We rewrote our APM metrics guide for 2026. Now covers 9 metrics instead of 7, adding logs and N+1 queries as first-class sections. Also covers how to pipe trace data into AI assistants via MCP for faster diagnosis. www.scoutapm.com/blog/applica...

We wrote about how support works at Scout. No chatbots, no ticket deflection. Real people who built the product answer your questions. AI handles the research on our side so we can skip "can you send a screenshot?" and get straight to helping. www.scoutapm.com/blog/how-we-...

Your AI coding assistant can read your code but is blind to production performance. We shipped a new CLI (with TOON format for LLMs), two MCP servers, and expanded API endpoints to fix that. www.scoutapm.com/blog/getting...

We just sent out our March newsletter. Elixir agent 2.0, Scout CLI on Homebrew, new API endpoints, MCP server updates. Here's the recap if you missed it. www.scoutapm.com/blog/march-n... #elixir #devtools #APM

Scout APM's Elixir agent now powers full Database Monitoring and External Services views — see per-query breakdowns by table and operation, plus per-domain HTTP call tracking via Finch, Req, and Tesla. Same visibility Ruby and Python users already have. scoutapm.com/blog/databas...

Rails just shipped security patches across all 3 maintained branches (v7.2.3.1, v8.0.4.1, v8.1.2.1) fixing 9 CVEs — path traversal, XSS, DoS. Plus Starlette hits 1.0 and Solid Queue adds dynamic recurring tasks. Full roundup: www.scoutapm.com/blog/this-we...

If you happen to work on Elixir and Phoenix and have been craving that Scout experience (minimal time, maximal insight), we have good news. We rolled out LiveView monitoring in a major release. Check it out at www.scoutapm.com/blog/monitor...

Scout surfaces context side-by-side so you investigate the right layer first.
Monitoring should reduce anxiety, not create it.

www.scoutapm.com/blog/application-monitoring-101-how-to-correlate-average-response-time-with-other-metrics

Averages lie politely. Percentiles and queue time tell the truth loudly.

You don't need 1,000 dials; it’s about understanding the 4 things that matter together:
• Avg response time → trend
• p95 → distribution + tail latency
• Throughput → load vs capacity
• Queue time → “waiting” vs “working”

Queue time is the canary. When it climbs, the rest of the dashboard usually follows: p95 gets ugly, timeouts show up, errors spike. Here’s a practical guide to what causes it + how to get ahead of it.

www.scoutapm.com/blog/application-monitoring-101-queue-time-can-alert-before-a-breakdown

Decoding Throughput: Understanding the Signals Between Spikes and Drops Throughput is a powerful performance metric, but it is essentially meaningless in isolation. Once correlated with other application data, you start to get to the heart of what is driving performance…

Quiet failures are our least favorite failures.
Throughput is “kind of” down, nothing is entirely on fire, and your users are just kinda having a worse day.

This post is about catching that stuff earlier.
www.scoutapm.com/blog/decodin...

Take about 5 minutes and install Scout.

It's a low-risk, high-potential-reward adventure that could be just what you've been missing.

Install, then: slow code, new errors, and the logs/traces/perf context, side by side.

Unlimited teammates. Share deep links to the exact trace/endpoint. Rejoice.

Application monitoring 101: averages lie, percentiles clarify Everything looks green and happy on your dashboard, so why are your users upset? Dive into the world of percentiles and how to pull clarity from the metric noise to better understand the health of you...

If you’ve ever stared at “normal” response times while users complain the app feels slow — this post is for you.
We walk through p95, tail latency, GC pauses, DB stalls, and how to spot what’s really happening in your system.

www.scoutapm.com/blog/applica...

GitHub - scoutapp/scout-mcp-local: Scout’s local MCP puts metrics, traces and errors right in your AI agent. For teams that do it all. Scout’s local MCP puts metrics, traces and errors right in your AI agent. For teams that do it all. - scoutapp/scout-mcp-local

You can check out the local Scout MCP server here: github.com/scoutapp/sco...

Adding FastMCP support to the Scout Python Agent Scout Senior Developer Quinn walks us through adding FastMCP instrumentation to our Python agent. The Scout MCP server enables Scout users to query their Scout agent about application performance so…

Quinn just added FastMCP support to the Scout Python agent and wrote up the whole approach.
It’s a practical look at how to instrument MCP tool calls with middleware: spans, arguments, errors, and metadata.
If you’re running your own MCP server, it’s worth a read.
www.scoutapm.com/blog/adding-...

GitHub - scoutapp/scout-mcp-local: Scout’s local MCP puts metrics, traces and errors right in your AI agent. For teams that do it all. Scout’s local MCP puts metrics, traces and errors right in your AI agent. For teams that do it all. - scoutapp/scout-mcp-local

Check out our local MCP server here: github.com/scoutapp/sco...

