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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

Integration Available Notes
API ✓ REST API available
MCP ✓ Full MCP support — primary integration method
CLI - Not available
SDK - Use MCP or API directly

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

Plan Cost Volume
Free $0 8K initially, then 500/mo
Hobby $20/mo 25,000/mo
Pro $100/mo 150,000/mo
Scale $300/mo 500,000/mo
BYO $60/mo Unlimited (your infrastructure)

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 user@example.com 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

  • emails
  • onboarding
  • churn-prevention
  • lead-magnets