Langchain agents

FalkorDB integration for LangChain.js - A blazing fast graph database for AI applications

LangGraph Checkpoint saver using native SQLite for Node.js and Bun.

Three-tier LangGraph checkpoint saver: L1 SQLite -> L2 NATS KV -> L3 PostgreSQL

The simplest way to use LLMs

JWT-gated LLM gateway: authenticate (bcrypt/JWT), then run a LangChain-on-Vertex Gemini completion. Unauthenticated calls are rejected.

LangChain Tool integration for The Factory — x402 micropayment data API

The Mandate Agent SDK — Trust Engine for the Agent Economy

Sign LangGraph tool calls and graph nodes with Vouch Credentials.

LangChain.js security integration for Weave Protocol - callbacks, tool wrappers, and retriever guards

MakerChecker connector for LangChain that wraps a StructuredTool so every invocation runs a deny-by-default governance check and records to the hash-chained audit log.

TypeScript/JavaScript SDK for the Agentum engine — agentic governance & IAM enforcement

Raindrop integration for LangChain Deep Agents

Framework to build secure, performant and reliable chat apps and services quickly and efficiently.

your intelligent agent CLI

TypeScript SDK for Lelu — the authorization engine for autonomous AI agents

Turn Agent402's catalog - 500+ strong: 400+ x402 pay-per-call tools + 100+ skill packs - into LangChain and CrewAI tools for Python agents. Free tier via proof-of-work - no wallet, no API keys.

A LangGraph + Ollama coding agent usable as a library via agent.run(query)

Job hunting + tailored CV generation agent built with LangChain deepagents

LangChain chat model provider for Apple's on-device Foundation Models framework

LangChain retriever for the arXiv

LangChain integration for Concentrate.ai — a unified LLM gateway with the OpenAI Responses API.

LangGraph BaseStore backed by Sibyl Memory (SQLite + FTS5, no vector database, no embeddings).

n8n AI Agent node with native Langfuse integration: tracing + prompt management

LiteLLM chat models, embeddings, credentials, and tool-calling AI agent nodes for n8n

Pylva SDK — cost infrastructure for AI agent businesses

Disclosed sponsored slots for MCP servers and AI agent tools. Ships data, never directives. Fail-open by design.

Cashfree payments tools for AI agent frameworks

Reusable LangGraph agent runtime: intent routing, sticky flows, Redis checkpointer, optional answer cache

LLM agent + LLM-as-Judge + Human-in-the-Loop review + learning loop, as an embeddable library

npm-installable CLI wrapper for agent-trace, deterministic record and replay for LLM agent HTTP traffic. Forwards straight to the real Python agent-trace CLI. Requires Python 3.10+ and the agent-observability-trace-cli PyPI package.

AI agent SDK for web pages — embed a chat assistant that edits page data via schema-validated tools. A lighter, framework-agnostic alternative to CopilotKit/LangChain for in-page JSON-editing agents. Vue-bundled; works with DeepSeek, OpenAI, MCP.

Local AI gateway for OpenCode with tool/function calling — use any model via OpenAI, Anthropic, or Gemini API format

Native cross-platform MCP agent. Inspector → MCPAgent → loop → fetch + @mcp-use/client. LangChain bridge at @mcp-use/agent/langchain.

Gateway Agnostic SDK for Punk's hosted AI gateway: OpenAI, Anthropic, OpenRouter, Vercel AI SDK, LangChain, agent tracing, tool caching, and governance.

Turn LangChain agent runs into portable Zansn evidence packs. Capture traces, tool calls, cost, and readiness with a callback handler.

LangChain tool wrappers for the CRYPTYX x402 API. Drop-in DynamicStructuredTool instances that any LangChain agent can bind — signals, factor scores, institutional trigger evaluation, natural-language query. Payment plumbing handled via @cryptyx/x402-clie

Framework-agnostic Agent Protocol engine for LangGraph.js — run engine, handlers, and SSE, driven entirely by injected dependencies.

Framework-agnostic Agent Protocol engine for LangGraph.js — the heart of skein-js.

A live canvas for LangChain agents — stream documents, charts, and rich artifacts into a React panel.

langgraph.json parser and graph loader (path:export) for skein-js.

Express adapter for skein-js — mount the Agent Protocol on an Express Router.

n8n community node for SiliconFlow (硅基流动). Zero runtime dependencies. Provides a SiliconFlow action node (Chat / Vision / Embeddings / Image / Rerank / Audio TTS+ASR / Video) and a LangChain-compatible Chat Model node for AI Agents. Installs cleanly witho

Next.js adapter for skein-js — serve the Agent Protocol from App Router or Pages Router API routes.

A LangChain callback handler that emits Agent Arc Status Protocol events at chain/agent boundaries.

NestJS adapter for skein-js — serve the Agent Protocol from a Nest module.

Fastify adapter for skein-js — mount the Agent Protocol as a Fastify plugin.

Idiomatic NestJS integration for LangGraph: nodes as providers, typed edge lists, checkpointers, streaming, interrupts, and OpenTelemetry tracing

In-memory SkeinStore + queue driver for development and tests.

Framework-agnostic prebuilt LangChain tools for agents (works with any LangChain/LangGraph app)

Postgres SkeinStore driver with pgvector semantic search, reusing PostgresSaver for checkpoints.

