> 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-3.5` (48 languages under one id, English included; recommended), `simba-3.2` (English) 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

# Get started

## Docs

- [Get started](https://docs.speechify.ai/build/api-reference/get-started/introduction.md): Set up on the SpeechifyAI Build API: authenticate with a Bearer key and understand character, rate, and concurrency limits per plan.
- [Authentication](https://docs.speechify.ai/build/api-reference/get-started/authentication.md): Authenticate Speechify API requests with a Bearer API key. Get and rotate keys in the console, store them securely, and use a server-side proxy for frontends.
- [Regions](https://docs.speechify.ai/build/api-reference/get-started/regions.md): How the Speechify API routes text-to-speech requests between regions. Pin synthesis to Europe with eu.api.speechify.ai or to US East with us.api.speechify.ai. A model with no capacity in the region runs in the nearest region that has it. Regions are not data residency.
- [API Limits](https://docs.speechify.ai/build/api-reference/get-started/api-limits.md): Speechify API rate limits and concurrency limits by plan (Free through Enterprise), plus per-endpoint character limits. Every /v1/audio synthesis endpoint shares one per-account rate and concurrency budget. Includes 429 Too Many Requests handling with Retry-After, rate_limited, and concurrency_limit_reached.
- [Spend Limits](https://docs.speechify.ai/build/api-reference/get-started/spend-limits.md): Set a monthly USD spend limit on any Speechify API key. Requests are refused with 402 spend_cap_exceeded once the key reaches its limit; the limit resets each calendar month.