Freemium
Cal.com
Open SourceScheduling & Booking · API Tools
Open-source scheduling infrastructure — Calendly alternative with booking links, teams and an API you can self-host.
schedulingbookingopen-sourcecalendar
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Scheduling & Booking · API Tools
Open-source scheduling infrastructure — Calendly alternative with booking links, teams and an API you can self-host.
API Clients · API Tools
Lightweight, open-source API development ecosystem in the browser.
API Mocking · API Tools
HTTP request and response service for testing clients.
Authentication · API Tools
Open-source auth infrastructure with a beautiful admin console — OIDC/OAuth, SSO and user management, self-hostable.
Payments · API Tools
Open-source payments and monetization for developers — checkouts, subscriptions and license keys, MoR model.
Tunneling & Debugging · API Tools
Open-source HTTP interception: modify requests, mock, and debug in browser.
API Documentation · API Tools
OpenAPI tooling suite by SmartBear: UI, editor, codegen and more.
API Mocking · API Tools
Instantly inspect and test incoming webhooks with a temporary URL.
API Mocking · API Tools
Flexible API mocking and service virtualization for HTTP.