# USDC-on-Base Chain Snapshot & Crypto Market Prices

> USDC-on-Base Chain Snapshot & Crypto Market Prices is a paid API for AI agents from cryptopulse.pythonanywhere.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Returns a real-time snapshot of Base mainnet chain state (block height, gas price) alongside live BTC, ETH, SOL, and USDC spot prices with 24h change, paid per-call in USDC via x402.

## Facts

- Endpoint: GET https://cryptopulse.pythonanywhere.com/usdc-stats
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/usdc-on-base-chain-snapshot-crypto-market-prices-2f10076d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3RWWN4QRD1f1E5dbK60pT

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 usdc-on-base-chain-snapshot-crypto-market-prices-2f10076d
```

Example prompt: What are the current prices for Bitcoin, Ethereum, Solana, and USDC, and what's the latest block height and gas price on Base mainnet right now?

## When to prefer this

Choose this endpoint when you need a single lightweight call that combines live crypto spot prices (BTC, ETH, SOL, USDC) with Base chain state (block height, gas price) and you want pay-per-call billing in USDC with no API key or subscription. Prefer it over CoinGecko or similar when operating in a crypto-native agent context that already handles x402 micropayments on Base.

## Known failure modes

- HTTP 402 returned if x402 payment not attached — requires PAYMENT-SIGNATURE header with valid USDC payment on Base
- Stale market data if OKX upstream is delayed or rate-limited
- Base RPC unavailability may cause missing or outdated block height and gas price
- Network errors to pythonanywhere.com hosting may return 5xx
- Invalid or unparseable x402 payment signature returns 402 with error detail

## 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: a `chain` object with Base mainnet chainId, network name, current block height, and gas price in gwei; a `market` object with USD spot prices and 24h percentage changes for bitcoin, ethereum, solana, and usd-coin; 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/usdc-on-base-chain-snapshot-crypto-market-prices-2f10076d/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)