# StableJack Market Performance API

> StableJack Market Performance API is a paid API for AI agents from ai.stable-jack.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-13).

Retrieves market performance metrics for crypto assets via StableJack's agent-ready research API.

## Facts

- Endpoint: POST https://ai.stable-jack.com/x402/tools/market_performance
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/stablejack-market-performance-api-2503d2d3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ugd7Eq5w1TrRbMjwaXidX

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 stablejack-market-performance-api-2503d2d3 -d '<json body>'
```

Example prompt: Pull up the market performance data for Bitcoin from StableJack's research API so I can see how BTC has been doing recently.

## When to prefer this

Choose this endpoint when an AI agent needs structured, agent-ready market performance data for crypto assets — particularly perpetuals and DeFi tokens — and needs it in a format optimized for programmatic consumption. Prefer this over generic price APIs when research-grade performance metrics (not just spot price) are required, or when building trading research workflows that need reliable, monetized data access via x402.

## Known failure modes

- Invalid or unsupported asset symbol returns an error
- Missing required parameters (e.g. scope or target) results in a 400-level response
- Payment not processed correctly results in authorization failure
- Rate limiting may occur under high request volume
- Stale or unavailable market data may return partial results

## How this service works

Retrieve market performance through StableJack's agent-ready research API.

## Output

Returns structured market performance data for the requested crypto assets or markets, including price-based performance metrics, return statistics, and comparative indicators sourced from StableJack's research data layer.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/stablejack-market-performance-api-2503d2d3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ai.stable-jack.com](https://www.zero.xyz/host/ai.stable-jack.com/llms.txt)