openapi: 3.0.3
info:
  title: D&B Direct+ Authentication Identity Resolution API
  description: D&B Direct+ is Dun & Bradstreet's RESTful API platform that exposes the D&B Data Cloud — more than 500 million companies worldwide — for identity resolution, search, enrichment, multi-process (match plus enrich), batch processing, change monitoring, and historical research. All endpoints return JSON, are versioned in the URI path, and require an OAuth 2.0 bearer token obtained from the /v3/token endpoint via client-credentials grant. This profile is an OpenAPI sketch of the public surface based on Dun & Bradstreet's published Direct+ documentation; the canonical operation definitions live behind the gated developer portal at https://directplus.documentation.dnb.com/.
  version: '3.0'
  contact:
    name: D&B Direct+ Support
    url: https://service.dnb.com/
  termsOfService: https://www.dnb.com/utility-pages/terms-of-use.html
  license:
    name: Proprietary
    url: https://www.dnb.com/utility-pages/terms-of-use.html
servers:
- url: https://plus.dnb.com
  description: Production
tags:
- name: Identity Resolution
  description: Match an input record to a D-U-N-S Number.
paths:
  /v1/match/cleanseMatch:
    get:
      tags:
      - Identity Resolution
      summary: Match Candidate To D-U-N-S Number
      description: Submit a candidate business record (name, address, registration number, phone, email) and receive a ranked list of D-U-N-S Number matches with match-grade, confidence-code, and quality indicators suitable for auto-acceptance or manual review.
      operationId: cleanseMatch
      security:
      - bearerAuth: []
      parameters:
      - name: name
        in: query
        required: true
        schema:
          type: string
        description: Business name as supplied by the caller.
      - name: countryISOAlpha2Code
        in: query
        required: true
        schema:
          type: string
          minLength: 2
          maxLength: 2
        description: ISO 3166-1 alpha-2 country code.
      - name: streetAddressLine1
        in: query
        schema:
          type: string
      - name: addressLocality
        in: query
        schema:
          type: string
      - name: addressRegion
        in: query
        schema:
          type: string
      - name: postalCode
        in: query
        schema:
          type: string
      - name: telephoneNumber
        in: query
        schema:
          type: string
      - name: registrationNumber
        in: query
        schema:
          type: string
      - name: candidateMaximumQuantity
        in: query
        schema:
          type: integer
          minimum: 1
          maximum: 50
          default: 9
      - name: confidenceLowerLevelThresholdValue
        in: query
        schema:
          type: integer
          minimum: 1
          maximum: 10
      responses:
        '200':
          description: Ranked match candidates returned.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/MatchResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
components:
  responses:
    NotFound:
      description: Resource not found for the supplied identifier.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    Unauthorized:
      description: Missing or invalid bearer token.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  schemas:
    OrganizationSummary:
      type: object
      properties:
        duns:
          type: string
          pattern: ^[0-9]{9}$
        primaryName:
          type: string
        primaryAddress:
          $ref: '#/components/schemas/Address'
        countryISOAlpha2Code:
          type: string
        telephone:
          type: array
          items:
            type: object
            properties:
              telephoneNumber:
                type: string
        registrationNumbers:
          type: array
          items:
            type: object
            properties:
              registrationNumber:
                type: string
              typeDescription:
                type: string
    Error:
      type: object
      properties:
        transactionDetail:
          $ref: '#/components/schemas/TransactionDetail'
        error:
          type: object
          properties:
            errorMessage:
              type: string
            errorCode:
              type: string
            errorDetails:
              type: array
              items:
                type: object
    Address:
      type: object
      properties:
        streetAddress:
          type: object
          properties:
            line1:
              type: string
            line2:
              type: string
        addressLocality:
          type: object
          properties:
            name:
              type: string
        addressRegion:
          type: object
          properties:
            name:
              type: string
            abbreviatedName:
              type: string
        postalCode:
          type: string
        addressCountry:
          type: object
          properties:
            isoAlpha2Code:
              type: string
    TransactionDetail:
      type: object
      properties:
        transactionID:
          type: string
        transactionTimestamp:
          type: string
          format: date-time
        inLanguage:
          type: string
        serviceVersion:
          type: string
    MatchResponse:
      type: object
      properties:
        transactionDetail:
          $ref: '#/components/schemas/TransactionDetail'
        inquiryDetail:
          type: object
        matchCandidates:
          type: array
          items:
            $ref: '#/components/schemas/MatchCandidate'
    MatchCandidate:
      type: object
      properties:
        displaySequence:
          type: integer
        matchQualityInformation:
          type: object
          properties:
            confidenceCode:
              type: integer
            matchGrade:
              type: string
            matchDataProfile:
              type: string
        organization:
          $ref: '#/components/schemas/OrganizationSummary'
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
    basicAuth:
      type: http
      scheme: basic