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API & Integration

Connect Flashmail
to the tools you already use.

Manage lists, subscribers and campaigns from your own system with a REST API. Sync website signups straight into your lists, and send transactional email from your app.

Start for free See an example

REST API · JSON · Lists · Subscribers · Campaigns · Webhooks

REST and JSON

Simple requests with predictable JSON responses.

Lists, subscribers and campaigns

Endpoints for the core of your email marketing.

Token authentication

Use the API token from your account.

Websites

Website signups,
straight into your lists.

Add your domain under Websites and install a small JavaScript snippet. Form submissions flow in and sync to your lists, so new contacts are ready for your next campaign.

Add your domainRegister each website you want to connect.
One JavaScript snippetInstall connect.js on your site.
Synced to your listsVisitors and form submissions flow into your lists.

Transactional

Send app email
through an API too.

For OTP codes, password resets and notifications, the Transactional Email API sends a pre-made template with your {{variables}}. It uses its own key and a priority lane separate from campaigns.

OTP and password resetsSend the emails your app depends on.
Templates with {{variables}}Your app sends only the values that change.
Separate X-API-KeyKept apart from your account API token.
An API request that sends a one-time password email from a saved template, and the email the customer receives.

What you can do

Your audience and campaigns, from code.

Endpoints for the things you work with every day.

Lists

Create and manage your mailing lists.

Subscribers

List, add, update and tag subscribers.

Campaigns

Work with your campaigns from your own system.

Webhooks and notifications

Notification and webhook endpoints are part of the API.

Feedback loop

An endpoint for bounce and complaint feedback.

Website integration

Sync signup forms on your own site to your lists.

Getting started

Make your first API call.

All you need is an account and its API token.

  1. 1

    Get your API token

    Find it under Account → API in the portal.

  2. 2

    Send a request

    Pass the token as a Bearer header or an api_token parameter.

  3. 3

    Read the JSON

    Each response includes a status, a message and the data.

Common questions.

Where do I find my API token?

In the portal, go to Account → API. Send the token as a Bearer header or as the api_token parameter.

What format does the API use?

It is a REST API with JSON responses, such as {"status":1,"message":"Success","data":…}. The base URL is https://api.flashmail.id/api/v1.

Is the transactional email API the same as the REST API?

No. Transactional email has its own endpoint and its own X-API-Key, separate from the account API token. Its availability depends on your plan.

Build Flashmail
into your workflow.

Create a free account and get your API token from the Account page.

Start free Contact us