> ## Documentation Index > Fetch the complete documentation index at: https://langchain-5e9cc07a-preview-docsde-1785859450-e55f5fa.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # Middleware integrations > Integrate with middleware using LangChain Python. Browse available middleware for different providers or contribute your own to the ecosystem. Learn more about how middleware works in the [middleware overview](/oss/python/langchain/middleware/overview) and how to use middleware with Deep Agents in the [Deep Agents docs](/oss/python/deepagents/customization#middleware). ## Share your middleware 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: Follow the contributing guide to build and publish a middleware package. Open a PR to the docs repo to add your middleware to the all integrations table. ## Featured integrations
| Provider | Middleware available | Source | Downloads | | :----------------------------------------------------------------------------- | :------------------------------------------------------------------------------------- | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | [`OpenAI middleware`](/oss/python/integrations/middleware/openai) | Content moderation | [`langchain-ai/langchain`](https://github.com/langchain-ai/langchain/tree/master/libs/partners/openai) | Downloads per month | | [`Anthropic middleware`](/oss/python/integrations/middleware/anthropic) | Prompt caching, bash tool, text editor, memory, and file search | [`langchain-ai/langchain`](https://github.com/langchain-ai/langchain/tree/master/libs/partners/anthropic) | Downloads per month | | [`AWS middleware`](/oss/python/integrations/middleware/aws) | Prompt caching and AgentCore Payments | [`langchain-ai/langchain-aws`](https://github.com/langchain-ai/langchain-aws/tree/main/libs/aws), [`aws/bedrock-agentcore-sdk-python`](https://github.com/aws/bedrock-agentcore-sdk-python) | Downloads per month | | [`Microsoft Foundry middleware`](/oss/python/integrations/middleware/azure_ai) | Text moderation, image moderation, prompt shield, protected material, and groundedness | [`langchain-ai/langchain-azure`](https://github.com/langchain-ai/langchain-azure/tree/main/libs/azure-ai) | Downloads per month |
## All middleware
| Provider | Middleware available | Source | Downloads | | :---------------------------------------------------------------------------------------------------------- | :--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [`OpenAI middleware`](/oss/python/integrations/middleware/openai) | Content moderation | [`langchain-ai/langchain`](https://github.com/langchain-ai/langchain/tree/master/libs/partners/openai) | Downloads per month | | [`Anthropic middleware`](/oss/python/integrations/middleware/anthropic) | Prompt caching, bash tool, text editor, memory, and file search | [`langchain-ai/langchain`](https://github.com/langchain-ai/langchain/tree/master/libs/partners/anthropic) | Downloads per month | | [`AWS middleware`](/oss/python/integrations/middleware/aws) | Prompt caching and AgentCore Payments | [`langchain-ai/langchain-aws`](https://github.com/langchain-ai/langchain-aws/tree/main/libs/aws), [`aws/bedrock-agentcore-sdk-python`](https://github.com/aws/bedrock-agentcore-sdk-python) | Downloads per month | | [`Microsoft Foundry middleware`](/oss/python/integrations/middleware/azure_ai) | Text moderation, image moderation, prompt shield, protected material, and groundedness | [`langchain-ai/langchain-azure`](https://github.com/langchain-ai/langchain-azure/tree/main/libs/azure-ai) | Downloads per month | | [`CopilotKit`](/oss/python/langchain/frontend/integrations/copilotkit) | CopilotKit middleware and FastAPI bridge for Deep Agents, create\_agent graphs, AG-UI, and the React and runtime clients | [`CopilotKit/CopilotKit`](https://github.com/CopilotKit/CopilotKit) | Downloads per month | | [`compact-middleware`](https://github.com/emanueleielo/compact-middleware) | Claude Code's compaction engine as LangChain middleware. Multi-level context compaction for long-running agents. | [`emanueleielo/compact-middleware`](https://github.com/emanueleielo/compact-middleware) | Downloads per month | | [`prompt-shield`](https://github.com/mthamil107/prompt-shield) | Runtime prompt-injection firewall. Scans inputs, tool results, and outputs across detectors and output scanners with block, flag, and log modes. | [`mthamil107/prompt-shield`](https://github.com/mthamil107/prompt-shield) | Downloads per month | | [`Highflame`](https://github.com/highflame-ai/highflame-sdk) | Runtime AI security guardrails — prompt injection, PII/DLP, content safety — applied as middleware via Highflame Shield (OWASP LLM Top 10). | [`highflame-ai/highflame-sdk`](https://github.com/highflame-ai/highflame-sdk) | Downloads per month | | [`Cisco AI Defense`](https://github.com/cisco-ai-defense/ai-defense-langchain-middleware) | Runtime security inspection | [`cisco-ai-defense/ai-defense-langchain-middleware`](https://github.com/cisco-ai-defense/ai-defense-langchain-middleware) | Downloads per month | | [`langchain-collapse`](https://github.com/johanity/langchain-collapse) | Preventive context management. Collapses consecutive tool-call groups before they fill the context