aid: podcastle
url: https://raw.githubusercontent.com/api-evangelist/podcastle/refs/heads/main/apis.yml
name: Podcastle
kind: company
description: Podcastle is an AI audio and podcast creation platform whose developer
  engine, Async, exposes a low-latency Voice API for human-like text-to-speech, a
  browsable voice library, and instant voice cloning from a short audio sample. The
  API is served from https://api.async.com and authenticated with an x-api-key
  header plus a version header. Transcription is a Podcastle platform feature; no
  standalone transcription endpoint is documented in the public Voice API.
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- AI
- Audio
- Text to Speech
- Voice Cloning
- Podcasting
created: '2026-06-21'
modified: '2026-06-21'
specificationVersion: '0.19'
apis:
- aid: podcastle:text-to-speech
  name: Podcastle Text-to-Speech API
  tags:
  - Text to Speech
  - Audio
  - Streaming
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://docs.async.com/welcome-to-async-voice-api-990330m0
  baseURL: https://api.async.com
  properties:
  - url: https://docs.async.com/text-to-speech-18760785e0
    type: Documentation
  - url: https://docs.async.com/welcome-to-async-voice-api-990330m0
    type: APIReference
  - url: openapi/podcastle-openapi.yml
    type: OpenAPI
  description: Low-latency, human-like speech synthesis via the Async engine. Batch
    (/text_to_speech), streaming (/text_to_speech/streaming), word-timestamped
    (/text_to_speech/with_timestamps), and WebSocket
    (/text_to_speech/websocket/ws) generation across async_pro_v1.0 and
    async_flash models.
- aid: podcastle:voices
  name: Podcastle Voices API
  tags:
  - Voices
  - Voice Library
  - Catalog
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://docs.async.com/list-voices-16699698e0
  baseURL: https://api.async.com
  properties:
  - url: https://docs.async.com/list-voices-16699698e0
    type: Documentation
  - url: openapi/podcastle-openapi.yml
    type: OpenAPI
  description: Browse the voice library of predefined and custom voices via POST
    /voices, with filters for model, language, accent, gender, and style plus
    cursor-based pagination.
- aid: podcastle:voice-cloning
  name: Podcastle Voice Cloning API
  tags:
  - Voice Cloning
  - Custom Voices
  - Revoice
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://docs.async.com/clone-voice-16699697e0
  baseURL: https://api.async.com
  properties:
  - url: https://docs.async.com/clone-voice-16699697e0
    type: Documentation
  - url: openapi/podcastle-openapi.yml
    type: OpenAPI
  description: Instant voice cloning via POST /voices/clone. Upload a short audio
    sample (wav, mp3, flac, aiff) as multipart/form-data to produce a
    production-ready custom voice with no training step.
- aid: podcastle:transcription
  name: Podcastle Transcription
  tags:
  - Transcription
  - Speech to Text
  - Captions
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://help.podcastle.ai/en/articles/9903954-generating-and-converting-text-to-speech
  baseURL: https://api.async.com
  properties:
  - url: https://async.com/
    type: Documentation
  description: Transcription and speech-to-text are Podcastle platform features
    (multi-language transcription with speaker identification) available in the
    product, console, and credit-based plans. A standalone transcription
    endpoint is not documented in the public Async Voice API as of the catalog
    date; this entry is documented as accurately as the public material allows.
common:
- type: LinkedIn
  url: https://www.linkedin.com/company/podcastle-ai
- type: Website
  url: https://podcastle.ai
- type: Documentation
  url: https://docs.async.com
- type: Plans
  url: plans/podcastle-plans-pricing.yml
- type: RateLimits
  url: rate-limits/podcastle-rate-limits.yml
- type: FinOps
  url: finops/podcastle-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com