# LANGR API

> All-in-one developer API: transactional email, SMS OTP, auth, payments, SEO, AI content, i18n translation. 120+ locales, GDPR-compliant, Europe-hosted.

## Docs
- [API Reference](https://api.langr.org/docs): 47 REST endpoints across 11 services
- [OpenAPI Spec](https://api.langr.org/openapi.json): OpenAPI 3.1 machine-readable spec
- [Node.js SDK](https://www.npmjs.com/package/@langr/sdk): npm install @langr/sdk

## Services
- [Mail API](https://api.langr.org/docs#tag/Mail): Send self-hosted transactional email (Stalwart SMTP, DKIM-signed, Europe-hosted).
- [SMS API](https://api.langr.org/docs#tag/SMS): Send SMS + OTP verification. Europe + global.
- [Auth API](https://api.langr.org/docs#tag/Auth): OTP, magic links, Google OAuth. Sessions.
- [Payment API](https://api.langr.org/docs#tag/Payment): Stripe checkout, billing portal.
- [SEO API](https://api.langr.org/docs#tag/SEO): Domain audits, keyword tracking, competitors.
- [Content API](https://api.langr.org/docs#tag/Content): AI content generation.
- [i18n API](https://api.langr.org/docs#tag/i18n): Translate to 120+ locales with RTL.

## Pricing
- Free: 100 requests/day, $0/month
- Pro: 10,000 requests/day, $49/month
- Enterprise: Unlimited, custom pricing