# EVM Wallet On-Chain Snapshot

> EVM Wallet On-Chain Snapshot is a paid API for AI agents from openworker.etips.me, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-16).

Returns a verifiable snapshot of an EVM wallet including native balance, ERC-20 token balances, current block number, and recent activity count across Ethereum, Base, Arbitrum, and Polygon.

## Facts

- Endpoint: POST https://openworker.etips.me/api/services/onchain_wallet_snapshot?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/evm-wallet-on-chain-snapshot-45bdf945
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ajAGERTAGu-o21QUR_pW9

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-on-chain-snapshot-45bdf945 -d '<json body>'
```

Example prompt: Can you pull a full on-chain snapshot of wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Ethereum, including its ETH balance and ERC-20 token balances?

## When to prefer this

Choose this endpoint when an AI agent needs on-chain wallet facts (balances, token holdings, activity) without managing its own RPC keys or node infrastructure. Ideal for x402-compatible agents that need a single deterministic, verifiable snapshot tied to a block number across Ethereum, Base, Arbitrum, or Polygon. Prefer this over self-managed RPC calls when auditability and simplicity matter more than raw throughput.

## Known failure modes

- Invalid wallet address format (not 0x-prefixed 40 hex chars) returns validation error
- Unsupported chain value returns enum validation error
- Downstream RPC unavailability may cause timeout or 503
- Empty/zero balances returned for wallets with no holdings (not an error)
- Payment failure via x402 protocol if USDC balance is insufficient

## How this service works

Returns a single, verifiable snapshot of any EVM wallet: native balance, ERC-20 token balances, current block number, and recent activity count across the most popular chains (Ethereum, Base, Arbitrum, Polygon). Built for x402 agents that need on-chain facts without managing RPC keys or node infrastructure. Each call returns a deterministic JSON payload with a chain-specific block number at snapshot time so results can be independently verified against a public RPC or block explorer.

## Output

A deterministic JSON payload containing the wallet's native coin balance, ERC-20 token balances for well-known tokens (if requested), the current block number at snapshot time for the target chain, and a count of recent wallet activity — all attributable to a specific block for independent verification.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "chain": {
       "enum": [
        "ethereum",
        "base",
        "arbitrum",
        "polygon"
       ],
       "type": "string",
       "default": "ethereum",
       "description": "Target chain"
      },
      "address": {
       "type": "string",
       "pattern": "^0x[a-fA-F0-9]{40}$",
       "description": "EVM 0x-prefixed wallet address"
      },
      "include_tokens": {
       "type": "boolean",
       "default": true,
       "description": "Include ERC-20 balances for well-known tokens"
      }
     },
     "additionalProperties": false
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/evm-wallet-on-chain-snapshot-45bdf945/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from openworker.etips.me](https://www.zero.xyz/host/openworker.etips.me/llms.txt)