Sierra Circuits API
Sierra Circuits has no public API and no developer portal. Quotes, orders, and BOM data live inside the customer portal, and the only api host answers a bare health check. A vendor built KiCad plugin is the closest thing to programmatic access.
Frequently asked questions
Sierra Circuits scores F on Supergood's API Report Card. Sierra Circuits has no public API and no developer portal. Quotes, orders, and BOM data live inside the customer portal, and the only api host answers a bare health check. A vendor built KiCad plugin is the closest thing to programmatic access.
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.
Sierra Circuits is a United States printed circuit board manufacturer that sells fabrication, assembly, and component sourcing through protoexpress.com.
Manufacturing, specifically hardware and electronics engineering teams buying prototype and production printed circuit boards. A hardware engineer uploads Gerbers and a bill of materials, gets an instant online quote with chosen quantity and turn time, optionally adds assembly, and checks out, or files a custom quote questionnaire when the design falls outside standard specs.
Sierra Circuits is an established United States quick turn PCB fabricator that markets fully domestic in house manufacturing and distributes free design tools and a KiCad plugin to reach engineers directly, but the research surfaced no published customer counts, revenue figures, or named reference accounts, so its footprint reads as a well known specialist shop rather than a numerically proven market leader.
The platform holds the record of what a hardware team actually builds: quote requests with quantity, layer count, material, and turn time, uploaded Gerber and drill data, stackup definitions, bills of materials and the component sourcing decisions behind them, design for manufacturability findings from Better DFM, purchase orders and checkout records, Sierra Project SPX status with engineering questions and issue threads, shipment and order history, and the account profile and address book.
The public surface is a current generation marketing site plus browser based quoting, project tracking, and design tooling, so the user facing side is modern in the sense that it is fast, visual, and fully online.
Common alternatives include JLCPCB, PCBWay, MacroFab, CircuitHub, Advanced Circuits. Graded alternatives appear under "More from the report card" below.
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.
Not that we could find. There is no official Sierra Circuits 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. Sierra Circuits 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.