# x402 Crypto Research API – BTC Brief

> x402 Crypto Research API – BTC Brief is a paid API for AI agents from x402-research-iota.vercel.app, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-29).

Returns a pay-per-call Bitcoin market brief including price, RSI, moving averages, trend signal, and sentiment data

## Facts

- Endpoint: GET https://x402-research-iota.vercel.app/api/brief/btc?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-crypto-research-api-btc-brief-73aecc39
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_amvI71csCVCk9nAE4b_wE

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-crypto-research-api-btc-brief-73aecc39
```

Example prompt: Can you pull me a quick Bitcoin brief — current price, RSI, trend signal, and fear & greed index?

## When to prefer this

Choose this endpoint when you need a compact, all-in-one Bitcoin market snapshot including technicals (RSI, SMAs), trend signals, and sentiment (fear & greed index) in a single cheap call ($0.03 USDC). Prefer it over general market data APIs when you want pre-computed trend classification and sentiment bundled together without assembling multiple data sources yourself.

## Known failure modes

- Payment not completed or x402 authorization fails — endpoint returns 402 Payment Required
- Upstream price/sentiment data provider is unavailable — may return stale or error response
- Malformed request or unsupported asset path — returns 404 or 400
- Network timeout from Vercel serverless cold start — retry typically resolves

## How this service works

Pay-per-call BTC/ETH briefs via x402

## Output

A JSON object containing BTC's current price, 14-day RSI, 20-day and 50-day simple moving averages, a trend score and signal label (e.g. 'neutral'), RSI state, sentiment classification, fear & greed index value, 24-hour and 7-day percentage price changes, and an informational disclaimer.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "asset": "BTC",
  "price": 80631.35,
  "rsi14": 43.71,
  "sma20": 82531.74,
  "sma50": 81794.82,
  "trend": {
   "score": -1,
   "signal": "neutral",
   "rsiState": "neutral"
  },
  "sentiment": {
   "classification": "Neutral",
   "fearGreedIndex": 51
  },
  "disclaimer": "Informational only, not financial advice.",
  "change7dPct": -0.92,
  "change24hPct": -0.55
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-crypto-research-api-btc-brief-73aecc39/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-research-iota.vercel.app](https://www.zero.xyz/host/x402-research-iota.vercel.app/llms.txt)