62bb3f9 fix(audio): fallback to /models for custom TTS endpoints breaking on /audio/models
📊 Changes
1 file changed (+54 additions, -8 deletions)
View changed files
📝backend/open_webui/routers/audio.py (+54 -8)
📄 Description
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Note to first-time contributors: Please open a discussion post in Discussions to discuss your idea/fix with the community before creating a pull request, and describe your changes before submitting a pull request.
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Dependencies: Are there any new or upgraded dependencies? If so, explain why, update the changelog/docs, and include any compatibility notes. Actually run the code/function that uses updated library to ensure it doesn't crash.
Testing: Perform manual tests to verify the implemented fix/feature works as intended AND does not break any other functionality. Include reproducible steps to demonstrate the issue before the fix. Test edge cases (URL encoding, HTML entities, types). Take this as an opportunity to make screenshots of the feature/fix and include them in the PR description.
Agentic AI Code: This Pull Request was prepared with the assistance of an AI copilot and has been thoroughly reviewed and manually tested by the author to ensure quality and adherence to project standards.
Code review: Have you performed a self-review of your code, addressing any coding standard issues and ensuring adherence to the project's coding standards?
Design & Architecture: Prefer smart defaults over adding new settings; use local state for ephemeral UI logic. Open a Discussion for major architectural or UX changes.
Git Hygiene: Keep PRs atomic (one logical change). Clean up commits and rebase on dev to ensure no unrelated commits (e.g. from main) are included. Push updates to the existing PR branch instead of closing and reopening.
Title Prefix: To clearly categorize this pull request, prefix the pull request title using one of the following:
BREAKING CHANGE: Significant changes that may affect compatibility
build: Changes that affect the build system or external dependencies
ci: Changes to our continuous integration processes or workflows
chore: Refactor, cleanup, or other non-functional code changes
docs: Documentation update or addition
feat: Introduces a new feature or enhancement to the codebase
fix: Bug fix or error correction
i18n: Internationalization or localization changes
perf: Performance improvement
refactor: Code restructuring for better maintainability, readability, or scalability
style: Changes that do not affect the meaning of the code (white space, formatting, missing semi-colons, etc.)
test: Adding missing tests or correcting existing tests
WIP: Work in progress, a temporary label for incomplete or ongoing work
Changelog Entry
Description
Fixed an issue causing custom audio TTS providers (like KokoroTTS API) to trigger 404s when attempting to fetch models by explicitly providing a fallback route mapping /audio/models directly down to /models upon failure. Furthermore, fortified model formatting dynamically across models arrays regardless of whether dicts or raw strings were yielded dynamically.
Fixed
Fallback HTTP Request handling to /models for endpoint /audio/models compatibility in custom TTS setups like KokoroTTS.
Prevented string-based endpoint response parsing logic explosions by validating dictionaries natively with id keys.
Prevented the adjacent string indices must be integers crash from bleeding into the Admin Panel when simultaneously fetching /audio/voices in tandem.
Safely stripped explicit None or falsy elements structurally from lists to prevent synthesizing bogus {'id': 'None'} items out onto the UI.
Stabilized network-request exception fallback mappings inherently ensuring broken TLS TCP sockets or connection faults don't fatally drop threads natively.
Also prevented the same string indices must be integers crash from bleeding into the Admin Panel when simultaneously fetching /audio/voices in tandem.
Additional Information
Verified navigating to the Admin settings tab gracefully defaults off of /audio/models throwing 404 directly up to recovering with /models under-the-hood.
Verified 100% backward compliance via dynamic payload inference structures for fully standard API structures natively.
Screenshots or Videos
Part 1 of fix
Before:
After:
Part 2 of fix
Before:
After:
Part 3 of fix
Before:
After:
Contributor License Agreement
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## 📋 Pull Request Information
**Original PR:** https://github.com/open-webui/open-webui/pull/23659
**Author:** [@silentoplayz](https://github.com/silentoplayz)
**Created:** 4/13/2026
**Status:** ❌ Closed
**Base:** `dev` ← **Head:** `fix/audio-custom-models-fallback`
---
### 📝 Commits (1)
- [`62bb3f9`](https://github.com/open-webui/open-webui/commit/62bb3f971fff8990ef178130f145c325de240301) fix(audio): fallback to /models for custom TTS endpoints breaking on /audio/models
### 📊 Changes
**1 file changed** (+54 additions, -8 deletions)
<details>
<summary>View changed files</summary>
📝 `backend/open_webui/routers/audio.py` (+54 -8)
</details>
### 📄 Description
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# Pull Request Checklist
### Note to first-time contributors: Please open a discussion post in [Discussions](https://github.com/open-webui/open-webui/discussions) to discuss your idea/fix with the community before creating a pull request, and describe your changes before submitting a pull request.
