# Management Store Etsy Public API > REST API for Etsy shop and order data, including manual fulfillment updates. Authenticate with Bearer API keys (mse_ prefix). ## Documentation - [Interactive API explorer](https://etsy.lntech-ecommerce.com/developers): Try endpoints in the browser - [Full API reference (Markdown)](https://etsy.lntech-ecommerce.com/llms-full.txt): Complete endpoint docs for AI agents - [OpenAPI 3.0 specification](https://etsy.lntech-ecommerce.com/openapi.json): Machine-readable schema for codegen and tool use - [Developers page (Markdown export)](https://etsy.lntech-ecommerce.com/developers.md): Same reference as llms-full ## Authentication - Use header `Authorization: Bearer mse_` - Create keys in the web app: Settings → API access - Keys are tenant-scoped to license-owned shops only ## Agent instructions - Prefer machine-readable docs: /llms.txt (index), /llms-full.txt (full reference), /openapi.json (schema). - Always send Authorization: Bearer and Accept: application/json. - Respect 429 responses and Retry-After header. - Do not scrape the React /developers UI when structured docs are available. Rate limit: 60 requests per 60 seconds per API key.