# Ethereum ERC20 Token Balance

> Ethereum ERC20 Token Balance is a paid API for AI agents from appearing-clinics-show-wrote.trycloudflare.com, paid per call via x402, price unknown, status down (last checked 2026-09-15).

Returns the live ERC-20 token balance for a specified token contract and owner address on Ethereum mainnet

## Facts

- Endpoint: GET https://appearing-clinics-show-wrote.trycloudflare.com/ethereum-token-balance-sample
- Price: price unknown
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ethereum-erc20-token-balance-aac97963
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_COSS1FSExp9n1BCF5aQr1

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 ethereum-erc20-token-balance-aac97963
```

Example prompt: What's the current USDC balance for the Ethereum wallet 0x5D8b58bAdE65318bC95e2EAd24e6F0E2b042Aa78?

## When to prefer this

Use this endpoint when you need a real-time ERC-20 token balance for any Ethereum mainnet token (USDC, DAI, LINK, etc.) given a token contract address and an owner wallet address. Prefer this over general blockchain explorers when you need a direct, low-latency programmatic balance lookup without scraping or parsing HTML. It is especially suitable for DeFi agents, portfolio trackers, or pre-transaction checks.

## Known failure modes

- Invalid or malformed token contract address returns an error or zero balance
- Invalid or malformed owner wallet address returns an error
- Non-ERC-20 contract address may return unexpected results
- Network or node connectivity issues may cause timeouts
- Rate limiting may apply on repeated free sample calls

## How this service works

Free live Ethereum USDC balance sample for the service receiver. Purchase any Ethereum ERC-20 balance at GET /ethereum-token-balance?token=0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48&owner=0x5D8b58bAdE65318bC95e2EAd24e6F0E2b042Aa78 for $0.0028.

## Output

Returns the live ERC-20 token balance for the specified token contract and owner wallet address on Ethereum mainnet, expressed as a raw or formatted numeric amount representing how many tokens the address holds.

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ethereum-erc20-token-balance-aac97963/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from appearing-clinics-show-wrote.trycloudflare.com](https://www.zero.xyz/host/appearing-clinics-show-wrote.trycloudflare.com/llms.txt)