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Legal
Privacy Policy
Last updated: August 13, 2026
Privacy at a Glance
We don’t store request bodies in our database
We don't sell your data to third parties
Minimal data collection, maximum security
1. Introduction
Langbly API ("we", "our", or "us") is committed to protecting your privacy. This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our translation API service.
2. Information We Collect
2.1 Account Information
When you create an account, we collect:
Email address
Name (optional)
Company name (optional)
Billing information (processed securely by Lemon Squeezy)
2.2 Usage Data
We collect aggregated usage statistics including:
Number of API requests
Character counts (for billing)
Language pairs used
Response times and error rates
2.3 What We Don't Collect
We do not store request bodies in our database. When caching is enabled, translation results may be stored temporarily to speed up repeated requests.
2.4 MCP and OAuth Connections
If you connect Langbly to an AI client through the Model Context Protocol (MCP), we process your Langbly user identifier, email and profile information needed for OAuth sign-in, the OAuth client identifier, consent and token lifecycle information, and operational usage metadata. Translation text and tool results pass through the services needed to perform the requested tool call, but translation request bodies are not stored in our database.
The AI client or host may separately retain prompts, chat history, approvals, and tool results under its own privacy policy. Review the host's policy before sending personal, confidential, or regulated content.
3. How We Use Your Information
We use the information we collect to:
Provide and maintain our service
Process payments and send billing information
Send service-related communications
Monitor and improve service performance
Detect and prevent fraud or abuse
4. Data Security
We implement industry-standard security measures including:
TLS encryption for all API traffic
Cryptographic API-key and OAuth-token verification
Access controls for operational systems
Resource-bound MCP access tokens and private service bindings
5. Data Retention
We retain account information for as long as your account is active or as needed to provide the Service. You may request deletion of your account and associated data at any time.
6. Third-Party Services
We use the following third-party services:
Lemon Squeezy - Payment and subscription processing
Unkey - API key management
AI Translation Provider - Translation model inference
Supabase - User authentication and OAuth 2.1 authorization
Cloudflare - Edge hosting, private service bindings, security, and operational delivery
7. Your Rights (GDPR)
If you are in the European Economic Area, you have the right to:
Access your personal data
Correct inaccurate data
Request deletion of your data
Object to processing of your data
Data portability
8. Contact Us
If you have questions about this Privacy Policy, please contact us at:
[email protected]