Nitrosend

AI-native email platform that combines transactional and marketing email in one stack, controlled entirely through AI assistants via MCP. No traditional dashboard required — build sequences, campaigns, and automations by prompting.

Capabilities

Authentication

• Type: API Key
• MCP Setup: Add Nitrosend MCP server to your Claude Code / AI assistant config
• BYO Infrastructure: Optionally bring your own SendGrid, Postmark, SES, or Resend keys
• Get access: Sign up at nitrosend.com — free tier includes 8K emails initially, then 500/month

Pricing

Unlimited contacts on all plans — pay per email sent, not per subscriber.

What Makes It Different

• AI-first: Designed to be controlled by Claude, ChatGPT, Codex, Cursor, Gemini, Windsurf — not a human clicking through a dashboard
• Unified transactional + marketing: Single platform for both, on separate infrastructure
• Automatic optimization: Continuously tests subject lines, send times, and content based on engagement
• Auto-configured deliverability: DKIM, SPF, DMARC, and dedicated IP warmup handled automatically
• Migration-friendly: Import from Mailchimp, Klaviyo, ActiveCampaign, HubSpot

Common Agent Operations (via MCP)

Create an email sequence

"Create a 5-email onboarding sequence for new SaaS trial users.
Email 1: Welcome + what to do first (send immediately)
Email 2: Key feature highlight (day 2)
Email 3: Use case / success story (day 4)
Email 4: Check-in + support offer (day 7)
Email 5: Upgrade prompt (day 12)"

Nitrosend builds the sequence, timing, and sends — no manual setup in a dashboard.

Send a transactional email

"Send a password reset email to [email protected] with a reset link valid for 1 hour."

Create a campaign

"Create a re-engagement campaign for subscribers who haven't opened in 90 days.
Subject line variants: [A] 'We miss you', [B] 'Still interested in [topic]?'
Test both, send winner to remaining list after 4 hours."

Check sequence performance

"Show me open rates, click rates, and unsubscribes for the onboarding sequence."

Import a list

"Import this CSV of 2,000 subscribers from our Mailchimp export."

Deliverability Setup

Nitrosend handles this automatically on signup:

• DKIM signing
• SPF record configuration
• DMARC policy
• Dedicated IP provisioning (Pro+)
• IP warmup schedule

For BYO plan users: bring your own SendGrid, Postmark, SES, or Resend account and Nitrosend routes through your infrastructure.

When to Use

• Building email sequences via AI without touching a dashboard
• Teams already using Claude Code or other AI coding tools as their primary workflow
• Combining transactional (password resets, receipts) and marketing (nurture, campaigns) in one place
• Rapid sequence prototyping — describe the sequence, get it built
• Migrating from Mailchimp/Klaviyo and wanting AI control going forward

When to Use Something Else

• Customer.io — if you need complex event-based branching logic and behavioral triggers
• Klaviyo — if you're in e-commerce and need deep Shopify integration
• Resend — if you need transactional-only and prefer a pure API/code approach
• Kit — if you're a creator or newsletter-first

Relevant Skills

• email-sequence
• onboarding-cro
• churn-prevention
• lead-magnets