Is vouch safe to use?

vouch scores 86/100 (grade B) on the Canopii Trust Index — good, minor gaps. It passes 16 of the 23 security controls that apply to it, with no confirmed security failures.

How reliable is the security score for vouch?

We could evaluate 98% of the controls that apply to vouch. Scores are deterministic — the same source always produces the same score — and a partially-scannable server cannot present a high one, because confidence caps the result. The scanner is open source, so this score can be reproduced independently.

Does vouch have any security advisories?

vouch has 2 non-scoring advisories — observations worth a human review that deliberately do not affect the deterministic score, since they can be noisy.

How was vouch scored?

Its published source was scanned against a fixed catalog of weighted security controls covering code safety, committed secrets, dependency vulnerabilities, tool-description integrity, authentication and transport, and maintenance. A confirmed flaw caps the score outright regardless of what else passes, and its live endpoint was additionally probed to verify what it actually exposes. The full rubric is published.

vouch MCP Server Security Report

io.github.notifuturo/vouch

Check if a counterparty is safe to pay: trust/risk score for AI agents. Scam/phishing screen.

86B

Security Trust Score

Grade B · Moderate posture

Tier 1 · Public sourceHigh confidence · 98% Dynamically scannedlatest v0.1.1 Repository Publisher-verified

Declared MCP capabilities

ResourcesPrompts

Run it securely

Host io.github.notifuturo/vouch in a governed environment — SSO in front, every tool call attributed and audited.

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The short answer

Is vouch safe to use?: vouch scores 86/100 (grade B) on the Canopii Trust Index — good, minor gaps. It passes 16 of the 23 security controls that apply to it, with no confirmed security failures.
How reliable is the security score for vouch?: We could evaluate 98% of the controls that apply to vouch. Scores are deterministic — the same source always produces the same score — and a partially-scannable server cannot present a high one, because confidence caps the result. The scanner is open source, so this score can be reproduced independently.
Does vouch have any security advisories?: vouch has 2 non-scoring advisories — observations worth a human review that deliberately do not affect the deterministic score, since they can be noisy.
How was vouch scored?: Its published source was scanned against a fixed catalog of weighted security controls covering code safety, committed secrets, dependency vulnerabilities, tool-description integrity, authentication and transport, and maintenance. A confirmed flaw caps the score outright regardless of what else passes, and its live endpoint was additionally probed to verify what it actually exposes. The full rubric is published.

Reputation2stars0forks9open issues32d agolast commit<1yage

Security controlslatest scored version v0.1.1

Each control is evaluated deterministically with evidence. The score is earned from passing controls; a failed guard caps it.

Model–MCP Runtime Guardrails

Warn
Tool Definition Integrityguard2 tool description(s) drifted after publish (no risk signals in diff)
Every consecutive version pair is diffed for new injection markers or destructive scope — a risky diff anywhere in history is a rug-pull (fail, durable); benign description drift warns.
vouch_scorevouch_report
Fix: Never add hidden directives or destructive scope to an already-published tool; document description changes in release notes.
Pass
Indirect Prompt Injection (IPI) Defensesguardno injection markers
Tool/prompt/resource text is free of hidden instructions that could hijack the agent.
Pass
Strict JSON Schema EnforcementadditionalProperties:false present
Tool inputs are constrained (additionalProperties:false), so unexpected arguments can't be smuggled in.
Pass
User-in-the-Loop / Approval Scopeguardno destructive tool scope
No over-broad or destructive tools (arbitrary shell, bulk-delete) that warrant human approval.

