Corsair

What is Corsair?

Corsair is an open source integration layer that connects your product and its AI agents to tools like Gmail, Slack, Notion, HubSpot, and Stripe. It handles OAuth, token refresh, webhooks, and rate limits for every customer, so developers can ship production integrations without maintaining the fragile plumbing behind each one.

Top Features:

• Managed auth: handles OAuth and token refresh, with credentials encrypted in your database.
• Permissions: destructive actions wait for explicit approval through a review link.
• Typed SDK: one TypeScript syntax works across every integration, with or without agents.

Use Cases:

• Agent products: let a chat agent send emails, book meetings, and update CRMs.
• Event triggers: run actions when files reach Drive or messages arrive in Slack.
• In-app buttons: add sync or post actions to dashboards without API glue code.

Who Can Use Corsair?

• AI startups: give agent products access to user apps without building each connector.
• SaaS developers: ship customer-facing integrations with multi-tenant credential isolation already built in.
• Contributors: self-host the full SDK and add missing integrations through pull requests.

Pricing

• Hobby ($0 per month): 50 connections, 100k webhook events, and up to three team members.
• Pro ($200 per month): unlimited connections, webhook events, team members, custom branding, and Slack support.
• Enterprise (contact sales): custom limits, dedicated integrations, and support for larger production deployments.

Pros and Cons

Pros:

• Open source: the Apache 2.0 codebase can be forked, audited, and extended freely.
• Credential safety: agents only see method names and results, never your API keys.
• Built-in caching: cached webhook and polling data per tenant helps avoid rate limits.

Cons:

• Developer only: setup needs TypeScript knowledge, so non-technical users cannot use it.
• Steep jump: moving from the free tier to Pro costs 200 dollars monthly.
• Growing catalog: niche apps may need a community plugin or your own code.

FAQs:

1) Is it free to self-host?

Yes, the full SDK runs on your own infrastructure at no cost.

2) Can agents see API keys?

No, credentials resolve at call time, and agents only see method names and results.

3) Does it need an agent?

No, call it like any typed library to add buttons, actions, and triggers.

4) What if an integration is missing?

Open a pull request, fork the repo, or scaffold a new plugin yourself.

5) Which frameworks does it support?

It works with Next, Node, Express, Hono, SvelteKit, Remix, and Astro projects.