Transmat supports the MicroPub API allowing the simple transfer of content such as posts, photos and check-ins between authoring and collection Apps into your content on transmat.io via your own blog/site.
To use transmat.io to collect content for your blog/site by the MicroPub API:
<link rel="authorization_endpoint" href="https://indieauth.com/auth">
<link rel="token_endpoint" href="https://transmat.io/indieauth/token">
<link rel="micropub" href="https://transmat.io/{username} /micropub">
Replace the text {username}
with your transmat usernameYou can change the access to your content at any time in settings/apps section of the site.