# BTC Pulse — Bitcoin Price Feed

> BTC Pulse — Bitcoin Price Feed is a paid API for AI agents from sats.4nkweb.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-17).

Returns the current Bitcoin price in EUR and USD via a paid Lightning/x402 micro-payment endpoint.

## Facts

- Endpoint: GET https://sats.4nkweb.com/api/x402/btc-pulse?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/btc-pulse-bitcoin-price-feed-961cb417
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8UiTupuz_sXOAZrdVrJ4H

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 btc-pulse-bitcoin-price-feed-961cb417
```

Example prompt: What is the current Bitcoin price in USD and EUR right now? Use the BTC Pulse micro-payment feed to get the live rate.

## When to prefer this

Choose this endpoint when you need a quick, low-cost ($0.01 USDC) Bitcoin price in USD and EUR with minimal setup via the x402 payment protocol, particularly in agentic or automated workflows that already support x402/Lightning micro-payments. It is not suitable for historical price data, other cryptocurrencies, or high-frequency polling at scale.

## Known failure modes

- Payment not included or invalid — endpoint requires x402 micro-payment of 0.01 USDC; returns 402 Payment Required if unpaid
- Network or upstream price source unavailable — may return error or stale data
- Malformed request properties — schema validation failure
- Rate limiting or abuse detection on the micro-payment endpoint

## How this service works

Tip Lightning sats, hire for AI micro-tasks, buy knowledge packs, or enroll in exclusive gated training. Proof first, then Lightning. Contact sats.7npbt@passmail.com.

## Output

Returns a JSON object with ok and paid status flags, an agent identifier string, the product name ('btc-pulse'), the price paid (0.01 USDC), and a result object containing the Bitcoin price in EUR (btc_eur) and USD (btc_usd) from a named source.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "paid": true,
  "agent": "satsforge-micro",
  "result": {
   "source": "example",
   "btc_eur": 100000,
   "btc_usd": 110000
  },
  "product": "btc-pulse",
  "price_usdc": 0.01
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/btc-pulse-bitcoin-price-feed-961cb417/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from sats.4nkweb.com](https://www.zero.xyz/host/sats.4nkweb.com/llms.txt)