Enhanced ChatGPT Clone: Features Agents, MCP, DeepSeek, Anthropic, AWS, OpenAI, Responses API, Azure, Groq, o1, GPT-5, Mistral, OpenRouter, Vertex AI, Gemini, Artifacts, AI model switching, message search, Code Interpreter, langchain, DALL-E-3, OpenAPI Actions, Functions, Secure Multi-User Auth, Presets, open-source for self-hosting. Active. https://librechat.ai/
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Danny Avila 1754297038
🛞 fix: Re-Exchange Rejected OBO Tokens (#15577)
* 🔑 fix: Re-Exchange Rejected OBO Tokens on MCP Auth Failure

An OBO MCP connection registered the non-OAuth fallback handler, so a 401/403
from the downstream server became `oauthFailed` without ever running another
token exchange. Every reconnect attempt replayed the credential the server had
just rejected.

Unlike interactive OAuth, an OBO bearer is minted from the user's live upstream
session, so a rejection is recoverable with no user-facing step — but only while
that session is reachable. `handleOboEvents` re-runs the exchange for a
connection whose creating request is still in flight, and retires the connection
otherwise, since `upstreamTokenProvider` closes over a finished request past that
point and the next borrower rebuilds against a live provider.

Three parts:

- `handleOboEvents` replaces the fallback for OBO connections: it re-exchanges
  once per attempt, updates the transport bearer, and emits `oauthHandled` so the
  connect retry proceeds.
- The refreshed token also replaces the runtime `authorization` header. Runtime
  headers outrank the transport's in `buildFetchInit`, so without this the stale
  bearer a previous tool call installed would keep winning on the retry.
- `resolveOboToken` gains `forceRefresh`, which bypasses the OBO token cache. A
  revoked or scope-invalidated token is still inside its cached lifetime, so a
  cached read would hand back the same rejected bearer.

A connection that cannot refresh now stops reconnecting rather than replaying the
rejected bearer through every backoff step and spending the circuit breaker's
cycle budget.

* 🔁 fix: Re-Exchange Rejected OBO Tokens on Tool Calls Too

Addresses both codex findings on c77be03.

A tool-call 401 never reached the connection-level handler: `oauthRequired` is
emitted only by `connectClient`, and `callTool`'s own recovery attaches solely
when `isOAuthServer(currentOptions) || connection.usesOAuth()` — both false for
an OBO-only config. It rethrew untouched, and the resolver kept serving the
rejected bearer from cache on every later call until it expired. This is the
dominant path for OBO traffic, so the cache-invalidation half of the previous
commit was not actually reachable in practice.

The per-call token resolution moves into `applyOboAuthorization(forceRefresh)`,
which the auth-error path re-runs with the cache bypassed before retrying once.
Recovery belongs here rather than at the connection level: the request is still
live, so `upstreamTokenProvider` can mint a replacement.

Also propagate the re-exchange failure. `connectClient` rejects its handling
promise with the mapped error and then rethrows the server's original 401, so a
diagnosis like an unrefreshable sign-in session was lost. `createConnection` now
surfaces it in place of the 401 — the same substitution the initial OBO
resolution already makes — and only for a genuine exchange failure, not for the
control-flow deferrals.

* 🔗 fix: Persist the Re-Exchanged OBO Token on the Connection

Addresses the round-2 codex finding on 09ccb34.

The tool-call recovery updated only the runtime request headers, leaving
`connection.oauthTokens` holding the rejected credential. That is not merely
untidy: a legacy SSE connection's event stream is served by
`eventSourceInit.fetch`, which bypasses `createFetchFunction` entirely and never
consults `getRequestHeaders()`. It sends the headers `constructTransport`
captured from `oauthTokens`, so the next transport rebuild re-baked the dead
bearer, 401'd, and — through the cached-connection handler added earlier in this
PR — retired a connection that had already recovered.

