# Ralph Crypto Summary API – Wallet Profile

> Ralph Crypto Summary API – Wallet Profile 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 2026-10-13).

Returns a holdings summary and transaction profile for a given EVM wallet address on the Base blockchain, paid per-call via x402 USDC.

## Facts

- Endpoint: GET https://ralph-crypto-summary.simgokr.workers.dev/api/wallet-profile?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ralph-crypto-summary-api-wallet-profile-6ab8d4db
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TRVBB1f2qM0ukM6Jg-NaV

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-profile-6ab8d4db
```

Example prompt: Can you pull up the wallet profile for 0x4a9f3b4d5e6c7a8b9c0d1e2f3a4b5c6d7e8f9012 on Base — I want to see what tokens it holds and the total USD value?

## When to prefer this

Choose this endpoint when you need a quick, pay-per-call on-chain wallet profile for a Base network EVM address — particularly when you want token holdings with USD valuations and account-type classification without setting up your own blockchain node or indexer. Ideal for agents that need occasional wallet lookups rather than bulk or streaming data, and where the low $0.05/call x402 micropayment model is preferred over subscription APIs.

## Known failure modes

- Invalid or malformed EVM address returns an error (non-0x or wrong length)
- Address not found on Base or zero activity returns empty holdings array
- Payment not completed via x402 results in 402 Payment Required response
- Rate limiting or Cloudflare Worker timeout may return 5xx errors
- Base RPC/data source downtime may cause stale or missing data

## 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 wallet address, an array of token holdings (each with symbol, balance, and USD value), the account type (externally_owned or contract), the number of outgoing transactions, and a total USD portfolio estimate.

## 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": "0x...",
  "holdings": [
   {
    "symbol": "USDC",
    "balance": 10.15,
    "usd_value": 10.15
   }
  ],
  "account_type": "externally_owned",
  "outgoing_tx_count": 12,
  "total_usd_estimate": 10.15
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ralph-crypto-summary-api-wallet-profile-6ab8d4db/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)