Grape Performance Monitoring
Errors, logs, and traces for your Grape API applications. Scout's Ruby agent instruments Grape endpoints automatically, detects N+1 queries in ActiveRecord, and connects exceptions to the full request trace. Works with standalone Grape and Grape mounted on Rails or Rack.
Errors, Logs, and Traces
Errors, Logs, and Traces in One View for Grape APIs
Scout connects Grape API endpoint exceptions to the full request trace and surrounding log lines in a single view. When an endpoint raises an error, you see the exception, the trace with per-operation timing, and the log context together. No switching between separate tools.
Error Monitoring
Automatic exception capture across Grape API endpoints and any Sidekiq or Resque workers running alongside. Errors are grouped, linked to the originating trace, and enriched with request context.
Log Management
Log output is enriched with trace context. Filter logs by trace ID to see exactly what a specific API request did, including ActiveRecord queries, Redis calls, and HTTP requests made during the call.
App Traces
Transaction tracing with code-level visibility into Grape endpoint handlers, ActiveRecord queries, and external HTTP calls. Detailed backtraces show the exact line of code responsible for slow API responses.
Query Analysis
N+1 Detection in Grape API Endpoints
Scout automatically detects N+1 query patterns in ActiveRecord within Grape endpoint handlers and background jobs. The agent identifies repeated query patterns, shows the code location, and reports the total performance impact. No configuration required.
Auto-Instrumentation
What Scout Instruments in Your Grape App
Scout's Ruby agent auto-instruments Grape at the Rack middleware level. ActiveRecord, Redis, ElasticSearch, Mongoid, Moped, and HTTP clients including Net::HTTP, HTTPClient, and Typhoeus are captured automatically. Background job frameworks including Sidekiq and Resque appear with per-job timing. Works with standalone Grape, Grape mounted on Rails, and Grape mounted on other Rack apps.
Supported Frameworks
Works with the Grape frameworks you already use
Scout auto-instruments the frameworks and libraries in your stack. No manual configuration required.
API Frameworks
- Grape
- Rack
- Sinatra
Databases
- ActiveRecord
- Redis
- ElasticSearch
- Mongoid
Background Jobs
- Sidekiq
- Resque
- GoodJob
- DelayedJob
HTTP Clients
- Net::HTTP
- HTTPClient
- Typhoeus
Memory Profiling
Memory Bloat Detection for Grape
Grape API processes and their background workers can accumulate memory over time. Scout detects memory bloat at the transaction level, showing which endpoint handlers and code paths are responsible for memory growth. Requires Ruby 2.1+.
AI Native
Query Your Grape App Data from AI Assistants and the Terminal
Scout offers hosted and local MCP servers with 17 tools, a Go CLI available via Homebrew with TOON format for LLM output, and a public API. Query your Grape API's errors, traces, and N+1 insights from Claude Code, Cursor, or the terminal.
MCP Server
Hosted or local MCP server with 17 tools covering apps, endpoints, traces, errors, insights, background jobs, and usage data. Works with Claude Code, Cursor, VS Code Copilot, and any MCP-enabled assistant.
Scout CLI
Go binary available via Homebrew. Query app metrics, endpoint performance, traces, error groups, and insights from the terminal. Outputs human-friendly tables or TOON format for LLM consumption.
Public API
Full programmatic access to your monitoring data for building custom integrations, dashboards, or automation workflows.
Get Started in Minutes
Add Scout to Your Grape App
Get Scout running on your Grape app in under 3 minutes.
Add to your Gemfile:
gem 'scout_apm'Run:
bundle installDownload your customized config file, placing it at config/scout_apm.yml.
Deploy.
FAQ
Grape Monitoring FAQ
What is the best monitoring tool for Grape APIs?
Scout Monitoring instruments Grape endpoints automatically at the Rack level. Every API call appears as a transaction with per-operation timing, ActiveRecord N+1 detection, error capture, and log context. Works with standalone Grape and Grape mounted on Rails or Sinatra.
How do I add APM to a Grape API?
Add the scout_apm gem to your Gemfile, run bundle install, add a config file at config/scout_apm.yml, and deploy. Scout instruments Grape at the Rack middleware level so it works with any Grape configuration without changes to your endpoint code.
Does Scout detect N+1 queries in Grape endpoints?
Yes. Scout automatically detects N+1 query patterns in ActiveRecord within Grape endpoint handlers. The agent identifies repeated query patterns, shows the exact code location, and reports the performance impact. No configuration or annotation required.
Does Scout work with Grape mounted on Rails?
Yes. Scout instruments both the Rails application and any Grape APIs mounted within it. Each Grape endpoint appears as a separate transaction in Scout with its own timing breakdown. ActiveRecord N+1 detection, memory bloat, and error capture all work across both the Rails and Grape layers.
Does Scout support error monitoring for Grape?
Yes. Scout captures exceptions from Grape endpoints automatically. Each error is linked to the request trace and surrounding log context so you see the error, the full trace, and the log lines in one view.