> Append .md to any page URL for clean Markdown. Index: https://docs.speechify.ai/llms.txt. > > Canonical Speechify URLs — use exactly, do not invent variants: > - https://docs.speechify.ai — this site (API reference, SDKs, quickstarts) > - https://speechify.ai — marketing + product site > - https://platform.speechify.ai — customer dashboard, signup, API keys, billing > - https://api.speechify.ai — API base URL > - https://github.com/Speechify-AI: GitHub org for the API (cookbook, demos, CLI). `github.com/speechify` does not exist. > - https://status.speechify.ai — status + incidents > - https://speechify.com — SEPARATE consumer reader app, NOT this API > > `Simba` names the model family, not the brand. Model ids: `simba-3.2` (English, recommended) and `simba-3.0` (English, German, Spanish, French, Italian and Portuguese; the default). `simba-english` and `simba-multilingual` are retired: a new workspace that sends either gets `400 model_retired`. `SimbaVoice` / `simbavoice.ai` are retired. > > Ask, don't scrape. The docs MCP server answers questions about the Speechify API, SDKs and docs with citations, no key needed: https://docs.speechify.ai/_mcp/server (Streamable HTTP, tool `searchDocs`). Setup: https://docs.speechify.ai/build/guides/get-started/connect-mcp # Changelog ## Entries - [API: `pcm_16000` is 16 kHz audio from version `2026-09-30`](https://docs.speechify.ai/build/changelog/2026/9/30.md) - [API: projects, webhook endpoints and workspace entitlements are in the API reference and SDKs](https://docs.speechify.ai/build/changelog/2026/9/26.md) - [API: voice cloning requires verified consent on every API version](https://docs.speechify.ai/build/changelog/2026/9/23.md) - [API: Simba 1.6 is retired at version `2026-09-21` and served by current models from 2026-11-21](https://docs.speechify.ai/build/changelog/2026/9/21.md) - [API: simba-3.2 serves every English voice](https://docs.speechify.ai/build/changelog/2026/9/8.md) - [API: watermark verification with no credential](https://docs.speechify.ai/build/changelog/2026/8/29.md) - [API: watermark detection with your API key](https://docs.speechify.ai/build/changelog/2026/8/28.md) - [API: `simba-3.2` voice cloning is now self-serve for every workspace](https://docs.speechify.ai/build/changelog/2026/8/26.md) - [API: Projects — group resources, scope credentials, and attribute spend](https://docs.speechify.ai/build/changelog/2026/8/25.md) - [API: default MP3 output is now 128 kbps](https://docs.speechify.ai/build/changelog/2026/8/18.md) - [API: maximum-fidelity mp3, and a fix for the 22.05 kHz formats](https://docs.speechify.ai/build/changelog/2026/8/17.md) - [API: consent recordings are matched against the voice being cloned](https://docs.speechify.ai/build/changelog/2026/8/16.md) - [API: voice cloning now verifies the speaker's consent](https://docs.speechify.ai/build/changelog/2026/8/13.md) - [API: text is screened before synthesis](https://docs.speechify.ai/build/changelog/2026/8/12.md) - [API: `simba-3.2` voice cloning enters limited release](https://docs.speechify.ai/build/changelog/2026/8/6.md) - [API: `simba-3.0` becomes the default; `simba-3.2` is the newest model](https://docs.speechify.ai/build/changelog/2026/8/5.md) - [Models list now reports per-model endpoints and curated-voice flag](https://docs.speechify.ai/build/changelog/2026/7/30.md) - [API: Free tier gets a burst allowance on `/v1/audio/*`](https://docs.speechify.ai/build/changelog/2026/7/27.md) - [API: canonical `Speechify-*` header names (legacy `X-` aliases still work)](https://docs.speechify.ai/build/changelog/2026/7/25.md) - [API: stream speech marks with `POST /v1/audio/stream/with-timestamps`](https://docs.speechify.ai/build/changelog/2026/7/23.md) - [API: `simba-3.0` now synthesizes six European languages](https://docs.speechify.ai/build/changelog/2026/7/22.md) - [API: filter `GET /v1/voices` by type, locale, gender, and model](https://docs.speechify.ai/build/changelog/2026/7/20.md) - [API: published rate & concurrency limits, and a `docs_url` on 429s](https://docs.speechify.ai/build/changelog/2026/7/19.md) - [API: `simba-3.0` now supports cloned/personal voices](https://docs.speechify.ai/build/changelog/2026/7/16.md) - [API: cloned voices