# EVM Wallet Token Balances on Base

> EVM Wallet Token Balances on Base is a paid API for AI agents from x402-services-production.up.railway.app, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).

Fetches all token balances for a given 0x EVM wallet address on the Base chain

## Facts

- Endpoint: POST https://x402-services-production.up.railway.app/api/crypto/balances
- 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/evm-wallet-token-balances-on-base-d9e93caf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kJ8Y5Eita9eJcZgFkLdav

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 evm-wallet-token-balances-on-base-d9e93caf -d '<json body>'
```

Example prompt: Can you pull all the token balances for my wallet 0x4f3A2b1c... on Base so I can see what I'm holding right now?

## When to prefer this

Use this endpoint when you need a quick, keyless, pay-per-call lookup of all token balances for a specific EVM wallet on Base. It is ideal for AI agents that need on-chain portfolio snapshots without managing API subscriptions or credentials. Prefer this over centralized exchange balance APIs when the user's assets are on-chain on Base specifically.

## Known failure modes

- Invalid or malformed 0x address returns a validation error
- Address with no token activity may return an empty balance list
- Non-Base EVM addresses (e.g. Ethereum mainnet) may return empty or incorrect results since the endpoint is scoped to Base
- Payment failure or insufficient USDC results in a 402 response and no data returned
- Rate limiting or infrastructure issues on Railway may cause timeouts

## How this service works

Full wallet portfolio: native ETH + all ERC-20 token balances for an address on Base, with amounts. Send { address }. Let agents read any wallet's holdings.

## Output

A list of all token balances held by the specified 0x EVM wallet on the Base chain, including token symbols, contract addresses, and amounts for each asset.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "address"
 ],
 "properties": {
  "address": {
   "type": "string",
   "description": "0x EVM wallet address on Base"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/evm-wallet-token-balances-on-base-d9e93caf/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-services-production.up.railway.app](https://www.zero.xyz/host/x402-services-production.up.railway.app/llms.txt)