# santyvv-data Chain Balance Lookup

> santyvv-data Chain Balance Lookup is a paid API for AI agents from x402.santyvv.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).

Returns the on-chain token or native asset balance for a blockchain address, paid per call in USDC via the x402 protocol.

## Facts

- Endpoint: GET https://x402.santyvv.com/api/chain/balance?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/santyvv-data-chain-balance-lookup-c0046d6f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_G9kth4dyxkn5ARCay2Cyx

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 santyvv-data-chain-balance-lookup-c0046d6f
```

Example prompt: What's the current on-chain balance for wallet address 0xAbCd...1234 on Base?

## When to prefer this

Choose this endpoint when you need keyless, on-demand on-chain balance lookups without setting up an account or API key, and you are willing to pay $0.01 USDC per call via the x402 micropayment protocol. Ideal for agents that need occasional balance checks without committing to a subscription, or when you want normalised multi-chain responses with built-in fallback.

## Known failure modes

- Invalid or malformed wallet address returns an error response
- Unsupported chain identifier results in a 400-level error
- Payment failure via x402 (insufficient USDC or wallet issue) blocks the request
- RPC/data provider outage on all fallback sources may cause a temporary unavailability
- Rate or network issues at the edge cache may introduce stale or delayed data

## How this service works

Market and on-chain data, paid per call in USDC on Base through the x402 protocol. No accounts, no API keys. Sources are public data providers; the value added here is keyless access, edge caching, multi-source fallback and normalised responses.

## Output

A normalised JSON response containing the on-chain balance (amount and token/asset type) for the queried address on the specified chain, sourced from public blockchain data with multi-source fallback and edge caching.

## 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": {}
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/santyvv-data-chain-balance-lookup-c0046d6f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.santyvv.com](https://www.zero.xyz/host/x402.santyvv.com/llms.txt)