Start sending

Send. Receive. Market.

The complete email platform for your team and its agents — one API, one dashboard, every email.

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Free sandbox to integrate · Production from $3/month

Halftone illustration: a fleet of winged airmail envelopes in flight — a large lead envelope-plane with a blue wax seal banks in the foreground while a V-formation recedes on dotted routes; at the bottom edge routes descend to a row of letterboxes and one returns up
#01 — Send

Your first email in five lines.

A clean REST API, drop-in SMTP, and typed SDKs for Node and Python. Wire it up this afternoon.

curl -X POST https://api.drin.run/v1/emails \
  -H "Authorization: Bearer drin_k_…" \
  -d '{
    "from":    "you@yourapp.com",
    "to":      "sarah@gmail.com",
    "subject": "Your sign-in code",
    "html":    "<b>482910</b>"
  }'

# → 200 · id: em_8f2…
DRIN POSTAGE · SERIES 01 — SENDSHEET OF 3
01.1Templates

Write once, send forever — versioned content with merge fields, sent by id from the API, the dashboard, or an agent.

01.2Webhooks

Signed delivery, bounce, and complaint events to your server — every message accounted for.

01.3Batch & schedule

Now or later, one or many. Send, schedule, batch, attach — one endpoint either way.

Explore Send →
#02 — Receive

Give your product an inbox.

Real addresses on your domain. Replies land as structured JSON — threads, attachments, webhooks — ready for your code or your agent.

Explore Receive →
{
  "from": "sarah@gmail.com",
  "subject": "Re: Your sign-in code",
  "text": "this code isn't working?",
  "routed_to": "agent:support" // 240ms
}
DRIN POSTAGE · SERIES 02 — RECEIVESHEET OF 3
02.1Inboxes

Addresses on your domain — create real inboxes with one call. support@, agent@, anything.

02.2Threads & replies

Every exchange threaded with full history. Reply from the API, the dashboard, or an agent.

02.3Webhooks

The moment mail arrives, a POST to your endpoint with the parsed message — ready to act on.

#03 — Marketing

Campaigns and automations, next to the email you already send.

Import contacts, segment by what people do, send campaigns, and let automations run welcome-to-winback. Topics and preference pages keep every send compliant by default.

Explore Marketing →
Halftone illustration: a person at a desk seals one letter while a manifold of pneumatic tubes behind them fans out to deliver it everywhere
DRIN POSTAGE · SERIES 03 — MARKETINGSHEET OF 3
03.1Campaigns

One send to exactly the right people — on the domain reputation you already earned.

  • Compose with templates or raw HTML
  • Pick a segment, schedule or send now
  • Per-campaign delivery and engagement metrics
  • Rides your warmed domain reputation
03.2Automations

Welcome to winback — sequences that keep running while you ship.

  • Triggered by signups, events, or inbound replies
  • Multi-step sequences with delays and branches
  • Stops when someone converts or unsubscribes
  • Runs around the clock, no dashboard open
03.3Topics

Consent, modelled properly — readers leave a list, not your product.

  • Per-topic subscription state on every contact
  • One-click unsubscribe headers on every send
  • A hosted preference page for readers
  • Compliance by default, not configuration
#04 — Agents

Everything above, your agent can run.

54 tools over MCP, a full CLI, and skills for Claude Code, Cursor, and Codex. Your agent drafts the campaign — you launch it by replying APPROVE to an email.

send_emailget_threadreply_emaillist_inboxessimulate_inbound+ 49 more
Explore Agents →
{
  "mcpServers": {
    "drin": {
      "command": "npx",
      "args": ["-y", "@drin00/mcp"],
      "env": { "DRIN_API_KEY": "drin_k_…" }
    }
  }
}

# 54 tools: send, read, reply, domains, metrics…
APIYOUYOUR APPDRIN APIMXJSONTHE REPLYYOUR MXPARSED{ }MCPDRAFTYOUR AGENTMCPTHE DRAFTAPPROVEYOUR INBOXYOU REPLYIT SHIPS
Dimensional pixel art: a human hand and a robot hand reach toward each other, a sealed envelope passing between their fingertips
Agent InboxIts own addressMCP server54 tools
ClaudeCursorCodexLovableReplit
#05 — Deliverability

Authentication, warmup, reputation — handled.

A unique DKIM key per domain, one-click DNS setup, gradual warmup, and a trust engine that protects your reputation before problems reach the big inboxes.

How deliverability works →
Pixel art: a winged envelope flies a dotted route past three towers flying DKIM, SPF and DMARC flags, descending to an open mailbox; a stray route is stopped at a barrier
DRIN POSTAGE · SERIES 05 — DELIVERABILITYSHEET OF 3
05.1One-click setup

DKIM, SPF, and DMARC verified through Domain Connect in minutes — no DNS spelunking.

05.2Warmup & trust

Volume ramps as your reputation earns it — the trust engine watches every send.

05.3Suppressions

Bounces, complaints, and unsubscribes suppressed automatically — before they hurt you.