`applyOboAuthorization` now stores the resolved token via `setOAuthTokens`, the
same thing the connection-level refresh path does. Storing it on every
resolution rather than only on the retry also ends the pre-existing drift where
a connection's baked bearer aged out while tool calls used newer ones.
2026-09-04 00:06:44 -04:00
.claude/skills 🪝 feat: Execute Agent Plugin Command Hooks (#14755) 2026-08-12 13:21:15 -04:00
.devcontainer 🐳 chore: Upgrade Docker Builds To Node 24 (#13448) 2026-06-01 10:03:18 -04:00
.github ✨ v0.8.8-rc2 (#14845) 2026-09-02 22:18:48 -04:00
.husky 🪥 chore: Run CI's Static Checks on Each Commit's Diff (#15303) 2026-08-28 10:08:37 -04:00
.vscode
api 🗜️ fix: Bound Conversation Page Size (#15576) 2026-09-03 23:52:36 -04:00
client 🧶 fix: Render Solo Agent Groups as Sequential Content (#15574) 2026-09-03 23:46:25 -04:00
config 🛞 feat: Manage Personal Code Environment Lifecycles (#15369) 2026-09-01 21:10:05 -04:00
e2e 🧽 test: Restore the Admin Allowlist Override This Spec Leaks Into the Shard (#15543) 2026-09-03 12:42:10 -04:00
helm ✨ v0.8.8-rc2 (#14845) 2026-09-02 22:18:48 -04:00
otel/langfuse-fanout 🗿 chore: Upgrade gRPC to Prevent Receive Buffer Exhaustion (#15493) 2026-09-01 21:32:20 -04:00
packages 🛞 fix: Re-Exchange Rejected OBO Tokens (#15577) 2026-09-04 00:06:44 -04:00
redis-config
scripts 🪥 chore: Run CI's Static Checks on Each Commit's Diff (#15303) 2026-08-28 10:08:37 -04:00
search 🐋 chore: add opt-in alternative local stack experiments (#14678) 2026-08-07 10:40:58 -04:00
skill 🗂️ feat: Add Deployment Skill Directory (#13523) 2026-06-05 10:24:28 -04:00
src/tests
utils 🐳 chore: Update image registry references in Docker/Helm configurations (#12026) 2026-03-02 22:14:50 -05:00
.codex 🧴 fix: Strip LangChain URLs From Provider Errors (#15421) 2026-08-31 12:51:34 -04:00
.dockerignore
.env.example 🪵 feat: Add OpenTelemetry Logs Pipeline via Winston Bridge (#15565) 2026-09-03 21:16:09 -04:00
.gitattributes 🎛️ feat: DB-Backed Per-Principal Config System (#12354) 2026-03-25 19:39:29 -04:00
.gitignore 🧪 test(e2e): add Bombadil property exploration (#14462) 2026-08-10 02:11:06 +02:00
.nvmrc 🐳 chore: Upgrade Docker Builds To Node 24 (#13448) 2026-06-01 10:03:18 -04:00
.prettierrc
AGENTS.md 🔌 refactor: Give the Subagent Surface a Host Seam and Its Own Jotai State (#15455) 2026-09-01 11:15:42 -04:00
bun.lock ✨ v0.8.8-rc2 (#14845) 2026-09-02 22:18:48 -04:00
CLAUDE.md 🔌 refactor: Give the Subagent Surface a Host Seam and Its Own Jotai State (#15455) 2026-09-01 11:15:42 -04:00
CONTEXT.md 🛄 fix: Reclaim Pending MCP OAuth Prompts on Resume (#15471) 2026-09-01 16:52:18 -04:00
deploy-compose.langfuse-fanout.yml 🪭 feat: support per-run central langfuse export suppression (#14207) 2026-07-12 08:03:27 -04:00
deploy-compose.yml 🫆 chore: Remove Published Credential Defaults (#14680) 2026-08-07 07:25:05 -04:00
docker-compose.langfuse-fanout.yml 🪭 feat: support per-run central langfuse export suppression (#14207) 2026-07-12 08:03:27 -04:00
docker-compose.override.yml.example 🐳 chore: Update image registry references in Docker/Helm configurations (#12026) 2026-03-02 22:14:50 -05:00
docker-compose.yml 🫆 chore: Remove Published Credential Defaults (#14680) 2026-08-07 07:25:05 -04:00
Dockerfile ✨ v0.8.8-rc2 (#14845) 2026-09-02 22:18:48 -04:00
Dockerfile.multi ✨ v0.8.8-rc2 (#14845) 2026-09-02 22:18:48 -04:00
eslint.config.mjs 🎨 feat: Refine Client Colors and Sharing Dialogs (#14734) 2026-08-10 22:43:57 -04:00
librechat.example.yaml 🔐 feat: Add M2M Authentication for Agent Management (#15555) 2026-09-03 20:07:00 -04:00
LICENSE 🗒️ docs: Update LICENSE.md Year: 2025 -> 2026 (#12554) 2026-04-08 09:12:44 -04:00
package-lock.json ✨ feat: add morphing state icons across the client (#14697) 2026-09-04 03:27:14 +02:00
package.json ✨ v0.8.8-rc2 (#14845) 2026-09-02 22:18:48 -04:00
rag.yml 🐳 chore: Update image registry references in Docker/Helm configurations (#12026) 2026-03-02 22:14:50 -05:00
README.md ✨ v0.8.8-rc2 (#14845) 2026-09-02 22:18:48 -04:00
README.zh.md ✨ v0.8.7-rc1 (#13592) 2026-06-15 13:10:30 -04:00
tool-intent-spec.md 🎯 feat: Tool Intent Label Capability (tool_intents) (#14499) 2026-07-29 15:40:52 -04:00
turbo.json 🌯 chore: Retire Rollup-Era devDependencies After tsdown Migration (#14496) 2026-07-28 22:08:52 -04:00

