PDF, docx, xlsx, pptx etc. are returned as EmbeddedResource with
BlobResourceContents (base64 + mimeType). claude.ai processes these
client-side, same as Google Drive/Dropbox MCP connectors.
Fallback chain: text → image → embedded resource (binary).
MIME type guessed from extension when server returns octet-stream.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Files:
- read_file returns images inline (jpg/png/gif/webp up to 10MB)
- Text files returned as text, binary files as metadata only
Contacts:
- get_contact includes contact photo as inline image if available
- New tool: set_contact_photo (base64 jpeg/png → VCard PHOTO)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Self-hosted MCP servers with OAuth client_credentials auth.
Each server connects to a different backend:
- Mail: reads Maildir IMAP backups
- Calendar/Tasks: CalDAV against Radicale
- Contacts: CardDAV against Radicale
- Files: WebDAV against oCIS
- Notes: Joplin REST API
Credentials externalized to config.json (not in repo).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Stefan Lohmaier