We are not adding Substack or Medium, because neither gives us a supported way to publish. Medium archived its API and has said it will not issue new integration tokens or allow new integrations, so there is no path for us to even connect your account. Substack's official Developer API launched in 2026 with a single profile-lookup endpoint (public creator data from a linked LinkedIn handle) and no endpoint for creating, scheduling or publishing a post or a Note; the third-party "Substack APIs" you may find drive undocumented internal endpoints, which we will not build a paid integration on.
The nearest thing that works: publish on Substack or Medium, then use Zernio to schedule the link out to LinkedIn, X, Threads, Facebook and the rest. If either platform ships a public write API, we will revisit this.
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Miquel Palet López
Aug 26
We are not adding Substack or Medium, because neither gives us a supported way to publish. Medium archived its API and has said it will not issue new integration tokens or allow new integrations, so there is no path for us to even connect your account. Substack's official Developer API launched in 2026 with a single profile-lookup endpoint (public creator data from a linked LinkedIn handle) and no endpoint for creating, scheduling or publishing a post or a Note; the third-party "Substack APIs" you may find drive undocumented internal endpoints, which we will not build a paid integration on.
The nearest thing that works: publish on Substack or Medium, then use Zernio to schedule the link out to LinkedIn, X, Threads, Facebook and the rest. If either platform ships a public write API, we will revisit this.