Setting up Sentry logs
Sentry logs is now generally available for all users. Serge walks us through how to quickly set it up in a Next.js app.
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The core KPIs of LLM performance (and how to track them)
A few months ago, I built an MCP server for Toronto’s Open Data portal so an agent could fetch datasets relevant to a user’s question. I threw the first version together, skimmed the code, and everything looked fine. Then I asked Claude: “What are all the traffic-related data sources for the city of Toronto?” The tool call fired. I got relevant results. And then I hit an error: “Conversation is too long, please start a new conversation.” I had only asked one question.
Debugging with Session Reply
What is a Session Replay? Record video-like user-sessions to debug your app. Sessions Replays show you what happened and when, along with providing you with all of the relevant logs and traces to debug a user issue without them ever needed to write in.
How to measure and fix latency with edge deployments and Sentry
A 2017 study by Google, researchers found: That was over 8 years ago. And let’s be honest, it’s not likely users have found any additional patience in that time. Web Vitals are a set of performance metrics defined by Google that measure user experience. They focus on things like LCP (how long the main content takes to load), INP (how quickly the page responds to input), and CLS (how visually stable the app is, meaning whether content shifts unexpectedly).
React Native performance tactics: Modern strategies and tools
This is a guest post by Simon Grimm, founder of Galaxies.dev, a platform dedicated to helping developers master React Native through hands-on courses, expert guidance, and personal support. React Native performance matters more in 2025 than ever before. With the New Architecture now stable and apps competing against lightning-fast native experiences, users expect sub-second load times and buttery-smooth 60fps interactions.
Sentry MCP server monitoring
We just launched MCP server monitoring in beta. You can instrument most server-side JavaScript SDK based MCP servers with one line of instrumentation code within your MCP SDK implementation using: wrapMcpServerWithSentry(McpServer) See details like protocol usage, client usage, traffic, tool usage, and performance across your MCP implementation so you you can get visibility into all the sharp edges that your MCP server has — who’s using it, how it’s working (or not), and get alerted when things break.
Building MCP - 0 to Monitored with Vercel, Next.js and Sentry
Build an MCP server starting from 0 using Vercel's Next.js template, and ends in generating hot takes in the tone of David Cramer. Scaffold Sentry, add tool calls via Cursor CLI, and setup MCP monitoring with Sentry's new wrapMcpServerWithSentry method.
You built the MCP server. Now track every client, tool, and request with Sentry.
TL;DR - Starting today, you can instrument most server-side JavaScript SDK based MCP servers with one line of instrumentation code within your MCP SDK implementation. Click to Copy Click to Copy With this in place, you’ll be able to see details like protocol usage, client usage, traffic, tool usage, and performance across your MCP implementation.
MCP Server Observability is here!
Lets be real, who really knows whats happening inside MCP Server? Well, now you can! We've been building our MCP Server for the past few months, and we've taken all the tools that we've used to debug it and turned them into a set of observability tools to help you monitor your MCP servers end to end.