Proof Layer MCP (World-999-Labs/proof-layer) is an MCP server listed on the M8ven Trust Index. It scores 74 out of 100, grade C. It declares 8 tools. No publisher has claimed this listing.

Back to MCP Trust IndexM8ven
C
Caution
74/100

Proof Layer MCP

Provides cryptographic governance receipts for AI agents, enabling pre-execution evaluation and signed verdicts (EXECUTE/BLOCK/REVIEW/SHADOW) with offline-verifiable audit trails.

→ World-999-Labs/proof-layer· listed on glama

Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

How we verified

⚡ Live Monitored: not connected

Verified is a snapshot. Live keeps it current, and builds your track record.

⚡ Connect GitHub → continuous verification on every pushwhy connect →

Who stands behind it

World-999-Labs

Source: Glama

Is this your MCP?

Claim it to get a verified publisher badge, a free copy of our full audit findings, and direct contact for any high-priority issues we find. Or connect your repo for our deepest verification, Live Monitored: read-only, revoke anytime. What we access →

⚡ Connect GitHub for Live Monitored

Install from

Glamanot scored here

The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.

// key findings
🚨
Secret credentials may flow to a network call
1 flow detected: PROOF_LAYER_API_KEY. We can’t prove the destination matches the brand the credential belongs to.
⚠️
Known vulnerabilities in dependencies: 1 high
Affects packages this MCP installs at runtime. Upgrade or remove the affected dependency.
🔐
You'll be asked for 2 credentials: PROOF_LAYER_API_KEY, VERIDOCS_API_KEY
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// tools this server exposes8 tools

These names and descriptions are the publisher's own, read from the source code. We print them as written. Our assessment is the findings above, not this list.

pl_evaluate
pl_get_receipt

Retrieve a Proof Layer audit receipt by its UUID. Returns the full receipt including verdict, signature, and policy pack hash.

pl_verify_receipt
pl_list_receipts

List recent Proof Layer audit receipts for the authenticated tenant. Supports filtering by agent and verdict.

pl_usage
pl_list_policy_packs

List all governance policy packs for the authenticated tenant, including which one is currently active.

pl_create_plan
pl_delegate
// known CVEs in dependencies1 high1 low

Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.

high@modelcontextprotocol/sdk@1.0.0GHSA-w48q-cv73-mx4w

Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default

lowtsup@8.0.0GHSA-3mv9-4h5g-vhg3

tsup DOM Clobbering vulnerability

Depend on this server? Get alerted when its CVEs change.Watch this server free →
// environment variables
To run this server yourself, you supply these values. They go in your own MCP client configuration and stay on your machine. The secret label means the value is sensitive, not that the server mishandles it.
🔐 secretPROOF_LAYER_API_KEYYour pl_live_... key. Get one at [prooflayer.world999labs.com](https://prooflayer.world999labs.com).
configPROOF_LAYER_API_URLDefaults to https://prooflayer.world999labs.com. Override for self-hosted or staging environments.
configPROOF_LAYER_TELEMETRYSet to off to disable the anonymous install/heartbeat ping. See [Telemetry & privacy](#telemetry--privacy) below.
configTERM_PROGRAM
🔐 secretVERIDOCS_API_KEY
configVERIDOCS_API_URL
configVERIDOCS_TELEMETRY
// quality suggestions

Tool annotations

No tools have read-only/destructive annotations

Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.

All four hints declared on every tool

8/8 tools missing one or more hints — pl_evaluate (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); pl_get_receipt (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); pl_verify_receipt (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +5 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.

For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.

Tests exist

No test files found

Add tests that exercise each declared tool.

Production dependencies are patched

0 critical, 1 high severity in production deps — @modelcontextprotocol/sdk@1.0.0 (high)

Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.

Claim the listing to review these findings one by one and send us a correction where you disagree, straight to the team. Claiming also means we tell you when the grade moves, and reach you first if we find anything urgent.

// full audit trail
The findings above are the summary. The full trail, every check we ran, each deduction, the network hosts observed and the dependency advisories, goes to verified publishers, along with an alert whenever a new one lands. Verified publishers can also review each finding and dispute it in one click. Publisher corrections have sharpened several of our checks this month, because the maintainer knows the codebase better than any scanner.
// improvement guidance — verified publishers only
We have 4 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
[![M8ven Verified](https://m8ven.ai/badge/mcp/world-999-labs/proof-layer?variant=verified)](https://m8ven.ai/mcp/world-999-labs/proof-layer)
Shows verification status without the grade. Want the grade badge instead? Remove ?variant=verified from the URL.
commit: 68edc25eb2c451b8a2badcc637b94ec2c8f01531
code hash: e932122141fbde13725d9da54ed8cfbbfcbc960a9ab06b9d0f28fb15e14d1f44
view raw JSON →
Check MCPs from inside your assistant
Tool Check · MCP

Vetting this one by hand? Tool Check is an MCP that scores other MCPs. Add it once and ask Claude, ChatGPT, or any MCP client to grade a server, surface CVEs, check the publisher, and suggest safer alternatives — before you install.

https://m8ven.ai/api/mcp/tool-check
check_toolsearch_toolscompare_toolsrecommend_alternativescheck_publisherreport_concern
How to add it →Free · no account needed · works in any MCP client