Changelog

All notable changes to the Kwery API. Dates reflect production deployment. Breaking changes are called out explicitly.

2026-03-15 — v1.6.0

API documentation reorganized into 6 endpoint groups: Price data, Microstructure, Derivatives, Prediction markets, Discovery, and Account & operations
/v1/oracle and /v1/derived are now grouped under Price data alongside /v1/candles
/v1/orderbook and /v1/trades are now grouped under Microstructure
Prediction market endpoints (/v1/markets, /v1/snapshots) are now grouped under Prediction markets

/v1/symbols — New discovery endpoint returning all available symbols with per-symbol source, interval, and earliest-data metadata. 0 credits.
Kalshi market discovery — /v1/markets now accepts ?source=kalshi to list Kalshi event contracts alongside Polymarket markets. Omit source to query both platforms.
Unified cursor pagination — /v1/markets and /v1/snapshots/{id} now support cursor-based pagination (after parameter) consistent with all other endpoints. The offset parameter is deprecated.

/v1/markets/slug/{slug} — Removed. Use /v1/markets/{identifier} instead, which accepts market_id, condition_id, or slug.

Added /v1/derived endpoint with cross-source basis and implied volatility metrics
Added min_usd filter for /v1/liquidations (Business+)
Added X-Rows-Capped response header to indicate when results are truncated by tier limits

Initial API release
Endpoints: /v1/candles, /v1/snapshots, /v1/markets, /v1/sources, /v1/limits
Authentication via ?api-key=YOUR_KEY query parameter
Free, Pro, and Business tiers