# What Is Corsair? Understanding the Open-Source Product Integration Platform

> Discover Corsair, the open-source integration platform simplifying app connections. Achieve a unified API for agents, back-ends, and dashboards to various services effortlessly.

- Repository: [corsairdev/corsair](https://github.com/corsairdev/corsair)
- Tags: getting-started
- Published: 2026-09-01

---

**Corsair is an open-source product integration platform that provides a single, unified API for connecting applications—agents, back-ends, and user dashboards—to a wide variety of third-party services without writing separate glue code for each external API.**

The Corsair project (`corsairdev/corsair`) solves a common developer pain point: every new third-party service requires custom integration code, authentication handling, and maintenance. Corsair eliminates this duplication by offering a consistent, self-hosted integration layer with a unified developer experience across all services.

## Core Purpose: A Unified Integration Layer

At its heart, Corsair serves as a **unified integration layer**. Instead of writing separate glue code for each external API, developers write one Corsair configuration using `createCorsair` and get consistent syntax for every integration.

This design is documented in the root [`README.md`](https://github.com/corsairdev/corsair/blob/main/README.md) where the project describes its philosophy: provide one integration pattern that works whether you're connecting to GitHub, Slack, or any other supported service.

### Key Design Principles

- **Single configuration point** – The `createCorsair` function accepts plugins and returns a typed client for all configured services
- **Plugin-based architecture** – Each third-party service ships as a separate package (e.g., `@corsair-dev/github`, `@corsair-dev/slack`)
- **Consistent API surface** – Every plugin exposes methods following the same patterns, reducing cognitive load

## REST-API-First Architecture

Corsair runs as a **REST service**, making its adapters usable by agents, server-side services, or UI dashboards alike. This architectural choice means:

- **Language-agnostic consumption** – Any client that can make HTTP requests can use Corsair integrations
- **Microservice-friendly** – Deploy as a standalone service that multiple applications share
- **Agent-ready** – AI agents can call Corsair endpoints to interact with external tools without direct API knowledge

The REST-first approach is explicitly called out in the project's documentation as a core architectural decision rather than an afterthought.

## Self-Hosted and Open-Source

All adapters and the core platform are **open source**, allowing users to host their own instance or use the managed Hub service while keeping tokens and data under their control. This addresses a critical concern for security-conscious teams: third-party API credentials and user data remain within your infrastructure.

The root [`README.md`](https://github.com/corsairdev/corsair/blob/main/README.md) emphasizes this point in lines 27-30, positioning Corsair as a privacy-respecting alternative to fully managed integration platforms.

## Getting Started with Corsair

### Basic Setup in TypeScript

Source: [`packages/corsair/README.md`](https://github.com/corsairdev/corsair/blob/main/packages/corsair/README.md) (lines 12-26)

```typescript
import { createCorsair } from 'corsair';
import { github } from '@corsair-dev/github';
import { slack } from '@corsair-dev/slack';

export const corsair = createCorsair({
  plugins: [github(), slack()],
  database: db,
  // Hub credentials (optional if you self-host)
  hub: {
    projectApiKey: process.env.CORSAIR_DEV_API_KEY!,
    signingSecret: process.env.CORSAIR_DEV_SIGNING_SECRET!,
  },
});

```

This configuration demonstrates the core pattern: import plugins, pass them to `createCorsair`, and receive a fully typed client.

### Using an Integration in an Agent

```typescript
// Example: fetch a user's GitHub repos
const repos = await corsair.github.repos.listForUser({
  username: 'octocat',
});

```

Notice how the API follows natural language patterns—no raw HTTP requests or manual URL construction required.

### Handling Webhooks

Source: [`packages/slack/webhooks.integration.test.ts`](https://github.com/corsairdev/corsair/blob/main/packages/slack/webhooks.integration.test.ts) (lines 2-9)

```typescript
import { createCorsair } from 'corsair/core';
import { createCorsairOrm } from 'corsair/orm';
import { testDb } from './test-db';

const corsair = createCorsair({
  plugins: [corsair.slack()],
  database: testDb.database,
});

export async function handleSlackEvent(event) {
  await corsair.slack.webhooks.process(event);
}

```

Webhook handling uses the same `createCorsair` pattern, ensuring incoming events from third-party services integrate cleanly with your application logic.

