Vonage Video API

Vonage Video API Captions API

Start and stop real-time live captions.

Documentation GitHub OpenAPI

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/vonage-video-captions-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 email required.

GitHub Google LinkedIn

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

OpenAPI Specification

openapi: 3.0.1
info:
  title: Vonage Video Archives Captions API
  description: REST API for the Vonage Video platform (formerly OpenTok / TokBox). The Vonage Video Cloud creates and manages real-time video sessions and provides advanced server-side features including archiving (recording), live streaming broadcasts, signaling, moderation, SIP interconnect, live captions, and the Experience Composer render service. Requests are authenticated with a JWT Bearer token generated from your Vonage application credentials.
  termsOfService: https://www.vonage.com/legal/communications-apis/terms-of-use/
  contact:
    name: Vonage Video API Support
    url: https://api.support.vonage.com/hc/en-us
  version: '2.0'
servers:
- url: https://video.api.vonage.com/v2
  description: Vonage Video Cloud REST API
security:
- bearerAuth: []
tags:
- name: Captions
  description: Start and stop real-time live captions.
paths:
  /project/{applicationId}/captions/{captionsId}/start:
    post:
      operationId: startCaptions
      tags:
      - Captions
      summary: Start live captions
      parameters:
      - $ref: '#/components/parameters/ApplicationId'
      - name: captionsId
        in: path
        required: true
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/StartCaptionsRequest'
      responses:
        '202':
          description: Captions started.
  /project/{applicationId}/captions/{captionsId}/stop:
    post:
      operationId: stopCaptions
      tags:
      - Captions
      summary: Stop live captions
      parameters:
      - $ref: '#/components/parameters/ApplicationId'
      - name: captionsId
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: Captions stopped.
components:
  schemas:
    StartCaptionsRequest:
      type: object
      required:
      - sessionId
      - token
      properties:
        sessionId:
          type: string
        token:
          type: string
        languageCode:
          type: string
          default: en-US
        maxDuration:
          type: integer
          default: 14400
        partialCaptions:
          type: boolean
        statusCallbackUrl:
          type: string
  parameters:
    ApplicationId:
      name: applicationId
      in: path
      required: true
      description: The Vonage application ID (formerly OpenTok API key).
      schema:
        type: string
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: A JWT generated from your Vonage application's private key and application ID, sent in the Authorization header.