Unbabel Machine Translation API

openapi: 3.0.3
info:
  title: Unbabel Translation API
  description: >-
    The Unbabel Translation API (tapi/v2) is an asynchronous REST API for the
    Unbabel Language Operations (LangOps) platform. Callers submit text with a
    source/target language pair, tone, and topic; Unbabel returns a job
    identifier (uid) immediately and processes the translation with always-on AI
    plus optional human review. Results are retrieved by uid, by listing jobs by
    status, or delivered to a callback URL. The API also exposes a pure
    machine-translation path (mt_translation) and helper resources for language
    pairs, tones, topics, word count, and account details.

    Authentication uses a token header of the form
    `Authorization: ApiKey <username>:<api_key>`. The production base URL is
    https://api.unbabel.com/tapi/v2 and a sandbox is available at
    https://sandbox.unbabel.com/tapi/v2. Endpoints for translation,
    mt_translation, language_pair, tone, topic, account, and wordcount are
    confirmed from Unbabel's public developer docs and the official unbabel-py
    client; the asynchronous callback (webhook) payload is modeled from the
    documented callback behavior.
  version: '2.0'
  contact:
    name: Unbabel Developers
    url: https://developers.unbabel.com
servers:
  - url: https://api.unbabel.com/tapi/v2
    description: Production
  - url: https://sandbox.unbabel.com/tapi/v2
    description: Sandbox
security:
  - apiKeyAuth: []
tags:
  - name: Translation
    description: Submit and manage AI-plus-human translation jobs.
  - name: Machine Translation
    description: Pure machine-translation jobs, optionally upgradeable to human review.
  - name: Language Pairs
    description: Supported source-to-target language combinations.
  - name: Tone and Topic
    description: Available tones and topics/domains for a translation.
  - name: Word Count
    description: Billable word count calculation for a block of text.
  - name: Account
    description: Authenticated customer account information.
paths:
  /translation/:
    get:
      operationId: listTranslations
      tags:
        - Translation
      summary: List translations
      description: Lists translation jobs, optionally filtered by status.
      parameters:
        - name: status
          in: query
          required: false
          schema:
            type: string
            enum: [new, accepted, translating, delivered, canceled, failed]
          description: Filter jobs by their current status.
      responses:
        '200':
          description: A list of translation jobs.
          content:
            application/json:
              schema:
                type: object
                properties:
                  objects:
                    type: array
                    items:
                      $ref: '#/components/schemas/Translation'
        '401':
          $ref: '#/components/responses/Unauthorized'
    post:
      operationId: createTranslation
      tags:
        - Translation
      summary: Submit a translation
      description: >-
        Asynchronously submits text for translation. Returns immediately with the
        job uid and status; the completed translation is retrieved later by uid or
        delivered to the optional callback_url.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/TranslationRequest'
      responses:
        '201':
          description: The created translation job.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Translation'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
    patch:
      operationId: bulkUpdateTranslations
      tags:
        - Translation
      summary: Bulk translation operations
      description: Submits or updates multiple translation jobs in a single request.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                objects:
                  type: array
                  items:
                    $ref: '#/components/schemas/TranslationRequest'
      responses:
        '202':
          description: Bulk request accepted.
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /translation/{uid}/:
    get:
      operationId: getTranslation
      tags:
        - Translation
      summary: Retrieve a translation
      description: Retrieves a single translation job by its uid.
      parameters:
        - name: uid
          in: path
          required: true
          schema:
            type: string
          description: The unique identifier of the translation job.
      responses:
        '200':
          description: The requested translation job.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Translation'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /mt_translation/:
    get:
      operationId: listMachineTranslations
      tags:
        - Machine Translation
      summary: List machine translations
      description: Lists machine-translation jobs, optionally filtered by status.
      parameters:
        - name: status
          in: query
          required: false
          schema:
            type: string
          description: Filter machine-translation jobs by status.
      responses:
        '200':
          description: A list of machine-translation jobs.
          content:
            application/json:
              schema:
                type: object
                properties:
                  objects:
                    type: array
                    items:
                      $ref: '#/components/schemas/Translation'
        '401':
          $ref: '#/components/responses/Unauthorized'
    post:
      operationId: createMachineTranslation
      tags:
        - Machine Translation
      summary: Submit a machine translation
      description: Submits text for pure machine translation with no human review.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/TranslationRequest'
      responses:
        '201':
          description: The created machine-translation job.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Translation'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /mt_translation/{uid}/:
    get:
      operationId: getMachineTranslation
      tags:
        - Machine Translation
      summary: Retrieve a machine translation
      description: Retrieves a single machine-translation job by its uid.
      parameters:
        - name: uid
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: The requested machine-translation job.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Translation'
        '404':
          $ref: '#/components/responses/NotFound'
    patch:
      operationId: upgradeMachineTranslation
      tags:
        - Machine Translation
      summary: Upgrade a machine translation
      description: >-
        Upgrades an existing machine-translation job to a full human-reviewed
        translation.
