--- title: "ElevenLabs API Flows webhook targets now require an explicit type: 2026-09-28 | Harbyn" description: "ElevenLabs API Flows webhook targets now require an explicit type, announced Sep 28, 2026." canonical: "https://harbyn.com/changes/elevenlabs/2026-09-28-api" last-updated: 2026-10-02 --- # ElevenLabs API Flows webhook targets now require an explicit type Markdown version of . Breaking change - ElevenLabs API. medium severity. In effect. Webhook targets on Flows image generation, video generation and template run requests now require an explicit type discriminator (all or ids). The previous defaults were removed, so requests that relied on them must set type. ## Facts | Fact | Value | | --- | --- | | Vendor | [ElevenLabs API](https://harbyn.com/vendors/elevenlabs.md) | | Kind | Breaking change | | Severity | medium | | Status | In effect | | Announced | Sep 28, 2026 | | Added to Harbyn | Oct 2, 2026 | | Lead time | No dated deadline | | Endpoints | `POST /v1/flows/image`, `POST /v1/flows/templates/{template_id}/runs` | | Review | Reviewed by a person, extracted by a deterministic parser | ## Find it in your code ```sh npx harbyn scan ``` The scanner reads your repository on your machine and reports every file and line that uses the identifiers above. 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 2026-10-02 22:20 UTC, sha256 `43059b8c565217296a65aec4778d9144268c3e8a8f519bf3cab220b206846b58`) ## Related changes ### More from ElevenLabs API - [CLI v1.4.0 stops sending stored OAuth credentials with an explicit API key](https://harbyn.com/changes/elevenlabs/2026-09-28-sdk-releases-2.md) (Behavior change, announced Sep 28, 2026) - [Sora 2 and Sora 2 Pro retired](https://harbyn.com/changes/elevenlabs/2026-09-23-image-video.md) (Retirement, effective Sep 24, 2026) - [Seedance 1.5 Pro retirement](https://harbyn.com/changes/elevenlabs/2026-09-23-image-video-2.md) (Retirement, effective Nov 11, 2026) - [Conversation filters no longer accept the missing operator](https://harbyn.com/changes/elevenlabs/2026-09-21-api-12.md) (Breaking change, announced Sep 21, 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)