Corsair
Open-source TypeScript integration layer that gives AI agents and SaaS apps managed OAuth, webhooks, and multi-tenant credential handling
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Corsair is the right pick for TypeScript developers who want to ship third-party integrations into an AI agent or SaaS product without writing OAuth plumbing from scratch. Its flat pricing and unlimited tool calls give it a real cost edge over usage-metered rivals as agent call volume grows, but the project is pre-seed, early-stage, and thin on independent reviews, so teams with compliance or SLA requirements will find the trust record too short. If you need a no-code workflow layer rather than an in-code SDK, look at Orkas instead.
What is Corsair?
Corsair is an open source integration layer that lets AI agents and apps connect to any API - GitHub, Slack, Gmail, and 200+ other services through one consistent syntax, instead of building OAuth, token refresh, and webhook handling separately for each one.
It runs inside your own application, so user credentials stay encrypted in your own database rather than on Corsair's servers. A hosted Hub takes care of connect pages and OAuth callback URLs, so you skip that setup too.
Built natively on the Model Context Protocol (MCP), it fits directly into AI agent workflows and supports Next.js, Node, Express, Hono, SvelteKit, Remix, and Astro.
Free to start - unlimited tool calls, 50 connections, up to 3 team members, no credit card required.
Best for: developers and teams building AI agents or SaaS products who need reliable third-party integrations without maintaining integration plumbing for every new API.
How we scored Corsair
Capability scores 20 because the MCP-native architecture, 200+ integrations, per-tenant credential isolation, and approval flows for destructive actions are genuinely well-designed for the AI agent use case, though the project is young and the integration catalog depth has not been independently verified at scale. Ease of use scores 18 because the SDK targets TypeScript developers specifically and framework support is broad, but there are no documented tutorials, video walkthroughs, or community forums beyond GitHub, and onboarding friction for anyone outside the TypeScript ecosystem is real. Value scores 22 because the flat $200/month Pro plan with unlimited tool calls is a strong structural advantage over usage-metered competitors, and the fully featured free self-hosted option is genuinely rare in this category. Delivery scores 12 because the project is pre-seed with roughly one full-time employee, no published SLA, no compliance certifications, and almost no independent production reviews, which makes it difficult to assess reliability claims with confidence; the trust record is simply too short to score higher.
Pros and cons
What we liked
- Flat $200/month Pro plan with unlimited tool calls, connections, and team members means agent-heavy workloads do not generate surprise bills as call volume grows.
- Full SDK is Apache 2.0 licensed and self-hostable at no cost with every feature included, no gated tier between free and full-featured.
- Native MCP support combined with a REST API means the same integration layer works for AI agents, backend services, and user-facing dashboards without separate adapters.
Where it falls short
- The project is pre-seed with roughly one full-time employee and no published SLA, compliance certifications, or documented enterprise support options, which makes it a hard sell in any procurement process that requires vendor accountability.
- The Hobby plan's 50-connection and 3-team-member caps are tight enough that a small startup with more than a handful of users or developers will hit the ceiling quickly and face a jump straight to $200/month with no intermediate tier.
- Independent user reviews and production case studies are nearly absent, so there is little third-party evidence of reliability, edge-case behavior, or long-term maintenance commitment beyond GitHub star count.
Key features
Corsair pricing
Hobby plan is free at $0/month for up to 3 team members, 50 connections, and 100,000 webhook events with unlimited tool calls. Pro is a flat $200/month for unlimited connections, unlimited webhooks, unlimited team members, and unlimited tool calls. Full self-hosting of the SDK is free under the Apache 2.0 license with no feature gating.
| Plan | Price | Who it is for |
|---|---|---|
| Self-Hosted | Free | Full SDK under Apache 2.0 license, every feature included, no team member or connection caps imposed by Corsair. Developer manages their own infrastructure. |
| Hobby | $0/mo | Up to 3 team members, 50 connections, 100,000 webhook events per month, unlimited tool calls. No credit card required. Uses the hosted Hub. |
| Pro | $200/mo | Unlimited connections, unlimited webhook events, unlimited team members, unlimited tool calls. Flat rate regardless of usage volume. |
Pricing reflects what we saw at time of review (2026-10). Always confirm current pricing on the tool's own site.
Who should use Corsair?
Corsair is a strong fit for a solo developer or small engineering team building an AI agent that needs to act across a user's connected apps: reading emails, updating CRM records, posting to Slack, or pulling calendar data. The flat Pro pricing at $200/month with unlimited tool calls is particularly attractive when an agent makes thousands of API calls per month, since usage-metered alternatives would scale that bill significantly. It also suits SaaS builders who want to offer their customers an in-app integration dashboard without building OAuth infrastructure themselves.
Teams that need documented compliance certifications, vendor-backed SLAs, or a no-code workflow editor should look elsewhere. Orkas, already in this directory, is a better fit for teams that want a local-first, agent-coordination workspace without writing SDK code. For enterprise workflow automation with governance and auditability requirements, TRam Studio is the more appropriate option.
Skip it if: Non-technical teams, compliance-heavy enterprises needing documented SLAs, or anyone who wants a no-code automation layer
Corsair alternatives
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Frequently asked questions
Is Corsair really free to self-host, or are some features locked behind a paid plan?+
The full SDK is Apache 2.0 licensed and free to self-host with no feature gating. Every capability available on the paid hosted plans is also available when you run it on your own infrastructure.
What happens to my users' API credentials?+
Credentials are encrypted and stored in your own database, not on Corsair's servers. The hosted Hub only handles OAuth callback URLs and connect pages; it never holds the tokens themselves.
How does Corsair's pricing hold up as an AI agent makes more API calls?+
Tool calls are unlimited on every plan, including the free Hobby tier. The Pro plan is a flat $200/month regardless of whether an agent makes 1,200 or 120,000 tool calls in a month.
What is the difference between the Hobby plan's 50-connection limit and the Pro plan?+
Hobby caps you at 50 connections (individual user-to-service links), 3 team members, and 100,000 webhook events per month. Pro removes all three caps for a flat $200/month.
Does Corsair work with AI agent frameworks beyond MCP?+
Yes. Corsair is built on MCP but also exposes a REST API, so it works with any agent or backend service that can make HTTP requests, not just MCP-compatible frameworks.
How many integrations does Corsair support, and can I add my own?+
The catalog covers 200+ services including Gmail, Slack, GitHub, HubSpot, Stripe, Linear, and Notion. Because the project is open source under Apache 2.0, you can add custom integrations yourself or contribute them back to the community.
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