Nuclia Search API

openapi: 3.2.0
info:
  title: Nuclia RAG-as-a-Service Search 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: Search
  description: Hybrid search, find (RAG retrieval) and suggest over a Knowledge Box.
paths:
  /v1/kb/{kbid}/search:
    post:
      operationId: search
      tags:
      - Search
      summary: Search a Knowledge Box
      description: Run a hybrid search (semantic + keyword + fulltext) across a Knowledge Box and return matching resources, paragraphs and sentences.
      parameters:
      - $ref: '#/components/parameters/Kbid'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SearchRequest'
      responses:
        '200':
          description: Search results
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SearchResults'
  /v1/kb/{kbid}/find:
    post:
      operationId: find
      tags:
      - Search
      summary: Find in a Knowledge Box
      description: Run a find query - the search variant optimized for RAG context retrieval - returning results grouped and scored by resource and paragraph, including optional graph search.
      parameters:
      - $ref: '#/components/parameters/Kbid'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SearchRequest'
      responses:
        '200':
          description: Find results
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/FindResults'
  /v1/kb/{kbid}/suggest:
    get:
      operationId: suggest
      tags:
      - Search
      summary: Suggest on a Knowledge Box
      description: Return autocomplete suggestions and entity matches for a partial query.
      parameters:
      - $ref: '#/components/parameters/Kbid'
      - name: query
        in: query
        required: true
        schema:
          type: string
      responses:
        '200':
          description: Suggestions
          content:
            application/json:
              schema:
                type: object
components:
  schemas:
    SearchResults:
      type: object
      properties:
        resources:
          type: object
        sentences:
          type: object
        paragraphs:
          type: object
        relations:
          type: object
        next_page:
          type: boolean
    SearchRequest:
      type: object
      required:
      - query
      properties:
        query:
          type: string
          description: The natural-language or keyword query.
        features:
          type: array
          description: Search features to enable (keyword, semantic, relations, fulltext).
          items:
            type: string
            enum:
            - keyword
            - semantic
            - relations
            - fulltext
        filters:
          type: array
          description: Label / metadata filters to constrain results.
          items:
            type: string
        page_number:
          type: integer
        page_size:
          type: integer
        min_score:
          type: number
        rephrase:
          type: boolean
    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
  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.'