Please use connection strings instead.
This is a Heroku buildpack for adding Planetscale CLI into your project.
Add this buildpack to your Heroku project
heroku buildpacks:add https://github.com/planetscale/heroku-buildpack-planetscale
The command will install pscale CLI into your Heroku application.
This buildpack also supports installing a specific cli version by setting the PLANETSCALE_CLI_VERSION environment variable.
heroku config:set PLANETSCALE_CLI_VERSION=0.45.0
For more information about buildpacks, see these Heroku Dev Center articles