      parameters:
        - name: uid
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: The upgraded translation job.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Translation'
        '404':
          $ref: '#/components/responses/NotFound'
  /language_pair/:
    get:
      operationId: listLanguagePairs
      tags:
        - Language Pairs
      summary: List language pairs
      description: >-
        Lists the supported source-to-target language pairs, optionally filtered
        by a set of training languages.
      parameters:
        - name: train_langs
          in: query
          required: false
          schema:
            type: string
          description: Comma-separated language codes to filter the returned pairs.
      responses:
        '200':
          description: A list of supported language pairs.
          content:
            application/json:
              schema:
                type: object
                properties:
                  objects:
                    type: array
                    items:
                      $ref: '#/components/schemas/LanguagePair'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /tone/:
    get:
      operationId: listTones
      tags:
        - Tone and Topic
      summary: List tones
      description: Lists the tones available for a translation, such as formal or friendly.
      responses:
        '200':
          description: A list of available tones.
          content:
            application/json:
              schema:
                type: object
                properties:
                  objects:
                    type: array
                    items:
                      $ref: '#/components/schemas/Tone'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /topic/:
    get:
      operationId: listTopics
      tags:
        - Tone and Topic
      summary: List topics
      description: Lists the topics/domains available to provide subject-matter context.
      responses:
        '200':
          description: A list of available topics.
          content:
            application/json:
              schema:
                type: object
                properties:
                  objects:
                    type: array
                    items:
                      $ref: '#/components/schemas/Topic'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /wordcount/:
    post:
      operationId: calculateWordCount
      tags:
        - Word Count
      summary: Calculate word count
      description: Calculates the billable word count for a block of text.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
                - text
              properties:
                text:
                  type: string
                  description: The text whose words should be counted.
                text_format:
                  type: string
                  enum: [text, html, xliff]
                  default: text
      responses:
        '200':
          description: The calculated word count.
          content:
            application/json:
              schema:
                type: object
                properties:
                  word_count:
                    type: integer
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /account/:
    get:
      operationId: getAccount
      tags:
        - Account
      summary: Retrieve account
      description: Retrieves the authenticated customer account's information and balance.
      responses:
        '200':
          description: The account details for the authenticated credentials.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Account'
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  securitySchemes:
    apiKeyAuth:
      type: apiKey
      in: header
      name: Authorization
      description: >-
        Token authentication of the form `Authorization: ApiKey
        <username>:<api_key>`.
  responses:
    BadRequest:
      description: The request was malformed or missing required parameters.
    Unauthorized:
      description: Missing or invalid API credentials.
    NotFound:
      description: The requested resource was not found.
  schemas:
    TranslationRequest:
      type: object
      required:
        - text
        - source_language
        - target_language
      properties:
        text:
          type: string
          description: The source text to translate.
        source_language:
          type: string
          description: Source language code (for example en).
        target_language:
          type: string
          description: Target language code (for example pt).
        text_format:
          type: string
          enum: [text, html, xliff]
          default: text
        tone:
          type: string
          description: Optional tone/register for the translation.
        topic:
          type: string
          description: Optional topic/domain for subject-matter context.
        callback_url:
          type: string
          format: uri
          description: >-
            Optional HTTP endpoint Unbabel will POST a notification to when the
            job status changes.
        instructions:
          type: string
          description: Optional free-text instructions for the translator.
    Translation:
      type: object
      properties:
        uid:
          type: string
          description: Unique identifier of the translation job.
        status:
          type: string
          description: Current job status (new, accepted, translating, delivered, etc.).
        text:
          type: string
          description: The original source text.
        translatedText:
          type: string
          description: The translated text, present once the job is delivered.
        source_language:
          type: string
        target_language:
          type: string
        text_format:
          type: string
        tone:
          type: string
        topic:
          type: string
        price:
          type: number
          description: Price of the translation job.
        wordcount:
          type: integer
        callback_url:
          type: string
          format: uri
    LanguagePair:
      type: object
      properties:
        lang_pair:
          type: object
          properties:
            source_language:
              $ref: '#/components/schemas/Language'
            target_language:
              $ref: '#/components/schemas/Language'
    Language:
      type: object
      properties:
        name:
          type: string
        shortname:
          type: string
    Tone:
      type: object
      properties:
        name:
          type: string
        description:
          type: string
    Topic:
      type: object
      properties:
        name:
          type: string
    Account:
      type: object
      properties:
        username:
          type: string
        email:
          type: string
        balance:
          type: number
          description: Remaining prepaid balance or credit on the account.
    Notification:
      type: object
      description: >-
        Modeled payload POSTed to a job's callback_url when its status changes.
        Shape inferred from documented callback behavior, not a published schema.
      properties:
        uid:
          type: string
        status:
          type: string
        translatedText:
          type: string