Mettle MCP runs on your own machine — the client starts it, so there is no endpoint to ping. 749 installs a week from pypi. Last commit 7 Sep 2026.
Experimental machine-oriented challenges and signed results. Does not verify identity or substrate.
We read the source, 23 h ago · rules 3dff92dd89df
What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.
completed = subprocess.run( # nosec B603
Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.
We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add mettle-mcp -- uvx mettle-verifier
{
"mcpServers": {
"mettle-mcp": {
"args": [
"mettle-verifier"
],
"command": "uvx"
}
}
}
[mcp_servers.mettle-mcp]
command = "uvx"
args = ["mettle-verifier"]
{
"mcpServers": {
"mettle-mcp": {
"args": [
"mettle-verifier"
],
"command": "uvx"
}
}
}
{
"mcpServers": {
"mettle-mcp": {
"args": [
"mettle-verifier"
],
"command": "uvx"
}
}
}
Verify claims, resolve FIGI identity, extract claims, and sign x402 delivery receipts over MCP.
Verify an AI agent's payment authority: signed mandates, allowlists, and tamper-proof receipts.
Verify a persona's DID-signed identity and query value-based judgment — advisory only, no actions.
External counterparty-risk checks and signed receipts for autonomous agents and machine payments.
External counterparty-risk checks and signed receipts for autonomous agents and machine payments.
Security research: MCP registries verify identity, not tool behavior. See gtfo.dev.
Contract-change authorization for AI agents. Signed receipts verify offline.
13 micro-tools for agents: read pages, verify email, convert, validate, diff, extract. AI-operated.
Answers built from our own checks of this server.