The skein-js CLI — self-host LangGraph.js agents as an open-source alternative to LangGraph Platform; a drop-in replacement for the LangGraph CLI (dev/up/build/dockerfile).

React integration for LangGraph & LangChain

Decorator-first, type-safe authoring layer for LangChain JS tools and agents.

Monitor your AI agents in 3 lines of code — tokens, cost, latency, and silent failures

Fully local web research assistant (LangGraph.js port of langchain-ai/local-deep-researcher) - library, CLI and MCP server

Shared, framework-agnostic building blocks for skein-js HTTP adapters — in-memory dev runtime, LangGraph dev-state import, and langgraph.json CORS mapping.

Archil filesystem adapter for LangChain

LangSmith tracing for skein-js — run identity and thread grouping on every graph call.

Route LangGraph.js tool calls through toolgovern's governTool() gate before they reach ToolNode -- wraps each tool with the classifier, then re-wraps it with LangChain's own tool() factory so it slots into new ToolNode([...]) unchanged.

Prebuilt mda binary for darwin/arm64.

Prebuilt mda binary for linux/x64.

LangChain integration for mekik — surface agent tool calls in the UI, gate them behind human approval, and make them exactly-once across an interrupt/resume.

LangChain/LangGraph callback adapter feeding graph-trace.

Robyn framework adapters — gasless cross-chain tools for Vercel AI SDK, LangChain, Coinbase AgentKit, and raw OpenAI/Anthropic function-calling.

Assembles skein-js ProtocolDeps from langgraph.json + selected drivers (memory/Postgres/Redis).

Prebuilt mda binary for win32/x64.

Prebuilt mda binary for darwin/x64.

Prebuilt mda binary for win32/arm64.

Prebuilt mda binary for linux/arm64.

Kakunin compliance tools for LangChain JS/TS — verify agent certificates and scopes inside tools and chains

Multi-provider AI Chat Model for n8n with sequential failover + retry. Any OpenAI-compatible provider (OpenAI, DeepSeek, NVIDIA, OpenRouter, Groq, ...), one credential per slot.

LangChain tools for Merka2a - the agent-native compute exchange. Search GPU compute, negotiate prices, and place orders.

JWT-gated LLM gateway: authenticate (bcrypt/JWT), then run a LangChain-on-Vertex Gemini completion. Unauthenticated calls are rejected.

LangChain.js document loader for Xberg — extract text, tables, and metadata from 101 document formats with optional OCR.

A CLI that uses a DeepAgents documentation agent to generate and maintain an OpenWiki for a codebase.

ElizaOS plugin for @arcproof/sdk -- native orchestrator + specialist builders (runtime.useModel, no LangChain needed) plus the Action/Plugin wrapper, for a bonded, independently-verified, real-payment agent.

Mastyf AI security middleware for LangChain — intercepts and evaluates tool calls through the Mastyf policy proxy

Run a prompt through a LangChain (system + human) chain over Gemini on Vertex AI; optional LangSmith tracing.

n8n community node for using Elasticsearch as a LangChain vector store (RAG, similarity search, AI agent tool)

Redis job queue and cross-instance pub/sub streaming for skein-js.

LangChain.js integration for the Taguru long-term semantic memory server

LangChain.js provider integration for SiliconFlow (chat + embeddings).

Installs the LangChain 1.x / LangGraph skill (API quick-reference + selection guide for Agents, RAG, tools, structured output, memory, middleware, LangSmith) into a project's .claude/skills folder.

LangChain integration for Talor SERP API - TypeScript version

NoInjection enforcement adapter for LangChain structured tools.

Drop-in OpenAI-shaped client for Cursor models (LangChain / LangGraph optional). Pass apiKey + model.

AI agent packaging for HTTP QUERY — OpenAPI tool schemas, MCP, Vercel AI SDK, LangChain helpers.

Official LangChain JS / LangGraph JS adapters for Wolbarg shared memory — BaseMemory + BaseStore.

Inkling is a CLI that uses a DeepAgents documentation agent to generate, maintain, export, and validate a living wiki for your codebase.

PostHog analytics for skein-js — run lifecycle events plus $ai_generation LLM analytics.

LangChain tools for FLAT Protocol — private agent-to-agent payments via BearerSwap

Tabstack tools for LangChain.js. Schema-enforced web extraction and research, backed by the official Tabstack SDK.

Gate LangChain tool calls behind a signed Fidacy verdict. Wraps the tool itself, so a denied payment never executes: callbacks can only observe, this can stop.

Multi-tenant payment gateway for API monetization with autonomous agent settlement on Base L2. Implements HTTP 402 protocol with USDC micropayments and programmatic fee routing.

LangChain/LangGraph integration for SCT (Secure Compact Tokenization) — reversible, keyed PII pseudonymization (DSGVO/BaFin-grade) plus deterministic tool-output compression and a metered OpenAI-compatible chat model.

Typescript bindings for langchain

LangChain tools for sweeping an agent's native gas balance to exactly zero across 25+ EVM chains.

Structured tracing model for graph agent runs.

Together AI integrations for LangChain.js

Auto-apply Grok 4.5 context compaction to xAI Responses API agent loops. Drop-in client that compacts every N turns or when a token budget is exceeded.