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.
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.
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 apex-psi-mcp -- npx -y apex-psi-mcp
{
"mcpServers": {
"apex-psi-mcp": {
"command": "npx",
"args": [
"-y",
"apex-psi-mcp"
]
}
}
}
[mcp_servers.apex-psi-mcp]
command = "npx"
args = ["-y", "apex-psi-mcp"]
{
"mcpServers": {
"apex-psi-mcp": {
"command": "npx",
"args": [
"-y",
"apex-psi-mcp"
]
}
}
}
{
"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).
Fact-check receipts: search published claim verdicts with cited evidence, or verify a new claim.
Verify AI-agent revenue: recompute a Merkle proof and check it against an on-chain anchor.
Read-only evidence for the tools agents run: MCP server records, coverage and policy.
Read-only local evidence checks for product records, feed snapshots, and dimensions.
Personal finance for AI agents: budgets, receipts, net worth, spend checks. Read-only OAuth.
Pay for APIs with USDC. Read-only x402 payment discovery, verification, evidence, and status.
One-stop claim verification for AI agents: verdicts with confidence, evidence, signed receipts.
Verification of signed records, plus an EU DPP check.
Answers built from our own checks of this server.