This is to ensure large feature PRs are discussed with the community first, before starting work on it. If the community does not want this feature or it is not relevant for Open WebUI as a project, it can be identified in the discussion before working on the feature and submitting the PR.
**Before submitting, make sure you've checked the following:**
- [x] **Target branch:** Verify that the pull request targets the `dev` branch. **PRs targeting `main` will be immediately closed.**
- [x] **Description:** Provide a concise description of the changes made in this pull request down below.
- [x] **Changelog:** Ensure a changelog entry following the format of [Keep a Changelog](https://keepachangelog.com/) is added at the bottom of the PR description.
- [x] **Documentation:** Add docs in [Open WebUI Docs Repository](https://github.com/open-webui/docs). Document user-facing behavior, environment variables, public APIs/interfaces, or deployment steps.
- [x] **Dependencies:** Are there any new or upgraded dependencies? If so, explain why, update the changelog/docs, and include any compatibility notes. Actually run the code/function that uses updated library to ensure it doesn't crash.
- [x] **Testing:** Perform manual tests to **verify the implemented fix/feature works as intended AND does not break any other functionality**. Include reproducible steps to demonstrate the issue before the fix. Test edge cases (URL encoding, HTML entities, types). Take this as an opportunity to **make screenshots of the feature/fix and include them in the PR description**.
- [x] **Agentic AI Code:** This Pull Request was prepared with the assistance of an AI copilot and has been thoroughly reviewed and manually tested by the author to ensure quality and adherence to project standards.
- [x] **Code review:** Have you performed a self-review of your code, addressing any coding standard issues and ensuring adherence to the project's coding standards?
- [x] **Design & Architecture:** Prefer smart defaults over adding new settings; use local state for ephemeral UI logic. Open a Discussion for major architectural or UX changes.
- [x] **Git Hygiene:** Keep PRs atomic (one logical change). Clean up commits and rebase on `dev` to ensure no unrelated commits (e.g. from `main`) are included. Push updates to the existing PR branch instead of closing and reopening.
- [x] **Title Prefix:** To clearly categorize this pull request, prefix the pull request title using one of the following:
- **BREAKING CHANGE**: Significant changes that may affect compatibility
- **build**: Changes that affect the build system or external dependencies
- **ci**: Changes to our continuous integration processes or workflows
- **chore**: Refactor, cleanup, or other non-functional code changes
- **docs**: Documentation update or addition
- **feat**: Introduces a new feature or enhancement to the codebase
- **fix**: Bug fix or error correction
- **i18n**: Internationalization or localization changes
- **perf**: Performance improvement
- **refactor**: Code restructuring for better maintainability, readability, or scalability
- **style**: Changes that do not affect the meaning of the code (white space, formatting, missing semi-colons, etc.)
- **test**: Adding missing tests or correcting existing tests
- **WIP**: Work in progress, a temporary label for incomplete or ongoing work
# Changelog Entry
### Description
- Fixed an issue causing custom audio TTS providers (like KokoroTTS API) to trigger 404s when attempting to fetch models by explicitly providing a fallback route mapping `/audio/models` directly down to `/models` upon failure. Furthermore, fortified model formatting dynamically across models arrays regardless of whether dicts or raw strings were yielded dynamically.
### Fixed
- Fallback HTTP Request handling to `/models` for endpoint `/audio/models` compatibility in custom TTS setups like KokoroTTS.
- Prevented string-based endpoint response parsing logic explosions by validating dictionaries natively with `id` keys.
- Prevented the adjacent `string indices must be integers` crash from bleeding into the Admin Panel when simultaneously fetching `/audio/voices` in tandem.
