> ## Documentation Index > Fetch the complete documentation index at: https://docs.polysimulator.com/llms.txt > Use this file to discover all available pages before exploring further. # Get Tick Size > Polymarket-compat ``GET /tick-size/{token_id}``. Resolution order (freshest source wins): - **Grow (0.001 → 0.01)**: previously-valid 0.001-step quotes are no longer multiples of the new tick. PM rejects with ``INVALID_ORDER_MIN_TICK_SIZE``. This is the case where missing the change silently breaks the bot. - **Shrink (0.01 → 0.001)**: 0.01-step quotes are still valid multiples of 0.001, so orders aren't rejected — but the bot is leaving precision on the table and quoting less competitively than the rest of the book. SDK porters reading PM docs expect tick refresh in both directions. On transient upstream failure (DB/Redis unavailable) the handler returns ``503`` with ``Retry-After: 2``, NOT a silent default tick. ## OpenAPI ````yaml /openapi.json get /v1/tick-size/{token_id} openapi: 3.1.0 info: title: Polysimulator API summary: HFT-style paper-trading API for Polymarket simulation. description: >- PolySimulator HFT API v1 — Virtual trading environment for Polymarket prediction markets. Practice trading with real market data using paper money, then switch to live trading by changing only your API credentials. termsOfService: https://polysimulator.com/legal/terms contact: name: PolySimulator url: https://polysimulator.com license: name: Proprietary — usage subject to Polysimulator Terms of Service url: https://polysimulator.com/legal/terms version: 1.0.0-beta servers: - url: https://api.polysimulator.com description: Production - url: https://staging-api.polysimulator.com description: Staging security: - ApiKeyAuth: [] tags: - name: API Keys description: >- Bootstrap, create, list, revoke API keys, mint short-lived WebSocket tokens, list rate-limit tiers. - name: Account description: >- Balance, equity curve, portfolio composition, open positions, trade history. - name: Export description: >- Pro data export — streamed CSV downloads for offline analysis, backtesting, and tax/accounting. v1: GET /v1/export/trades.csv (FILLED trades, keyset-paginated). Dual session + API-key auth. - name: Profile Analysis description: >- Trading-profile analytics — Sharpe, win-rate, drawdown, holding-period histograms. - name: Wallets description: >- Multi-wallet management (MAIN / SANDBOX / API / COMPETITION). List, switch active wallet, per-wallet balance + history. - name: Trading description: >- Place, cancel, batch, and list orders. Cancel-all + cancel-market-orders sweep endpoints. PolySimulator-native order surface. - name: Market Data description: >- Polymarket market metadata + live prices (POST /v1/prices/batch, /v1/markets, /v1/markets/{condition_id}/candles). - name: CLOB Read (Public) description: >- Polymarket-shape read endpoints (book, midpoint, spread, price, last-trade-price, tick-size, neg-risk, time). Wire-compatible with py-clob-client. - name: CLOB Compat description: >- Polymarket-shape order surface (POST /v1/order with nested body, POST /v1/orders batch, GET /v1/data/orders PM-envelope). Use these for drop-in py-clob-client compatibility. - name: WebSocket description: >- WebSocket subscription endpoints — /v1/ws/prices for live market data, /v1/ws/executions for order-state updates. - name: Billing description: >- Stripe-backed subscriptions, top-ups, customer portal, refund policy, paid-tier resets. - name: Status description: System-status surface — uptime, component health, recent incident markers. - name: Health description: >- Health, liveness, readiness, and authenticated-identity probes (/v1/health, /v1/health/live, /v1/health/ready, /v1/me). - name: Football description: >- Football / World-Cup 2026 enrichment — live score, minute, momentum, possession, xG, shotmap, commentary, lineups, group standings, knockout bracket, and head-to-head. Public read-only sports facts the UI merges with tradable Polymarket prices; degrades to empty shapes on upstream failure. paths: /v1/tick-size/{token_id}: