Telnyx Pronunciation Dictionaries API

openapi: 3.1.0
info:
  contact:
    email: support@telnyx.com
  description: Telnyx provides global communications and connectivity APIs for developers — including SIP trunking, programmable voice, SMS, MMS, WhatsApp Business Messaging, Call Control, Fax, Wireless (IoT & eSIM), Phone Numbers (DID provisioning & porting), Emergency Services, and Network APIs for private interconnects and edge connectivity. Build, scale, and manage voice, messaging, and data networks with Telnyx's carrier-grade global infrastructure and API-first platform.
  title: Telnyx Access Tokens Pronunciation Dictionaries API
  version: 2.0.0
  x-endpoint-cost: light
servers:
- description: Version 2.0.0 of the Telnyx API
  url: https://api.telnyx.com/v2
security:
- bearerAuth: []
tags:
- description: Manage pronunciation dictionaries for text-to-speech synthesis. Dictionaries contain alias items (text replacement) and phoneme items (IPA pronunciation notation) that control how specific words are spoken.
  name: Pronunciation Dictionaries
paths:
  /pronunciation_dicts:
    get:
      description: List all pronunciation dictionaries for the authenticated organization. Results are paginated using offset-based pagination.
      operationId: ListPronunciationDicts
      parameters:
      - description: Page number (1-based). Defaults to 1.
        in: query
        name: page[number]
        required: false
        schema:
          default: 1
          minimum: 1
          type: integer
      - description: Number of results per page. Defaults to 20, maximum 250.
        in: query
        name: page[size]
        required: false
        schema:
          default: 20
          maximum: 250
          minimum: 1
          type: integer
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PronunciationDictListResponse'
          description: A paginated list of pronunciation dictionaries.
        '400':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/pronunciation-dicts_ErrorResponse'
          description: Invalid pagination parameters.
        '401':
          description: Unauthorized. Invalid or missing API key.
      summary: List pronunciation dictionaries
      tags:
      - Pronunciation Dictionaries
      x-latency-category: interactive
    post:
      description: 'Create a new pronunciation dictionary for the authenticated organization. Each dictionary contains a list of items that control how specific words are spoken. Items can be alias type (text replacement) or phoneme type (IPA pronunciation notation).


        As an alternative to providing items directly as JSON, you can upload a dictionary file (PLS/XML or plain text format, max 1MB) using multipart/form-data. PLS files use the standard W3C Pronunciation Lexicon Specification XML format. Text files use a line-based format: `word=alias` for aliases, `word:/phoneme/` for IPA phonemes.


        Limits:

