Email marketing for Claude Code, Cowork and Chat.

nitrosend is headless email marketing from inside Claude. Run email flows, newsletters and transactional emails from a prompt. On-brand email design, promotable, and editable in the nitrosend dashboard.

Start by connecting Claude to nitrosend

Claude Code
$ claude mcp add --transport http nitrosend https://api.nitrosend.com/mcp

Then prompt:
"Use nitrosend to set up a welcome email series for my SaaS app"
Add nitrosend as a Custom Connector
In the Claude Desktop app go to Settings → Connections → Customize → Add Connectors + → Add Custom Connector, then enter:
Name nitrosend
Remote MCP URL https://api.nitrosend.com/mcp
Then click Connect and sign in.

Then prompt:
"Use nitrosend to draft a launch email for our new feature and show me the preview"
Try these prompts

What to say once it's installed.

nitrosend exposes 23 tools. Claude figures out which to call. You just describe what you want.

Campaign

"Launch Black Friday"

Use nitrosend to draft a 3-email Black Friday sequence for our Pro plan, send a test to me, schedule the first for Friday 9am local time.

Flow

"Build welcome onboarding"

Use nitrosend to build a 5-step welcome flow: day 0 welcome, day 1 getting started, day 3 case study, day 7 ask for feedback, day 14 upsell.

Segment

"Who is disengaging?"

Use nitrosend to find contacts who opened in the last 90 days but clicked zero campaigns. Save as a re-engagement segment.

Analysis

"Why did opens drop?"

Use nitrosend to compare last month's campaign open rates to this month's. Identify which subject lines and send times underperformed and why.

Transactional

"Send a receipt"

Use nitrosend to send a branded receipt to [email protected] with line items [{...}] and total $129.

Ops

"How's deliverability?"

Use nitrosend to check my sending reputation, bounce rate, and any domains that need attention. Fix what you can, flag what you can't.

Email, from inside Claude.

$ claude mcp add --transport http nitrosend https://api.nitrosend.com/mcp