# Crypto Market Pulse & Base USDC Stats — Price by Symbol

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

Returns live cryptocurrency price and 24-hour change for a given symbol (BTC, ETH, SOL, USDC), alongside Base mainnet chain stats, paid per-call in USDC via x402.

## Facts

- Endpoint: GET https://baseusdcearn.pythonanywhere.com/crypto/price/%7Bsymbol%7D
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-09
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crypto-market-pulse-base-usdc-stats-price-by-symbol-0556c116
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cwkRz30Gb5S7gCIt6NyTp

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-price-by-symbol-0556c116
```

Example prompt: What's the current price of Bitcoin and its 24-hour change, along with the latest Base mainnet gas price and block height?

## When to prefer this

Choose this endpoint when you need a no-signup, no-API-key, pay-per-call source of live crypto prices (BTC, ETH, SOL, USDC) combined with Base mainnet chain stats in a single call, billed in microtransactions of $0.001 USDC via x402. Ideal for AI agents, DeFi dashboards, and data pipelines that need autonomous, wallet-based payment without subscription overhead.

## Known failure modes

- HTTP 402 returned if x402 payment challenge is not satisfied — agent must pay in USDC on Base and retry with PAYMENT-SIGNATURE header
- Invalid or unsupported symbol returns an error or empty market data
- Upstream OKX or Base RPC downtime may cause stale or missing data
- Malformed symbol path parameter may result in a 404 or unexpected response
- Network latency on PythonAnywhere free tier may occasionally cause timeouts

## 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: live USD price and 24h change for the queried crypto symbol (sourced from OKX), Base mainnet chain snapshot (block height, gas price in gwei), USDC-on-Base transfer analytics (transfer count, volume, unique senders/recipients), and a servedAt Unix timestamp.

## 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-price-by-symbol-0556c116/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)