Proof Layer runs on your own machine — the client starts it, so there is no endpoint to ping. 39 installs a week from npm. Last commit 4 May 2026.
Signed, hash-chained provenance receipts for AI agent actions.
Nothing serious here today
Today is the operative word: we check Proof Layer every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
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.
claude mcp add proof-layer -e 'PROOF_LAYER_API_KEY=<PROOF_LAYER_API_KEY>' -- npx -y @proof-layer/mcp{
"mcpServers": {
"proof-layer": {
"command": "npx",
"args": [
"-y",
"@proof-layer/mcp"
],
"env": {
"PROOF_LAYER_API_KEY": "<PROOF_LAYER_API_KEY>"
}
}
}
}[mcp_servers.proof-layer]
command = "npx"
args = ["-y", "@proof-layer/mcp"]
env = { PROOF_LAYER_API_KEY = "<PROOF_LAYER_API_KEY>" }{
"mcpServers": {
"proof-layer": {
"command": "npx",
"args": [
"-y",
"@proof-layer/mcp"
],
"env": {
"PROOF_LAYER_API_KEY": "<PROOF_LAYER_API_KEY>"
}
}
}
}{
"servers": {
"proof-layer": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@proof-layer/mcp"
],
"env": {
"PROOF_LAYER_API_KEY": "<PROOF_LAYER_API_KEY>"
}
}
}
}Put your own value in place of
<PROOF_LAYER_API_KEY> (Your Proof Layer API key from https://prooflayer.world999labs.com/dashboard/keys).
The author’s registry entry marks it as required.
Optional settings from the registry entry, left out of the block above:
PROOF_LAYER_API_URL (Override the default API endpoint (default: https://prooflayer.world999labs.com)), PROOF_LAYER_TELEMETRY (Set to 'off' to disable anonymous usage telemetry (default: on)).
Alternatives to Proof Layer
same job, measured the same wayIssue & verify signed (ed25519), hash-chained, timestamped provenance receipts for agent actions.
Governance layer for agentic AI — signed, verifiable receipts for every agent action.
Hash-chained local document store with signed receipts and an orient protocol for stale agent memory
Tamper-evident audit trails for AI agents — Ed25519-signed, hash-chained, EU AI Act ready.
Pre-action attestation perimeter for AI agents — 8 primitives, signed C18 receipt per call.
Independent effect verification and signed receipts for consequential AI agent actions.
The record layer for the machine age: counter-signed receipts and agent action records.
Exact-action approval for consequential agent actions: request, track, and verify signed receipts.
Proof Layer — questions
Answers built from our own checks of this server.