> ## Documentation Index > Fetch the complete documentation index at: https://docs.unprice.dev/llms.txt > Use this file to discover all available pages before exploring further. # forecast usage > Project customer feature usage from recent Tinybird usage aggregates. ## OpenAPI ````yaml /openapi.json post /v1/analytics/usage/forecast openapi: 3.0.3 info: title: Unprice API version: 1.0.0 servers: - url: https://api.unprice.dev description: Production - url: http://localhost:8787 description: Development - url: https://preview-api.unprice.dev description: Preview security: - bearerAuth: [] paths: /v1/analytics/usage/forecast: post: tags: - analytics summary: forecast usage description: Project customer feature usage from recent Tinybird usage aggregates. operationId: analytics.usage.forecast requestBody: description: Forecast usage request required: true content: application/json: schema: type: object properties: customer_id: type: string feature_slug: type: string period_key: type: string horizon_days: type: integer minimum: 1 maximum: 31 default: 14 required: - customer_id - feature_slug responses: '200': description: Forecast usage response content: application/json: schema: type: object properties: answer: type: string confidence: type: string enum: - high - medium - low freshness: type: object properties: generatedAt: type: integer dataFrom: type: integer nullable: true dataTo: type: integer nullable: true required: - generatedAt - dataFrom - dataTo evidence: type: array items: type: object properties: type: type: string enum: - event - meter_fact - ingestion_status - ledger_line - billing_period - invoice - plan_version id: type: string source: type: string enum: - tinybird - r2 - ledger - postgres timestamp: type: integer nullable: true required: - type - id - source - timestamp warnings: type: array items: type: string nextActions: type: array items: type: string project_id: type: string customer_id: type: string feature_slug: type: string horizonDays: type: integer projectedUsage: type: number observedDays: type: integer baselineUsage: type: number trendPerDay: type: number periodKey: type: string required: - answer - confidence - freshness - evidence - warnings - nextActions - project_id - customer_id - feature_slug - horizonDays - projectedUsage - observedDays - baselineUsage - trendPerDay '400': description: >- The server cannot or will not process the request due to something that is perceived to be a client error (e.g., malformed request syntax, invalid request message framing, or deceptive request routing). content: application/json: schema: $ref: '#/components/schemas/ErrBadRequest' '401': description: >- Although the HTTP standard specifies "unauthorized", semantically this response means "unauthenticated". That is, the client must authenticate itself to get the requested response. content: application/json: schema: $ref: '#/components/schemas/ErrUnauthorized' '403': description: >- The client does not have access rights to the content; that is, it is unauthorized, so the server is refusing to give the requested resource. Unlike 401 Unauthorized, the client's identity is known to the server. content: application/json: schema: $ref: '#/components/schemas/ErrForbidden' '404': description: >- The server cannot find the requested resource. In the browser, this means the URL is not recognized. In an API, this can also mean that the endpoint is valid but the resource itself does not exist. Servers may also send this response instead of 403 Forbidden to hide the existence of a resource from an unauthorized client. This response code is probably the most well known due to its frequent occurrence on the web. content: application/json: schema: $ref: '#/components/schemas/ErrNotFound' '409': description: >- This response is sent when a request conflicts with the current state of the server. content: application/json: schema: $ref: '#/components/schemas/ErrConflict' '412': description: >- The requested operation cannot be completed because certain conditions were not met. This typically occurs when a required resource state or version check fails. content: application/json: schema: $ref: '#/components/schemas/ErrPreconditionFailed' '429': description: >- The user has sent too many requests in a given amount of time ("rate limiting") content: application/json: schema: $ref: '#/components/schemas/ErrTooManyRequests' '500': description: >- The server has encountered a situation it does not know how to handle. content: application/json: schema: $ref: '#/components/schemas/ErrInternalServerError' components: schemas: ErrBadRequest: type: object properties: error: type: object properties: code: type: string enum: - BAD_REQUEST description: A machine readable error code. example: BAD_REQUEST docs: type: string description: >- A link to our documentation