AI testing harness with Jay: risk-based checks, bug investigation, and local evidence reports.
Connect Runs on your machine
claude mcp add carbon -e CARBON_ANALYTICS=<CARBON_ANALYTICS> -e DO_NOT_TRACK=<DO_NOT_TRACK> -- npx -y @testers-ai/[email protected]{
"mcpServers": {
"carbon": {
"command": "npx",
"args": [
"-y",
"@testers-ai/[email protected]"
],
"env": {
"CARBON_ANALYTICS": "<CARBON_ANALYTICS>",
"DO_NOT_TRACK": "<DO_NOT_TRACK>"
}
}
}
}{
"mcpServers": {
"carbon": {
"command": "npx",
"args": [
"-y",
"@testers-ai/[email protected]"
],
"env": {
"CARBON_ANALYTICS": "<CARBON_ANALYTICS>",
"DO_NOT_TRACK": "<DO_NOT_TRACK>"
}
}
}
}{
"servers": {
"carbon": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@testers-ai/[email protected]"
],
"env": {
"CARBON_ANALYTICS": "<CARBON_ANALYTICS>",
"DO_NOT_TRACK": "<DO_NOT_TRACK>"
}
}
}
}Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
CARBON_ANALYTICSOptional | Optional content-free analytics. Off by default; set off to force-disable. |
DO_NOT_TRACKOptional | Set 1 to disable analytics regardless of preferences. |
Details
| Package | @testers-ai/[email protected] (NPM, stdio) |
| First published | 22 Oct 2026 |
| Last updated | 22 Oct 2026 |
| Registry name | io.github.jarbon/carbon |
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