# Base Wallet Brief — Crypto Market Pulse

> Base Wallet Brief — Crypto Market Pulse is a paid API for AI agents from agentkit-x402-buy.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-16).

Returns a snapshot of key crypto market metrics (BTC/ETH prices, fear & greed index) on the Base network via a micropayment-gated GET endpoint.

## Facts

- Endpoint: GET https://agentkit-x402-buy.vercel.app/api/market-pulse
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/base-wallet-brief-crypto-market-pulse-6e244d90
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4hcJNfshiTdcHdBKv5lhG

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 base-wallet-brief-crypto-market-pulse-6e244d90
```

Example prompt: Can you pull the current Bitcoin and Ethereum prices along with the crypto fear and greed index right now? Just a quick Base network market snapshot — no account needed.

## When to prefer this

Choose this endpoint when you need a fast, no-account-required crypto market snapshot (BTC price, ETH price, fear & greed index) and are already operating on the Base network with a USDC wallet capable of x402 micropayments. Ideal for AI agents that need lightweight, real-time market context without integrating a full exchange API or managing API keys.

## Known failure modes

- Payment not received or insufficient USDC balance — returns 402 Payment Required
- Invalid or malformed format query param — may return 400 Bad Request
- Upstream market data source unavailable — may return 503 or stale data
- Network congestion on Base causing payment confirmation delay

## How this service works

Instant Base wallet health brief. Pay $0.50 USDC via x402. No account.

## Output

A JSON object containing the seller's wallet address, current BTC/USD price, current ETH/USD price, the Base network identifier (eip155:8453), and the crypto fear & greed index (0–100 scale).

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "format": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "seller": "0xEb76f3442EAF192EBdDbc1F7EeBD59CdE5e00D35",
  "btc_usd": 64000,
  "eth_usd": 3500,
  "network": "eip155:8453",
  "fear_greed": 27
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/base-wallet-brief-crypto-market-pulse-6e244d90/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentkit-x402-buy.vercel.app](https://www.zero.xyz/host/agentkit-x402-buy.vercel.app/llms.txt)