# LogBrew > Agent-first observability for developers. Investigate issues and logs, follow exact trace evidence, and use product analytics from the website, CLI, or API. ## Guides ### Start - [Observability for application investigations with LogBrew](https://docs.logbrew.co/introduction.md): Compare observability with monitoring. Use logs, traces, metrics, and context to examine application behavior. - [Node.js logging with the LogBrew observability quickstart](https://docs.logbrew.co/quickstart.md): Create a project, set up Node.js logging, send one safe SDK event, and read the stored log without showing credentials. ### Concepts - [Application telemetry: logs, traces, and metrics](https://docs.logbrew.co/concepts/telemetry.md): Compare logs, traces, metrics, issues, and product actions. Select the LogBrew signal for your investigation. - [Distributed tracing: traces, spans, and context](https://docs.logbrew.co/concepts/distributed-tracing.md): Learn how distributed traces and spans connect requests, logs, issues, actions, and metrics in LogBrew. - [What is product analytics? Metrics and returning users](https://docs.logbrew.co/concepts/product-analytics.md): Select a project and dates. Read activity, funnels, retention, and lifecycle changes. Check data coverage before you act on the results. - [Software release tracking and deployment monitoring](https://docs.logbrew.co/concepts/releases.md): Use LogBrew release tracking to find issues, logs, traces, actions, and metrics from a code version. Read error rates and deployment context. - [LogBrew project setup and signal checks](https://docs.logbrew.co/concepts/projects.md): Set up a LogBrew project. Choose service and environment names, read setup status, and find your application's test events. ### Install and send - [SDK integration for application telemetry](https://docs.logbrew.co/guides/sdk-ingestion.md): Select a LogBrew SDK for your runtime. Configure its ingest key. Send application telemetry and find the test event in your project. - [Verify LogBrew setup with a project read key](https://docs.logbrew.co/guides/verify-setup.md): Read your test event back from LogBrew with a project read key. Learn what each project key kind can and cannot do. - [Log redaction: keep sensitive data out of logs](https://docs.logbrew.co/guides/safe-capture.md): Select approved log fields. Run a local test for sensitive data. Read the limits of LogBrew JavaScript, Node.js, and browser capture controls. - [API key rotation: rotate a LogBrew ingest key](https://docs.logbrew.co/guides/rotate-ingest-key.md): Rotate a LogBrew ingest key. Test the replacement before planned revocation. Recover from errors without exposing credentials. - [Event tracking setup guide for Node.js](https://docs.logbrew.co/guides/product-events.md): Send classified product events with typed users and sessions from Node.js. Run a local capture test, then read the results with the CLI. - [React Native logging with LogBrew](https://docs.logbrew.co/guides/react-native.md): Install the React Native SDK, send a test log, and find it in the correct LogBrew project. Configure Expo safely and handle delivery errors. - [Flask logging and Flask exception handling with LogBrew](https://docs.logbrew.co/guides/flask.md): Configure Flask logging, capture unhandled exceptions and request traces, and verify each hosted signal with the LogBrew CLI. - [Send OpenTelemetry data to LogBrew with OTLP](https://docs.logbrew.co/guides/opentelemetry.md): Send logs, traces, and metrics from an OpenTelemetry SDK or Collector to LogBrew over OTLP/HTTP, with no LogBrew SDK. - [Supabase log drain and Edge Functions logging with LogBrew](https://docs.logbrew.co/guides/supabase.md): Send Supabase platform logs to LogBrew with a log drain, and capture logs and errors from Supabase Edge Functions with the JavaScript SDK. - [JavaScript source maps with Vite](https://docs.logbrew.co/guides/source-maps.md): Upload JavaScript source maps from a Vite build. Keep credentials out of your app. Map minified stack frames to original source locations. - [iOS crash reporting for Apple crashes and hangs](https://docs.logbrew.co/guides/apple-crashes-and-hangs.md): Set up iOS app crash reporting, upload matching dSYMs, and read symbolicated iOS app crash logs from LogBrew. - [Record deploys and upload source maps with GitHub Actions](https://docs.logbrew.co/guides/github-action.md): Use the LogBrew GitHub Action to upload JavaScript source maps and native debug files and record each deploy from a GitHub Actions workflow. ### Investigate - [Issue triage and resolution in LogBrew](https://docs.logbrew.co/guides/issue-workflow.md): Manage issues in LogBrew. Read the occurrence