> ## Documentation Index > Fetch the complete documentation index at: https://docs.compute-desk.com/llms.txt > Use this file to discover all available pages before exploring further. # Informational Index: Index As Of Date > Returns EWMA-smoothed index values for a specific historical date ## Example Hopper (US) informational index as of a specific date (resolves to the latest value on or before that date): ```bash theme={null} curl -H "Authorization: Bearer $TOKEN" \ "https://data-api.compute-index.com/v1/info-index/as-of?as_of_date=2026-01-01&index_name=hopper®ion_group=US" ``` ## OpenAPI ````yaml pricing/openapi.json GET /v1/info-index/as-of openapi: 3.1.0 info: title: GPU Pricing API description: |2- **GPU Pricing API** provides real-time and historical pricing data for GPU compute across 50+ cloud providers and GPU marketplaces. ## Features - Search current prices across vendors - Historical price trends - GPU transaction data - **Informational Price Index** — EWMA-smoothed composite indices by GPU family, region, and contract type - **Transaction Price Index** — smoothed indices derived from verified GPU transactions - **Custom Index** — EWMA-smoothed H100 sub-model indices by region, contract type, and vendor category - Global region coverage (US, EU, APAC) - GPU availability tracking - Scope-based API key access control ## Authentication Send your token as a Bearer token in the `Authorization` header on every request: ``` Authorization: Bearer YOUR_TOKEN ``` Example: ```bash curl -H "Authorization: Bearer $TOKEN" "https://data-api.compute-index.com/v1/vendors" ``` Tokens are issued by Compute Index (david@compute-index.com); long-lived, treat as secrets. > The legacy `X-API-Key` header is deprecated — use the `Authorization: Bearer` header above. ## Rate Limits - **Free tier**: 100 requests/minute, 10,000/day - **Pro tier**: 1,000 requests/minute, 100,000/day - **Enterprise**: Custom limits ## Data Coverage - 50+ vendors (AWS, Azure, GCP, Oracle, CoreWeave, Lambda, RunPod, Vast.AI, FluidStack, Vultr, etc.) - 30M+ historical pricing records - Updated multiple times daily ## Support - Support: david@compute-index.com contact: name: API Support email: david@compute-index.com license: name: Commercial License url: https://compute-desk.com/license version: 1.0.0 servers: - url: https://data-api.compute-index.com security: [] paths: /v1/info-index/as-of: get: tags: - Informational Index summary: Get informational index values on a specific date description: Returns EWMA-smoothed index values for a specific historical date operationId: get_info_index_as_of_v1_info_index_as_of_get parameters: - name: as_of_date in: query required: true schema: type: string description: 'Target date (YYYY-MM-DD). Example: 2025-06-15' title: As Of Date description: 'Target date (YYYY-MM-DD). Example: 2025-06-15' - name: index_name in: query required: false schema: anyOf: - type: string - type: 'null' description: 'Index name: hopper, blackwell' title: Index Name description: 'Index name: hopper, blackwell' - name: region_group in: query required: false schema: anyOf: - type: string - type: 'null' description: 'Region group: US, EU' title: Region Group description: 'Region group: US, EU' responses: '200': description: Successful Response content: application/json: schema: $ref: '#/components/schemas/InfoIndexListResponse' example: data: - contract_type: combined date: '2026-07-14' index_name: hopper index_units: usd_per_gpu_per_hr index_value: 2.7605 p5: 1.5657 p95: 4.3304 region_group: US vendor_category: neocloud filters: as_of_date: '2026-07-14' index_name: hopper region_group: US total_count: 1 '401': description: Unauthorized — missing or invalid credentials content: application/json: schema: title: ErrorResponse type: object properties: detail: type: string required: - detail examples: missing_credentials: summary: No credentials supplied value: detail: >- Authentication required. Provide an X-API-Key header or an Authorization: Bearer token. invalid_token: summary: Invalid or expired token value: detail: Invalid or expired token '403': description: Forbidden — key lacks the required scope content: application/json: schema: title: ErrorResponse type: object properties: detail: type: string required: - detail examples: missing_scope: summary: Key lacks the required scope value: detail: >- Access denied. Your API key does not have permission to access this resource. '422': description: Validation Error content: application/json: schema: $ref: '#/components/schemas/HTTPValidationError' example: detail: - type: missing loc: - query - as_of_date msg: Field required input: null '429': description: >- Too Many Requests — limit and reset are returned in X-RateLimit-* headers; the limit reflects your key's tier content: application/json: schema: title: ErrorResponse type: object properties: detail: type: string required: - detail examples: minute_limit: summary: Per-minute limit exceeded (figure reflects your key's tier) value: detail: 'Rate limit exceeded: 100 requests per minute' security: - HTTPBearer: [] components: schemas: InfoIndexListResponse: properties: data: items: $ref: '#/components/schemas/InfoIndexDataPoint' type: array title: Data total_count: type: integer title: Total Count filters: additionalProperties: true type: object title: Filters type: object required: - data - total_count - filters title: InfoIndexListResponse description: Response for current/as-of informational index queries HTTPValidationError: properties: detail: items: $ref: '#/components/schemas/ValidationError' type: array title: Detail type: object title: HTTPValidationError InfoIndexDataPoint: properties: date: type: string title: Date description: Index date (YYYY-MM-DD) index_name: type: string title: Index Name description: Index name (e.g., hopper, h100, b200) region_group: type: string title: Region Group description: Region group (US, EU, APAC, OTHER, all) contract_type: type: string title: Contract Type description: Contract type (spot, ondemand, reserved_1y, combined) vendor_category: type: string title: Vendor Category description: Vendor category (hyperscaler, neocloud, all) index_value: anyOf: - type: number - type: 'null' title: Index Value description: Smoothed index value ($/GPU-hr) index_units: type: string title: Index Units description: Units of the index value default: usd_per_gpu_per_hr p5: anyOf: - type: number - type: 'null' title: P5 description: Smoothed 5th percentile vendor price (clipped <= index_value) p95: anyOf: - type: number - type: 'null' title: P95 description: Smoothed 95th percentile vendor price (clipped >= index_value) type: object required: - date - index_name - region_group - contract_type - vendor_category title: InfoIndexDataPoint description: >- Single data point from the informational price index (all values EWMA-smoothed) ValidationError: properties: loc: items: anyOf: - type: string - type: integer type: array title: Location msg: type: string title: Message type: type: string title: Error Type input: title: Input ctx: type: object title: Context type: object required: - loc - msg - type title: ValidationError securitySchemes: HTTPBearer: type: http scheme: bearer ````