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APEX PSI MCP Server

local only

APEX PSI runs on your own machine — the client starts it, so there is no endpoint to ping. 316 installs a week from npm. Last commit 1 Nov 2026.

Append-only evidence receipts for AI records: seal, verify, cite, chain-check, anchor status.

Installs per day peak 179 · avg 11 · +550% w/w
a month agotoday
316
Installs / week
npm · apex-psi-mcp
1
Stars
0 open issues
1 Nov 2026
Last commit
5 releases in 90 days
MIT
License
JavaScript

Nothing serious here today

Today is the operative word: we check APEX PSI every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Three servers free · no card

Connect this server

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.

run in your terminal
claude mcp add apex-psi-mcp -- npx -y apex-psi-mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "apex-psi-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "apex-psi-mcp"
      ]
    }
  }
}
~/.codex/config.toml
[mcp_servers.apex-psi-mcp]
command = "npx"
args = ["-y", "apex-psi-mcp"]
.cursor/mcp.json
{
  "mcpServers": {
    "apex-psi-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "apex-psi-mcp"
      ]
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "apex-psi-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "apex-psi-mcp"
      ]
    }
  }
}

Optional settings from the registry entry, left out of the block above: APEX_API_BASE (Optional API base URL override. Default: https://qhtntebpcribjiwrdtdd.supabase.co/functions/v1 (the public APEX PSI notary). Free allowance with no key: 20 operations/minute, 100/day), APEX_API_KEY (Optional API key. It raises the daily ceiling for a workload; it is never required to seal or to verify, and it cannot change what a receipt is allowed to claim).

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APEX PSI — questions

Answers built from our own checks of this server.

Why is there no uptime for APEX PSI?
APEX PSI runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the npm package apex-psi-mcp was installed 316 times last week.
How do I connect APEX PSI?
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 runs locally, so the command pulls apex-psi-mcp straight from npm; nothing to host, nothing to sign up for.
How many people use APEX PSI?
The npm package apex-psi-mcp was installed 316 times in the last week. Week over week that is +550%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is APEX PSI open source?
Yes — it is published under the MIT licence, written in JavaScript and 1 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.