--- title: "ElevenLabs API Agent TTS effects schema removes deprecated seed: 2026-10-19 | Harbyn" description: "ElevenLabs API Agent TTS effects schema removes deprecated seed, announced Oct 19, 2026." canonical: "https://harbyn.com/changes/elevenlabs/2026-10-19-api-6" last-updated: 2026-10-25 --- # ElevenLabs API Agent TTS effects schema removes deprecated seed Markdown version of . Breaking change - ElevenLabs API. medium severity. In effect. Create, Get and Update agent TTS effects schemas remove the deprecated seed field. The previous October 12 notice said this field already had no effect. ## Facts | Fact | Value | | --- | --- | | Vendor | [ElevenLabs API](https://harbyn.com/vendors/elevenlabs.md) | | Kind | Breaking change | | Severity | medium | | Status | In effect | | Announced | Oct 19, 2026 | | Added to Harbyn | Oct 25, 2026 | | Lead time | No dated deadline | | Review | Reviewed by a person, extracted by a model | ## Find it in your code ```sh npx harbyn scan ``` This change names no identifier the scanner can match line by line, so the scan tells you whether your repository uses ElevenLabs API, from its packages and API hosts. Nothing leaves your machine. ## Sources Where this event comes from: the page we read, when we read it, and the hash of that snapshot. - (changelog, fetched 2026-10-23 14:15 UTC, sha256 `56186c0038135176391d6c85ed87059069d83fd14e5140a79e4cdc9fffbb2a97`) ## Related changes ### More from ElevenLabs API - [PVC-as-IVC option is nullable](https://harbyn.com/changes/elevenlabs/2026-10-19-api-5.md) (Behavior change, announced Oct 19, 2026) - [Resubmittable voice review status](https://harbyn.com/changes/elevenlabs/2026-10-19-voices.md) (Behavior change, announced Oct 19, 2026) - [TTS effects seed and knowledge base auto\_discover deprecated and ignored](https://harbyn.com/changes/elevenlabs/2026-10-12-api-3.md) (Deprecation, announced Oct 12, 2026) - [Call queueing enabled by default for new agents](https://harbyn.com/changes/elevenlabs/2026-10-12-elevenagents-3.md) (Behavior change, announced Oct 12, 2026) ### Changes at other vendors - [Amazon Selling Partner API: October listing attribute usage and enumeration value updates](https://harbyn.com/changes/amazon-sp-api/2026-10-14-sp-api-updates-new-listings-items-api-ivp-values-in-eu5-jp-and-ca-stores-oct-2.md) (effective Oct 26, 2026) - [Supabase: four CBC-mode TLS 1.2 cipher suites will be removed from project HTTP APIs](https://harbyn.com/changes/supabase/2026-10-12-an-outdated-subset-of-tls-1-2-ciphers-will-be-disabled-on-project-http-apis.md) (effective Nov 10, 2026) - [Google Workspace APIs: OAuth clients must be marked as agentic to call Google Workspace MCP servers](https://harbyn.com/changes/google-workspace/2026-10-12-oauth-clients-must-be-marked-as-agentic-to-call-google-workspace-mcp-servers.md) (effective Nov 11, 2026) - [Bitbucket Cloud API: Git Credential Manager upgrade required for OAuth 2.0 Git authentication](https://harbyn.com/changes/bitbucket/2026-10-13-git-credential-manager-upgrade-required-for-oauth-2-0-git-authentication.md) (effective Nov 30, 2026) [All upcoming deadlines](https://harbyn.com/deadlines.md)