NoticeAPI documentation

Send transactional messages, audience updates, SMTP relay, and inbound email workflows from one NoticeAPI workspace. Every send is tracked per recipient, bounces and complaints suppress automatically, and the deliverability autopilot watches risky sender patterns before they compound.

curl -X POST https://www.noticeapi.com/api/v1/email/send \
  -H "Authorization: Bearer ntc_xxxxxxxxxxxxxxxxxxxx" \
  -H "Content-Type: application/json" \
  -d '{
    "from": "Acme <[email protected]>",
    "to": "[email protected]",
    "subject": "Your receipt",
    "html": "<p>Thanks for your purchase!</p>"
  }'

How it fits together

API keys (ntc_xxxxxxxxxxxxxxxxxxxx) authenticate every call. Domains verify via DNS so you can send from your own addresses. Emails return an id you can poll for per-recipient delivery events, or subscribe to webhooks and get pushed. Receiving domains turn inbound messages into signed webhooks and retrieval APIs. Suppressions keep bad addresses from being retried. Audiences and broadcasts handle product updates with contact state, scheduling, stats, and shared plan usage.

Base URL & auth

All endpoints live under https://www.noticeapi.com/api/v1 and take Authorization: Bearer ntc_xxxxxxxxxxxxxxxxxxxx. Create keys in the API keys guide. Responses are JSON; errors carry a stable code field (see Errors & limits). For an endpoint inventory, scopes, and retry conventions, read the REST API reference.

Start here

The best path is: quickstart goes from zero to simulator-delivered and bounced events in about five minutes with no domain setup required.

Integrations

Prefer a stack-specific guide? Use the integrations directory for Next.js, Node.js, and Nodemailer. Agents can start with scoped keys and the MCP-ready tool contracts.

Product guides

Evaluating the product before you integrate? Start with the email API, transactional email API, or email sandbox simulator guide. For feature-specific evaluation, see deliverability autopilot, multiple sending domains, templates, automations, and email receiving, plus audience management.