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MTIB MCP Server

by MateoSegura
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Python
Remote

MTIB MCP Server

MCP (Model Context Protocol) server that wraps the MTIB V2 gRPC API, enabling Claude Code to interact with embedded hardware test benches.

Setup

# Install
pip install -e .

# Regenerate proto stubs (if mtib_v2.proto changes)
./generate_proto.sh

Related MCP server: Serial MCP Server

Claude Code configuration

Add to .mcp.json:

{
  "mcpServers": {
    "mtib": {
      "type": "stdio",
      "command": "python3",
      "args": ["-m", "mtib_mcp.server"],
      "env": {
        "MTIB_HOST": "192.168.1.100",
        "MTIB_PORT": "50054"
      }
    }
  }
}

Available tools

Tool

Description

Discovery

mtib_health_check

Check connectivity, version, capabilities

mtib_list_targets

List target devices and debug probes

Flash

mtib_flash

Flash firmware to a target

mtib_reset

Reset a target device

Debug

mtib_debug_connect

Open a debug session (returns session_id)

mtib_debug_disconnect

Close a debug session

mtib_debug_status

Get halt reason, PC, registers

mtib_debug_control

Halt, resume, step, step over

mtib_debug_backtrace

Get stack trace

mtib_debug_memory

Read/write target memory

mtib_debug_breakpoint

Set/clear breakpoints

Serial & Logs

mtib_uart_open

Open UART and start background buffering

mtib_uart_read

Read buffered lines (cursor-based, no data loss)

mtib_uart_close

Close UART stream

mtib_zephyr_shell

Execute a Zephyr shell command

mtib_zephyr_logs_open

Start buffering Zephyr log entries

mtib_zephyr_logs_read

Read buffered log entries (cursor-based)

mtib_zephyr_logs_close

Close log stream

Power

mtib_power_measure

Measure power over a duration

mtib_power_control

Enable/disable/query power channels

Testing

mtib_twister_run

Run Twister test suite

Bus I/O

mtib_i2c_scan

Scan I2C bus

mtib_i2c_transfer

Read/write I2C device

Streaming data guarantee

UART and Zephyr log streams use persistent background buffers. When you call mtib_uart_open, a background task continuously drains the gRPC stream into a 5,000-entry ring buffer. Each entry gets a monotonic sequence number (cursor).

mtib_uart_open(target_id="nrf52840_dk")  →  { stream_key, status: "buffering" }
mtib_uart_read(stream_key, cursor=0)     →  { lines: [...], cursor: 347 }
# ... time passes, DUT keeps printing ...
mtib_uart_read(stream_key, cursor=347)   →  { lines: [...], cursor: 512 }
mtib_uart_close(stream_key)

As long as the ring buffer doesn't wrap (5,000 entries by default), no data is lost between reads.

Environment variables

Variable

Default

Description

MTIB_HOST

localhost

MTIB gRPC server hostname

MTIB_PORT

50054

MTIB gRPC server port

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