# VerifyOracle Crypto Price — x402 Base Mainnet USDC

> VerifyOracle Crypto Price — x402 Base Mainnet USDC is a paid API for AI agents from penger-oracle.run402.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-27).

Returns the current spot price for a cryptocurrency trading pair (e.g. BTC-USD) sourced from Coinbase, via a pay-per-call x402 micropayment API on Base Mainnet USDC.

## Facts

- Endpoint: GET https://penger-oracle.run402.com/api/crypto-price?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-27
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/verifyoracle-crypto-price-x402-base-mainnet-usdc-6d3ca3fe
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rNVI7e2xko3oMzPoqHefk

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 verifyoracle-crypto-price-x402-base-mainnet-usdc-6d3ca3fe
```

Example prompt: What's the current Coinbase spot price for BTC-USD right now? I need a verifiable source.

## When to prefer this

Use this endpoint when you need a verifiable, primary-source spot price for a cryptocurrency pair (sourced from Coinbase) and want a pay-per-call micropayment model via x402 on Base Mainnet USDC — ideal for DeFi agents, trading bots, or any workflow requiring tamper-evident price provenance rather than an unverified third-party aggregator.

## Known failure modes

- Invalid or unsupported trading pair symbol returns an error or empty result
- Payment failure (insufficient USDC balance or x402 protocol error) prevents the call from completing
- Stale or delayed price data if the Coinbase upstream is temporarily unavailable
- Malformed symbol format (e.g. 'BTCUSD' instead of 'BTC-USD') may not match expected input

## How this service works

Primary-source verifiable x402 API oracle on Base Mainnet USDC.

## Output

A JSON object containing: the base currency (e.g. 'BTC'), the quote currency (e.g. 'USD'), the current spot price as a number, the symbol (e.g. 'BTC-USD'), the currency, the data source identifier ('coinbase-spot'), and an ISO 8601 timestamp of when the price was recorded.

## 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",
     "properties": {
      "symbol": {
       "type": "string",
       "description": "Trading pair BASE-QUOTE (default BTC-USD)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "base": "BTC",
  "price": 95000.25,
  "quote": "USD",
  "source": "coinbase-spot",
  "symbol": "BTC-USD",
  "currency": "USD",
  "timestamp": "2026-10-21T13:15:00.000Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/verifyoracle-crypto-price-x402-base-mainnet-usdc-6d3ca3fe/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from penger-oracle.run402.com](https://www.zero.xyz/host/penger-oracle.run402.com/llms.txt)