Changelog

Improving AppSignal, one deploy at a time.

Jan 06, 2026

Heroku Fir support

We've added Heroku Fir support.

By pointing Heroku Fir's telemetry drain to our collector we report the following:

  • Host metrics: CPU usage, memory usage and free memory.
  • Metrics from add-ons, such as PostgreSQL and Redis. These will be visible in automatically added dashboards.
  • Logs from the Heroku router and API.

For more information, see the Heroku Fir sections in our Heroku documentation.

Jan 06, 2026

OpenTelemetry performance alerting

AppSignal supports OpenTelemetry trace data. It's now possible to set up performance alerting for traces.

In a trace summary view, click the "Add new" link in the "Triggers" box.

Trace summary page with the triggers box highlighted

In the opened "New trigger" modal, configure the alerting, select your preferred notifier, and save the trigger.

It is possible to configure alerting on the mean response time of requests, and the 90th and 90th percentile of the response time. Use a warm-up to only be alerted if this continues for as long as the warm-up is configured.

New trigger modal with the slow actions form highlighted

Now, AppSignal will alert you about new slow actions.

New trigger modal with the slow actions form highlighted

Note: This only works for our OpenTelemetry tracing feature.

Jan 06, 2026

Vercel drains: Speed insights and traces

AppSignal supports more Vercel drains: Speed Insights and OpenTelemetry traces.

Speed Insights

Vercel Drains provide support for Web Vitals through the Speed Insights drain, like First Contentful Paint and Largest Contentful Paint. These metrics can serve as signals for delivering great user experience on the web. When Speed Insights metrics are detected, we will automatically create a "Web Vitals" dashboard for your application.

Traces

Report traces from Vercel's infrastructure to get more insights into how all parts of your application are performing. This works with our OpenTelemetry tracing feature and will report errors and performance data from your application and Vercel infrastructure (Vercel functions and edge network).


For more information, see these documentation pages:

Dec 18, 2025

New chart type: Number chart

Added a new chart type for dashboards: the number chart. The number chart displays a number on the dashboard instead of a line graph. Useful when a single value gives enough information at a glance.

The chart supports multiple ways of calculating the metric data for the timeframe selected, such as:

  • Maximum value: Show the highest metric value.
  • Minimum value: Show the lowest metric value.
  • Average value: Show the average of the metric values.
  • Total value: Show the combined value of the metric values.
  • First value: Show the first metric value.
  • Last value: Show the last metric value.

To add a number chart, go to your application in AppSignal, create or open a dashboard, click "Add chart", and select "Number" in the sidebar.

Screenshot AppSignal UI showing a number chart
Nov 17, 2025

Markdown support for status pages and MCP updates

Added

  • Add support for markdown on the AppSignal status pages. You can now use markdown in the main description, and status updates.
    AppSignal Status page markdown example
  • Add get_triggers MCP Tool. This tool exposes all the anomaly detection triggers and is in preparation for the create/update trigger tool.
  • Add get_app_resources MCP Tool. This tool exposes multiple application resources such as users, namespaces, and dashboards. It will be the home of application resources that do not need any additional filtering.

Removed

  • Remove get_users MCP tool in favor of get_app_resources.
  • Remove get_namespaces MCP tool in favor of get_app_resources.
Oct 15, 2025

UI Fixes and Search Improvements

Fixed

  • Add a fix for a minor UI bug in the PHP and Go OpenTelemetry app installation flows.
  • Ensure that in the UI, we handle the alert openedAt value being null.
  • Remove the leading and trailing whitespace when submitting a search query.
Sep 25, 2025

Copy error backtrace lines

Added

  • Users can now copy the sample backtrace line with a click of a button. (This feature was requested in our Discord channel).

    Screenshot AppSignal UI showing a copy button at the end of a backtrace line

Fixed

  • Fixed search functionality for queries containing special characters (like BSON::ObjectId('.)
Sep 09, 2025

MCP Anomaly Incidents

Added

  • MCP get_incident tool now supports both exception and anomaly incidents

Fixed

  • Ensure the graph export popover isn’t cut off when placed at the bottom of the page.
Sep 08, 2025

MCP and product updates

Added

  • Added a link to the docs in the trace timeline overlay explaining how to add additional instrumentation
  • Added Anomaly incidents MCP tool
  • Added a toggle switch to show OpenTelemetry internal attributes
    Screenshot AppSignal UI showing a toggle to show internal tracing attributes

Changed

  • We've changed the MCP Token UI to better reflect the allowed tools. Instead of sections that can have read/write/delete rights, we're now showing each individual tool with a checkbox for exposure.
    Screenshot AppSignal UI showing a list of MCP tools and a checkbox to expose them
Sep 01, 2025

Log trigger filtering

Added

  • Add functionality that allows filtering log triggers by name, source, or creator.
    Screenshot of log trigger filtering
Aug 28, 2025

MCP improvments, and Logs Updates

Added

  • Add 3rd party integration links (e.g. GitHub, Jira) to MCP get_incident tool. The AI Agent can use this to tie incidents to external issues.
  • Add uptime monitoring metrics to the MCP metric discovery tool
  • Support ANSI colors in Logs page
  • Persist the option to hide the logs chart between queries.
Aug 27, 2025

Logging updates

Added

  • Add examples and “click to apply” functionality for IN and NOT IN in the logs search dropdown.
  • Log sources now support automatic format detection. We will attempt to parse the line as JSON, Logfmt, and plain text, extracting attributes on every step.

Changed

  • Hitting the escape key trying to close the log query help tool doesn't clear the query anymore.
Aug 15, 2025

MCP Updates

Added

  • Add the create_incident_note tool for the MCP server. This allows AI Agents to comment on incidents.
    Screenshot 2025-08-14 at 12 20 09

Changed

  • The update_incident MCP Tool now accepts severity as an argument (and sets the severity accordingly).
Aug 11, 2025

Download samples as JSON

Added

  • Allow downloading samples as JSON
  • Include Unassigned option in the assignee filter
  • Add a callout to the instrumentation docs when the trace timeline has a few items

Fixed

  • Fix visual bugs in the integration button dropdown.

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