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 Supergood's 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. Site terms may apply to any integration approach, and how they apply is a determination each team makes for itself.
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.
Supergood's grades measure one thing: can a customer's engineering team get their own data out programmatically? Supergood checks six things (whether a real API exists, how access is gated, data coverage, auth quality, docs and developer experience, and stability) and rolls them into a letter grade. Supergood re-verifies grades, and they only move on evidence.
Yes, via a managed API layer. Supergood builds REST APIs and MCP servers for authenticated enterprise web apps, so AI agents and internal tools can read and write data programmatically. Site terms may apply to any integration approach, and how they apply is a determination each team makes for itself.
Not that we could find. As of August 2026 there is no official Rain POS MCP server in any public registry, and no maintained community server we're aware of. We re-verify this periodically — report an inaccuracy below if we missed one.
Not natively. Rain POS doesn't publish an MCP server, so MCP clients like Claude, Cursor, and Codex have nothing to connect to out of the box. If that changes, this page will reflect it.