rails-informant
Self-hosted error monitoring for Rails with MCP server for agentic workflows
Ficha actualizada 23 sept 2026, 10:37 · upstream 23 sept 2026, 10:04 · release v0.5.3
Qué es rails-informant
Descripción editorial construida a partir del repositorio, su documentación y sus señales de mantenimiento.
Rails Informant is a self-hosted error monitoring solution built specifically for AI agents and developer tools. It captures exceptions, stores them in your application's database with rich context including backtraces, breadcrumbs, request data, and user information. The platform exposes an MCP (Model Context Protocol) server that allows AI agents to query, triage, and resolve production errors directly within their workflow without needing a traditional dashboard or external tooling. The architecture is designed for agent-native workflows where the agent itself serves as the interface to error resolution.
- AI agents can list, inspect, and resolve production errors directly from the MCP server
- Self-hosted monitoring with complete data sovereignty — no data leaves your infrastructure
- Eliminate dashboard dependency by making the agent itself the primary interaction point
- Context-rich error resolution where every occurrence includes full stack traces, request context, and user information
- Auto-resolve stale errors on deployment via deploy notifications and verification checks
- Selective capture of specific exception types without affecting normal Rails HTTP 4xx responses
- Agent-native interface — the MCP server enables AI agents to list, inspect, resolve, and fix errors directly in their workflow context
- Self-hosted with zero external dependencies — all data stays within your infrastructure
- Automatic noise suppression for common Rails exceptions while preserving real bugs like job failures or race conditions
- Contextual fingerprinting that preserves sensitive information (email, IP) only when explicitly opted-in via configuration
- Auto-resolve stale errors on deployment with automatic re-opening of resolved issues upon regression
- Developer-friendly CLI and MCP tools for manual investigation alongside agent automation
- No built-in rate limiting — must be implemented externally using Rack::Attack or similar libraries
- Only captures exceptions raised by Rails itself, not errors from third-party gems or external dependencies
- Requires a database to store error occurrences (Redis is optional but recommended for performance)
- The MCP server requires HTTPS and authentication tokens in production environments
- No built-in retry logic — job failures must be handled manually via the CLI or agent workflow
Perfil de infraestructura
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Install RailsInformant by adding it to your Gemfile, running bundle install, then executing bin/rails generate rails_informant:install and bin/rails db:migrate. Configure authentication tokens in credentials for API access and MCP server communication. Set environment variables INFORMANT_API_TOKEN, INFORMANT_PRODUCTION_URL, and INFORMANT_PRODUCTION_TOKEN for the MCP server to authenticate requests. Enable noise suppression by default but customize ignored exceptions per application needs. For multi-environment setups, configure separate URLs and tokens per environment. The gem includes a doctor command that reports whether installed files are current or stale relative to your local version.
Stack y dependencias
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