evidence, find the owner, then resolve, archive, reopen, prioritize, or assign issues to a person or a team. - [Production debugging: investigate errors with LogBrew](https://docs.logbrew.co/guides/investigate-an-issue.md): Investigate application errors with captured evidence. Select one occurrence, inspect its stack and trace, and verify a candidate deployment. - [Application troubleshooting for missing application logs](https://docs.logbrew.co/guides/troubleshooting.md): Troubleshoot missing application logs, project setup, filters, issue evidence, and trace links with safe LogBrew checks. ### CLI and agents - [Install and use the LogBrew CLI](https://docs.logbrew.co/guides/cli.md): Install the LogBrew CLI on macOS, Linux, or Windows. Sign in, select a project, and investigate issues with JSON output. - [AI-assisted debugging with LogBrew](https://docs.logbrew.co/guides/ai-agents.md): Give a coding agent scoped LogBrew evidence to investigate application errors, record missing data, and examine a candidate fix. - [Connect an AI agent with MCP](https://docs.logbrew.co/guides/mcp.md): Connect Claude Code, Claude, VS Code, Cursor, Codex, ChatGPT, or any other MCP client to the hosted LogBrew MCP server. Approve the projects it can read, decide if it can make changes, and manage its connection in Settings or the CLI. ### Support - [Support API: create and track a ticket](https://docs.logbrew.co/guides/report-a-problem.md): Create a LogBrew support ticket from the CLI or the Support API. Add safe diagnostics, track its status, and send follow-up context. ## Reference ### Reference - [Observability glossary and LogBrew terms](https://docs.logbrew.co/reference/terminology.md): Look up LogBrew signal types, project scope, identity, evidence states, and product analytics terms. - [LogBrew CLI reference: commands and filters](https://docs.logbrew.co/reference/cli.md): Find LogBrew commands, filters, cursor pagination, live watch, JSON output, and errors. - [Telemetry API requests, responses, and error codes](https://docs.logbrew.co/reference/telemetry-api.md): Use the LogBrew observability API for telemetry ingestion, scoped reads, analytics, issue updates, and machine-readable errors. - [API query parameters and cursor pagination](https://docs.logbrew.co/reference/telemetry-api-filters.md): Filter LogBrew telemetry by project, service, release, environment, severity, trace, issue status, priority, assignee, and time. Continue results with a cursor. - [API error handling and API error codes](https://docs.logbrew.co/reference/api-errors.md): Read LogBrew API error codes, HTTP statuses, and JSON examples. Use the returned recovery instructions to correct requests and retry safely. - [API response format and JSON response examples](https://docs.logbrew.co/reference/telemetry-response-shapes.md): Read LogBrew API responses for telemetry lists, cursor pages, live events, mutations, success states, and error states. - [Account API and API usage limits](https://docs.logbrew.co/reference/account-api.md): Read LogBrew account usage limits, quota history, subscription readiness, organization invitations, and sign-out responses. ## Optional - [Docs for agents](https://logbrew.co/llms.txt) > The links below point to documentation indexes. Follow each `/_llms/` index recursively until you reach documentation pages. ## Indexes - [Turkish (33 pages)](https://docs.logbrew.co/_llms/tr.txt): Documentation for Turkish. - [German (33 pages)](https://docs.logbrew.co/_llms/de.txt): Documentation for German. - [Spanish (33 pages)](https://docs.logbrew.co/_llms/es.txt): Documentation for Spanish. - [Japanese (33 pages)](https://docs.logbrew.co/_llms/ja.txt): Documentation for Japanese. - [French (33 pages)](https://docs.logbrew.co/_llms/fr.txt): Documentation for French. - [Brazilian Portuguese (33 pages)](https://docs.logbrew.co/_llms/pt-br.txt): Documentation for Brazilian Portuguese. - [Italian (33 pages)](https://docs.logbrew.co/_llms/it.txt): Documentation for Italian. - [Dutch (33 pages)](https://docs.logbrew.co/_llms/nl.txt): Documentation for Dutch. - [Vietnamese (33 pages)](https://docs.logbrew.co/_llms/vi.txt): Documentation for Vietnamese. - [Simplified Chinese (33 pages)](https://docs.logbrew.co/_llms/zh-hans.txt): Documentation for Simplified Chinese. - [Korean (33 pages)](https://docs.logbrew.co/_llms/ko.txt): Documentation for Korean. - [Indonesian (33 pages)](https://docs.logbrew.co/_llms/id.txt): Documentation for Indonesian. - [Polish (33 pages)](https://docs.logbrew.co/_llms/pl.txt): Documentation for Polish. - [Arabic (33 pages)](https://docs.logbrew.co/_llms/ar.txt): Documentation for Arabic. 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