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This guide walks you through creating an EffiLink account, obtaining an API key, setting up a verified sender, and making your first API call to send a transactional email. You’ll be sending in under 5 minutes.
1

Create an account

Sign up at app.effilink.co. Your account is free to create — no credit card required for trial access.
2

Get your API key

  1. Log in to your EffiLink account.
  2. Click Settings in the top-right corner.
  3. Navigate to API Configuration → API Keys.
  4. Click Create API Key in the top-right.
  5. Save the generated key immediately — the second half of the key is only shown once.
Store your API key in a secure secrets manager. Never commit it to source control or expose it in client-side code.
3

Add a verified sender

Before you can send email, you must register the sending address or domain:
  1. Go to Settings → Verified Senders.
  2. Add your sending email address (e.g. noreply@yourdomain.com).
  3. Complete domain verification by adding the DNS records EffiLink provides (SPF, DKIM, DMARC).
You can start testing with sandbox mode while domain verification is in progress. See Sandbox Mode.
4

Send your first email

With your API key and verified sender ready, make this API call:
A successful response looks like:

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What’s next?

Transactional Email

Explore all parameters for sending single and batch transactional emails.

Campaign Email

Learn how to send marketing campaigns to contact lists.

Webhooks

Receive real-time delivery and engagement events.

API Reference

Full endpoint reference documentation.