// STEP_01 — MARKETING EMAIL

Permission. Then send.

Marketing email starts with permission. Every recipient confirms before you can reach them — enforced at the API. Once they're in, send away. Mailbox providers reward this. So do we.

// STEP_02 — TRANSACTIONAL

Transactional templates just work.

Pick a template, pass your variables, and it's in the inbox. Transactional emails are pre-cleared — no consent workflow required.

// All other emails → permission required. Transactional → ship it.

// STEP_03 — ENGAGEMENT

The Engagement Check

Permission opens the door. Engagement keeps it open. We watch every signal — opens, clicks, complaints, silences — and handle list hygiene so your sender reputation only goes up.

Permission, engagement, and one HTTP call.

All of it lives behind a single endpoint. Pass markdown, HTML, or plain text — we handle rendering, suppression, and delivery on the shared high-reputation pool.

curl -X POST https://api.goodsender.com/v1/emails/send \
  -H "Authorization: Bearer <your-api-key>" \
  -H "Content-Type: application/json" \
  -d '{
    "emails": [
      {
        "from": { "email": "sender@example.com", "name": "Example Sender" },
        "to": [{ "email": "recipient@example.com" }],
        "subject": "Hello from GoodSender",
        "markdown_content": "## Hello from GoodSender\nYour first email is on the way."
      }
    ]
  }'

markdown

Markdown in,
email out

No template language. No rendering pipeline. Pass the model output directly — we handle the conversion to bulletproof email HTML.

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// MCP — COMING SOON(Model Context Protocol)

Run a mailing list from the chat window.

Draft the next issue in your assistant, pick the audience, send. New subscribers get a consent request in the background — their first issue goes out the instant they confirm.

Available in:auto_awesomeClaudechatChatGPTterminalTerminalsmart_toyOpenClaw

// PROVENANCE

Earned, not built.

2009 — our founders built SendGrid to help developers solve the problem of emails landing in spam. The cloud infrastructure shipped. The deliverability problem didn't go away. Deliverability is earned, not built.

2018 — we left the space. Years later, the core problem was still there. Senders were still fighting for the inbox.

2025 — we built Laneful: email engineers, custom IP lanes, and AI agents that monitor traffic health for the largest senders in the world. Tailored involvement that reduces ESP costs and earns top-tier deliverability at scale.

Today — GoodSender is that same playbook, automated. Permission, engagement, and reputation wired into a single API for smaller teams and AI agents.

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