> 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 # API Reference ## Docs - [SpeechifyAI Build API](https://docs.speechify.ai/build/api-reference/overview.md): SpeechifyAI Build REST API reference. Base URL, Bearer API-key authentication, dated versioning, JSON responses, and endpoints for speech synthesis, streaming, and voice cloning. - [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/guides/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. - [API Limits](https://docs.speechify.ai/build/guides/concepts/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/guides/concepts/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. ## API Docs - API Reference > Text to Speech [Create Speech](https://docs.speechify.ai/build/api-reference/v1/audio/speech.md) - API Reference > Text to Speech [Stream Speech](https://docs.speechify.ai/build/api-reference/v1/audio/stream.md) - API Reference > Text to Speech [Stream Speech With Timestamps](https://docs.speechify.ai/build/api-reference/v1/audio/stream/with-timestamps.md) - API Reference > Text to Speech [Stream Speech From Text Input](https://docs.speechify.ai/build/api-reference/v1/audio/stream/ws.md) - API Reference > Voices [List Voices](https://docs.speechify.ai/build/api-reference/v1/voices/get.md) - API Reference > Voices [Create Voice](https://docs.speechify.ai/build/api-reference/v1/voices/post.md) - API Reference > Voices [Create Consent Challenge](https://docs.speechify.ai/build/api-reference/v1/voices/consent-challenges/post.md) - API Reference > Voices [Get Voice](https://docs.speechify.ai/build/api-reference/v1/voices/-id-/get.md) - API Reference > Voices [Delete Voice](https://docs.speechify.ai/build/api-reference/v1/voices/-id-/delete.md) - API Reference > Voices [Download Voice Sample](https://docs.speechify.ai/build/api-reference/v1/voices/-id-/sample.md) - API Reference > Models [List Models](https://docs.speechify.ai/build/api-reference/v1/audio/models.md) - API Reference > Watermark [Detect Watermark](https://docs.speechify.ai/build/api-reference/v1/audio/watermark/detect.md) - API Reference > Watermark [Verify Watermark](https://docs.speechify.ai/build/api-reference/v1/audio/watermark/verify.md) - API Reference > Projects [List Projects](https://docs.speechify.ai/build/api-reference/v1/projects/get.md) - API Reference > Projects [Create Project](https://docs.speechify.ai/build/api-reference/v1/projects/post.md) - API Reference > Projects [Get Project](https://docs.speechify.ai/build/api-reference/v1/projects/-id-/get.md) - API Reference > Projects [Update Project](https://docs.speechify.ai/build/api-reference/v1/projects/-id-/patch.md) - API Reference > Projects [Delete Project](https://docs.speechify.ai/build/api-reference/v1/projects/-id-/delete.md) - API Reference > Projects [Archive Project](https://docs.speechify.ai/build/api-reference/v1/projects/-id-/archive.md) - API Reference > Projects [Unarchive Project](https://docs.speechify.ai/build/api-reference/v1/projects/-id-/unarchive.md) - API Reference > Projects [Restore Project](https://docs.speechify.ai/build/api-reference/v1/projects/-id-/restore.md) - API Reference > Projects [Project Audit Trail](https://docs.speechify.ai/build/api-reference/v1/projects/-id-/audit.md) - API Reference > Project members [List Project Members](https://docs.speechify.ai/build/api-reference/v1/projects/-id-/members/get.md) - API Reference > Project members [Grant Project Access](https://docs.speechify.ai/build/api-reference/v1/projects/-id-/members/post.md) - API Reference > Project members [Revoke Project Access](https://docs.speechify.ai/build/api-reference/v1/projects/-id-/members/-user-id-/delete.md) - API Reference > Webhooks [Create webhook endpoint](https://docs.speechify.ai/build/api-reference/v1/webhooks/endpoints/post.md) - API Reference > Webhooks [List webhook endpoints](https://docs.speechify.ai/build/api-reference/v1/webhooks/endpoints/get.md) - API Reference > Webhooks [Get webhook endpoint](https://docs.speechify.ai/build/api-reference/v1/webhooks/endpoints/-id-/get.md) - API Reference > Webhooks [Update webhook endpoint](https://docs.speechify.ai/build/api-reference/v1/webhooks/endpoints/-id-/patch.md) - API Reference > Webhooks [Delete webhook endpoint](https://docs.speechify.ai/build/api-reference/v1/webhooks/endpoints/-id-/delete.md) - API Reference > Webhooks [Rotate webhook endpoint secret](https://docs.speechify.ai/build/api-reference/v1/webhooks/endpoints/-id-/rotate-secret.md) - API Reference > Webhooks [List webhook endpoint deliveries](https://docs.speechify.ai/build/api-reference/v1/webhooks/endpoints/-id-/deliveries.md) - API Reference > Workspace [Get Workspace Entitlements](https://docs.speechify.ai/build/api-reference/v1/workspaces/current/entitlements.md) ## OpenAPI Specification The raw OpenAPI 3.1 specification for this API is available at: - [OpenAPI JSON](https://docs.speechify.ai/build/api-reference/openapi.json) - [OpenAPI YAML](https://docs.speechify.ai/build/api-reference/openapi.yaml) ## AsyncAPI Specification The raw AsyncAPI 2.6.0 specification for the WebSocket channels is available at: - [AsyncAPI JSON](https://docs.speechify.ai/build/api-reference/asyncapi.json) - [AsyncAPI YAML](https://docs.speechify.ai/build/api-reference/asyncapi.yaml)