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Built Varen because I was tired of learning about API breaking changes from production errors. A lot of API changes are easy to miss and buried in changelogs, release notes, or quiet docs updates. Varen monitors those sources automatically, diffs OpenAPI specs when available, and highlights the changes that actually matter. It currently covers 109 APIs including Stripe, OpenAI, GitHub, Twilio...

VarenAPI change monitoring to know before your integration breaks
