Pcrzero MCP Server

by pcrzero Your server? Claim it

not responding

Pcrzero is listed as active in the registry but did not answer our last check. 57 installs a week from npm. It exposes 3 tools.

Issue signed receipts for AI agent actions; verify any receipt offline - free, no account.

The linked repository no longer exists on GitHub — it was deleted or made private.

Installs per day peak 18 · avg 5 · -2% w/w

a month agotoday

Uptime history 88 days of history · worst day 0%

88 days agonow

0.0%

Uptime 24h

0 of 91 checks

Tools

read from the server

135 ms

Response time

average over 24h

Installs / week

npm and PyPI

Pcrzero does not always answer

Over the last week it answered 0.0% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 13 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add mcp --transport http https://mcp.pcrzero.com/mcp

Settings → Connectors → Add custom connector, then paste this address

https://mcp.pcrzero.com/mcp

~/.codex/config.toml

[mcp_servers.mcp]
url = "https://mcp.pcrzero.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "mcp": {
      "url": "https://mcp.pcrzero.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "mcp": {
      "type": "http",
      "url": "https://mcp.pcrzero.com/mcp"
    }
  }
}

Available tools 3

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

issue

issue_receipt

Adjudicates an attestation document against a policy and returns the verdict together with a signed receipt pair — the durable, independently checkable proof that this decision was made, by these keys, over this document. **Metered: every call bills one `receipt_verifications` unit against the API key configured for this server, and a `fail` verdict bills exactly like a `pass`. You are paying for the adjudication, not for the answer you wanted.** This is the only tool here that spends. If you already hold a receipt and want to know whether it is genuine, that is `verify_receipt`, which is free and needs no key.

keyset

get_keyset

Returns the current PCRZERO signing keyset — key ids, public halves, and each key's status. Public and unauthenticated: no API key, no cost, no account. This is the same document an outside party fetches to check a PCRZERO receipt without trusting us, and fetching it is how you stop taking our word for anything.

verify

verify_receipt

Checks a PCRZERO receipt pair against the signing keyset: whether the signature holds, and whether the receipt says what it appears to say. **Free, with no API key and no account, and it stays free.** Offline by default — supply `keyset` and this call touches the network not at all; omit it and the server fetches the public keyset from api.pcrzero.com once. The result field `keyset_source` tells you which of the two happened, every time. This tool issues nothing, bills nothing, and cannot spend. It is the half of PCRZERO you never pay for.

Endpoints

URL	Transport	State	Latency	Checked
https://mcp.pcrzero.com/mcp	streamable-http	answering	135 ms	13 min ago

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4 tools answering

Pcrzero — questions

Answers built from our own checks of this server.

What can Pcrzero do?

It exposes 3 tools, read directly from the server on our last check. Among them: get_keyset, issue_receipt, verify_receipt. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Pcrzero working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 0 of 91 checks got a reply (0.0%), average response time 135 ms. The bar chart above shows every period we have measured.

Is Pcrzero still maintained?

The linked repository no longer exists on GitHub — it was deleted or made private. We show this because it changes what you can expect: an unmaintained server may keep answering for months and then stop without warning.

The registry lists Pcrzero as active — why does it not respond?

The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.

How do I connect Pcrzero?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Pcrzero need an API key?

No. Pcrzero completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 3 of them are readable on this page. This is what we observed, not what the docs claim.

How many people use Pcrzero?

The npm package @scytalex-llc/pcrzero-mcp was installed 57 times in the last week. Week over week that is -2%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.