Arcade.dev Tools Now in LangSmith Fleet: 7,500+ Production-Ready MCP Tools with Per-User Auth

LangChain Blog·medium signal

LangChain integrated Arcade.dev's library of 7,500+ agent-optimized tools into LangSmith Fleet, delivering the largest single injection of production-ready tools into the MCP ecosystem. Arcade provides per-user, session-scoped authorization with least-privilege enforcement at runtime — each action inherits the permissions of the specific user the agent acts for. The integration includes 60+ production-ready templates for sales, marketing, engineering, and support use cases, addressing the persistent enterprise pain point of connecting autonomous agents to dozens of SaaS apps (Slack, Salesforce, Jira, etc.) securely.