# Soren ERC-20 Balance Reader

> Soren ERC-20 Balance Reader is a paid API for AI agents from soren.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).

Returns the ERC-20 token balance for a given wallet address on Base mainnet, including symbol, decimals, and a human-formatted amount — in a single call with no ABI work required.

## Facts

- Endpoint: GET https://soren.com/v1/chain/erc20-balance
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/soren-erc-20-balance-reader-72401455
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kNOaesQ5KONcdMrUXGNg8

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 soren-erc-20-balance-reader-72401455
```

Example prompt: What's the current USDC balance for wallet 0xaDc3A47EFbD82Ed724a0E9A3D08D5A1A8e6586fd? The USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 — give me the formatted amount, symbol, and decimals.

## When to prefer this

Choose this endpoint when you need a live, formatted ERC-20 balance from Base mainnet in a single call without writing or parsing ABI code. It is ideal for agents that need quick, human-readable token balances (symbol + formatted amount) without setting up a full Web3 stack. For attested/oracle-grade reads with cryptographic proof, use the sibling /v1/oracle/onchain endpoint instead.

## Known failure modes

- Invalid ERC-20 contract address returns an error or zero data
- Invalid holder address format causes a request error
- Non-ERC-20 contract address (e.g. EOA or non-standard contract) may return unexpected results
- Base mainnet node unavailability causes a read failure
- Payment (x402) failure results in no charge and no data returned
- Token contract with non-standard decimals may return unexpected formatted amounts

## How this service works

Read an ERC-20 balance with symbol, decimals and a formatted amount — one call, no ABI work, live from Base mainnet, for a fraction of a cent. No API key, no account — a wallet is the only requirement, and you are charged only if the read succeeds. Plain unsigned data; the attested version of chain reads is /v1/oracle/onchain. Answers are read at the moment of the call and stamped with the block they came from where applicable.

## Output

Returns the ERC-20 token balance for the specified holder address, including: raw balance, human-formatted amount (adjusted for decimals), token symbol, token decimals, and the block number at which the balance was read. Returns a not-found or zero-balance result if the address holds none of the token.

## Request schema (JSON Schema)

```json
{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "token",
      "address"
     ],
     "properties": {
      "token": {
       "type": "string",
       "examples": [
        "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
       ],
       "description": "The ERC-20 contract address."
      },
      "address": {
       "type": "string",
       "examples": [
        "0xaDc3A47EFbD82Ed724a0E9A3D08D5A1A8e6586fd"
       ],
       "description": "The holder address."
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/soren-erc-20-balance-reader-72401455/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from soren.com](https://www.zero.xyz/host/soren.com/llms.txt)