get: tags: - CLOB Read (Public) - CLOB Read (Public) summary: Get Tick Size description: |- Polymarket-compat ``GET /tick-size/{token_id}``. Resolution order (freshest source wins): - **Grow (0.001 → 0.01)**: previously-valid 0.001-step quotes are no longer multiples of the new tick. PM rejects with ``INVALID_ORDER_MIN_TICK_SIZE``. This is the case where missing the change silently breaks the bot. - **Shrink (0.01 → 0.001)**: 0.01-step quotes are still valid multiples of 0.001, so orders aren't rejected — but the bot is leaving precision on the table and quoting less competitively than the rest of the book. SDK porters reading PM docs expect tick refresh in both directions. On transient upstream failure (DB/Redis unavailable) the handler returns ``503`` with ``Retry-After: 2``, NOT a silent default tick. operationId: getTickSize parameters: - name: token_id in: path required: true schema: type: string title: Token Id responses: '200': description: Successful Response content: application/json: schema: $ref: '#/components/schemas/TickSizeResponse' headers: X-RateLimit-Limit: description: >- Requests permitted in the current minute window for this key's tier. schema: type: string X-RateLimit-Remaining: description: Requests remaining in the current minute window. schema: type: string X-RateLimit-Reset: description: Unix-seconds timestamp when the current minute window resets. schema: type: string X-Polysim-RateLimit-Limit: description: Alias of X-RateLimit-Limit (requests per minute for this tier). schema: type: string X-Polysim-RateLimit-Remaining: description: Alias of X-RateLimit-Remaining (requests remaining this minute). schema: type: string X-Polysim-RateLimit-Reset: description: Alias of X-RateLimit-Reset (minute-window reset, unix seconds). schema: type: string X-Request-Id: description: >- Request id for log correlation. Echoes the caller's ``X-Request-Id`` when supplied, otherwise a server-minted UUID. Stamped on every response (success and error). schema: type: string '404': description: Resource not found (market / order / token). content: application/json: schema: $ref: '#/components/schemas/ApiError' headers: X-Polysim-Code: description: >- Stable short code identifying the error class. SDK consumers should branch on this header rather than the body text. Domain codes (INVALID_KEY, MARKET_NOT_FOUND, RATE_LIMIT_EXCEEDED, …) are preferred; HTTP_ fallbacks ship when no domain code applies. The full list is mirrored in /llms.txt under ‘Error Format’. schema: type: string enum: - INVALID_KEY - MISSING_API_KEY - INSUFFICIENT_PERMISSION - INSUFFICIENT_BALANCE - MARKET_CLOSED - INVALID_ORDER_MIN_TICK_SIZE - MARKET_NOT_FOUND - ORDER_NOT_FOUND - RATE_LIMIT_EXCEEDED - BOOK_UNAVAILABLE - VALIDATION_FAILED - UPGRADE_REQUIRED - ACCESS_RESTRICTED - COHORT_FULL - AUTH_STATE_INCOMPLETE - INTERNAL_ERROR - TOKEN_NOT_FOUND - INVALID_CURSOR - UPSTREAM_UNAVAILABLE - UNSUPPORTED_ORDER_TYPE - DUPLICATE_CLIENT_ORDER_ID - ORDER_EXECUTION_FAILED - DEADLINE_OVERSHOT_BUT_PERSISTED - PERSISTENCE_UNKNOWN - INVALID_BODY - INVALID_SOURCE - CLOSED_BETA - API_PRO_COMING_SOON - TIER_KEY_LIMIT_EXCEEDED - HTTP_400 - HTTP_401 - HTTP_403 - HTTP_404 - HTTP_409 - HTTP_422 - HTTP_429 - HTTP_500 - HTTP_502 - HTTP_503 X-Request-Id: description: >- Request id for log correlation. Echoes the caller's ``X-Request-Id`` when supplied, otherwise a server-minted UUID. Stamped on every response (success and error). schema: type: string '422': description: Validation Error content: application/json: schema: $ref: '#/components/schemas/ApiError' headers: X-Polysim-Code: description: >- Stable short code identifying the error class. SDK consumers should branch on this header rather than the body text. Domain codes (INVALID_KEY, MARKET_NOT_FOUND, RATE_LIMIT_EXCEEDED, …) are preferred; HTTP_ fallbacks ship when no domain code applies. The full list is mirrored in /llms.txt under ‘Error Format’. schema: type: string enum: - INVALID_KEY - MISSING_API_KEY - INSUFFICIENT_PERMISSION - INSUFFICIENT_BALANCE - MARKET_CLOSED - INVALID_ORDER_MIN_TICK_SIZE - MARKET_NOT_FOUND - ORDER_NOT_FOUND - RATE_LIMIT_EXCEEDED - BOOK_UNAVAILABLE - VALIDATION_FAILED - UPGRADE_REQUIRED - ACCESS_RESTRICTED - COHORT_FULL - AUTH_STATE_INCOMPLETE - INTERNAL_ERROR - TOKEN_NOT_FOUND - INVALID_CURSOR - UPSTREAM_UNAVAILABLE - UNSUPPORTED_ORDER_TYPE - DUPLICATE_CLIENT_ORDER_ID - ORDER_EXECUTION_FAILED - DEADLINE_OVERSHOT_BUT_PERSISTED - PERSISTENCE_UNKNOWN - INVALID_BODY - INVALID_SOURCE - CLOSED_BETA - API_PRO_COMING_SOON - TIER_KEY_LIMIT_EXCEEDED - HTTP_400 - HTTP_401 - HTTP_403 - HTTP_404 - HTTP_409 - HTTP_422 - HTTP_429 - HTTP_500 - HTTP_502 - HTTP_503 X-Request-Id: description: >- Request id for log correlation. Echoes the caller's ``X-Request-Id`` when supplied, otherwise a server-minted UUID. Stamped on every response (success and error). schema: type: string '429': description: Rate limit exceeded. content: application/json: schema: $ref: '#/components/schemas/ApiError' headers: X-Polysim-Code: description: >- Stable short code identifying the error class. SDK consumers should branch on this header rather than the body text. Domain codes (INVALID_KEY, MARKET_NOT_FOUND, RATE_LIMIT_EXCEEDED, …) are preferred; HTTP_ fallbacks ship when no domain code applies. The full list is mirrored in /llms.txt under ‘Error Format’. schema: type: string enum: - INVALID_KEY - MISSING_API_KEY - INSUFFICIENT_PERMISSION - INSUFFICIENT_BALANCE - MARKET_CLOSED - INVALID_ORDER_MIN_TICK_SIZE - MARKET_NOT_FOUND - ORDER_NOT_FOUND - RATE_LIMIT_EXCEEDED - BOOK_UNAVAILABLE - VALIDATION_FAILED - UPGRADE_REQUIRED - ACCESS_RESTRICTED - COHORT_FULL - AUTH_STATE_INCOMPLETE - INTERNAL_ERROR - TOKEN_NOT_FOUND - INVALID_CURSOR - UPSTREAM_UNAVAILABLE - UNSUPPORTED_ORDER_TYPE - DUPLICATE_CLIENT_ORDER_ID - ORDER_EXECUTION_FAILED - DEADLINE_OVERSHOT_BUT_PERSISTED - PERSISTENCE_UNKNOWN - INVALID_BODY - INVALID_SOURCE - CLOSED_BETA - API_PRO_COMING_SOON - TIER_KEY_LIMIT_EXCEEDED - HTTP_400 - HTTP_401 - HTTP_403 - HTTP_404 - HTTP_409 - HTTP_422 - HTTP_429 - HTTP_500 - HTTP_502 - HTTP_503 X-Request-Id: description: >- Request id for log correlation. Echoes the caller's ``X-Request-Id`` when supplied, otherwise a server-minted UUID. Stamped on every response (success and error). schema: type: string security: [] components: schemas: TickSizeResponse: properties: minimum_tick_size: type: number title: Minimum Tick Size type: object required: - minimum_tick_size title: TickSizeResponse ApiError: properties: error: type: string title: Error description: >- Human-readable message (PM-shape default body) OR machine-readable error code (verbose body). The machine code is always available in the X-Polysim-Code response header. message: anyOf: - type: string - type: 'null' title: Message description: >- Human-readable error description — populated only on verbose body (X-Polysim-Verbose: true). details: anyOf: - additionalProperties: true type: object - type: 'null' title: Details description: Additional context — populated only on verbose body. request_id: anyOf: - type: string - type: 'null' title: Request Id description: >- Request id for support reference. Always exposed via X-Request-Id response header; only inlined in the verbose body. type: object required: - error title: ApiError description: |- Structured error response for all API v1 endpoints. * ``error`` carries the human-readable message in the default body and the machine code in the verbose body. The machine code is ALWAYS exposed via the ``X-Polysim-Code`` response header so SDK consumers can switch on a stable identifier without parsing the body. * ``request_id`` → exposed as the ``X-Request-Id`` response header on every response (success and error). All non-required fields are ``Optional`` so generated SDK code can deserialize *either* shape (PM-default or polysim-verbose) without choking on missing keys. Pre-PR ``message`` was required, which broke SDK deserialization of the new PM-shape body. securitySchemes: ApiKeyAuth: type: apiKey in: header name: X-API-Key description: Issue from /v1/keys (or admin-issued for enterprise tier). ````