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Serial MCP server

by qarnet·io.github.qarnet/serial-mcp·v0.9.3·16 stars
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MCP server for serial port communication. 25 tools, resources, prompts, and stdio/HTTP transports.

A88/100grade A
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Safety scan
A88/100

full report

Adoption
Growing

16 stars

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If you have run it, two minutes of your experience saves the next person an afternoon.

Serial MCP tools

No tool declarations could be read from the package source. They show once the server is installed.

Public scan report

scanner v0.1.10 · 2026-11-03 · same rubric, same numbers if you re-run it

no findings
  • –Code scanpackage could not be scannedn/a
  • –Live reliabilityno gateway calls yet and no remote to proben/a
  • –Tool poisoningtools not inspected (local package is not executed); not countedn/a
  • Auth qualitylocal package, no credentials required12/15
  • Maintenancelast push 2 days ago15/15
  • Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10
Overall 88/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Serial MCP compares

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
88/100
higher than 75% of 48,255 servers
GitHub stars
16
more than 90% of 28,688 servers

Install Serial MCP in Claude Code, Cursor or VS Code

The registry entry has no remote endpoint or installable package.

What the publisher says

From the Serial MCP repository's README, as published. We do not edit it. Read it on GitHub

serial-mcp for UART and USB serial access

serial-mcp is an MCP server for direct access to serial ports. It reads, writes, and streams UART or USB-serial data to microcontrollers, Arduino boards, STM32 chips, and other embedded targets. Reads use timeouts and pattern matching instead of blocking on a serial monitor.

The server provides always-on RX capture. It decodes TX and RX frames using line, delimiter, length-prefixed, start/end, SLIP, and COBS formats. It provides AT, JSON, shell, NMEA-0183, and Modbus ASCII parsers.

Protocol presets provide checksum validation. The server also supports auto-reconnect, event logging, DTR/RTS, BREAK, and flow control. MCP clients can use these features with serial bootloaders, resets, and embedded boards.

Quick start

Baud defaults to 115200/8-N-1. The server reuses the most recently used high-confidence profile for a known device. It creates a durable generated profile for a new device.

  1. Install the server. See Install for Cargo, Nix, and prebuilt binary options.
  2. Connect an agent. Follow the agent configuration guide, or use the example below.
  3. Discover devices. Call listports() and inspect profilematches. The result shows what a bare open would reuse.
  4. Open a port. Call open(port=...) with only the port.
  1. Talk to the device. Use transact() for command and response exchanges. Use read() for buffered or unsolicited data. Use write() for send-only operations.

Capabilities

Tool catalog (25 tools)

Resources and prompts

Install

Cargo (all platforms)

cargo install serial-mcp

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

Serial MCP: common questions

Is Serial MCP server safe?
Yes, by our scan: it is graded A (88/100). Read the Serial MCP safety report
Does Serial MCP need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Serial MCP maintained?
The last commit was 3 days ago (2026-11-01). The latest release is v0.9.3.
How does Serial MCP compare with other MCP servers?
safety score 88/100 (higher than 75% of 48,255 servers); github stars 16 (more than 90% of 28,688 servers). Full comparison.