LibreChat

English · 中文

Deploy on Railway Deploy on Zeabur Deploy on Sealos

Translation Progress

🚀 What's New in v0.8.8-rc2

  • Agent run control: Interrupt an Agent before visible answer text, steer runs with files and quoted excerpts, durably queue follow-ups, and recover saved partial work with Keep going or Answer now.
  • Agent activity: Optional generated labels group reasoning and tool work, fold completed groups into live phase cards, keep generated files visible, summarize multi-step phases, and show the current reasoning direction.
  • Human-in-the-loop Agents: Stream up to four related questions, pause for input or tool approval, and resume durably.
  • Unified Agent Builder: Configure Skills, MCP, Code Interpreter, orchestration, Programmatic Tool Calling, model-spec controls, and per-tool background and intent settings in one Tools marketplace; Skills can be enabled for standalone runtime authoring without exposing the existing catalog.
  • Durable Agent automation: Authenticated Agent Events support bound child actors, expected-action receipts, per-actor mailboxes, event batching, durable human pauses, and automatic detached Actions across built-in stream stores.
  • Deeper Subagent history: Browse branch-aware child turns with bounded reasoning and stable live event views, load earlier activity, inspect event details, continue completed child chats, and automatically wake saved parent Agents when detached work settles.
  • Background tools: Eligible Code Interpreter, MCP, Plugin, and Action tools can run while an Agent keeps working, with automatic delivery for supported completions and polling controls when needed.
  • Code Interpreter workflows: Sandbox images return as viewable artifacts; highly experimental stateful sessions add scoped managed, attached, or personal environments, per-message file downloads, and guarded file-write and command permissions.
  • Agent extensibility: Experimental Agent Plugins bundle deployment Skills, MCP servers, and opt-in command hooks; saved Agent teams run as isolated Subagent graphs.
  • Scheduled Chats (experimental): Run saved Agents with presets or custom cron, selectable time zones, multi-day weekly cadence, and optional Chat Project destinations.
  • Memory and context: Agents can use optionally isolated memory, preserve adaptive context fading across turns, and show categorized current-window usage, tokens, and optional cost.
  • Editable long pastes: Long pasted text becomes an editable attachment that can be moved back into the composer; attachment-only turns and reliable Upload as Text downloads are also supported.
  • Projects, settings, and navigation: Search conversation titles and message contents, manage project chats, use searchable settings and shortcuts, pin chats, choose clock/week conventions, and navigate faster on mobile.
  • Sharing and artifacts: Stable shared links support personal copies; fullscreen previews, Mermaid export, PowerPoint templates, shell scripts, and original Office downloads expand file workflows.
  • Web search: Keenable adds keyless search and page fetch, while SearXNG and Tavily gain richer controls and all web-tool egress uses stronger SSRF protection.
  • Security and authentication: Default HTTP security headers, opt-in nonce CSP, authenticated local images, per-user Code Interpreter JWTs, stable SAML identity binding, live-session OpenID token refresh, and retired JWT-secret rejection harden deployments.
  • Models and reasoning: Added GPT-5.6 with Responses reasoning controls, Claude Fable 5.1, Opus 5, and Sonnet 5, plus Gemini 3.8/3.7/3.6 Flash and Gemini 3.5 Flash-Lite.
  • Langfuse observability: Configure encrypted in-app connections, tenant fanout, authenticated gateways, export-decision telemetry, and authorized session links in chats and shared views.
  • Administration: Source-aware content filters can audit or block model-bound data, while tenant Insights, delegated configuration, encrypted secrets, and expiring violation scores improve operations.
  • Streaming and reliability: Adaptive smoothing, Redis delta batching and failover recovery, automatic generation protocol v2, live MCP catalog refresh, Agent circuit breakers, and DocumentDB support improve long runs and scaled deployments.

