# CryptoIntel Wallet Check — Base Chain Age, Transaction Count & Balance

> CryptoIntel Wallet Check — Base Chain Age, Transaction Count & Balance is a paid API for AI agents from cryptointel-production.up.railway.app, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-15).

Returns wallet age, transaction count, and balance summary for a given address on the Base blockchain

## Facts

- Endpoint: GET https://cryptointel-production.up.railway.app/wallet-check
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cryptointel-wallet-check-base-chain-age-transaction-count-balance-88dc649f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_evmo3bgLZuz-7Ap31nb0f

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 cryptointel-wallet-check-base-chain-age-transaction-count-balance-88dc649f
```

Example prompt: Can you check how old the wallet 0x1234abcd...5678 is, how many transactions it's made, and what its current balance looks like on Base?

## When to prefer this

Use this endpoint when you need a quick, structured summary of a wallet's on-chain history on Base — specifically age, transaction volume, and balance — without needing a full token holdings breakdown. Prefer this over the portfolio endpoint when you only need activity metadata rather than token exposure detail. Useful for assessing whether a wallet is a fresh/new account or an established one.

## Known failure modes

- Invalid or malformed wallet address returns an error response
- Wallet address not found on Base (no activity) may return empty or zero values
- Network or RPC node issues may cause timeouts
- Missing required 'address' query parameter returns a 400-level error
- Payment not accepted or insufficient USDC balance returns 402

## How this service works

Wallet age, transaction count, and balance summary on Base

## Output

Returns a JSON object with wallet age (first transaction date), total transaction count, and ETH/token balance summary on the Base network, plus an ok status flag and fee_paid confirmation.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "address": "0x1234567890123456789012345678901234567890"
  }
 }
}
```

## 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": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "address": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "ok": {
       "type": "boolean"
      },
      "data": {
       "type": "object"
      },
      "fee_paid": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cryptointel-wallet-check-base-chain-age-transaction-count-balance-88dc649f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from cryptointel-production.up.railway.app](https://www.zero.xyz/host/cryptointel-production.up.railway.app/llms.txt)