# SigmaGrid Registry - Liquidity Signal

> SigmaGrid Registry - Liquidity Signal is a paid API for AI agents from api.sigmagrid.app, paid per call via x402, $0.03/call, status down (last checked 2026-10-12).

Returns real-time quantitative liquidity signals for a given ticker symbol, accessible via x402 micropayment.

## Facts

- Endpoint: POST https://api.sigmagrid.app/v1/liquidity/%7Bticker%7D?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: down
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sigmagrid-registry-liquidity-signal-7f18d10d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_n7WUD94-tPvUr55kNapYx

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 sigmagrid-registry-liquidity-signal-7f18d10d -d '<json body>'
```

Example prompt: Pull the real-time liquidity signal from SigmaGrid for AAPL — I need the quantitative metrics for my algo strategy.

## When to prefer this

Use this endpoint when you need real-time, quantitative liquidity signals for a specific ticker to feed into an algorithmic or quantitative trading strategy and are willing to pay per-call via x402 micropayment. Prefer this over free data sources when signal freshness and quality matter for execution decisions.

## Known failure modes

- Invalid or unrecognized ticker symbol returns a 404 or error response
- Payment not authorized or x402 payment fails resulting in 402 Payment Required
- Ticker market is closed or data unavailable resulting in empty or stale signal
- Rate limiting or quota exceeded returning 429
- Network timeout if signal computation takes too long

## How this service works

Real-time quantitative signals for algorithmic trading, gated via the x402 payment protocol.

## Output

Returns real-time quantitative liquidity signal data for the requested ticker, including liquidity metrics and trading signal values relevant to algorithmic strategies.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sigmagrid-registry-liquidity-signal-7f18d10d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.sigmagrid.app](https://www.zero.xyz/host/api.sigmagrid.app/llms.txt)