How to Connect Resend to Claude (and What It Can't Do)
Resend is one of the tools that made this easy on their end. The company behind the developer-favorite email API maintains its own MCP server — resend/mcp-send-email, hosted at mcp.resend.com/mcp per Resend’s docs — so Claude can talk to your Resend account through first-party code. What Resend hasn’t done (as of mid-2026) is ship a tile in Anthropic’s Connectors Directory, which means the connection still goes in as a custom connector on a paid Claude plan. And the ceiling every Claude connector shares applies here too: it works when you’re in a chat, and at no other time.
Below: what the official server actually covers, the two-minute hosted setup, the analytics hole worth knowing about before you rely on it, and the trigger-based route for everything the chat can’t do.
What the official server covers
Point Claude at Resend’s server and a surprisingly wide slice of the product opens up in plain language:
- Sending — single transactional emails, batch sends, and scheduled sends, attachments included.
- Looking things up — list recent sends and pull up individual messages when you need to confirm something went out.
- Account objects — templates, contacts, broadcasts, audiences, domains, webhooks, and API logs are all reachable as tools.
Try prompts like “Send the invoice email template to billing@northwindtraders.com with this PDF attached,” “Schedule the beta-invite broadcast for Monday 9am,” or “Did the password-reset email to Jane at Vercel go out in the last hour?”
The notable gap: there is no analytics tool. The server sends and organizes; it does not report. Ask “summarize this week’s bounce rate” and Claude has nothing to call — delivery metrics live behind Resend’s webhooks and API, which means custom code, not a chat prompt.
Connecting it takes about two minutes
- In Claude, open Settings → Connectors and add a custom connector with the URL
https://mcp.resend.com/mcp— nothing to install or host. - Complete the OAuth login to your Resend account and review the access you’re approving. This connector can send from your verified domains, so the approval screen deserves an actual read.
- Prefer to keep credentials local? Run the open-source server yourself with a Resend API key instead.
- Start a chat and ask for a send or a lookup — Claude calls the server from there.
One caution specific to this ecosystem: in September 2025 a malicious npm package impersonating a Resend MCP server made the rounds. Install only from Resend’s own GitHub org or use the hosted endpoint.
Where the chat model runs out
Everything above happens inside a conversation you opened. That single fact draws the boundary:
- A hard bounce at 2am posts to your webhook endpoint — and nothing happens in Claude, because nobody’s in a chat to see it.
- A bounce-rate spike during a product-launch broadcast reaches you when you next think to ask, not when it starts.
- The “resend failed receipts every morning” routine you’re imagining isn’t a routine at all — it’s you, every morning, typing the same prompt.
Resend’s own architecture assumes you’ll wire events to code. Claude’s connector can’t be that code: it holds no standing state, subscribes to no webhooks, and executes nothing between conversations.
The trigger side: Carly
Carly picks up exactly where the chat stops — it’s an AI executive assistant whose workflows start from events instead of prompts:
- A hard bounce fires a workflow that retries the send, logs it, and pings you in Slack if it fails twice.
- Delivery metrics get pulled on a schedule and arrive as a morning digest — with the report sent, not drafted, from Gmail or Outlook.
- The whole thing gets built by describing it: tell Carly “watch my Resend bounce rate and alert me over 2%,” answer its questions, and the workflow exists — no MCP server, no webhook plumbing on your side.
AI agents start at $35/month, and steps in a workflow that don’t use AI run free and unlimited. Carly connects to 200+ tools across 40+ categories — see integrations and the Resend integration page.
Claude’s Resend MCP vs Carly
| Claude (Resend MCP) | Carly | |
|---|---|---|
| Send transactional, batch & scheduled email | Yes (in chat) | Yes (automatically) |
| Attachments on sends | Yes | Yes |
| Bounce-rate & delivery metrics | No built-in tool | Yes |
| Reacts to a webhook event | No | Yes |
| Morning sending digest, unprompted | No | Yes |
| Works while laptop is closed | No | Yes (cloud) |
| Setup | Custom connector, paid plan | Describe it in plain English |
| Pricing | Paid plan + MCP setup | AI agents from $35/mo |
In short: the official server gives Claude real hands on your Resend account for the moments you’re present, and no presence anywhere else.
Frequently Asked Questions
Does Claude integrate with Resend?
Yes, through Resend’s own official MCP server, hosted at mcp.resend.com/mcp. It’s not a one-click directory app as of mid-2026 — you add it as a custom connector, which requires a paid Claude plan. Once connected, Claude can send and manage email inside a chat; delivery analytics aren’t included.
Can Claude alert me automatically when an email bounces?
No. Bounces surface through Resend’s webhooks, and Claude’s connector can’t subscribe to them — it only acts inside a conversation you start. For automatic bounce alerts and retries, you need a trigger-based agent like Carly.
How do I connect Claude to Resend?
Add https://mcp.resend.com/mcp as a custom connector under Settings → Connectors and approve the OAuth login. Self-hosting the open-source server with an API key works too. Either way, custom connectors require a paid Claude plan.
Is there a free Claude Resend connector?
Resend’s server costs nothing, but the custom-connector slot it plugs into effectively requires a paid Claude plan. There’s no directory tile to flip on for free.
What if I want delivery watched without me in the chat?
That’s the line Claude’s connector can’t cross — no standing monitoring, no event reactions. Carly runs in the cloud 24/7, checking delivery, resending failures, and sending alerts as events happen. AI agents start at $35/month.
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