Resend MCP

Fixes inbox handling so large attachments are accepted and corrects the inbox tool details.

Inbox tools now match the stable Inboxes API, and inbox agent tone preset descriptions are fixed.

The inboxes tool now describes reply-all when operating on sent emails, along with cleanup of inbox test names.

New inboxes tools are available, and create-webhook and update-webhook now accept inbox events.

Security fix restricts local file reads in the send-email and create-contact-import tools.

Webhook support now includes topic events and contact.topics.updated events.

Added a get-usage tool to the Resend MCP server.

Automation preview URLs now append /editor to point at the editor path.

The broadcasts API gains a duplicate-broadcast tool, letting an existing broadcast be copied.

Webhook creation now points at get-webhook to retrieve the signing secret.

Adds a rotate-webhook-signing-secret tool for rotating webhook signing secrets via MCP.

Optional tool fields now pass through explicit empty strings instead of dropping them.

Added a replay-webhook-event tool for replaying webhook events.

Adds tools for inspecting webhook events to the MCP server.

Added an update-segment tool for segments, and hoisted tool schemas to module scope to cut memory growth.

Added an email-metrics tool plus list-broadcast-clicked-links and list-broadcast-recipients tools. Aligned list-broadcast-recipients with the remote MCP twin.

Adds an update-api-key tool for managing API keys and a share-email tool for sharing emails.

New tools let you cancel a broadcast and duplicate an automation.

Added a cancel-broadcast tool for managing broadcasts. Includes a chore updating test fixtures to use the API timestamp format.

Adds suppression list tools and support for the MCP spec version 2026-07-28 alongside legacy clients. Also fixes empty idempotency key rejection and preserves empty template/broadcast text.