## Key Implementation Files

Understanding Corsair's purpose requires examining how the codebase implements this vision:

| File | Role |
|------|------|
| [`README.md`](https://github.com/corsairdev/corsair/blob/main/README.md) (root) | High-level project overview, rationale, and licensing |
| [`packages/corsair/README.md`](https://github.com/corsairdev/corsair/blob/main/packages/corsair/README.md) | Core library documentation and basic usage |
| [`www/src/server/corsair.ts`](https://github.com/corsairdev/corsair/blob/main/www/src/server/corsair.ts) | Production server implementation showing plugin initialization |
| [`packages/github/index.ts`](https://github.com/corsairdev/corsair/blob/main/packages/github/index.ts) | Example integration adapter exposing uniform API |
| [`docs/plugins/README.md`](https://github.com/corsairdev/corsair/blob/main/docs/plugins/README.md) | Guidelines for adding new plugins (structure, registration) |
| [`scripts/generate-plugin-from-json.ts`](https://github.com/corsairdev/corsair/blob/main/scripts/generate-plugin-from-json.ts) | Tool scaffolding new plugins from JSON specifications |

These files collectively demonstrate how Corsair fulfills its purpose: the generator script automates adapter creation, the documentation ensures consistency, and the server implementation shows real-world deployment.

## Plugin Ecosystem and Extensibility

Corsair's purpose extends beyond its current integrations. The project includes tooling to expand its reach:

- **Automated plugin generation** – [`scripts/generate-plugin-from-json.ts`](https://github.com/corsairdev/corsair/blob/main/scripts/generate-plugin-from-json.ts) creates boilerplate adapters from API specifications
- **Documented conventions** – [`docs/plugins/README.md`](https://github.com/corsairdev/corsair/blob/main/docs/plugins/README.md) establishes patterns for consistent plugin development
- **Open contribution model** – New integrations follow established patterns, growing the unified ecosystem

This extensibility ensures Corsair's value compounds as more services are added, without fragmenting the developer experience.

## Summary

- **Corsair eliminates duplicated integration code** by providing a single `createCorsair` configuration for all third-party services
- **REST-API-first architecture** enables use by agents, backends, and dashboards without language constraints
- **Self-hosted and open-source** keeps credentials and data under your control, with optional managed Hub service
- **Plugin-based design** with automated generation tools supports scalable ecosystem growth
- **Consistent developer experience** across all integrations reduces maintenance burden and onboarding time

## Frequently Asked Questions

### What problem does Corsair solve that existing tools don't?

**Corsair addresses integration sprawl.** While tools like Zapier or n8n provide visual workflow builders, Corsair targets developers who need programmatic control with consistent code patterns. Unlike SDK-specific libraries, Corsair unifies multiple services under one API surface, eliminating the need to learn different patterns for each integration.

### Is Corsair only for TypeScript/JavaScript projects?

**No.** While the core implementation is TypeScript, Corsair's REST-API-first architecture means any language can consume its endpoints. The server at [`www/src/server/corsair.ts`](https://github.com/corsairdev/corsair/blob/main/www/src/server/corsair.ts) demonstrates hosting Corsair as a standalone service that Python, Go, or other language clients can call via HTTP.

### How does Corsair handle authentication with third-party services?

**Through plugin configuration and optional Hub integration.** Each plugin accepts service-specific credentials during initialization. The optional Hub service (configured via `projectApiKey` and `signingSecret`) provides managed credential handling, though self-hosted deployments can omit this and manage tokens entirely within their infrastructure.

### Can I add custom integrations to Corsair?

**Yes.** The project provides [`scripts/generate-plugin-from-json.ts`](https://github.com/corsairdev/corsair/blob/main/scripts/generate-plugin-from-json.ts) for scaffolding new adapters and [`docs/plugins/README.md`](https://github.com/corsairdev/corsair/blob/main/docs/plugins/README.md) for implementation guidelines. Custom plugins follow the same registration pattern as official ones: create a package, implement the adapter interface, and pass it to `createCorsair` alongside other plugins.