Last week, we shipped the first MCP registry registry, added model settings in Playground UI, and published some new docs. Let’s dig in…
The MCP registry registry (and mcp server)
We launched the very first MCP registry registry, which is exactly what it sounds like it is: a registry of the most popular MCP registries.
Since searching within two nested lists can be difficult, we also shipped an MCP registry registry MCP server. Just npm install @mastra/mcp-registry-registry to start asking questions and explore how to use MCP with Mastra Agents.
Model settings in Playground UI
We enabled model setting controls in Mastra local dev. This means you can directly adjust model settings like temperature, max tokens, and max retries when chatting with agents — and learn which settings work best.
New Memory docs section
We shipped new documentation on how Memory works in Mastra. You’ll find core definitions, installation instructions, and all sorts of tools and ideas for customizing memory configurations, e.g.:
In Mastra, context is broken up into three parts: system instructions and information about the user (working memory), recent messages (message history), and older messages that are relevant to the user's query (semantic recall).
In addition, we provide memory processors to trim context or remove information if the context is too long.
That's all for recent major Mastra updates. Find the full release log here. And, as usual, stay tuned for more changes next time…
Happy building 🚀
