# Synapse BTC Price

> Synapse BTC Price is a paid API for AI agents from anibalb.duckdns.org, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-31).

Returns the current Bitcoin (BTC) price in USD

## Facts

- Endpoint: GET https://anibalb.duckdns.org/x402/btc-price?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-btc-price-3e565555
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0PrUNKZ8QRP3vFDoUxBkq

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 synapse-btc-price-3e565555
```

Example prompt: What's the current Bitcoin price in USD right now?

## When to prefer this

Choose this endpoint when you need a quick, keyless, pay-per-call Bitcoin price lookup without setting up an account or API key. Ideal for AI agents operating on the Base blockchain using x402 micropayments, where cost per call ($0.001 USDC) is acceptable and the simplicity of no authentication is valued. Best for real-time single BTC/USD spot price queries rather than historical data or multi-coin batch pricing.

## Known failure modes

- Payment failure if USDC balance is insufficient or x402 payment is not properly attached
- Stale or delayed price data if upstream data provider is lagging
- HTTP 402 returned if payment header is missing
- Service unavailable if the duckdns host or upstream is down
- No price returned if coin identifier is mismatched

## How this service works

Public data and utility APIs paid per call in USDC on Base (x402). No accounts, no API keys. 174 routes: crypto/equity data, onchain reads, DNS/email/security intel, geo/weather, x402 payment diagnostics, dev utilities and more.

## Output

A JSON object containing the coin name ('bitcoin') and its current price in USD as a numeric value, e.g. {"coin": "bitcoin", "price_usd": 60000}.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "coin": "bitcoin",
  "price_usd": 60000
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synapse-btc-price-3e565555/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from anibalb.duckdns.org](https://www.zero.xyz/host/anibalb.duckdns.org/llms.txt)