Click on "Deploy Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type @ followed by the MCP server name and your instructions, e.g., "@at-mcp List the available serial ports and show signal strength for the modem."
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
A native Python MCP server for talking to cellular modems and radio modules via AT commands over a serial port (pyserial). It lets LLM agents enumerate serial ports and run read-only diagnostics: modem identity, IMEI, signal quality, network registration.
AT commands are publicly standardized in 3GPP TS 27.007 (plus TS 27.005
for SMS), so this project contains no proprietary or GPL code. It is the
serial-port sibling of sahara-mcp and follows the same design.
ALPHA — NOT TESTED. This server is not tested against real modems. The result-code decoders follow the 3GPP spec but have not been validated on hardware. Use at your own risk, treat output sceptically, and start with a USB dongle you don't mind restarting.
at_list_ports — enumerate serial COM/ACM ports visible to pyserial
at_command — send any AT command, return raw result lines (guarded to
AT / AT+ prefixes)
at_info — ATI (manufacturer/model/rev) + AT+CGMR
at_identity — AT+CGSN (IMEI), AT+CGMI, AT+CGMM
at_signal — AT+CSQ (RSSI/BER) decoded; merges AT+CESQ if supported
at_network — AT+COPS? operator + AT+CREG?/AT+CGREG? registration
state (home/roam/searching/denied/unknown/not registered)
at_power — AT+CFUN=0 / AT+CFUN=1 to toggle the radio (opt-in; this is
the only tool that changes device state)
Related MCP server: Serial MCP Server
Windows Device Manager:
Press Win+X → Device Manager.
Expand Ports (COM & LPT) — the modem usually appears as "USB-SERIAL CH340 (COM3)", "USB-SERIAL CP210x (COM5)", "Standard Serial over Bluetooth link (COM7)", or the modem vendor's own name.
The COM number in parentheses is the port argument (e.g. COM3).
USB dongles / radio modules (SIM7000/SIM7600, Quectel EC25/BG96, Sierra, u-blox, etc.): plug the module in, note the new port that appears under Ports (COM & LPT), and set a matching baud rate (115200 is the typical factory default). If no port appears, you may need the vendor USB driver or a USB‑to‑TTL adapter for bare radio modules.
pip install -e .This pulls in mcp and pyserial.
Start the MCP server and point an MCP client (e.g. opencode, Claude Desktop) at it:
python -m at_mcp_server # stdio transportExample tool calls:
at_list_ports()
at_info(port="COM3")
at_identity(port="COM3")
at_signal(port="COM3")
at_network(port="COM3")
at_power(port="COM3", state="off") # drops calls/data!
at_power(port="COM3", state="on")3GPP TS 27.007 — AT command set for User Equipment (RTTI / AT+CSQ, AT+COPS?, AT+CREG?, AT+CGSN, AT+CFUN, …)
3GPP TS 27.005 — SMS AT commands
GPL-3.0. Copyright (c) 2026 libertyrights. All code here is original; AT command semantics come from the public 3GPP specifications.
This server cannot be deployed
Provides capabilities that let LLM agents perform a range of infrastructure management tasks.
Control real Android and iOS devices with LLM agents — tap, swipe, type, automate flows.
Agent-readiness scanner (0-5 score), robots.txt + llms.txt generators, managed agent enablement.
Operate Linux, macOS and Windows from your LLM. Every action runs through an auditable allowlist.
