> ## Documentation Index > Fetch the complete documentation index at: https://docs.backquant.com/llms.txt > Use this file to discover all available pages before exploring further. # Tape - aggregate stats > Tape statistics for a window. Aggregate stats over a time window - useful for Methix-style scorers that don't need raw trades, just the summary numbers. Aggregate roll-up over a configurable window (up to 7 days). Returns overall + per-venue totals: trade count, total premium in USD, contract volume, call/put split, and buy-side vs sell-side premium. Use this when you don't need raw trades - just the headline numbers for a scoring model, dashboard, or alert. ## Example response shape ```json theme={null} { "success": true, "data": { "window_hours": 24, "overall": { "trades": 59145, "premium_usd": 65332823.53, "contracts": 59627.75, "calls": 31431, "puts": 27714, "buy_premium_usd": 31252458.99, "sell_premium_usd": 34080364.54 }, "per_venue": { "deribit": { "trades": 14610, "premium_usd": 51521299.5, ... }, "bybit": { "trades": 44406, "premium_usd": 5759987.3, ... }, "okx": { "trades": 123, "premium_usd": 8051378.5, ... }, "binance": { "trades": 6, "premium_usd": 158.0, ... } } }, "meta": { "version": "2.6", "computed_at": "...", "source": [...] } } ``` ## See also ## OpenAPI ````yaml GET /tape/stats openapi: 3.1.0 info: title: BackQuant API v2 description: >- # BackQuant API v2 Options + gamma-exposure focused public API. Built on the same data the BackQuant Pro Terminal renders - pre-computed every 30s, served from cache. ## What's in v2 * **Discovery**: `/v2/symbols` (universe + per-symbol freshness + supported endpoint list), `/v2/expiries` (active expiry tokens with DTE), `/v2/status` (per-symbol-per-category health with thresholds + overall classification). * **GEX**: composable levels (HVL / call wall / put support / max-pain / expected move / gamma-flip zones), strike profile with typed expiry filter, expiry profile, strike × expiry heatmap with downsampling, greek time-heatmap with DTE/OI/IV filters, history (cursor-paginated), Postgres-backed stress history, **per-expiry max-pain with pain curve**. * **Options**: filtered options chain with two-layer projection (top-level `?fields=` and per-contract `?include=oi,iv,greeks,bid_ask,volume,gex`) plus moneyness filter (`?moneyness_min=0.9&moneyness_max=1.1`), expiry summary table, full IV suite (surface / term structure / 25Δ-10Δ skew / curves / **single-expiry smile** / IV-RV history / VRP), expected move, **Breeden-Litzenberger probability density and surface**, typed greek profiles (delta / theta / vanna / charm / vega), strike × time charm/vega surfaces, strike × expiry 3D greek surface, OI by expiry + history, put/call ratio (intraday or daily), 0DTE & weekly premium tide, dated-futures term structure. * **Liquidation**: heatmap + leverage-tiered distribution. * **Multi**: `/v2/multi/gex/levels` - bundled multi-symbol read across the universe in one round-trip, with the same `?include=` model as the single-symbol endpoint. ## Authentication Every v2 route (except `/v2/openapi.json`, `/v2/docs`, `/v2/redoc`, and `/v2/health`) requires the `X-API-Key` header. ``` X-API-Key: bq_live_your_api_key_here ``` **Get your API key at [backquant.com/api-access](https://backquant.com/api-access).** The same key works across v1 and v2 - if you already have a v1 key, no re-issuance is needed. ## Rate limits Two budgets, both derived from your subscription tier: a **monthly request allowance** per account, and a **per-minute burst** per key. Size your integration against the monthly figure - sustained polling at the burst rate exhausts the month early. | Plan | Monthly allowance | Burst | Sustained | |---------------------------|-------------------|----------|-------------| | Starter (Terminal Yearly) | 10,000 req/month | 10/min | ~333/day | | Standard (Crypto API) | 250,000 req/month | 60/min | ~8,300/day | | Pro (Terminal + API) | 1,000,000/month | 120/min | ~33,000/day | | Enterprise | custom | 600/min | custom | Headers `X-RateLimit-Limit / -Remaining / -Reset` (burst) and `X-Quota-Limit / -Used / -Remaining / -Period` (monthly) are included in every response; the rate-limit triple is echoed inside `meta.rate_limit` when populated by middleware. Exceeding either budget returns `429`. The live ladder is served at `GET /v2/meta` under `rate_limits`. ## Response envelope ```json { "success": true, "data": { ... }, "meta": { "version": "2.0", "timestamp": "2026-04-29T12:00:00.000Z", "request_id": "req_…", "symbol": "BTCUSDT", "spot_price": 67213.5, "computed_at": "2026-04-29T11:59:48.000Z", "freshness_seconds": 12.0, "source": ["deribit","bybit","okx","binance","derive","thalex","delta_india","delta"], "exchanges_filtered": ["deribit","bybit"] } } ``` ## Errors ```json { "success": false, "error": { "code": "NOT_FOUND", "message": "No data for BTCUSDT" }, "meta": { "version": "2.0", "timestamp": "..." } } ``` | Code | When | |-----------------------|------| | `UNAUTHORIZED` | Missing or invalid API key | | `FORBIDDEN` | Subscription doesn't allow API access | | `NOT_FOUND` | Symbol/expiry/etc. not present in cache | | `VALIDATION_ERROR` | Bad query parameters | | `RATE_LIMIT_EXCEEDED` | Per-tier limit hit | | `UPSTREAM_ERROR` | Cache or DB temporarily unreachable | | `INTERNAL_ERROR` | Anything else | version: '2.6' servers: [] security: [] tags: - name: Meta description: Unauthenticated metadata + endpoint catalog (planning your integration) - name: Discovery description: Symbol catalog, active expiries, and service status - name: GEX description: Gamma exposure analytics - name: Options description: Options chain, IV, greeks, probability, premium tide - name: Liquidation description: Liquidation heatmap and distribution - name: Multi description: Bundled multi-symbol endpoints (single round-trip across the universe) paths: /tape/stats: get: tags: - Tape summary: Tape statistics for a window description: >- Aggregate stats over a time window - useful for Methix-style scorers that don't need raw trades, just the summary numbers. Computes count, total premium, buy/sell split, call/put split, per-venue breakdown, all in a single query. operationId: get_tape_stats_tape_stats_get parameters: - name: symbol in: query required: false schema: enum: - BTCUSDT - ETHUSDT - SOLUSDT - HYPEUSDT type: string description: 'Trading symbol: BTCUSDT, ETHUSDT, SOLUSDT, or HYPEUSDT.' default: BTCUSDT title: Symbol description: 'Trading symbol: BTCUSDT, ETHUSDT, SOLUSDT, or HYPEUSDT.' - name: venues in: query required: false schema: anyOf: - type: string - type: 'null' title: Venues - name: hours in: query required: false schema: type: integer maximum: 168 minimum: 1 description: Window in hours (max 7d). default: 24 title: Hours description: Window in hours (max 7d). - name: premium_min_usd in: query required: false schema: anyOf: - type: number minimum: 0 - type: 'null' title: Premium Min Usd - name: X-API-Key in: header required: false schema: anyOf: - type: string - type: 'null' title: X-Api-Key responses: '200': description: Successful Response content: application/json: schema: {} '401': description: Invalid or missing API key content: application/json: example: success: false error: code: UNAUTHORIZED message: Invalid API key meta: version: '2.0' timestamp: '2026-04-29T12:00:00Z' '404': description: No data available for the requested resource content: application/json: example: success: false error: code: NOT_FOUND message: No data for BTCUSDT meta: version: '2.0' timestamp: '2026-04-29T12:00:00Z' '422': description: Validation error on query parameters content: application/json: example: success: false error: code: VALIDATION_ERROR message: Invalid request parameters details: errors: [] meta: version: '2.0' timestamp: '2026-04-29T12:00:00Z' '429': description: Rate limit exceeded content: application/json: example: success: false error: code: RATE_LIMIT_EXCEEDED message: Rate limit exceeded. Try again later. meta: version: '2.0' timestamp: '2026-04-29T12:00:00Z' security: - ApiKeyAuth: [] components: securitySchemes: ApiKeyAuth: type: apiKey in: header name: X-API-Key description: Your BackQuant API key (same key as v1) ````