Checks API support added for Marketplace integration providers
By Steven Van ·
Testing providers building native Vercel Marketplace integrations can run reliability, performance and Web Vitals checks after every deployment.
Providers building native integrations for the Vercel Marketplace can now use the Checks API, according to a Vercel announcement dated 30 April 2025. It lets a provider define and run custom tests and assertions after every deployment, with results shown in the Vercel dashboard.
Vercel lists three kinds of check a testing provider could implement:
- Reliability tests, such as API availability and runtime errors
- Performance tests, such as response time thresholds and load simulation
- Web Vitals, such as layout shift
For developers using those integrations, the aim is to catch real-world issues earlier in their workflow. Vercel also gives providers four best practices:
- Offer minimal or no-configuration solutions, so developers can easily run checks
- Provide a guided onboarding experience from installation to first results
- Display clear, actionable outcomes directly in the Vercel dashboard
- Document ways to extend or customize checks for advanced users
Details are in the Checks API documentation.
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