# Base Chain Snapshot & Crypto Market Data

> Base Chain Snapshot & Crypto Market Data 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 a live snapshot of the Base mainnet chain (block height, gas price) combined with current prices and 24h changes for BTC, ETH, SOL, and USDC from OKX.

## Facts

- Endpoint: GET https://cryptopulse.pythonanywhere.com/chain/base
- 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/base-chain-snapshot-crypto-market-data-13468ab6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-SiY98DXbOcbGO7t0QlP8

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-chain-snapshot-crypto-market-data-13468ab6
```

Example prompt: What's the current block height and gas price on Base mainnet, and can you also pull the latest BTC, ETH, SOL, and USDC prices with their 24-hour changes?

## When to prefer this

Choose this endpoint when you need a single low-cost call ($0.001 USDC) that bundles both live crypto market prices (BTC, ETH, SOL, USDC from OKX) and Base chain status (block height, gas price) in one response, paid via x402 with no API key or subscription required. Prefer over separate price oracles or chain RPC calls when you want a unified snapshot for a DeFi dashboard, portfolio agent, or market briefing with minimal integration overhead.

## Known failure modes

- HTTP 402 returned if x402 payment header is missing or invalid — must pay 0.001 USDC on Base mainnet and retry with PAYMENT-SIGNATURE header
- Stale or delayed market data if OKX upstream is slow or unavailable
- Base RPC node unavailability causing missing or null chain fields
- Network timeout on pythonanywhere.com free-tier hosting under 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 with three top-level keys: 'chain' (chainId, network name, current block height, gas price in gwei), 'market' (bitcoin, ethereum, solana, usd-coin each with USD price and 24h % change), and 'servedAt' (Unix timestamp of response). No query parameters required.

## 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/base-chain-snapshot-crypto-market-data-13468ab6/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)