Crene API, Developer Documentation

API · MAY 2026

The probability endpoint.

Send any forward looking question, receive a calibrated probability backed by four frontier models. Cross model disagreement is exposed as an uncertainty signal, not averaged away. The Probability endpoint is in private development; read endpoints over the resolved event corpus are open today.
Quick start

Public read endpoints over the resolved event corpus. No key required, no rate limit for reads. Returns JSON.

Base URL
https://api-get.crene.com
Try it

Full canonical platform stats: model leaderboard, per category breakdown, active and resolved counts, calibration metrics.

curl https://api-get.crene.com/api/events/crene_stats/
Other public endpoints
Headline calibration stats
curl https://api-get.crene.com/api/events/accuracy/
Active forecasts feed, most recent first
curl https://api-get.crene.com/api/events/lang/en/?limit=20
Clusters with current consensus
curl https://api-get.crene.com/api/clusters/

The Probability endpoint, write access for arbitrary forward looking questions, is in private development. Design partners can request a key in the access section below.

Authentication

The Probability endpoint 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

GET/api/events/lang/en/Active forecasts in the resolved event corpus. Multi model consensus across macro, rates, crypto, commodities, and policy events.
GET/api/events/accuracy/Resolved-event accuracy summary. Brier scores, accuracy by confidence tier, per-domain breakdown.
GET/api/events/crene_stats/Canonical platform stats: active and resolved counts, calibration metrics, model leaderboard, coverage.
Live corpus stats
LIVE
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Active forecasts
Across earnings, macro, crypto, commodities, central banks.
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Resolved outcomes
Verified against authoritative sources, Brier scored per model per event.
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S&P 500 companies
Active earnings coverage across the index, refreshed daily.
Access
Available today
Public read endpoints

Read access over the resolved event corpus. Returns JSON. No key required, no rate limit. Stable URLs.

View endpoints ↑
Design partner waitlist
The Probability endpoint

Write access for arbitrary forward looking questions. Currently in private development with a small set of design partners. Each issued key is rate limited and tracked.

Crene Developers