zero.xyz/host/x402-stock-indicators.vercel.app/llms.txt)