# Integrations

Connect any stack to Kopai with OpenTelemetry. Guides for 11 languages, 3 frameworks and 2 log sources, or let your agent set it up with the Kopai skills.

The fastest way to connect your app is to install the [Kopai skills](/docs/skills/) with `npx skills add kopai-app/kopai-mono` and ask your coding agent to add observability. It instruments your code with OpenTelemetry and confirms the data reaches Kopai, as the [Quickstart](/docs/quickstart/) shows. The guides below are the same setup by hand, and they also cover what the skills do not handle yet: browser JavaScript, Mastra, LangChain and infrastructure logs.

## Languages

- [Node.js](/docs/integration/languages/node/) — Node.js apps report traces and logs to Kopai through OpenTelemetry auto-instrumentation. Install the Kopai skills and your coding agent sets it up.
- [Browser / React](/docs/integration/languages/browser/) — Trace React, Vue, Angular or plain JavaScript in the browser with OpenTelemetry, using a Kopai frontend token that is safe to ship in your bundle.
- [Python](/docs/integration/languages/python/) — Instrument a Python service with OpenTelemetry and watch its traces and metrics arrive in Kopai. Your agent can do the setup through the Kopai skills.
- [Go](/docs/integration/languages/go/) — Send Go traces to Kopai with the OpenTelemetry SDK and its OTLP HTTP exporter. Let your coding agent wire it up for you, or follow the manual steps.
- [Java](/docs/integration/languages/java/) — Trace Java apps in Kopai with zero code changes using OpenTelemetry's auto-instrumentation jar, or let your coding agent set it up with the Kopai skills.
- [.NET](/docs/integration/languages/dotnet/) — Add OpenTelemetry to ASP.NET Core and export .NET traces, metrics and logs to Kopai. Wire it by hand, or leave it to your agent and the Kopai skills.
- [Ruby](/docs/integration/languages/ruby/) — Ruby apps ship traces to Kopai with the OpenTelemetry SDK gems and optional auto-instrumentation. With the Kopai skills, your coding agent adds them.
- [PHP](/docs/integration/languages/php/) — Connect a PHP app to Kopai with the OpenTelemetry SDK and OTLP exporter from Composer. Your coding agent sets it up once you add the Kopai skills.
- [Rust](/docs/integration/languages/rust/) — Export Rust traces to Kopai using the opentelemetry, opentelemetry_sdk and opentelemetry-otlp crates. Ask your agent to do it, or follow this guide.
- [C++](/docs/integration/languages/cpp/) — Link OpenTelemetry into C++ apps with CMake or vcpkg and export spans to Kopai over OTLP HTTP. Your agent can handle the build setup via the Kopai skills.
- [Erlang/Elixir](/docs/integration/languages/erlang/) — Erlang and Elixir services send traces to Kopai through the OpenTelemetry SDK and OTLP exporter. The Kopai skills let your agent do the wiring.

## Frameworks

- [Next.js](/docs/integration/frameworks/nextjs/) — Get Next.js routes and server actions into Kopai with @vercel/otel or the full OpenTelemetry SDK. Or hand the job to your agent with the Kopai skills.
- [Mastra](/docs/integration/frameworks/mastra/) — See Mastra agent runs, LLM calls, tool executions and workflow steps in Kopai by adding the @mastra/otel-exporter package and pointing it at your endpoint.
- [LangChain](/docs/integration/frameworks/langchain/) — LangChain traces reach Kopai through LangSmith's OpenTelemetry export, with no SDK code and no LangSmith cloud. See chain runs, LLM calls and tools.

## Infrastructure logs

- [journald](/docs/integration/infrastructure-logs/journald/) — Ship systemd journal logs to Kopai with the OpenTelemetry Collector's journald receiver. No code changes, no file tailing, no duplicates across restarts.
- [rsyslog](/docs/integration/infrastructure-logs/rsyslog/) — Forward syslog from legacy Linux services to Kopai through rsyslog and the OpenTelemetry Collector, without touching a line of the applications' code.