Rain POS API
Rain ships a documented REST API with public Swagger docs at rain-4.gitbook.io covering catalog reads, customer CRUD, orders, and payments. Auth is a static x-api-key header. A mock environment works out of the box; stage and production keys must be requested from Rain.
Frequently asked questions
Rain POS scores D+ on the API Report Card. Rain ships a documented REST API with public Swagger docs at rain-4.gitbook.io covering catalog reads, customer CRUD, orders, and payments. Auth is a static x-api-key header. A mock environment works out of the box; stage and production keys must be requested from Rain.
Without a usable official API, teams fall back on manual exports, file drops, or one-off vendor integrations. The other option is an unofficial API layer like Supergood that automates the authenticated web app directly.
Rain POS (operated by Rain Retail Software, LLC) is a cloud-based point-of-sale, eCommerce website builder, and payments platform purpose-built for specialty retailers.
Vertical-specific specialty retail POS. Rain explicitly targets nine niches: music shops, bike shops, dive shops, jewelry stores, ski shops, outdoor/sporting goods, quilting/fabric/sewing stores, craft stores and boutiques. A shop owner rings sales on a Rain terminal that syncs to a Rain-hosted website so the same SKU, price and stock count are visible online and in-store.
Low/mid-tier. Capterra lists ~134 verified reviews (4.2/5 average) and Software Advice/GetApp profiles are of similar scale, an order of magnitude smaller than Lightspeed Retail, Shopify POS or Square.
Company: Rain Retail Software, LLC. Founded: 2008. Headquarters: Provo, Utah (Springville BBB profile). Employees: 51-200 (privately held). Phone: 385-404-6200 (Utah area code).
Rain Retail Software was founded in 2008 and is headquartered in Provo, Utah. The platform is cloud-native and has been actively developed for ~18 years.
Grades measure one thing: can a customer's engineering team get their own data out programmatically? We check six things (whether a real API exists, how access is gated, data coverage, auth quality, docs and developer experience, and stability) and roll them into a letter grade. Grades get re-verified, and they only move on evidence.
Yes. Supergood maintains an unofficial Rain POS API and MCP server so AI agents and internal tools can read and write Rain POS data. See the Rain POS integration docs at supergood.ai/docs/rain-pos-api.