Hey API

Generates production-ready SDKs, validators, and mocks from OpenAPI specifications

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Hey API generates production-ready TypeScript SDKs, validators, and mock servers directly from OpenAPI specifications through a plugin system with 20+ plugins. It's used by teams at companies like Vercel and PayPal to keep API client code automatically in sync with their API contracts.

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Full match profile

Behind the summary, Matchbox keeps a richer profile of Hey API - the signals our matcher actually reads to decide when to surface it. It stays private; claim the listing to see and control it.

Problem & pain-point mapping
Who we surface it to (audience fit)
What it's a strong alternative to
Trust & credibility signals

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