Middleware integrations

Browse available middleware for different providers or contribute your own to the ecosystem. Learn more about how middleware works in the middleware overview and how to use middleware with Deep Agents in the Deep Agents docs. Middleware enables context engineering, harness customization, and runtime safety controls. It is a useful extension point in LangChain and we love highlighting what the community builds with it:

Add an official integration

Follow the contributing guide to build and publish a middleware package.

Share a community middleware

Open a PR to the docs repo to add your middleware to the all integrations table.

Featured integrations

Provider	Middleware available	Source
`OpenAI middleware`	Content moderation	`langchain-ai/langchain`
`Anthropic middleware`	Prompt caching, bash tool, text editor, memory, and file search	`langchain-ai/langchain`
`AWS middleware`	Prompt caching and AgentCore Payments	`langchain-ai/langchain-aws`, `aws/bedrock-agentcore-sdk-python`
`Microsoft Foundry middleware`	Text moderation, image moderation, prompt shield, protected material, and groundedness	`langchain-ai/langchain-azure`

All middleware

Provider	Middleware available	Source	Downloads
`OpenAI middleware`	Content moderation	`langchain-ai/langchain`
`Anthropic middleware`	Prompt caching, bash tool, text editor, memory, and file search	`langchain-ai/langchain`
`AWS middleware`	Prompt caching and AgentCore Payments	`langchain-ai/langchain-aws`, `aws/bedrock-agentcore-sdk-python`
`Microsoft Foundry middleware`	Text moderation, image moderation, prompt shield, protected material, and groundedness	`langchain-ai/langchain-azure`
`CopilotKit`	CopilotKit middleware and FastAPI bridge for Deep Agents, create_agent graphs, AG-UI, and the React and runtime clients	`CopilotKit/CopilotKit`
`compact-middleware`	Claude Code’s compaction engine as LangChain middleware. Multi-level context compaction for long-running agents.	`emanueleielo/compact-middleware`
`Cisco AI Defense`	Runtime security inspection	`cisco-ai-defense/ai-defense-langchain-middleware`
`langchain-collapse`	Preventive context management. Collapses consecutive tool-call groups before they fill the context window.	`johanity/langchain-collapse`
`langchain-task-steering`	Implicit state-machine middleware for ordered task pipelines with per-task tool scoping, dynamic prompt injection, and composable completion validation.	`edvinhallvaxhiu/langchain-task-steering`
`advisor-middleware`	Claude Code’s advisor pattern as LangChain middleware. Pairs a fast executor model with a powerful advisor model that intervenes only on critical decisions.	`emanueleielo/advisor-middleware`
`langchain-router`	Phase-based model routing. Routes execution turns to a fast model, keeps the primary for planning and recovery.	`johanity/langchain-router`
`text2sql-framework`	Replaces RAG with recursive tool use — the agent explores, writes, tests, and self-corrects using one execute_sql tool.	`Text2SqlAgent/text2sql-framework`
`NoPII`	Runtime PII tokenization. Detects personal data in outbound prompts, replaces it with deterministic vault tokens before the request reaches the LLM, and restores the original values in the response.	`Enigma-Vault/NoPII`
`OWASP Agent Memory Guard`	Runtime defense against AI agent memory poisoning (OWASP ASI06). Scans messages, model responses, and tool outputs locally with block, warn, and strip modes.	`OWASP/www-project-agent-memory-guard`
`DNS-AID`	DNS-based agent discovery via the DNS-AID protocol. Auto-publishes agents on startup, auto-unpublishes on shutdown, and provides discovery tools.	`IngmarVG-IB/langchain-dns-aid`
`eager-tools`	Reduces agent wall-clock latency by dispatching each tool call the moment its streaming block closes, overlapping tool execution with LLM generation.	`cloudthinker-ai/eager-tools`	N/A
`langgraph-state-machine`	Section-based flow control for LangGraph React agents. Divides conversations into discrete phases with scoped tools, prompts, auto-transitions, branching, and optional per-section LLM override.	`mahmoud661/langgraph-state-machine`	N/A