> ## 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. # Enumerate active markets for a provider (MMC cursor page) > Returns one cursor-paginated page of the active-market snapshot for a single provider. If the upstream listing is unavailable or the lookup otherwise fails, the route responds `503 Service Unavailable` ("Active market snapshot is temporarily unavailable") rather than fabricating an empty page — this can also happen for an exchange whose listing isn't ready yet. The response echoes back the validated/lowercased `provider` and a `source` field. `next_cursor` is opaque — pass it back verbatim as `cursor` to fetch the next page; `has_more: false` / `next_cursor: null` marks the last page. Cursor page: pass the returned `next_cursor` back as `cursor`, and stop when `has_more` is `false`. ## OpenAPI ````yaml /openapi/data-api.yaml get /markets/active 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/active: get: tags: - Markets summary: Enumerate active markets for a provider (MMC cursor page) description: > Returns one cursor-paginated page of the active-market snapshot for a single provider. If the upstream listing is unavailable or the lookup otherwise fails, the route responds `503 Service Unavailable` ("Active market snapshot is temporarily unavailable") rather than fabricating an empty page — this can also happen for an exchange whose listing isn't ready yet. The response echoes back the validated/lowercased `provider` and a `source` field. `next_cursor` is opaque — pass it back verbatim as `cursor` to fetch the next page; `has_more: false` / `next_cursor: null` marks the last page. operationId: listActiveMarkets parameters: - name: provider in: query required: false schema: type: string minLength: 1 maxLength: 64 default: polymarket description: > Provider/exchange id. Must be an active, known provider or the request is rejected with 400. example: polymarket - name: limit in: query required: false schema: type: integer minimum: 1 maximum: 250 default: 100 example: 100 - name: cursor in: query required: false schema: type: string maxLength: 512 description: Opaque pagination cursor from a previous page's `next_cursor`. responses: '200': description: One page of active markets for the provider. content: application/json: schema: $ref: '#/components/schemas/MarketsActivePageResponse' '400': description: Unknown/inactive provider. content: application/json: schema: type: object properties: detail: type: string example: 'Invalid provider: foobar' '401': $ref: '#/components/responses/DataUnauthorized' '403': $ref: '#/components/responses/DataForbidden' '422': $ref: '#/components/responses/DataValidationError' '429': $ref: '#/components/responses/DataRateLimited' '503': description: >- No active-market listing is ready for this provider yet, or the upstream lookup failed. content: application/json: schema: type: object properties: detail: type: string example: Active market snapshot is temporarily unavailable components: schemas: MarketsActivePageResponse: type: object description: >- One page of the active-market listing for a provider, with `provider`/`source` stamped on by the API. required: - exchange_id - markets - count - next_cursor - has_more - provider - source properties: exchange_id: type: string description: Lower-cased exchange id the market is listed under. example: polymarket markets: type: array items: $ref: '#/components/schemas/MarketsActiveMarket' count: type: integer description: Number of markets in this page (`markets.length`). example: 100 next_cursor: type: - string - 'null' description: Opaque cursor for the next page, or null if this is the last page. has_more: type: boolean provider: type: string description: Echo of the validated/lowercased `provider` query param. example: polymarket source: type: string description: >- Opaque internal origin marker. NOT a stable part of the contract — its value may change without notice; do not depend on or switch on it. MarketsActiveMarket: type: object description: One market's cached metadata, including its full upstream `raw` payload. properties: exchange_id: type: string market_id: type: string condition_id: type: string event_id: type: string title: type: string neg_risk: type: boolean tick_size: type: - number - 'null' taker_base_fee_bps: type: - integer - 'null' fees_enabled: type: - boolean - 'null' category: type: - string - 'null' group_slug: type: - string - 'null' fee_type: type: - string - 'null' status: type: - string - 'null' image: type: - string - 'null' icon: type: - string - 'null' end_date: type: - string - 'null' open_time: type: - string - 'null' outcomes: type: array items: $ref: '#/components/schemas/MarketsActiveMarketOutcome' raw: type: object additionalProperties: true description: Full upstream provider payload as last captured. resolution_status: type: string description: Present only once the market has a resolution status recorded. payout_numerators: type: array items: type: integer description: Present only once CTF payout numerators are known. resolved_ts: type: string proposed_price: type: number challenge_window_ends_at: type: string DataError: type: object description: Handler error envelope (FastAPI HTTPException). required: - detail properties: detail: type: string description: Human-readable error message. example: Invalid provider MarketsActiveMarketOutcome: type: object properties: outcome: type: string example: 'Yes' normalized_outcome: type: string example: 'yes' token_id: type: string outcome_index: type: integer description: Present only for exchanges keyed by market_id, index < 2. side: type: string enum: - true - 'no' description: Present only for exchanges keyed by market_id, index < 2. 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.