x402 API Quickstart
Part of our x402 series: guide · pricing · vs RapidAPI · start here · quickstart · state of x402
Every paid route on our own x402 (a payment protocol built on HTTP 402, explained on the x402 guide) API (a web address one program calls to get data or trigger an action from another) — the same routes an AI agent (software, often built on a large language model, that carries out a task on its own) would call — with one copy-pasteable curl each. Run it as-is: no key, no signup, no schema archaeology — you get the real payment challenge back immediately.
This page exists because we hit the opposite problem building x402 Doctor: endpoints that hide their input shape deep in a discovery doc, so a checker has to guess. Our own 8 routes go through that same bar first — this page is that proof, and every curl on it was run against the live endpoint before this page went up, not simulated.
Historical profit-and-loss telemetry from our grid-trading bot (retired 2026-08-16; the endpoint serves its frozen record). Optional ?depth=N (up to 1000) adds historical equity datapoints.
curl -s https://api.stelardigital.com/telemetry
Unpaid, no arguments changed — returns HTTP 402 with the full payment challenge (network, asset, amount, payTo) in the body. Pay it (any x402-aware HTTP client / wallet) and retry with the payment proof attached to get the real response.
Grid-trading parameter recommendation — grid count, spacing percent, price band, per-grid capital allocation.
curl -s https://api.stelardigital.com/gridparams
Unpaid, no arguments changed — returns HTTP 402 with the full payment challenge (network, asset, amount, payTo) in the body. Pay it (any x402-aware HTTP client / wallet) and retry with the payment proof attached to get the real response.
Market regime classification (choppy / uptrend / downtrend / high-volatility) plus a grid-trading suitability verdict.
curl -s 'https://api.stelardigital.com/regime?symbol=SOL'
Unpaid, no arguments changed — returns HTTP 402 with the full payment challenge (network, asset, amount, payTo) in the body. Pay it (any x402-aware HTTP client / wallet) and retry with the payment proof attached to get the real response.
Sentiment score (-1 to +1) and label for a crypto asset or arbitrary text, via Claude Haiku.
curl -s 'https://api.stelardigital.com/sentiment?symbol=SOL'
Unpaid, no arguments changed — returns HTTP 402 with the full payment challenge (network, asset, amount, payTo) in the body. Pay it (any x402-aware HTTP client / wallet) and retry with the payment proof attached to get the real response.
Current price, 24h/7d percent change, and a bullish/bearish/neutral signal. Optional ?candles=N (up to 30) adds daily OHLC candles.
curl -s 'https://api.stelardigital.com/pricecheck?symbol=SOL'
Unpaid, no arguments changed — returns HTTP 402 with the full payment challenge (network, asset, amount, payTo) in the body. Pay it (any x402-aware HTTP client / wallet) and retry with the payment proof attached to get the real response.
Volatility and drawdown risk regime — current ATR percent versus its 30-day p80 baseline.
curl -s 'https://api.stelardigital.com/risk?symbol=SOL'
Unpaid, no arguments changed — returns HTTP 402 with the full payment challenge (network, asset, amount, payTo) in the body. Pay it (any x402-aware HTTP client / wallet) and retry with the payment proof attached to get the real response.
Complete market brief in one call — trend regime, AI sentiment, live price, and volatility risk combined.
curl -s 'https://api.stelardigital.com/bundle/market-brief?symbol=SOL'
Unpaid, no arguments changed — returns HTTP 402 with the full payment challenge (network, asset, amount, payTo) in the body. Pay it (any x402-aware HTTP client / wallet) and retry with the payment proof attached to get the real response.
Everything in /bundle/market-brief plus an AI-generated synthesis naming the single biggest risk factor.
curl -s 'https://api.stelardigital.com/bundle/deep-signal?symbol=SOL'
Unpaid, no arguments changed — returns HTTP 402 with the full payment challenge (network, asset, amount, payTo) in the body. Pay it (any x402-aware HTTP client / wallet) and retry with the payment proof attached to get the real response.
Full discovery doc
Machine-readable catalog of all resources above, with per-route pricing, tags, and Bazaar input schema: api.stelardigital.com/.well-known/x402
We run this business on these rails ourselves — live endpoints, open-source receipts, honest numbers.
See the live x402 APIx402-receipts on GitHub x402-starter-kit — do it yourself, free
Not financial advice. Any trading-related figures on this page reflect our own retired account. See our Disclaimer.