MCP found a thankless bug faster than us, and it was actually fun Sometimes bugs just need to be fixed ASAP Having AI fix them with monitoring data straight from production is very fast and satisfying You should use Scout for errors and MCP

Some bugs teach you something.
Some just waste your afternoon.

For the latter, let the AI do the work.

On fixing production bugs with Scout’s MCP server → www.scoutapm.com/blog/mcp-fou...

Rechain improves performance visibility and gets 4x faster issue resolution with Scout Monitoring Rechain saw their performance decline as their customer base scaled up. Graduating to Scout helped them get a handle on their issues and fix them before their users even saw them.

Read how Rechain adopted Scout and improved issue resolution by 4x.

www.scoutapm.com/blog/rechain...

Supporting Justice for Youth: How CASA and Ruby for Good Are Making a Difference The CASA organizations connect trained volunteer advocates with children in the foster care system. Ruby for Good is a nonprofit, volunteer-driven organization that connects developers with…

Code doesn’t just power apps, it powers justice.
Ruby for Good + CASA are proof that volunteer devs can change lives.
Full story here:

We launched something new: Scout’s MCP server!

Your coding assistant can now query app data and even propose fixes.

A step toward closing the loop between monitoring + development means more time to spend on what you want to be working on, less time juggling tools.

Check it out: ter.li/vp7re4

Now Live: Error Monitoring in Scout

Scout Monitoring is now the complete platform for developers and lean dev teams to get full visibility into performance, logs, and errors—without setting up three tools.

One tool. One interface. One place to go from bug to fix — fast.

We just shipped error monitoring to GA.
No more finding out your app is broken from an angry user. Get alerted when things go sideways, see exactly what happened, and fix it before your users even notice.
Because reactive debugging is not a business strategy. Learn more here: buff.ly/ePgpsVA

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"Scout has been a massive help in identifying bottlenecks in our application infrastructure as we scale. We’ve been able to identify memory leaks and N+1 queries to shave seconds off our most expensive queries and to improve the reliability of our site.”

-Brett Kushner, COO, Don't Tell Comedy

Scout Gives Cookpad Actionable, Rails-Specific Performance Insights For more than a decade, Cookpad, a global platform for recipe sharing and search, has relied on APM tools to monitor critical application performance metrics, like server response times and resource…

“Scout can track and provide developers with insights for performance improvement. This helps us deliver a better experience to our users.” — Cookpad
www.scoutapm.com/blog/cookpad

Key Early Considerations Before Big Architecture or Technology Decisions In this final part, the Scout team continues our talk with Freedom Dumalo, former CTO at Flexcar and current CTO at Vestmark. We discuss some essential questions about architecture, touch on Rails,…

Making big architecture decisions? Start with your values, not the latest framework.
"Choose boring tech" for parts that don't need to scale, and save the complexity for where it actually matters.
buff.ly/mB6DDPF

Scout helps DynaBliss build medical practice management software DynaBliss, building speciality medical practice platforms with Scout

DynaBliss, with 56k lines of code and 2,100+ components, faced performance challenges in their medical practice management platform. Scout APM improved performance with 70% faster requests and eliminated N+1 query issues. "Let's go to Scout" is now their catchphrase. Learn more: buff.ly/nBcMMsA

Chaskiq Improves Performance 2x with Scout The team was experiencing bottlenecks in their database, n+1 queries, and slow requests and was struggling to catch performance issues in their local testing environment, where traffic patterns…

Chaskiq's devs were fighting N+1 queries and database bottlenecks that were invisible in local testing. New Relic showed them charts but not solutions. Scout showed them the exact code lines to fix. Result: 2x performance boost.
www.scoutapm.com/blog/chaskiq...

Mid-Year Update 2025 Error Monitoring announcement, Ruby and Python agent updates.

📰 Scout mid-year news! Soon: track errors + performance in one place. Smarter grouping, triaging & alerting, GitHub integration, Slack notifications + more! Plus, a list of updates you might have missed!
Full rundown here: www.scoutapm.com/blog/mid-yea...

ForAll Systems Saves Money and Improves Response Times 3X with Scout! ForAll Systems Inc. is a Chicago-based educational technology company with more than 15 years of experience developing assessment software for K–12 school districts. Their team was dealing with N+1…

Scout in EdTech! ForAll Systems got 3X faster average response times and 2X faster inefficient endpoint optimization in their Python applications, while also keeping their team lean.

www.scoutapm.com/blog/forall-...

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"ScoutAPM has been a much better experience than New Relic. It’s easy to use, uncluttered, and works smoothly with Ruby on Rails."
Paritosh Piplewar, Software Engineer at Greentoe www.greentoe.com