Crene API, Developer Documentation

API ReferenceREST

Probability API for decisions. Send any forward looking question, receive a calibrated probability backed by four frontier models. Cross-model disagreement is exposed as an uncertainty signal. Public read endpoints over the resolved event corpus remain open.

Quick start
# Probability API (private access, requires key)
curl -X POST "https://api-get.crene.com/probability" \
  -H "X-API-Key: crene_..." \
  -H "Content-Type: application/json" \
  -d '{"question": "Will competitor X launch product Y before September?"}'

# Public read endpoints over resolved corpus
curl "https://api-get.crene.com/api/events/accuracy/"
curl "https://api-get.crene.com/api/events/crene_stats/"
curl "https://api-get.crene.com/api/events/lang/en/?limit=20"
Authentication

The Probability API requires a key passed as the X-API-Key header. Read endpoints over the resolved event corpus remain public.

Resolved outcomes are verified against tier A authoritative sources (government data, central banks, SEC filings, primary financial reporting) with full provenance stored per event. How resolution works

Request API access
GET
/probabilityAPI Key

Convert any forward looking question into a calibrated probability. Multi model consensus across Claude, GPT, Gemini, and Grok. Cross-model disagreement returned as an uncertainty signal. Currently in private access.

What's in the data
-
Active forecasts
Across earnings, macro, crypto, commodities, central banks, and more
-
Resolved outcomes
Verified against authoritative sources, Brier scored per model per event
-
S&P 500 companies
Active earnings coverage across the index, refreshed daily
Access
Probability API is in private access

We are onboarding a small set of design partners while the calibration corpus matures. Each issued key is rate limited and tracked. Read endpoints over the resolved event corpus remain public and need no key.

Request API access
Base URL
https://api-get.crene.com
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