with more details about this error code example: https://docs.unprice.dev/api-reference/errors/code/BAD_REQUEST message: type: string description: A human readable explanation of what went wrong requestId: type: string description: Please always include the requestId in your error report example: req_1234 required: - code - docs - message - requestId required: - error ErrUnauthorized: type: object properties: error: type: object properties: code: type: string enum: - UNAUTHORIZED description: A machine readable error code. example: UNAUTHORIZED docs: type: string description: >- A link to our documentation with more details about this error code example: https://docs.unprice.dev/api-reference/errors/code/UNAUTHORIZED message: type: string description: A human readable explanation of what went wrong requestId: type: string description: Please always include the requestId in your error report example: req_1234 required: - code - docs - message - requestId required: - error ErrForbidden: type: object properties: error: type: object properties: code: type: string enum: - FORBIDDEN description: A machine readable error code. example: FORBIDDEN docs: type: string description: >- A link to our documentation with more details about this error code example: https://docs.unprice.dev/api-reference/errors/code/FORBIDDEN message: type: string description: A human readable explanation of what went wrong requestId: type: string description: Please always include the requestId in your error report example: req_1234 required: - code - docs - message - requestId required: - error ErrNotFound: type: object properties: error: type: object properties: code: type: string enum: - NOT_FOUND description: A machine readable error code. example: NOT_FOUND docs: type: string description: >- A link to our documentation with more details about this error code example: https://docs.unprice.dev/api-reference/errors/code/NOT_FOUND message: type: string description: A human readable explanation of what went wrong requestId: type: string description: Please always include the requestId in your error report example: req_1234 required: - code - docs - message - requestId required: - error ErrConflict: type: object properties: error: type: object properties: code: type: string enum: - CONFLICT description: A machine readable error code. example: CONFLICT docs: type: string description: >- A link to our documentation with more details about this error code example: https://docs.unprice.dev/api-reference/errors/code/CONFLICT message: type: string description: A human readable explanation of what went wrong requestId: type: string description: Please always include the requestId in your error report example: req_1234 required: - code - docs - message - requestId required: - error ErrPreconditionFailed: type: object properties: error: type: object properties: code: type: string enum: - PRECONDITION_FAILED description: A machine readable error code. example: PRECONDITION_FAILED docs: type: string description: >- A link to our documentation with more details about this error code example: >- https://docs.unprice.dev/api-reference/errors/code/PRECONDITION_FAILED message: type: string description: A human readable explanation of what went wrong requestId: type: string description: Please always include the requestId in your error report example: req_1234 required: - code - docs - message - requestId required: - error ErrTooManyRequests: type: object properties: error: type: object properties: code: type: string enum: - TOO_MANY_REQUESTS description: A machine readable error code. example: TOO_MANY_REQUESTS docs: type: string description: >- A link to our documentation with more details about this error code example: >- https://docs.unprice.dev/api-reference/errors/code/TOO_MANY_REQUESTS message: type: string description: A human readable explanation of what went wrong requestId: type: string description: Please always include the requestId in your error report example: req_1234 required: - code - docs - message - requestId required: - error ErrInternalServerError: type: object properties: error: type: object properties: code: type: string enum: - INTERNAL_SERVER_ERROR description: A machine readable error code. example: INTERNAL_SERVER_ERROR docs: type: string description: >- A link to our documentation with more details about this error code example: >- https://docs.unprice.dev/api-reference/errors/code/INTERNAL_SERVER_ERROR message: type: string description: A human readable explanation of what went wrong requestId: type: string description: Please always include the requestId in your error report example: req_1234 required: - code - docs - message - requestId required: - error securitySchemes: bearerAuth: bearerFormat: root key type: http scheme: bearer x-speakeasy-example: UNPRICE_API_KEY ````