Fast triage, a readable thread view, and a dock that stays out of the way until you need it.
macOS · local-first · invite gate
Tendryls
One calm desktop for every mailbox you actually use — mail, plan, and calendar on your machine, with a single MCP endpoint for the AI tools you already trust.
Apple silicon macOS only for v1. Downloads are manually approved before launch; this is a marketing gate, not DRM.
Many mailboxes, one workflow
Switch identities without juggling apps. Search, triage, and reply across the accounts that matter — then park the rest until you mean it.
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All-mailboxes view
Aggregate unread across accounts without merging them into one blob of someone else’s mail.
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Per-mailbox rules
Block and accept verdicts stay with the mailbox that made them — history stays identity-wide.
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Resurface, don’t bury
Bring mail back when the moment is right. The product word is Resurface; the habit is intentional.
Mail, Plan, Calendar
Three surfaces that share the same local store — so a thread, a task, and a meeting stay in one rhythm instead of three tabs.
Plan
Turn mail into work you can schedule, park, and finish without losing the conversation.
Calendar
Keep the week beside the inbox so replies and commitments share the same clock. A dedicated calendar screenshot is not published on this page yet; the surface ships in the macOS app.
Calendar · in the macOS app
AI connections, on your terms
Tendryls exposes a local MCP endpoint so your AI client can search and act across the mailboxes you connected — without shipping your tokens to a third-party mail proxy.
- Designed for local MCP clients such as Claude Desktop, Claude Code, Codex CLI, and similar tools that speak MCP.
- claude.ai connector path: OAuth 2.1 live verification is still open, so we do not claim a verified hosted Claude.ai connection yet.
- One endpoint, many mailboxes — ask once; Tendryls routes to the right account.
Local data, deliberate privacy
Mail, tokens, and sync state live under your account on the Mac. The launch waitlist only stores the email you submit, plus minimal approval audit fields — never a mailbox password, and never a raw IP.
- OAuth tokens stay on disk with owner-only permissions on your machine.
- Device lenses stay device-local; the hub never sees lens definitions.
- Optional open tracking stores only opaque send ids and aggregate counts — no raw IP or full user-agent.
Provider support
Honest scope for the first public build.
Gmail
Primary path, used daily on live mailboxes.
IMAP / SMTP
Generic providers for mailboxes that speak the classics.
Microsoft 365 / Outlook
Graph integration is implemented in the app, but has not yet been live-verified against a customer Microsoft mailbox. We will not over-claim it until that proof lands.
macOS requirements
v1 ships as a notarized Apple silicon app only.
- macOS on Apple silicon (arm64)
- Bundle ID
com.tendryls.mail - Installed path
/Applications/Tendryls.app - Internet access for provider OAuth and sync
Request download access
Leave an email. Before public launch we approve requests manually and send a short-lived download link. After launch, the same form can unlock the macOS build immediately — without changing the address you use today.