- Safely stripped explicit `None` or falsy elements structurally from lists to prevent synthesizing bogus `{'id': 'None'}` items out onto the UI.
- Stabilized network-request exception fallback mappings inherently ensuring broken TLS TCP sockets or connection faults don't fatally drop threads natively.
- Also prevented the same `string indices must be integers` crash from bleeding into the Admin Panel when simultaneously fetching `/audio/voices` in tandem.
---
### Additional Information
- Verified navigating to the Admin settings tab gracefully defaults off of `/audio/models` throwing 404 directly up to recovering with `/models` under-the-hood.
- Verified 100% backward compliance via dynamic payload inference structures for fully standard API structures natively.
### Screenshots or Videos
## Part 1 of fix
**Before:**
<img width="1217" height="122" alt="image" src="https://github.com/user-attachments/assets/369c9ef6-f041-4bdf-87c9-2302725befd3" />
**After:**
<img width="1221" height="89" alt="image" src="https://github.com/user-attachments/assets/a4858115-2989-43d4-bb02-16666f615535" />
### Part 2 of fix
**Before:**
<img width="594" height="410" alt="image" src="https://github.com/user-attachments/assets/081bfbba-de8b-4769-949d-06c8f5ff5d43" />
**After:**
<img width="594" height="410" alt="image" src="https://github.com/user-attachments/assets/cdbcc708-0dc7-4f2e-96d4-50e995a6db21" />
### Part 3 of fix
**Before:**
<img width="893" height="1272" alt="image" src="https://github.com/user-attachments/assets/1bfeee08-e690-4aff-874a-46f3fb1e4da5" />
**After:**
<img width="893" height="1272" alt="image" src="https://github.com/user-attachments/assets/df9e5d5b-f4f1-4447-9451-4f5d9eef7e63" />
### Contributor License Agreement
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- [x] By submitting this pull request, I confirm that I have read and fully agree to the [Contributor License Agreement (CLA)](https://github.com/open-webui/open-webui/blob/main/CONTRIBUTOR_LICENSE_AGREEMENT), and I am providing my contributions under its terms.
> [!NOTE]
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<sub>🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.</sub>
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📋 Pull Request Information
Original PR: https://github.com/open-webui/open-webui/pull/23659
Author: @silentoplayz
Created: 4/13/2026
Status: ❌ Closed
Base:
dev← Head:fix/audio-custom-models-fallback📝 Commits (1)
62bb3f9fix(audio): fallback to /models for custom TTS endpoints breaking on /audio/models📊 Changes
1 file changed (+54 additions, -8 deletions)
View changed files
📝
backend/open_webui/routers/audio.py(+54 -8)📄 Description
Pull Request Checklist
Note to first-time contributors: Please open a discussion post in Discussions to discuss your idea/fix with the community before creating a pull request, and describe your changes before submitting a pull request.
This is to ensure large feature PRs are discussed with the community first, before starting work on it. If the community does not want this feature or it is not relevant for Open WebUI as a project, it can be identified in the discussion before working on the feature and submitting the PR.
Before submitting, make sure you've checked the following:
devbranch. PRs targetingmainwill be immediately closed.devto ensure no unrelated commits (e.g. frommain) are included. Push updates to the existing PR branch instead of closing and reopening.Changelog Entry
Description
/audio/modelsdirectly down to/modelsupon failure. Furthermore, fortified model formatting dynamically across models arrays regardless of whether dicts or raw strings were yielded dynamically.Fixed
/modelsfor endpoint/audio/modelscompatibility in custom TTS setups like KokoroTTS.idkeys.string indices must be integerscrash from bleeding into the Admin Panel when simultaneously fetching/audio/voicesin tandem.Noneor falsy elements structurally from lists to prevent synthesizing bogus{'id': 'None'}items out onto the UI.string indices must be integerscrash from bleeding into the Admin Panel when simultaneously fetching/audio/voicesin tandem.Additional Information
/audio/modelsthrowing 404 directly up to recovering with/modelsunder-the-hood.Screenshots or Videos
Part 1 of fix
Before:
After:
Part 2 of fix
Before:
After:
Part 3 of fix
Before:
After:
Contributor License Agreement
🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.