Tessl

Authenticated toolkits that give AI agents access to SaaS apps, via MCP or API.

Tool layer that gives AI agents secure, managed access to 1000+ toolkits and 20,000+ tools across SaaS apps, exposed via MCP or direct APIs. It handles authentication, tool search, and context management, and its MCP Gateway hands each team a managed endpoint to paste into Claude, Cursor, or ChatGPT. The core is MIT-licensed; a free tier covers 20K tool calls per month.

Registry and hosting platform for Model Context Protocol servers.

A central hub for the MCP ecosystem: browse, install, and configure thousands of community-built MCP servers from one place, or deploy your own to Smithery's infrastructure and access it remotely. The CLI installs and manages servers without hand-editing JSON config, and the hosted tier adds managed OAuth and persistent connections so agents get authenticated tool access. Lists over 6,000 servers across developer tools, data connectors, and productivity integrations.

The MCP runtime for secure, authenticated agent tool-calling.

A platform that lets AI agents take real, authenticated actions across business systems like Gmail, GitHub, Slack, and Notion. Arcade handles the hard part of agent tool-use — secure, per-user authorization — so a tool call runs with the actual end user's permissions rather than a shared API key. It ships agent-optimized prebuilt tools plus an open framework for building custom ones, exposed over MCP. A free tier is available for getting started.