# SableForge Address Balance Lookup

> SableForge Address Balance Lookup is a paid API for AI agents from sableforge.servehttp.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-12).

Looks up ETH and USDC token balances for a given blockchain wallet address on Base, paid per-call in USDC via x402.

## Facts

- Endpoint: GET https://sableforge.servehttp.com/api/addr?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sableforge-address-balance-lookup-d7a1487f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zrb1-_9Ahp1rmlQi_6dF9

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 sableforge-address-balance-lookup-d7a1487f
```

Example prompt: What are the current ETH and USDC balances for the wallet address 0xabc123... on Base?

## When to prefer this

Choose this endpoint when you need a lightweight, no-signup balance lookup for a wallet address on Base and are already operating in an x402 micropayment context. It is ideal for autonomous agents that need to check their own treasury or a counterparty's wallet balance programmatically without setting up traditional API credentials.

## Known failure modes

- Invalid or malformed address returns an error response
- Address with no onchain activity may return zero balances
- Payment failure via x402 (insufficient USDC) blocks the request
- Network downtime on Base may cause stale or failed lookups
- Non-Base-network addresses may not resolve correctly

## How this service works

12 pay-per-call HTTP APIs settled in USDC on Base via x402 v2. No API keys, no accounts, no signup — $0.0005–$0.0020 per call. Includes a locally hosted 27B LLM endpoint.

## Output

Returns a JSON object containing the ETH balance, USDC balance, and the queried wallet address (e.g. {eth: 1.2, usdc: 34.5, address: '0xabc'}).

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "addr": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "eth": 1.2,
  "usdc": 34.5,
  "address": "0xabc"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sableforge-address-balance-lookup-d7a1487f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from sableforge.servehttp.com](https://www.zero.xyz/host/sableforge.servehttp.com/llms.txt)