An open-source tool to test and debug MCP servers. Test your MCP server against LLMs from Anthropic, OpenAI, and Ollama.

Re-launching MCPJam, the open source testing tool for MCP servers. It's an inspector alternative with an LLM playground that helps you test your server against LLMs. Thank you so much for the shoutout! Model Context Protocol (MCP)

I seriously need to know who stamp approved these graphs to get published. Also welcome to X Marcelo Jimenez. Everyone follow him, we’re building MCPJam together

Hey Mastra team, do you have any estimates on when Mastra will be compatible with AI SDK 5? I want to work on gpt-5 with Mastra but it’s only on AI SDK 5. I’m hoping this is a high priority on the roadmap! Mastra Abhi Aiyer

We built mcp-ui support in MCPJam playground We just launched support for mcp-ui. mcp-ui is a client SDK that brings UI components to MCP responses. The project is getting some great traction and is already being adopted by some big players like Shopify and Codename Goose

Pretty fun project with the mcp-use (YC S25) X Elastic hackathon, building with Marcelo Jimenez. The project was to build an agent with mcp-use that can search for MCP servers in an elastic DB and automatically install the server. MCP discoverability is a huge issue. I can see a future

Small caveat with using Mastra's MCPClient If you're using the client's elicitation handler, make sure to register the elicitation handler AFTER you trigger the MCPClient to connect to the servers. Mastra