openapi: 3.0.1
info:
  title: Nuclia RAG-as-a-Service Ask API
  description: Specification of the Nuclia (Progress Agentic RAG) cloud API. Nuclia turns unstructured data - documents, files, audio, video, web pages and conversations - into searchable, queryable Knowledge Boxes. This document covers the regional NucliaDB REST API (Knowledge Boxes, resources and ingestion, search, find, ask/chat RAG answers) and the Nuclia Understanding API (NUA / Predict) endpoints. All endpoints are served from a regional zone host.
  termsOfService: https://nuclia.com/terms-and-conditions/
  contact:
    name: Nuclia Support
    url: https://nuclia.com
  version: '1.0'
servers:
- url: https://{zone}.nuclia.cloud/api
  description: Regional Nuclia cloud zone host. Replace {zone} with your account region (for example europe-1 or aws-us-east-2-1). Following the Progress rebrand the same surface is also served from https://{region}.rag.progress.cloud/api.
  variables:
    zone:
      default: europe-1
      description: The Nuclia regional zone for your account.
security:
- apiKey: []
tags:
- name: Ask
  description: Generative RAG answers, chat and summarization grounded in a Knowledge Box.
paths:
  /v1/kb/{kbid}/ask:
    post:
      operationId: ask
      tags:
      - Ask
      summary: Ask a Knowledge Box (RAG generative answer)
      description: 'Ask a natural-language question against a Knowledge Box. Nuclia retrieves the most relevant context (semantic, keyword and graph search), builds a prompt and returns a generative answer with the supporting resources as citations. When the request sets `Accept: application/x-ndjson` (or the SDK streaming flag), the answer is streamed back as newline-delimited JSON / Server-Sent events.'
      parameters:
      - $ref: '#/components/parameters/Kbid'
      - name: X-Synchronous
        in: header
        description: Set to true to receive a single buffered JSON answer instead of a stream.
        schema:
          type: boolean
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/AskRequest'
      responses:
        '200':
          description: Generative answer. Streamed as application/x-ndjson by default, or a single AskResponse object when X-Synchronous is true.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AskResponse'
            application/x-ndjson:
              schema:
                $ref: '#/components/schemas/AskResponse'
  /v1/kb/{kbid}/summarize:
    post:
      operationId: summarize
      tags:
      - Ask
      summary: Summarize resources
      description: Generate a summary across one or more resources in the Knowledge Box.
      parameters:
      - $ref: '#/components/parameters/Kbid'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SummarizeRequest'
      responses:
        '200':
          description: Summary
          content:
            application/json:
              schema:
                type: object
                properties:
                  summary:
                    type: string
components:
  schemas:
    AskResponse:
      type: object
      properties:
        answer:
          type: string
          description: The generated answer text. Streamed incrementally when not synchronous.
        relations:
          type: object
        retrieval_results:
          $ref: '#/components/schemas/FindResults'
        citations:
          type: object
          description: Mapping of cited resources / paragraphs supporting the answer.
        learning_id:
          type: string
        status:
          type: string
          enum:
          - success
          - error
          - no_context
    SummarizeRequest:
      type: object
      properties:
        resources:
          type: array
          items:
            type: string
        generative_model:
          type: string
        summary_kind:
          type: string
          enum:
          - simple
          - extended
    FindResults:
      type: object
      properties:
        resources:
          type: object
          description: Resources keyed by id, each with scored matching paragraphs.
        relations:
          type: object
        total:
          type: integer
        next_page:
          type: boolean
    AskRequest:
      type: object
      required:
      - query
      properties:
        query:
          type: string
          description: The natural-language question to answer.
        context:
          type: array
          description: Prior conversation turns for multi-turn chat.
          items:
            type: object
            properties:
              author:
                type: string
                enum:
                - USER
                - NUCLIA
              text:
                type: string
        filters:
          type: array
          items:
            type: string
        features:
          type: array
          items:
            type: string
            enum:
            - keyword
            - semantic
            - relations
        generative_model:
          type: string
          description: Override the generative model used to produce the answer.
        prompt:
          type: string
          description: Custom prompt template wrapping the retrieved context.
        citations:
          type: boolean
        rephrase:
          type: boolean
        max_tokens:
          type: integer
  parameters:
    Kbid:
      name: kbid
      in: path
      required: true
      description: Unique identifier of the Knowledge Box.
      schema:
        type: string
  securitySchemes:
    apiKey:
      type: apiKey
      in: header
      name: X-NUCLIA-SERVICEACCOUNT
      description: 'Knowledge Box service account API key. Pass as `X-NUCLIA-SERVICEACCOUNT: Bearer <token>`. Reader keys allow search/find/ask, Writer keys allow ingestion and resource modification, Manager keys allow administration. Public search endpoints may be called without a key when the Knowledge Box is public.'
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: OAuth2 / account bearer token obtained from the Nuclia authentication service, used by the dashboard and management endpoints.
    nuaKey:
      type: apiKey
      in: header
      name: X-NUCLIA-NUAKEY
      description: 'Nuclia Understanding API (NUA) key. Pass as `X-NUCLIA-NUAKEY: Bearer <token>` to call the /v1/predict endpoints.'