> ## Documentation Index > Fetch the complete documentation index at: https://docs.kairos.trade/llms.txt > Use this file to discover all available pages before exploring further. # Get all sibling outcomes for the event containing a market > Returns every outcome in the event that `market_id` belongs to (for multi-outcome / grouped markets), served from a cache of pre-computed event/market lookups. Any identifier (market_id, token_id, condition_id, symbol, slug) is mapped to its `event_id`; if that misses, falls back to the per-market entry's embedded `event_id`, then to deriving a Kalshi-style event ticker by stripping the last `-SEGMENT` off `market_id` (e.g. `KXPGATOUR-THGI26-SSTR` → `KXPGATOUR-THGI26`). If no event can be resolved at all and `provider=polymarket`, falls back to a live Polymarket lookup — guarding against a known upstream quirk that can silently return an unrelated default result instead of an empty list. Non-Polymarket providers get no such fallback — an unresolvable event returns the empty shape. `all_ids` (comma-separated, ≤200 ids, each ≤128 chars) additionally resolves `event_groups` — a map from every supplied id (and every sibling id discovered while resolving events) to its `event_id`, used by the frontend to dedupe sibling contracts across dropdowns. **Price scale note:** unlike most of this API, outcome prices here are returned as a **0–1 decimal probability**, not the platform's usual 0–100 cents scale. ## OpenAPI ````yaml /openapi/data-api.yaml get /markets/outcomes openapi: 3.1.0 info: title: Kairos Data API version: 1.0.0 summary: >- The full Kairos data plane — markets, candles, trades, search, discover, sports, trader analytics, and PnL. description: | The Kairos Data API at `data.kairos.trade` is the platform's primary data plane: market metadata and prices, OHLCV candles, live venue trade proxies, normalized trade history, full-text search, discovery feeds, the sports catalog, public trader analytics, and account PnL. ## Authentication Most endpoints accept a Kairos **API key** (`X-Client-Id` + `X-Api-Key` + `X-Api-Secret`, all three) or a first-party session JWT. Endpoints tagged `public` (trader analytics, provider configs, several sports feeds) need no credentials at all. Some endpoints additionally require an API-key **scope** (`trade:read`, `position:read`) — stated per operation. For high-volume market-data consumption (candles/trades/metadata at scale), prefer the dedicated **Market Data API** at `md.kairos.trade` — it has higher budgets, ETag caching, and a binary candle format. ## Rate limits Rate limits use a sliding window keyed on the authenticated user (JWT `sub`) or, for anonymous callers, the trusted client IP. Routes belong to a named **bucket** (`x-kairos-bucket`) whose per-minute budget is shared by every route in it; routes with no bucket run under the service default of 100/minute. `x-kairos-rate-limit` states the bucket's compile-time default — operators can raise or lower a bucket at runtime, so treat the documented number as the baseline, not a contract. 429 responses carry `Retry-After` and `X-RateLimit-*`. ## Conventions - Prices are on the **0–100 cents scale** unless a field says otherwise (trader-analytics position/trade prices use the 0–1 scale; each field's description states its scale). - Errors: `{"detail": ""}` for handler errors; FastAPI's standard validation envelope for 422s. Errors surfaced from a venue adapter instead use `{"error", "provider", "operation", "message"}` — see `DataProviderError`. Unhandled failures always return the generic 500 body; internal details are logged, never returned. - Every request body is capped at 8 MiB service-wide (413). contact: name: Kairos url: https://app.kairos.trade/docs/api-reference termsOfService: https://kairos.trade/terms servers: - url: https://data.kairos.trade description: Production - url: https://staging-data.kairos.trade description: Staging security: - apiKeyClientId: [] apiKeyKey: [] apiKeySecret: [] paths: /markets/outcomes: get: tags: - Markets summary: Get all sibling outcomes for the event containing a market description: > Returns every outcome in the event that `market_id` belongs to (for multi-outcome / grouped markets), served from a cache of pre-computed event/market lookups. Any identifier (market_id, token_id, condition_id, symbol, slug) is mapped to its `event_id`; if that misses, falls back to the per-market entry's embedded `event_id`, then to deriving a Kalshi-style event ticker by stripping the last `-SEGMENT` off `market_id` (e.g. `KXPGATOUR-THGI26-SSTR` → `KXPGATOUR-THGI26`). If no event can be resolved at all and `provider=polymarket`, falls back to a live Polymarket lookup — guarding against a known upstream quirk that can silently return an unrelated default result instead of an empty list. Non-Polymarket providers get no such fallback — an unresolvable event returns the empty shape. `all_ids` (comma-separated, ≤200 ids, each ≤128 chars) additionally resolves `event_groups` — a map from every supplied id (and every sibling id discovered while resolving events) to its `event_id`, used by the frontend to dedupe sibling contracts across dropdowns. **Price scale