Application Security Checks

Warn
No path traversalguard6 occurrences
Naive path checks let tools read/write outside intended directories (EscapeRoute-class).
examples/buyer.ts:68src/db/denylist.ts:31src/index.ts:77src/scoring/signals/domainHeuristics.ts:24
Fix: Resolve to a canonical path and verify containment; reject ../ and symlinks.
Warn
No SSRF sinksguard2 occurrences
Fetching tool-supplied URLs can pivot into internal networks and metadata services.
examples/buyer.ts:110src/db/denylist.ts:25
Fix: Allow-list destinations; reject arbitrary/loopback/link-local URLs.
Warn
No known-vulnerable dependencies2 of 33 runtime deps vulnerable; worst high
Runtime dependencies (parsed from the lockfile) are scanned against OSV.dev for published CVEs. Advisory: flagged dependencies lower the score but don't hard-cap it, since transitive reachability is unproven.
[email protected] — GHSA-4c8g-83qw-93j6[email protected] — GHSA-7p8r-x3mc-p8w7[email protected] — GHSA-v2hh-gcrm-f6hx[email protected] — GHSA-54fx-42gc-7vw4
Fix: Upgrade the flagged dependencies past their fixed versions.
Warn
Adoption & popularitylimited adoption
A small, capped nudge from stars/downloads — widely-used servers get more eyes on bugs. It can never offset a real security failure.
Fix: Adoption grows naturally with real-world use; this never gates the score.
Pass
No command-injection sinksguardno sinks found
Untrusted tool input reaching a shell yields remote code execution.
Pass
No dynamic code executionguardno sinks found
eval()/exec()/Function() on tool-derived strings allows arbitrary code execution.
Pass
No unsafe deserializationguardno sinks found
pickle/yaml.load/etc. on untrusted data can execute code.
Pass
No committed secretsguardno secrets found
Hardcoded keys/tokens in published source are live credentials an attacker can use.
Pass
Credentials sourced from environmentreads credentials from environment
Reading secrets from env/secret stores avoids hardcoding them.
Pass
Dependencies pinned (lockfile)lockfile present
A lockfile makes installs reproducible and resistant to silent dependency swaps.
Pass
Actively maintainedrecent commits
Unmaintained servers don't receive security fixes.
Pass
Repository not archivedguardactive
Archived repositories will never be patched.
Pass
Declares a licenseMIT
A clear license is required for legal enterprise use.
Pass
Has a security policySECURITY.md present
A SECURITY.md gives a private path to report vulnerabilities.
Not checked
Signed releasesnot evaluated
Signed releases let consumers verify artifacts weren't tampered with.
N/A
No install/post-install scriptsguardno published package
install hooks run arbitrary code on every consumer at install time.
N/A
Package name not typosquattingguardno published package
Names mimicking popular packages are a common malware delivery vector.
N/A
Published with provenanceno published package
Build provenance attests the artifact was built from the claimed source by CI.
N/A
Established maintainerno published package
Brand-new / single anonymous maintainers raise takeover and malware risk.

Transport & Trust Model

Warn
Execution Sandboxingruns natively (no container image)
A container/sandbox image limits blast radius; a server that runs natively has full host access.
Fix: Ship a Dockerfile/Containerfile (or document a sandboxed run) so the server runs isolated.
Pass
Transport Encryption (TLS)guardall remotes use HTTPS
Plaintext HTTP exposes traffic and bearer tokens to interception.
Pass
IAM / Authentication ScopingOAuth / PRM handling detected
OAuth 2.1 / Protected Resource Metadata gates who can invoke tools.
Pass
Network Exposureno bind-all detected
Binding 0.0.0.0 or exposing debug inspectors widens the attack surface.
N/A
Live Endpoint Reachablenot dynamically scanned
A dynamic scan connected to the declared remote endpoint and it responded — verified live, not a dead URL.
N/A
Authentication Enforced (live)not dynamically scanned
If the server declares auth is required, it must actually reject anonymous clients. Serving tools to unauthenticated callers is a real exposure.

AI-flagged — for review

Observations from an AI review of tool descriptions. These are advisory only and do not affect the score — they can be noisy and need human judgement.

info
Tool "vouch_score" description changed after publish
Benign definition drift: the description changed vs the prior version with no risk signals in the diff. Clients approve tools by name and don't re-review on update, so the change is invisible to existing grants.
info
Tool "vouch_report" description changed after publish
Benign definition drift: the description changed vs the prior version with no risk signals in the diff. Clients approve tools by name and don't re-review on update, so the change is invisible to existing grants.

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Versions

Version	Score	Status	Published
v0.1.1latest	86B	scored	5/22/2026
v0.1.0	88B	scored	5/22/2026

Wondering how this compares? The MCP Security Index tracks grade distribution, committed secrets, and missing authentication across the whole ecosystem, refreshed monthly.