International Business Machines

International Business Machines Synthesis API

Synthesize text to audio.

Documentation GitHub OpenAPI

Operations 1

POST /v1/synthesize International Business Machines Synthesize audio #

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this

find_apisBrowse and filter every API in the catalog.
get_api_artifactsOne API's artifacts, grouped by type.
get_openapiThe primary OpenAPI for this API.
find_similar_apisAPIs that look like this one.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This API

curl "https://apis.io/api/v1/apis/international-business-machines-synthesis-api"

All apis

curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

openapi: 3.2.0
info:
  title: International Business Machines IBM Text to Speech Synthesis API
  description: The IBM Text to Speech API provides speech-synthesis capabilities to convert written text into natural-sounding speech in a variety of languages, dialects, and voices. It supports SSML input and multiple audio formats.
  version: 1.0.0
  contact:
    name: IBM Cloud
    url: https://cloud.ibm.com/apidocs/text-to-speech
  license:
    name: IBM Cloud Terms
    url: https://www.ibm.com/terms
servers:
- url: https://api.us-south.text-to-speech.watson.cloud.ibm.com
  description: US South (Dallas)
- url: https://api.eu-de.text-to-speech.watson.cloud.ibm.com
  description: EU Central (Frankfurt)
security:
- bearerAuth: []
tags:
- name: Synthesis
  description: Synthesize text to audio.
paths:
  /v1/synthesize:
    post:
      operationId: synthesize
      summary: International Business Machines Synthesize audio
      description: Synthesize text to audio. Returns the audio in the specified format.
      tags:
      - Synthesis
      parameters:
      - name: Accept
        in: header
        schema:
          type: string
          enum:
          - audio/wav
          - audio/mp3
          - audio/ogg
          - audio/flac
      - name: voice
        in: query
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - text
              properties:
                text:
                  type: string
      responses:
        '200':
          description: Successful synthesis
          content:
            audio/wav:
              schema:
                type: string
                format: binary
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: IAM Token

International Business Machines Synthesis API

Operations 1

Documentation

Specifications

Schemas & Data

Other Resources