on `simba-3.2` (manual approval)](https://docs.speechify.ai/build/changelog/2026/7/10.md) - [API: list available TTS models with `GET /v1/audio/models`](https://docs.speechify.ai/build/changelog/2026/7/9.md) - [API: New `simba-3.2` streaming model (recommended)](https://docs.speechify.ai/build/changelog/2026/7/8.md) - [TTS `output_format` and monthly spend limits on API keys](https://docs.speechify.ai/build/changelog/2026/7/2.md) - [Edge safety limits: rate headers, body-size errors, pre-auth throttling](https://docs.speechify.ai/build/changelog/2026/7/1.md) - [Service accounts, clearer key scopes, and usage attribution](https://docs.speechify.ai/build/changelog/2026/6/30.md) - [API: voice-gender value `notSpecified` is now `not_specified`](https://docs.speechify.ai/build/changelog/2026/6/28.md) - [API: `GET /v1/voices` returns an object envelope](https://docs.speechify.ai/build/changelog/2026/6/27.md) - [`Idempotency-Key` on side-effect API calls](https://docs.speechify.ai/build/changelog/2026/6/26.md) - [API version pinning with `Speechify-Version`](https://docs.speechify.ai/build/changelog/2026/6/25.md) - [Docs: response-streaming behaviour on `POST /v1/audio/stream` clarified](https://docs.speechify.ai/build/changelog/2026/6/23.md) - [API: New `simba-3.0` streaming model](https://docs.speechify.ai/build/changelog/2026/5/9.md) - [February 19, 2026](https://docs.speechify.ai/build/changelog/2026/2/19.md) - [January 26, 2026](https://docs.speechify.ai/build/changelog/2026/1/26.md) - [December 24, 2025](https://docs.speechify.ai/build/changelog/2025/12/24.md) - [API: Added Support for PCM Audio Format](https://docs.speechify.ai/build/changelog/2025/11/5.md) - [April 25, 2025](https://docs.speechify.ai/build/changelog/2025/4/25.md) - [API: Download Personal Voice Sample](https://docs.speechify.ai/build/changelog/2025/4/11.md) - [API: Text Normalization](https://docs.speechify.ai/build/changelog/2025/3/24.md) - [March 21, 2025](https://docs.speechify.ai/build/changelog/2025/3/21.md) - [API: Locale support for personal voices](https://docs.speechify.ai/build/changelog/2025/3/18.md) - [API: Streaming format fallback](https://docs.speechify.ai/build/changelog/2025/3/12.md) - [API: Voices avatar and gender support](https://docs.speechify.ai/build/20250129_voices_avatars_and_gender.md) - [Playground: Added Unpaid Invoice Warning](https://docs.speechify.ai/build/20241206_unpaid_invoice_warning_added.md) - [Playground: Filters added to Voices page](https://docs.speechify.ai/build/20241120_filters_on_voices_page.md) - [Billing: Changed billing cycle start date](https://docs.speechify.ai/build/20240809_change_billing_cycle_start_day.md) - [UI: hiding the Usage tab](https://docs.speechify.ai/build/20240726_playground-hide-usage-tab.md) - [UI: Pitch and Speed Rate controls](https://docs.speechify.ai/build/20240722_pitch_and_rate_ui.md) - [API: Streaming endpoint no longer returns WAV audio](https://docs.speechify.ai/build/20240704_wav_removed_from_stream.md) - [API: loudness normalization option](https://docs.speechify.ai/build/20240702_loudness_normalization_option.md) - [UI: Ongoing redesign](https://docs.speechify.ai/build/20240701_console_redesign.md) - [API: Simba base model deprecated](https://docs.speechify.ai/build/20240620_base_model_deprecation.md) - [API: OAuth 2.0, new authentication mechanism](https://docs.speechify.ai/build/20240605_oauth.md) - [API: Voices APIs changed](https://docs.speechify.ai/build/20240604_voices_api_changes.md) - [API: new model, `simba-turbo`, and Multilingual support](https://docs.speechify.ai/build/20240522_api-new-model-simba-turbo-and-multilingual-support.md) - [API: audio streaming is here](https://docs.speechify.ai/build/20240515_api-audio-streaming-is-here.md) - [API: Changes to the voices list](https://docs.speechify.ai/build/20240513_changes-to-the-voices-list.md) - [API: SSML is no longer mandatory for speech synthesis](https://docs.speechify.ai/build/20240509_api-ssml-is-no-longer-mandatory-for-speech-synthesis.md) - [API: New endpoint to delete cloned voices](https://docs.speechify.ai/build/20240507_api-new-endpoint-to-delete-cloned-voices.md) - [Playground: system voices preview](https://docs.speechify.ai/build/changelog/2024/5/2.md)