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SigmaGrid Registry – Spread Signal
x402
SigmaGrid Registry – Spread Signal is a paid API for AI agents from api.sigmagrid.app, paid per call via x402, $0.02/call, status down (last checked 2026-10-12).
Returns a real-time quantitative spread signal for a given ticker, gated via the x402 micropayment protocol for algorithmic trading use.
Price / call$0.02
Success—
StatusDown
How this service works
Real-time quantitative signals for algorithmic trading, gated via the x402 payment protocol.
Output
Returns a real-time quantitative spread signal for the requested ticker, likely including spread value, timestamp, and related microstructure metrics useful for algorithmic trading decisions. Each call costs $0.02 USDC via x402 payment.
Example use cases
Optimize market-making spreads in real-time
“Check the live spread signal for SPY on SigmaGrid and tell me if I should tighten or widen my quotes right now.”
Feed algo strategy with live microstructure data
“Grab the latest quantitative spread metrics for QQQ from SigmaGrid so my momentum bot can adjust its entry positions.”
Monitor spread conditions across index components
“Give me the current spread signals from SigmaGrid for the top 5 holdings in my portfolio so I can assess liquidity before executing any large orders.”
Technical details
Endpoint
POSThttps://api.sigmagrid.app/v1/spread/%7Bticker%7D?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need real-time spread or microstructure signals for a specific ticker to feed into an algorithmic or quantitative trading system. Best suited for agents executing per-call micropayment workflows via x402 where low per-query cost ($0.02 USDC) matters. Prefer over REST market data aggregators when the x402 pay-per-call model fits your agent's architecture.
Side effects
- Invalid or unrecognized ticker symbol — 404 or validation error
- Payment not authorized or insufficient USDC balance — 402 Payment Required
- Ticker market is closed or no real-time data available — possible 503 or empty response
- Rate limit exceeded — 429 Too Many Requests
- Malformed request body — 400 Bad Request
Tags
x402
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