Read the full v0.8.8-rc2 changelog.

✨ Features

  • 🖥️ UI & Experience inspired by ChatGPT with enhanced design and features

  • 🤖 AI Model Selection:

    • Anthropic (Claude), AWS Bedrock, OpenAI, Azure OpenAI, Google, Vertex AI, OpenAI Responses API (incl. Azure)
    • Custom Endpoints: Use any OpenAI-compatible API with LibreChat, no proxy required
    • Compatible with Local & Remote AI Providers:
      • Ollama, groq, Cohere, Mistral AI, Apple MLX, koboldcpp, together.ai,
      • OpenRouter, Helicone, Perplexity, ShuttleAI, Deepseek, Qwen, and more
  • 🔧 Code Interpreter API:

    • Secure, Sandboxed Execution in Python, Node.js (JS/TS), Go, C/C++, Java, PHP, Rust, and Fortran
    • Seamless File Handling: Upload, process, and download files directly
    • No Privacy Concerns: Fully isolated and secure execution
    • Open-Source & Self-Hostable: powered by ClickHouse/code-interpreter
  • 🔦 Agents & Tools Integration:

    • LibreChat Agents:
      • No-Code Custom Assistants: Build specialized, AI-driven helpers
      • Agent Marketplace: Discover and deploy community-built agents
      • Collaborative Sharing: Share agents with specific users and groups
      • Flexible & Extensible: Use MCP Servers, tools, file search, code execution, and more
      • Skills: Create reusable SKILL.md instruction bundles for manual, automatic, or always-on agent workflows
      • Agent Plugins: Experimentally bundle deployment Skills and MCP servers into startup-loaded packages
      • Subagents: Delegate focused work to isolated child agent runs with their own context windows
      • Compatible with Custom Endpoints, OpenAI, Azure, Anthropic, AWS Bedrock, Google, Vertex AI, Responses API, and more
      • Model Context Protocol (MCP) Support for Tools
  • 🔍 Web Search:

    • Search the internet and retrieve relevant information to enhance your AI context
    • Combines search providers, content scrapers, and result rerankers for optimal results
    • Customizable Jina Reranking: Configure custom Jina API URLs for reranking services
    • Learn More →
  • 🪄 Generative UI with Code Artifacts:

    • Code Artifacts create React, HTML, and Mermaid content directly in chat
    • Open previews fullscreen and export Mermaid diagrams as SVG or PNG
  • 🎨 Image Generation & Editing

  • 💾 Presets & Context Management:

    • Create, Save, & Share Custom Presets
    • Switch between AI Endpoints and Presets mid-chat
    • Edit, Resubmit, and Continue Messages with Conversation branching
    • Create and share prompts with specific users and groups
    • Fork Messages & Conversations for Advanced Context control
  • 💬 Multimodal & File Interactions:

