io.github.hardware-mcp/arduino-mcp-server
Arduino MCP Server
Arduino MCP server for CLI setup, board detection, compile/upload, serial monitoring, and pin refs.
alive probed 2026-10-14
21tools
5.7ktokens in Claude Opus 5.5
6.0ktokens in Claude Code
2.9 %of a 200k context window
3.0ko200k_base estimate
392 msto initialize
23 msto list tools
- Run it
- npx -y arduino-mcp-server@0.2.8 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- arduino-mcp-server 0.2.5
- Capabilities
- prompts, resources, tools
- Instructions
- none
- Claude count
- Claude Opus 5.5, measured 2026-10-14. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/hardware-mcp/arduino-mcp-server
- Website
- https://github.com/hardware-mcp/arduino-mcp-server
- Registry
- active, updated 2026-03-08 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| upload_and_wait_ready | 486 | 16 % |
| upload_sketch | 400 | 13 % |
| serial_write | 333 | 11 % |
| safety_preflight | 257 | 8 % |
| compile_sketch | 193 | 6 % |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.hardware-mcp/arduino-mcp-server)
An entry for every probe that changed the result, the tool count or the token cost: Atom feed. Add it to a feed reader or a Slack RSS app to hear when the server stops answering or its tool set grows.