# Crypto Market Pulse – Wallet Balance & Chain Snapshot

> Crypto Market Pulse – Wallet Balance & Chain Snapshot is a paid API for AI agents from cryptopulse.pythonanywhere.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Returns live USDC/ETH wallet balances and nonce for any address, alongside Base mainnet chain stats and BTC/ETH/SOL/USDC market prices, paid per-call in USDC on Base via x402.

## Facts

- Endpoint: GET https://cryptopulse.pythonanywhere.com/balance
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crypto-market-pulse-wallet-balance-chain-snapshot-cfee41ff
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kANb7WcqjCp7skU5Uu9vx

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 crypto-market-pulse-wallet-balance-chain-snapshot-cfee41ff
```

Example prompt: What's the current USDC and ETH balance for wallet 0xAbC...123 on Base mainnet, and what are BTC, ETH, and SOL trading at right now with their 24-hour changes?

## When to prefer this

Choose this endpoint when an AI agent needs a single combined call for wallet balance checks (USDC + ETH), on-chain nonce, Base network status, and live crypto market prices — all without API key signup. Ideal for keyless, pay-per-call DeFi agents that settle in USDC on Base. Prefer over separate RPC and price feed calls when minimizing integration complexity and when the x402 micropayment model fits the workflow.

## Known failure modes

- HTTP 402 returned if x402 payment header is missing or invalid — must pay 0.001 USDC on Base and retry with PAYMENT-SIGNATURE header
- Invalid or malformed wallet address returns an error or empty balance fields
- Base RPC node temporarily unavailable causing chain/balance data gaps
- OKX market feed delay or downtime causing stale or missing price data
- Rate limiting or PythonAnywhere hosting constraints under high load

## How this service works

Pay-per-call API for AI agents, settled in USDC on Base mainnet (eip155:8453) via the x402 protocol - no API keys, no signup, no subscription. Live crypto market data: BTC, ETH, SOL, USDC (USD Coin) prices with 24h change (source: OKX), Base mainnet chain snapshot (block height, gas price gwei), real-time USDC-on-Base transfer analytics (transfer count, volume, unique senders and recipients over recent blocks), and USDC/ETH wallet balances plus nonce for any address. Agent utility tools: deterministic JSON repair for LLM output (strip code fences, fix trailing commas, single quotes, unquoted keys, balance braces), DNS A/AAAA lookup, and URL extraction from arbitrary text. Every endpoint returns HTTP 402 with an x402 payment challenge in USDC on Base; pay with any wallet and retry with the PAYMENT-SIGNATURE header. MCP server at /mcp (streamable HTTP, 6 pay-per-call tools). Ideal for crypto portfolios, DeFi dashboards, market analysis agents, data pipelines, and LLM post-processing.

## Output

A JSON object containing: wallet USDC and ETH balances plus nonce for the queried address; Base mainnet chain snapshot (block height, gas price in gwei); and live market prices for BTC, ETH, SOL, and USDC with 24-hour percentage change. All data is real-time from OKX and Base RPC.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "chain": {
   "chainId": 8453,
   "network": "base-mainnet",
   "blockHeight": 21000000,
   "gasPriceGwei": 0.05
  },
  "market": {
   "solana": {
    "usd": 150,
    "usd_24h_change": -0.5
   },
   "bitcoin": {
    "usd": 60000,
    "usd_24h_change": 1.5
   },
   "ethereum": {
    "usd": 3000,
    "usd_24h_change": 2
   },
   "usd-coin": {
    "usd": 1,
    "usd_24h_change": 0
   }
  },
  "servedAt": 1755430000
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/crypto-market-pulse-wallet-balance-chain-snapshot-cfee41ff/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from cryptopulse.pythonanywhere.com](https://www.zero.xyz/host/cryptopulse.pythonanywhere.com/llms.txt)