API

Integrate email into your product with a developer-friendly API.

Our RESTful API lets you manage subscribers, trigger campaigns, and pull analytics programmatically. Build email into your product workflow with clean endpoints, clear documentation, and predictable rate limits.

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Built for Developers

A clean, RESTful API with consistent conventions, meaningful error messages, and comprehensive documentation. Authenticate with API tokens and start integrating in minutes, not days.

RESTful endpoints with JSON responses
Token-based authentication
Comprehensive API documentation with examples
Webhook support for real-time event notifications

app.straighttoinbox.com/settings/api

API

Secret key

sk_live_••••••••••••••••••3f9a Active

POST /v1/campaigns

Request

$ curl -X POST https://api.straighttoinbox.com/v1/campaigns \
  -H "Authorization: Bearer sk_live_…" \
  -H "Content-Type: application/json" \
  -d '{ "subject": "Launch day", "list_id": "lst_8k2" }'

202 Accepted Response

{
  "id": "cmp_9Xa72bQ",
  "status": "queued",
  "recipients": 12840,
  "created_at": "2026-06-17T09:41:02Z"
}

Automate Your Workflow

Sync subscribers from your app, trigger transactional emails on user actions, or pull campaign stats into your own dashboards. The API gives you full programmatic control over every feature in the platform.

Automate Your Workflow

Manage subscribers and lists programmatically

Send transactional emails with per-message tracking

Trigger campaign and automation sends from your code

Pull analytics data into custom dashboards

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Subscriber Management

Organize your audience, grow your list effortlessly.

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Automations

Put your email marketing on autopilot.

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Analytics

Measure what matters, improve what counts.

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Start using API today — it's free

No credit card required. Get started in minutes.

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