Arduino MCP Server (niradler/arduino-mcp) is an MCP server listed on the M8ven Trust Index. It scores 67 out of 100, grade C. It declares 16 tools. No publisher has claimed this listing.

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C
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67/100

Arduino MCP Server

A comprehensive Model Context Protocol (MCP) server for Arduino CLI interactions, built with FastMCP. This server enables AI agents to seamlessly interact with Arduino CLI for development, debugging, code verification, and more.

→ niradler/arduino-mcp· listed on glama

Limited view. Automated analysis covers part of this stack. Findings reflect what we verified. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

Limited view: static analysis for Python is partially covered.

How we verified

Code Verified⚡ Live Monitored: not connected

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Who stands behind it

niradler

Source: Glama

Is this your MCP?

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Install from

Glamanot scored here

The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.

// key findings
✅
16 tools verified — handlers match their declared behaviour
7 read-only tools verified — handlers contain no write/delete/exec
✅
No credential exfiltration, no sensitive file access, no obfuscation
Static analysis found nothing flowing your secrets to unexpected places.
// environment variables
To run this server yourself, you supply these values. They go in your own MCP client configuration and stay on your machine. The secret label means the value is sensitive, not that the server mishandles it.
configARDUINO_CLI_PATHarduino-cli Path to Arduino CLI executable
configARDUINO_LINT_PATH
configARDUINO_SERIAL_BUFFER_SIZE10 Serial buffer size in MB
configMCP_SKETCH_DIROS-specific\ Override default sketch directory
configARDUINO_CONFIG_FILEAuto-detected Custom Arduino CLI config file path
// quality suggestions

All four hints declared on every tool

16/16 tools missing one or more hints — arduino_cli_command (missing: destructiveHint, idempotentHint); list_ports (missing: destructiveHint, idempotentHint, openWorldHint); list_connected_boards (missing: destructiveHint, idempotentHint), +13 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.

For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.

Tool inputs are validated

12/16 tool handlers declare input schemas (75%)

Declare an inputSchema with zod/joi/yup on every tool definition.

Tool handlers catch errors

12/16 tool handlers wrap calls in try/catch (75%)

Wrap each tool handler body in try/catch and return a structured error response.

License file

No license file

Add a LICENSE file (MIT, Apache-2.0, etc.).

Tests exist

No test files found

Add tests that exercise each declared tool.

Claim the listing to review these findings one by one and send us a correction where you disagree, straight to the team. Claiming also means we tell you when the grade moves, and reach you first if we find anything urgent.

// full audit trail
The findings above are the summary. The full trail, every check we ran, each deduction, the network hosts observed and the dependency advisories, goes to verified publishers, along with an alert whenever a new one lands. Verified publishers can also review each finding and dispute it in one click. Publisher corrections have sharpened several of our checks this month, because the maintainer knows the codebase better than any scanner.
// improvement guidance — verified publishers only
We have 5 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
[![M8ven Score](https://m8ven.ai/badge/mcp/niradler/arduino-mcp)](https://m8ven.ai/mcp/niradler/arduino-mcp)
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commit: dae94d3bfb5aac20942af785d504b74b5395884f
code hash: a0bbba38dbe3d7552c5db126fef80a7e61d90ed03d27e7a5054f330edd13fae2
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