note:** unlike most of this API, outcome prices here are returned as a **0–1 decimal probability**, not the platform's usual 0–100 cents scale. operationId: getMarketOutcomes parameters: - name: market_id in: query required: true schema: type: string maxLength: 128 description: >- Market ID / ticker / token_id / slug. Non-empty after trimming, ≤128 chars. example: KXPGATOUR-THGI26-SSTR - name: provider in: query required: true schema: type: string description: Provider name; must be an active provider. example: kalshi - name: all_ids in: query required: false schema: type: string description: >- Comma-separated list of additional contract ids (≤200 items, each ≤128 chars) to resolve into `event_groups` for dropdown deduplication. responses: '200': description: >- Event outcomes for the market, or the empty shape if no event could be resolved. content: application/json: schema: $ref: '#/components/schemas/MarketsOutcomesResponse' '400': description: >- Invalid/unknown provider, empty `market_id`, an oversized identifier, or too many `all_ids`. content: application/json: schema: type: object properties: detail: type: string '401': $ref: '#/components/responses/DataUnauthorized' '403': $ref: '#/components/responses/DataForbidden' '422': $ref: '#/components/responses/DataValidationError' '429': $ref: '#/components/responses/DataRateLimited' components: schemas: MarketsOutcomesResponse: type: object required: - event_title - outcomes - is_grouped - event_groups - event_titles properties: event_title: type: - string - 'null' image: type: - string - 'null' icon: type: - string - 'null' provider: type: - string - 'null' category: type: - string - 'null' outcomes: type: array items: $ref: '#/components/schemas/MarketsOutcomeItem' is_grouped: type: boolean matched_market_id: type: - string - 'null' description: >- The outcome entry that corresponds to the queried market_id, if found among the returned outcomes. event_groups: type: object additionalProperties: type: string description: >- Maps every requested id (market_id plus each all_ids entry, plus every sibling id discovered while resolving) to its event_id. event_titles: type: object additionalProperties: type: string description: Maps every event_id referenced in event_groups to its title. MarketsOutcomeItem: type: object properties: market_id: type: string title: type: string outcome_label: type: string price: type: number description: >- 0-1 decimal probability (stored cents / 100.0) — NOT the platform's usual 0-100 cents scale. example: 0.62 volume_total: type: number volume_24h: type: number volume_1h: type: number token_id: type: - string - 'null' condition_id: type: - string - 'null' image: type: - string - 'null' description: >- Only present when served from the discover cache, not from the direct upstream-provider fallback path. icon: type: - string - 'null' expiration: type: - string - 'null' DataError: type: object description: Handler error envelope (FastAPI HTTPException). required: - detail properties: detail: type: string description: Human-readable error message. example: Invalid provider responses: DataUnauthorized: description: > No valid credential presented — missing/invalid API-key headers, or an invalid/expired session token. content: application/json: schema: $ref: '#/components/schemas/DataError' example: detail: Not authenticated DataForbidden: description: > Authenticated but not permitted. Three distinct causes: the session user is not invited (`Invite required`), the API key lacks the operation's scope, or API-key access to the requested venue is switched off (`API access is disabled for `). Admin and API-key callers bypass the invite check; session and admin callers bypass scope and venue checks. content: application/json: schema: $ref: '#/components/schemas/DataError' example: detail: Invite required DataValidationError: description: Request failed FastAPI parameter validation. content: application/json: schema: type: object required: - detail properties: detail: type: array description: >- One entry per failed field, with location, message, and error type. items: type: object additionalProperties: true DataRateLimited: description: > Rate limit exceeded for this route's sliding window, keyed on the session `sub` when authenticated and on the trusted client IP otherwise. Honor `Retry-After`. A per-API-key data ceiling (set per credential) rejects with `{"detail": "API key data rate limit exceeded"}` instead of the `error` envelope below. headers: Retry-After: schema: type: integer X-RateLimit-Limit: schema: type: integer X-RateLimit-Remaining: schema: type: integer X-RateLimit-Reset: schema: type: integer content: application/json: schema: type: object properties: error: type: string example: 'Rate limit exceeded: 100 per 1 minute' securitySchemes: apiKeyClientId: type: apiKey in: header name: X-Client-Id description: >- Credential client id (`kairos_ck_...`). Must be sent together with X-Api-Key and X-Api-Secret. apiKeyKey: type: apiKey in: header name: X-Api-Key description: 64-char hex API key. apiKeySecret: type: apiKey in: header name: X-Api-Secret description: 64-char hex API secret. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.