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Tumblr connects over OAuth 2.0. After authorising, Postiz asks which of your blogs to post to, so one Tumblr account can become several channels.
1

Register an application

Go to tumblr.com/oauth/apps and click Register application.Fill in the application name, description and your website. Tumblr requires all of them.
2

Set the callback URL

Your Tumblr redirect URI:
  • Production: https://your-postiz-domain.com/integrations/social/tumblr
  • Local development: http://localhost:4200/integrations/social/tumblr
  • Docker: http://localhost:4007/integrations/social/tumblr
3

Copy the keys

Tumblr shows an OAuth Consumer Key and, behind Show secret key, an OAuth Consumer Secret. Add both to your environment:
4

Restart and connect

In Postiz, click Add Channel, pick Tumblr, authorise, then choose the blog you want this channel to post to.

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Scopes

Postiz requests write and offline_access. The second one is what lets Postiz refresh its access token, so without it the channel stops working after the first token expires.

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Post settings

Tumblr posts accept a title, a link URL, a source URL and tags. Media limits are up to 30 images or a single video. See Posting rules by platform.