    • Upload and analyze images with Claude 3, GPT-4.5, GPT-4o, o1, Llama-Vision, and Gemini 📸
    • Chat with Files using Custom Endpoints, OpenAI, Azure, Anthropic, AWS Bedrock, & Google 🗃️
  • 🌎 Multilingual UI:

    • English, 中文 (简体), 中文 (繁體), العربية, Deutsch, Español, Français, Italiano
    • Polski, Português (PT), Português (BR), Русский, 日本語, Svenska, 한국어, Tiếng Việt
    • Türkçe, Nederlands, עברית, Català, Čeština, Dansk, Eesti, فارسی
    • Suomi, Magyar, Հայերեն, Bahasa Indonesia, ქართული, Latviešu, ไทย, ئۇيغۇرچە
  • 🧠 Reasoning UI:

    • Dynamic Reasoning UI for Chain-of-Thought/Reasoning AI models like DeepSeek-R1
  • 🎨 Customizable Interface:

    • Customizable Dropdown & Interface that adapts to both power users and newcomers
  • 🌊 Resumable Streams:

    • Never lose a response: AI responses automatically reconnect and resume if your connection drops
    • Multi-Tab & Multi-Device Sync: Open the same chat in multiple tabs or pick up on another device
    • Production-Ready: Works from single-server setups to horizontally scaled deployments with Redis
  • 🗣️ Speech & Audio:

    • Chat hands-free with Speech-to-Text and Text-to-Speech
    • Automatically send and play Audio
    • Supports OpenAI, Azure OpenAI, and Elevenlabs
  • 📥 Import & Export Conversations:

    • Import Conversations from LibreChat, ChatGPT, Chatbot UI
    • Export conversations as screenshots, markdown, text, json
  • 🔍 Search & Discovery:

    • Search all messages/conversations
  • 👥 Multi-User & Secure Access:

    • Multi-User, Secure Authentication with OAuth2, LDAP, & Email Login Support
    • Built-in Moderation, and Token spend tools
  • 🎛️ Admin Panel:

    • Browser-based UI to manage users, groups, roles, and configuration overrides
    • Edit settings and per-role/group permissions live, without redeploying
    • Bundled with the Docker Compose stacks for one-command setup
  • ⚙️ Configuration & Deployment:

    • Configure Proxy, Reverse Proxy, Docker, & many Deployment options
    • Use S3 with CloudFront for stable media links, edge delivery, signed cookies, and secured downloads
    • Use completely local or deploy on the cloud
  • 📖 Open-Source & Community:

    • Completely Open-Source & Built in Public
    • Community-driven development, support, and feedback

For a thorough review of our features, see our docs here 📚

🪶 All-In-One AI Conversations with LibreChat

LibreChat is a self-hosted AI chat platform that unifies all major AI providers in a single, privacy-focused interface.

Beyond chat, LibreChat provides AI Agents, Model Context Protocol (MCP) support, Artifacts, Code Interpreter, custom actions, conversation search, and enterprise-ready multi-user authentication.

Open source, actively developed, and built for anyone who values control over their AI infrastructure.


🌐 Resources

GitHub Repo:

Other:


📝 Changelog

Keep up with the latest updates by visiting the releases page and notes:

⚠️ Please consult the changelog for breaking changes before updating.


⭐ Star History

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danny-avila%2FLibreChat | Trendshift ROSS Index - Fastest Growing Open-Source Startups in Q1 2024 | Runa Capital


✨ Contributions

Contributions, suggestions, bug reports and fixes are welcome!

For new features, components, or extensions, please open an issue and discuss before sending a PR.

If you'd like to help translate LibreChat into your language, we'd love your contribution! Improving our translations not only makes LibreChat more accessible to users around the world but also enhances the overall user experience. Please check out our Translation Guide.


💖 This project exists in its current state thanks to all the people who contribute


🎉 Special Thanks

We thank Locize for their translation management tools that support multiple languages in LibreChat.

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