Corsair
An open-source product-integration platform that gives agents, backend services and customer-facing dashboards one consistent REST API and syntax for connecting to third-party apps.
Corsair is an integration platform for connecting users to their third-party apps. Unlike integration tools built only for MCP, it exposes a REST API so the same integration layer serves an agent working across multiple tools, a backend service, or a multi-tenant dashboard offered to a company's own customers.
It gives every third-party integration the same syntax and maintains the adapters behind it, so a team connects once instead of writing separate glue code for each API. It is open source and can be self-hosted, or run through a hosted service that manages OAuth refresh and webhooks.