window. | [`johanity/langchain-collapse`](https://github.com/johanity/langchain-collapse) | Downloads per month | | [`OpenBox`](https://docs.openbox.ai/getting-started/langgraph) | Real-time governance for LangGraph and Deep Agents. Policies, guardrails, HITL, OTel hook governance, and behavior rules. | [`OpenBox-AI/openbox-langgraph-sdk-python`](https://github.com/OpenBox-AI/openbox-langgraph-sdk-python) | Downloads per month | | [`langchain-task-steering`](https://github.com/edvinhallvaxhiu/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`](https://github.com/edvinhallvaxhiu/langchain-task-steering) | Downloads per month | | [`advisor-middleware`](https://github.com/emanueleielo/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`](https://github.com/emanueleielo/advisor-middleware) | Downloads per month | | [`RelayShield`](https://relayshield.net) | Mandatory pre-execution gate that blocks connect\_mcp\_server and install\_mcp\_package tool calls when RelayShield reports risk. | [`nzdsf2-gif/langchain-relayshield`](https://github.com/nzdsf2-gif/langchain-relayshield) | Downloads per month | | [`langchain-router`](https://github.com/johanity/langchain-router) | Phase-based model routing. Routes execution turns to a fast model, keeps the primary for planning and recovery. | [`johanity/langchain-router`](https://github.com/johanity/langchain-router) | Downloads per month | | [`comply54`](https://comply54.io/langchain) | Runtime compliance enforcement for AI agents under African data protection and financial-sector regulations (deny, escalate, audit, or allow). | [`comply54/langchain-comply54`](https://github.com/comply54/langchain-comply54) | Downloads per month | | [`text2sql-framework`](https://github.com/Text2SqlAgent/text2sql-framework) | Replaces RAG with recursive tool use — the agent explores, writes, tests, and self-corrects using one execute\_sql tool. | [`Text2SqlAgent/text2sql-framework`](https://github.com/Text2SqlAgent/text2sql-framework) | Downloads per month | | [`langchain-distil`](https://github.com/dshakes/distil) | Reversible, certified context compression. Digests large tool outputs and message history before the model call (tool and function messages reversibly, human and system losslessly, the model messages never rewritten), with byte-exact recovery of every digest. Decision-equivalence between compressed and full context is certified offline by a statistical non-inferiority gate. | [`dshakes/distil`](https://github.com/dshakes/distil) | Downloads per month | | [`Tessera`](https://github.com/kenithphilip/Tessera) | Signed trust labels and taint-tracking that gate tool calls when context contains untrusted segments. | [`kenithphilip/Tessera`](https://github.com/kenithphilip/Tessera) | Downloads per month | | [`NoPII`](https://github.com/Enigma-Vault/NoPII/tree/main/integrations/langchain-nopii-middleware) | 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`](https://github.com/Enigma-Vault/NoPII/tree/main/integrations/langchain-nopii-middleware) | Downloads per month | | [`AxioRank`](https://app.axiorank.com/docs/integrations/langchain) | Security gateway for AI agents: score tool calls and model turns against policy with allow, deny, and redact. | [`AxioRank/langchain-axiorank`](https://github.com/AxioRank/langchain-axiorank) | Downloads per month | | [`OWASP Agent Memory Guard`](https://owasp.org/www-project-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`](https://github.com/OWASP/www-project-agent-memory-guard/tree/main/integrations/langchain-agent-memory-guard) | Downloads per month | | [`DNS-AID`](https://github.com/IngmarVG-IB/langchain-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`](https://github.com/IngmarVG-IB/langchain-dns-aid) | Downloads per month | | [`ATR Guardrail`](https://github.com/Agent-Threat-Rule/agent-threat-rules/tree/main/integrations/langchain) | Runtime detection of prompt injection, tool poisoning, and unsafe tool calls using Agent Threat Rules. Halts the agent or blocks the tool call on a critical finding and keeps an audit trail. | [`Agent-Threat-Rule/agent-threat-rules`](https://github.com/Agent-Threat-Rule/agent-threat-rules/tree/main/integrations/langchain) | N/A | | [`Haldir`](https://haldir.xyz/docs) | Governance layer for LangChain agents with scoped sessions, encrypted secrets, hash-chained audit, and policy enforcement. | [`ExposureGuard/haldir`](https://github.com/ExposureGuard/haldir/tree/main/integrations/langchain-haldir) | N/A | | [`eager-tools`](https://github.com/cloudthinker-ai/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`](https://github.com/cloudthinker-ai/eager-tools) | N/A | | [`langgraph-state-machine`](https://github.com/mahmoud661/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`](https://github.com/mahmoud661/langgraph-state-machine) | N/A |
If you'd like to contribute an integration, see [Contributing integrations](/oss/python/contributing#add-a-new-integration). ***
[Connect these docs](/use-these-docs) to Claude, VSCode, and more via MCP for real-time answers. [Edit this page on GitHub](https://github.com/langchain-ai/docs/edit/main/src/oss/python/integrations/middleware/index.mdx) or [file an issue](https://github.com/langchain-ai/docs/issues/new/choose).