        - Maximum 50 dictionaries per organization

        - Maximum 100 items per dictionary

        - Text: max 200 characters

        - Alias/phoneme value: max 500 characters

        - File upload: max 1MB (1,048,576 bytes)'
      operationId: CreatePronunciationDict
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreatePronunciationDictRequest'
          multipart/form-data:
            schema:
              properties:
                file:
                  description: 'Dictionary file to upload. Supported formats: PLS/XML (.pls, .xml) and plain text (.txt). Max size: 1MB (1,048,576 bytes).'
                  format: binary
                  type: string
                name:
                  description: Human-readable name. Must be unique within the organization.
                  example: Brand Names
                  maxLength: 255
                  minLength: 1
                  type: string
              required:
              - name
              - file
              type: object
        required: true
      responses:
        '201':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PronunciationDictResponse'
          description: Pronunciation dictionary created successfully.
        '401':
          description: Unauthorized. Invalid or missing API key.
        '422':
          content:
            application/json:
              examples:
                duplicate_name:
                  summary: Duplicate dictionary name
                  value:
                    errors:
                    - code: '90202'
                      detail: organization_id, name a dictionary with this name already exists
                      source:
                        pointer: /organization_id, name
                      title: Validation failed
                limit_exceeded:
                  summary: Organization limit exceeded
                  value:
                    errors:
                    - code: '90203'
                      detail: Maximum number of pronunciation dictionaries (50) reached
                      source:
                        pointer: /
                      title: Limit exceeded
                validation_error:
                  summary: Validation failed
                  value:
                    errors:
                    - code: '90202'
                      detail: items must have at least one item
                      source:
                        pointer: /items
                      title: Validation failed
              schema:
                $ref: '#/components/schemas/pronunciation-dicts_ErrorResponse'
          description: Validation error or organization limit exceeded.
      summary: Create a pronunciation dictionary
      tags:
      - Pronunciation Dictionaries
      x-latency-category: interactive
  /pronunciation_dicts/{id}:
    delete:
      description: Permanently delete a pronunciation dictionary.
      operationId: DeletePronunciationDict
      parameters:
      - $ref: '#/components/parameters/pronunciation_dict_id'
      responses:
        '204':
          description: Dictionary deleted successfully. No content returned.
        '401':
          description: Unauthorized. Invalid or missing API key.
        '404':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/pronunciation-dicts_ErrorResponse'
          description: Pronunciation dictionary not found.
      summary: Delete a pronunciation dictionary
      tags:
      - Pronunciation Dictionaries
      x-latency-category: interactive
    get:
      description: Retrieve a single pronunciation dictionary by ID.
      operationId: GetPronunciationDict
      parameters:
      - $ref: '#/components/parameters/pronunciation_dict_id'
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PronunciationDictResponse'
          description: The requested pronunciation dictionary.
        '401':
          description: Unauthorized. Invalid or missing API key.
        '404':
          content:
            application/json:
              example:
                errors:
                - code: '90201'
                  detail: The requested pronunciation dictionary does not exist
                  title: Pronunciation dictionary not found
              schema:
                $ref: '#/components/schemas/pronunciation-dicts_ErrorResponse'
          description: Pronunciation dictionary not found.
      summary: Get a pronunciation dictionary
      tags:
      - Pronunciation Dictionaries
      x-latency-category: interactive
    patch:
      description: Update the name and/or items of an existing pronunciation dictionary. Uses optimistic locking — if the dictionary was modified concurrently, the request returns 409 Conflict.
      operationId: UpdatePronunciationDict
      parameters:
      - $ref: '#/components/parameters/pronunciation_dict_id'
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/UpdatePronunciationDictRequest'
        required: true
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PronunciationDictResponse'
          description: Pronunciation dictionary updated successfully.
        '401':
          description: Unauthorized. Invalid or missing API key.
        '404':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/pronunciation-dicts_ErrorResponse'
          description: Pronunciation dictionary not found.
        '409':
          content:
            application/json:
              example:
                errors:
                - code: '90200'
                  detail: Dictionary was modified concurrently, please retry
                  title: Pronunciation dictionary error
              schema:
                $ref: '#/components/schemas/pronunciation-dicts_ErrorResponse'
          description: Conflict. The dictionary was modified concurrently. Re-fetch and retry.
        '422':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/pronunciation-dicts_ErrorResponse'
          description: Validation error.
      summary: Update a pronunciation dictionary
      tags:
      - Pronunciation Dictionaries
      x-latency-category: interactive
components:
  schemas:
    PronunciationDictAliasItem:
      additionalProperties: false
      description: An alias pronunciation item. When the `text` value is found in input, it is replaced with the `alias` before speech synthesis.
      properties:
        alias:
          description: The replacement text that will be spoken instead.
          example: tel-nicks
          maxLength: 500
          minLength: 1
          type: string
        text:
          description: The text to match in the input. Case-insensitive matching is used during synthesis.
          example: Telnyx
          maxLength: 200
          minLength: 1
          type: string
        type:
          description: The item type.
          enum:
          - alias
          example: alias
          type: string
      required:
      - text
      - type
      - alias
      type: object
    PronunciationDictResponse:
      description: Response containing a single pronunciation dictionary.
      properties:
        data:
          $ref: '#/components/schemas/PronunciationDictData'
      type: object
    pronunciation-dicts_ErrorResponse:
      description: Standard Telnyx error response.
      properties:
        errors:
          items:
            $ref: '#/components/schemas/ErrorObject'
          type: array
      type: object
    PronunciationDictItem:
      description: A single pronunciation dictionary item. Use type 'alias' to replace matched text with a spoken alias, or type 'phoneme' to specify exact pronunciation using IPA notation.
      discriminator:
        mapping:
          alias: '#/components/schemas/PronunciationDictAliasItem'
          phoneme: '#/components/schemas/PronunciationDictPhonemeItem'
        propertyName: type
      oneOf:
      - $ref: '#/components/schemas/PronunciationDictAliasItem'
      - $ref: '#/components/schemas/PronunciationDictPhonemeItem'
    ErrorObject:
      properties:
        code:
          description: Machine-readable error code.
          example: '90202'
          type: string
        detail:
          description: Detailed error description.
          example: items must have at least one item
          type: string
        source:
          description: Source of the error.
          properties:
            pointer:
              description: JSON pointer to the field that caused the error.
              example: /items
              type: string
          type: object
        title:
          description: Short human-readable error title.
          example: Validation failed
          type: string
      type: object
    PronunciationDictPhonemeItem:
      additionalProperties: false
      description: A phoneme pronunciation item. When the `text` value is found in input, it is pronounced using the specified IPA phoneme notation.
      properties:
        alphabet:
          description: The phonetic alphabet used for the phoneme notation.
          enum:
          - ipa
          example: ipa
          type: string
        phoneme:
          description: The phoneme notation representing the desired pronunciation.
          example: ˈtɛl.nɪks
          maxLength: 500
          minLength: 1
          type: string
        text:
          description: The text to match in the input. Case-insensitive matching is used during synthesis.
          example: Telnyx
          maxLength: 200
          minLength: 1
          type: string
        type:
          description: The item type.
          enum:
          - phoneme
          example: phoneme
          type: string
      required:
      - text
      - type
      - phoneme
      - alphabet
      type: object
    PronunciationDictData:
      description: A pronunciation dictionary record.
      properties:
        created_at:
          description: ISO 8601 timestamp with millisecond precision.
          example: '2026-03-25T12:00:00.000Z'
          format: date-time
          type: string
        id:
          description: Unique identifier for the pronunciation dictionary.
          example: c215a3e1-be41-4701-97e8-1d3c22f9a5b7
          format: uuid
          type: string
        items:
          description: List of pronunciation items (alias or phoneme type).
          items:
            $ref: '#/components/schemas/PronunciationDictItem'
          type: array
        name:
          description: Human-readable name for the dictionary. Must be unique within the organization.
          example: Brand Names
          type: string
        record_type:
          description: Identifies the resource type.
          enum:
          - pronunciation_dict
          example: pronunciation_dict
          type: string
        updated_at:
          description: ISO 8601 timestamp with millisecond precision.
          example: '2026-03-25T12:00:00.000Z'
          format: date-time
          type: string
        version:
          description: Auto-incrementing version number. Increases by 1 on each update. Used for optimistic concurrency control and cache invalidation.
          example: 1
          type: integer
      type: object
    PronunciationDictListResponse:
      description: Paginated list of pronunciation dictionaries.
      properties:
        data:
          description: Array of pronunciation dictionary objects.
          items:
            $ref: '#/components/schemas/PronunciationDictData'
          type: array
        meta:
          $ref: '#/components/schemas/pronunciation-dicts_PaginationMeta'
      type: object
    pronunciation-dicts_PaginationMeta:
      description: Pagination metadata returned with list responses.
      properties:
        page_number:
          description: Current page number (1-based).
          example: 1
          type: integer
        page_size:
          description: Number of results per page.
          example: 20
          type: integer
        total_pages:
          description: Total number of pages.
          example: 1
          type: integer
        total_results:
          description: Total number of results across all pages.
          example: 3
          type: integer
      type: object
    UpdatePronunciationDictRequest:
      description: Request body for updating a pronunciation dictionary. At least one field must be provided.
      minProperties: 1
      properties:
        items:
          description: Updated list of pronunciation items (alias or phoneme type).
          items:
            $ref: '#/components/schemas/PronunciationDictItem'
          maxItems: 100
          minItems: 1
          type: array
        name:
          description: Updated dictionary name.
          example: Updated Brand Names
          maxLength: 255
          minLength: 1
          type: string
      type: object
    CreatePronunciationDictRequest:
      description: Request body for creating a pronunciation dictionary.
      properties:
        items:
          description: List of pronunciation items (alias or phoneme type). At least one item is required.
          items:
            $ref: '#/components/schemas/PronunciationDictItem'
          maxItems: 100
          minItems: 1
          type: array
        name:
          description: Human-readable name. Must be unique within the organization.
          example: Brand Names
          maxLength: 255
          minLength: 1
          type: string
      required:
      - name
      - items
      type: object
  parameters:
    pronunciation_dict_id:
      description: The UUID of the pronunciation dictionary.
      in: path
      name: id
      required: true
      schema:
        example: c215a3e1-be41-4701-97e8-1d3c22f9a5b7
        format: uuid
        type: string
  securitySchemes:
    bearerAuth:
      scheme: bearer
      type: http
    branded-calling_bearerAuth:
      description: API key passed as a Bearer token in the Authorization header
      scheme: bearer
      type: http
    oauthClientAuth:
      description: OAuth 2.0 authentication for Telnyx API and MCP integrations
      flows:
        authorizationCode:
          authorizationUrl: https://api.telnyx.com/v2/oauth/authorize
          refreshUrl: https://api.telnyx.com/v2/oauth/token
          scopes:
            admin: Administrative access to Telnyx resources
          tokenUrl: https://api.telnyx.com/v2/oauth/token
        clientCredentials:
          scopes:
            admin: Administrative access to Telnyx resources
          tokenUrl: https://api.telnyx.com/v2/oauth/token
      type: oauth2
    outbound-voice-profiles_bearerAuth:
      bearerFormat: JWT
      scheme: bearer
      type: http
    pronunciation-dicts_bearerAuth:
      description: Telnyx API v2 key. Obtain from https://portal.telnyx.com
      scheme: bearer
      type: http
    stored-payment-transactions_bearerAuth:
      bearerFormat: JWT
      scheme: bearer
      type: http