MCPJam for MCP client teams
Ship a client that keeps pace with ChatGPT and Claude.
Server developers expect the same capabilities everywhere they connect. MCPJam tracks what the major AI clients support across ChatGPT, Claude, and Cursor, so you can expose the ones developers rely on and see how servers behave in your client before your users do.
What MCPJam does for client teams
Parity you can measure
MCPJam tracks what each major AI client supports across protocol and OAuth spec versions, so you can see exactly where your client stands next to ChatGPT and Claude.
Expose the capabilities that matter
See which MCP capabilities server developers actually rely on across clients, so you support the ones that keep servers working instead of guessing.
Fewer broken integrations
Every server that tests against your client before launch is one less broken integration your users hit. The coverage compounds in your favor.
Parity, tracked centrally
MCP capabilities land unevenly. One client supports a protocol feature or OAuth spec version before another, and server developers hit the gaps one bug report at a time. MCPJam tracks current client behavior across the major hosts and compares it side by side, so you can see where your client leads and where it lags. It's expanding into a public capability matrix for the whole ecosystem.
Work with us
This starts with a conversation, not a form. We'll walk through what we track per client, from capabilities to spec-version support to behavior, verify it against your current release, and keep it current as you ship, so server developers see your client as it really is.
Frequently asked questions
The major AI clients, including Claude, ChatGPT, Gemini, and Cursor. We keep their behavior current as hosts change, and add coverage as new clients launch.
Through maintained emulations and hands-on verification of how each host handles tools, protocol details, and OAuth spec variants, and directly with vendors when they work with us.
Talk to us. We'll walk through what we track per client, verify it against your current release, and set up a channel for keeping it accurate as you ship.
Make sure servers test against the real you.
Get your client represented accurately, from capabilities to spec versions to behavior.