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"MCP servers that don't require API keys" matching MCP servers:

  • serial-mcp

    alxgmpr
    A
    license
    A
    quality
    C
    maintenance
    MCP server that lets LLMs talk to serial devices: microcontrollers, routers, modems, embedded Linux, anything with a UART.
    23
    5
    MIT

  • nrf-mcp

    pshanesmith
    A
    license
    A
    quality
    D
    maintenance
    An MCP server for Nordic nRF Connect SDK development that enables users to list, read, and search documentation and sample code from the nrfconnect/sdk-nrf repository. It provides Claude with specialized tools to navigate SDK resources, source files, and configuration examples directly through the GitHub API.
    3
    18
    MIT

  • siglent-sds-mcp

    MagnusJohansson
    A
    license
    A
    quality
    D
    maintenance
    An MCP server that enables AI assistants to control Siglent SDS oscilloscopes over a local network using SCPI commands. It allows users to measure signals, configure channel and acquisition settings, and capture waveforms or screenshots through natural language.
    13
    12
    5
    MIT

  • rs3005p-mcp

    Gigaclank
    A
    license
    A
    quality
    C
    maintenance
    An MCP server that lets AI agents control an RS PRO RS-3005P/RS-6005P programmable DC power supply over USB/RS232, enabling voltage/current control, measurements, output switching, and memory operations.
    14
    MIT

  • UGS-MCP

    zackpeters93
    A
    license
    A
    quality
    B
    maintenance
    MCP server for controlling CNC machines via Universal GCode Sender. Lets Claude (or any MCP-compatible AI assistant) connect to a CNC machine, inspect G-code, and issue motion commands — all through the UGS Pendant REST API.
    19
    4
    MIT

  • OBD MCP Server

    ayhammouda
    A
    license
    A
    quality
    B
    maintenance
    A local-first, read-only MCP server for vehicle diagnostics that exposes structured OBD-II tools for reading PIDs, DTCs, and ECU snapshots without raw protocol access.
    7
    Apache 2.0

  • siglent-sdg-mcp

    MagnusJohansson
    A
    license
    A
    quality
    D
    maintenance
    MCP server that lets AI assistants control Siglent SDG waveform generators over a local network using natural language, supporting signal generation, modulation, sweep, burst, and arbitrary waveforms.
    21
    11
    MIT

  • ros-mcp

    husain-zaidi
    A
    license
    A
    quality
    D
    maintenance
    A Model Context Protocol (MCP) server for ROS 2 that enables GitHub Copilot and other AI agents to interact with ROS 2 systems. This server provides tools for monitoring, debugging, and managing ROS 2 nodes, topics, services, and TF2 frames.
    15
    48
    MIT

  • BLE MCP Server

    es617
    A
    license
    A
    quality
    C
    maintenance
    A stateful Bluetooth Low Energy (BLE) MCP server that enables AI agents to scan, connect, read/write characteristics, and subscribe to notifications on BLE devices.
    35
    17
    MIT

  • mcp-lnav-canbus

    baxtheman
    A
    license
    A
    quality
    C
    maintenance
    A Model Context Protocol (MCP) server that exposes lnav log file analysis capabilities to AI assistants, specifically optimized for Kvaser Plain Text Log Frame CAN bus log processing.
    9
    MIT

  • lava-mcp

    mattface
    F
    license
    B
    quality
    F
    maintenance
    An MCP server that exposes a LAVA instance to agents, enabling querying the board farm, submitting and managing test jobs, and opening interactive board sessions.
    21
  • sbl-probe by soundbytelabs

    sbl-probeofficial

    soundbytelabs
    A
    license
    -
    quality
    D
    maintenance
    Serial communication and protocol analysis MCP server that gives AI coding assistants direct access to serial ports for reading, writing, decoding, and capturing embedded device output.
    MIT