https://api.slack.com/developer-program/join
Developer Signup | Slack
developer signupslack
https://www.statista.com/registration/connect/signup?__sso_cookie_checker=failed
Connect Developer Signup | Statista
Request access to the Connect Developer Platform via Connect. Use Statista data via API directly in your systems, workflows, and applications.
connect developersignup
https://dev.to/emptychairdev/10-free-developer-apis-that-actually-work-no-signup-required-45gl
10 Free Developer APIs That Actually Work (No Signup Required) - DEV Community
developer apisactually work