# x402 Pulse

> x402 Pulse is a paid API for AI agents from x402-pulse-seller-production.up.railway.app, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-30).

Returns live BTC, ETH, and SOL prices alongside the Crypto Fear & Greed Index in a single API call.

## Facts

- Endpoint: GET https://x402-pulse-seller-production.up.railway.app/pulse?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-pulse-64f08bcd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mPxAf3HPNu2E6dDbMLbTh

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 x402-pulse-64f08bcd
```

Example prompt: What are the current prices for Bitcoin, Ethereum, and Solana, and what does the Crypto Fear & Greed Index say about market sentiment right now?

## When to prefer this

Choose this endpoint when you need BTC, ETH, and SOL prices AND the Fear & Greed Index in a single lightweight call, avoiding the overhead of querying CoinGecko and alternative.me separately. Ideal for agents that need a quick combined crypto market snapshot for dashboards, trading signals, or sentiment monitoring at very low cost ($0.002 per call).

## Known failure modes

- Upstream CoinGecko or alternative.me API unavailable — returns stale or error response
- Payment not processed correctly via x402 protocol — returns 402 Payment Required
- Railway.app hosting downtime — endpoint unreachable
- Rate limit exceeded on underlying public data sources — degraded or missing data

## How this service works

Live BTC/ETH/SOL prices + the Crypto Fear & Greed Index in one call.

## Output

A JSON response containing real-time USD prices for Bitcoin (BTC), Ethereum (ETH), and Solana (SOL) sourced from CoinGecko, plus the current Crypto Fear & Greed Index value and its sentiment label (e.g. Fear, Greed, Extreme Greed) from alternative.me — all in a single combined payload.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "btc_usd": 84638,
  "eth_usd": 2676.4,
  "sol_usd": 119.54,
  "fetched_at": "2026-10-03T06:22:02.173Z",
  "fear_greed_label": "Greed",
  "fear_greed_value": "67",
  "btc_24h_change_pct": -1.59,
  "eth_24h_change_pct": -1.8,
  "sol_24h_change_pct": -1.77
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-pulse-64f08bcd/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-pulse-seller-production.up.railway.app](https://www.zero.xyz/host/x402-pulse-seller-production.up.railway.app/llms.txt)