jlc_find_alternatives
Find spec-compatible alternative parts with verification
How to use it
jlc_find_alternatives is exposed by the Pcbparts MCP MCP server. Add the server to your MCP client (Claude Desktop, Cursor, Windsurf and others), and the jlc_find_alternatives tool becomes available to the model automatically. See the full listing for setup details and every tool this server provides.
Install Pcbparts MCP
claude mcp add -s user --transport http pcbparts https://pcbparts.dev/mcpOther tools in Pcbparts MCP (13)
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Search ~285 OSHW reference board schematics by IC, tag, org, or free text. Cross-board consensus shows how ICs are typically used.
Download KiCad symbols and footprints for any part
Search for ECAD models, datasheets, and footprint availability
Cross-reference a specific MPN on DigiKey (daily quota applies)
PCB design rules & best practices (41 curated reference files: power, protection, interfaces, MCUs, layout, EMC)
Full details for a specific LCSC part code or MPN lookup
Component pin information from EasyEDA symbols
Primary search — smart query parsing + parametric spec filters (local DB, 575K+ in-stock parts)
Browse categories, subcategories, and filterable attributes
Real-time stock verification via live JLCPCB API (use jlcsearch first)
Cross-reference a specific MPN on Mouser (daily quota applies)
Find sensor ICs/modules by measurement need, protocol, or platform (1,500+ sensors, 56 measure types)