# Ralph Crypto Summary API – Wallet Summary

> Ralph Crypto Summary API – Wallet Summary is a paid API for AI agents from ralph-crypto-summary.simgokr.workers.dev, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-12).

Returns ETH and USDC balances for a given Base network EVM wallet address, paid per-call via x402 micropayments in USDC.

## Facts

- Endpoint: GET https://ralph-crypto-summary.simgokr.workers.dev/api/wallet-summary?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ralph-crypto-summary-api-wallet-summary-9897ac38
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pfeKUUQX8cRjC2MhYuM9W

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 ralph-crypto-summary-api-wallet-summary-9897ac38
```

Example prompt: Can you pull up the ETH and USDC balances for the Base wallet 0x2E0c897CA643189948c5AF25eE27876DC788B4c6?

## When to prefer this

Choose this endpoint when you need a quick, on-demand balance snapshot for a specific Base network EVM address and are comfortable with micropayment-gated access via x402/USDC. Ideal for agents that already operate in the Base/USDC ecosystem and need lightweight wallet data without running a full node or managing an RPC subscription.

## Known failure modes

- Invalid or malformed EVM address returns an error response
- Payment failure via x402 (insufficient USDC, wrong network) blocks the call
- Address not found on Base returns zero balances rather than an error
- Network congestion on Base may cause stale or delayed balance data
- Missing required 'address' query parameter results in a 400-level error

## How this service works

Pay-per-call crypto market and Base wallet summaries via x402 (USDC on Base).

## Output

A JSON object containing the queried EVM wallet address, the network (Base), a timestamp, the ETH balance as a decimal string, and the USDC balance as a decimal string.

## 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": [
      "address"
     ],
     "properties": {
      "address": {
       "type": "string",
       "description": "EVM address on Base (0x + 40 hex)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "address": "0x2E0c897CA643189948c5AF25eE27876DC788B4c6",
  "network": "base",
  "timestamp": "2026-09-19T00:00:00.000Z",
  "eth_balance": "0.000000",
  "usdc_balance": "10.11"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ralph-crypto-summary-api-wallet-summary-9897ac38/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ralph-crypto-summary.simgokr.workers.dev](https://www.zero.xyz/host/ralph-crypto-summary.simgokr.workers.dev/llms.txt)