Curistat Developer API

Polygon sells price bars. Curistat sells what to do with them.

Volatility forecasts (r=0.86), 24 rare signals, 5 proprietary indices, regime detection, and a full prop firm toolkit -- all via a simple REST API.

Start Free View Pricing

Derived Intelligence

Not raw data. Our API returns forecasts, ratings, signals, and actionable intelligence computed from 62 features and 10 years of backtested data.

35+ Endpoints

From daily volatility forecasts to Monte Carlo prop firm simulations. Four endpoint bundles covering every use case.

Test Before You Buy

Every endpoint works with sandbox keys (sample data). Build your integration, verify it works, then switch to a live key.

Simple, Consistent Responses

{
  "data": {
    "cvn": 7,
    "cvn_label": "High",
    "crc": "Elevated",
    "crc_score": 68,
    "signals": 3,
    "cti": "Favorable",
    "cesi": "Surprise Up",
    "lpi": "Tightening"
  },
  "meta": {
    "request_id": "req_a1b2c3d4e5f6",
    "timestamp": "2026-02-16T19:00:00Z",
    "product": "ES",
    "tier": "builder",
    "daily_remaining": 4832,
    "daily_limit": 5000
  }
}

Endpoint Bundles

Our crown jewels -- the intelligence that powers everything

GET/developer/v1/forecast/todayDaily volatility forecast (rating 1-10)

GET/developer/v1/forecast/week5-day forward forecast

GET/developer/v1/forecast/multidayPersistence-adjusted outlook

GET/developer/v1/signals24 rare signals scan

GET/developer/v1/directionDirectional bias (17 components)

GET/developer/v1/session-planFull session planner

Developer API Pricing

Separate from consumer plans. Pay for the intelligence your application needs.

Sandbox

$0/mo

Evaluate the API with sample data

✓100 requests/day
✓Core Intelligence endpoints
✓ES only
✓Today's data only
✓1 API key
✓Documentation access

Start Free

Builder

$49/mo

$490/yr (save 17%)

Power your bots, alerts, and newsletters

✓5,000 requests/day
✓Core + Regime bundles
✓ES + NQ products
✓30 days history
✓2 API keys
✓Email support (48h)

Get Builder

Pro API

$149/mo

$1,490/yr (save 17%)

Full intelligence for algo traders and fintech

✓50,000 requests/day
✓Core + Regime + Research bundles
✓ES + NQ products
✓1 year history
✓5 API keys
✓Webhooks (forecast.updated, signal.fired)
✓Email support (24h) + Slack
✓Soft cap overage ($0.005/req)

Get Pro API

Enterprise

$499+/mo

White-label for platforms and aggregators

✓500,000 requests/day
✓All bundles including Prop Tools
✓ES + NQ + custom products
✓Full history (2015+)
✓20 API keys
✓Webhooks + custom events
✓Dedicated Slack channel
✓Negotiated overage rates

Contact Sales

Dead Simple Authentication

API keys use the format cst_live_... and are passed as Bearer tokens:

curl -H "Authorization: Bearer cst_live_a1b2c3d4e5f6..." \
  https://api.curistat.com/developer/v1/forecast/today

Rate limit headers included on every response:X-RateLimit-Limit,X-RateLimit-Remaining,X-RateLimit-Reset

AI Agent API

Purpose-built tiers for AI trading agents. Per-minute rate limits, endpoint cooldowns, and HMAC response signing for data integrity verification.

Agent Keys

Agent keys use the format cst_agent_... with dedicated rate limits.

Explorer -- Free, 500/day, 10/min
Builder -- $49/mo, 10K/day, 50/min
Pro -- $149/mo, 100K/day, 200/min
Enterprise -- Custom, 1M/day, 1K/min

Response Signing

Every agent response includes an X-Curistat-Signature header. Verify with the signing_secret provided at key creation.

sig = hmac.new(
  secret.encode(), body, sha256
).hexdigest()
assert sig == header.replace("sha256=","")

Endpoint Cooldowns

Agent keys have per-endpoint cooldowns because forecast data updates infrequently. Requests within the cooldown return 429 with Retry-After and X-Curistat-Cache: HIT.

Forecast, Regime, Signals, Direction5 min cooldownCalendar10 min cooldownSeasonal, Similar Days1 hour cooldown

Ready to integrate?

Create a free sandbox key in 30 seconds. No credit card required.

Get Your API Key