# TrendlineLabs API

- [TrendlineLabs API](https://platform.trendlinelabs.ai/index.md): Prediction-market data from every venue, one API: REST for reads and history, a WebSocket stream for live books and trades.
- [Getting started](https://platform.trendlinelabs.ai/guides/getting-started.md)
- [Authentication](https://platform.trendlinelabs.ai/guides/authentication.md)
- [Rate limits](https://platform.trendlinelabs.ai/guides/rate-limits.md)
- [Errors](https://platform.trendlinelabs.ai/guides/errors.md)
- [Pagination](https://platform.trendlinelabs.ai/guides/pagination.md)
- [Freshness](https://platform.trendlinelabs.ai/guides/freshness.md)
- [Finding markets](https://platform.trendlinelabs.ai/guides/finding-markets.md)
- [Venues](https://platform.trendlinelabs.ai/guides/venues.md)
- [Versioning](https://platform.trendlinelabs.ai/guides/versioning.md)
- [List active events](https://platform.trendlinelabs.ai/api-reference/events/list-active-events.md): Active cross-venue events in a stable id order, paged with next_cursor (keyset; a cursor binds the filters it was minted under). Liveness: every 200 carries universe_last_seen_at and universe_age_s. An event that becomes active or resolves mid-walk may or may not appear; an event whose id is longer…
- [Get one event with its markets](https://platform.trendlinelabs.ai/api-reference/events/get-one-event-with-its-markets.md): One event with its markets; 404 for an unknown id, 503 when event data is unavailable.
- [Search events by title](https://platform.trendlinelabs.ai/api-reference/events/search-events-by-title.md): Title search over the published corpus; 503 when no corpus is readable or it is older than its bound.
- [Get the calling key](https://platform.trendlinelabs.ai/api-reference/your-key/get-the-calling-key.md): The calling key: id, name, scopes, tier, limit and expiry — never the secret. Needs a valid key and no scope.
- [Get a market's price history bars](https://platform.trendlinelabs.ai/api-reference/markets/get-a-markets-price-history-bars.md): Price history bars at 1m to 1d for a stated window: start and end in unix milliseconds, inclusive, spanning fewer than 1000 bars. OHLC in 0..1, volume_usd null where the venue has no trade tape, basis per venue. Liveness: as_of_ms and cached; last_bar_ts_ms is information, not a liveness signal (a q…
- [Get a market's order book on one venue](https://platform.trendlinelabs.ai/api-reference/markets/get-a-markets-order-book-on-one-venue.md): A market's live L2 book on one venue: YES and NO ladders at most `depth` levels a side, prices 0..1, sizes in contracts. NO is the venue's own NO book when live (no_source book), else derived as 1 - YES (no_source derived; approximate on Polymarket, whose YES and NO are two real books). Liveness: ts…
- [Get a market's newest trades](https://platform.trendlinelabs.ai/api-reference/markets/get-a-markets-newest-trades.md): The newest trades on a Kalshi, Polymarket or Limitless leg, newest first, each exactly ts_ms, outcome and notional_usd (a finite USD amount >= 0 with no upper cap: a large trade is real). Liveness: tape_ts_ms, newest_trade_ts_ms and as_of_ms; the tape is written only on a trade, so a quiet live mark…
- [List live cross-venue opportunities](https://platform.trendlinelabs.ai/api-reference/opportunities/list-live-cross-venue-opportunities.md): Live cross-venue opportunities with the feed's age; 503 when the feed is unreadable, never published or stale.
- [Get current prices for a set of markets](https://platform.trendlinelabs.ai/api-reference/prices/get-current-prices-for-a-set-of-markets.md): Current per-venue prices for up to 50 markets, each leg with its source and age, and whether the closed-leg gate ran.
- [WebSocket stream](https://platform.trendlinelabs.ai/stream/overview.md)
- [Changelog](https://platform.trendlinelabs.ai/changelog.md)

## OpenAPI Specs

- [openapi](/openapi.json)


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