# BTC15 Resolved Feature Sample

> BTC15 Resolved Feature Sample is a paid API for AI agents from xx402.icu, paid per call via x402, $0.01/call, status down (last checked 2026-09-15).

Returns labeled, resolved Bitcoin 15-minute Up/Down prediction-market snapshots with calibration features for model training and evaluation.

## Facts

- Endpoint: GET https://xx402.icu/x402/api/btc15-resolved-feature-sample
- Price: $0.01/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/btc15-resolved-feature-sample-8099eca3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rBKIXEG6fez569BUFkMeg

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 btc15-resolved-feature-sample-8099eca3
```

Example prompt: Fetch up to 8 resolved Bitcoin 15-minute Up/Down market snapshots — give me ones where DOWN won, with 10 snapshots per market, so I can calibrate my prediction model.

## When to prefer this

Choose this endpoint when you need labeled, resolved Bitcoin 15-minute prediction market data with rich feature sets for model calibration, backtesting, or quality auditing. It is specifically designed for quantitative researchers and ML practitioners who need ground-truth outcome labels alongside microstructure snapshots, rather than live price feeds or generic OHLCV data.

## Known failure modes

- Payment not submitted or insufficient USDC balance — 402 response blocking access
- limit parameter out of range (must be 1–12) — validation error
- snapshots_per_market out of range (must be 3–24) — validation error
- winner enum value not in allowed set — validation error
- Upstream data collector unavailable — degraded or empty source_status
- No resolved markets available matching the winner filter — empty labeled_markets array

## How this service works

Paid x402 buyer market scout, x402 paid resource preflight, x402 seller visibility audit, Base actionable risk feed, liquidity exit risk alerts, pool launch risk feed, stable asset risk feed, contract control event feed, protocol outflow risk feed, yield pool allocation risk feed, protocol fee quality feed, token watchlist decision packet, wallet watchlist decision packet, approval risk feed, ranked DeFi review queues with incident history, onchain risk decision packet, promoted token campaign decision packet, large transfer decision packet, token candidate screening decision radar, DEX pair anomaly decision radar, wallet safety decision packet, counterparty flow, allowance, approval exposure, DEX pair routing risk, token trade safety, token liquidity, token flow, holder concentration, contract controls, batch token screening decision packets, token diligence, and BTC15 prediction-market microstructure, execution-friction, calibration-slice, recent market tape, resolved feature sample, and threshold-pressure packets for agents and risk tools.

## Output

A JSON object containing a summary, feature_sample_decision, labeled_markets (resolved BTC 15-minute Up/Down markets with final-window snapshots), a feature_dictionary describing each feature, a quality_summary, source_status, and sources list. Each labeled market includes resolution outcome (UP or DOWN) and multiple price/microstructure snapshots from the final window.

## Response schema (JSON Schema)

```json
{
 "keys": [
  "summary",
  "feature_sample_decision",
  "labeled_markets",
  "feature_dictionary",
  "quality_summary",
  "source_status",
  "sources"
 ],
 "type": "json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/btc15-resolved-feature-sample-8099eca3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from xx402.icu](https://www.zero.xyz/host/xx402.icu/llms.txt)