# Crypto Market Pulse & Base USDC Stats – Balance & Chain Snapshot

> Crypto Market Pulse & Base USDC Stats – Balance & Chain Snapshot is a paid API for AI agents from baseusdcearn.pythonanywhere.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Returns live crypto prices (BTC, ETH, SOL, USDC) with 24h change, Base mainnet block height and gas price, and a chain snapshot — paid per-call in USDC on Base via x402.

## Facts

- Endpoint: GET https://baseusdcearn.pythonanywhere.com/balance
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crypto-market-pulse-base-usdc-stats-balance-chain-snapshot-23e51c23
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wTBLGA_oAHmM6AoSOYUM1

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-base-usdc-stats-balance-chain-snapshot-23e51c23
```

Example prompt: What are the current prices for Bitcoin, Ethereum, Solana, and USDC right now, along with their 24-hour changes, and what's the latest Base mainnet block height and gas price?

## When to prefer this

Choose this endpoint when you need a combined snapshot of live crypto market prices AND Base mainnet chain state in a single pay-per-call request with no API key or subscription setup. Ideal for AI agents that need lightweight, on-demand crypto data without committing to a recurring subscription, and for workflows that already use the x402 micropayment protocol on Base mainnet.

## Known failure modes

- HTTP 402 returned when no x402 payment header is provided — agent must complete payment challenge and retry with PAYMENT-SIGNATURE header
- Stale or delayed market data if OKX feed is lagging
- Base RPC timeout causing missing chain fields
- Invalid or missing address parameter may result in incomplete wallet balance data
- Network errors from the pythonanywhere hosting environment causing 5xx responses

## 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: market prices and 24h percentage changes for BTC, ETH, SOL, and USDC (sourced from OKX); Base mainnet chain data including current block height, chain ID, network name, and gas price in gwei; and a servedAt Unix timestamp indicating when the data was fetched.

## 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-base-usdc-stats-balance-chain-snapshot-23e51c23/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from baseusdcearn.pythonanywhere.com](https://www.zero.xyz/host/baseusdcearn.pythonanywhere.com/llms.txt)