Persyst MCP Server
persyst-mcp
npm
v2.2.7
Published by zaynibaloch — no publish provenance, so origin is unverified, but the source is public: the repository link below is self-declared yet readable, so you can inspect the code before adopting it.
Local-first memory layer for coding agents with hybrid keyword and semantic search.
The grade answers one question — how safe is this server for you to adopt — so it is computed in two auditable stages. Nothing below is an opinion or an LLM's guess; every line is a real term the deterministic engine applied, and the same input always yields the same number.
1. Threat score — 100 − 0 = 100. What the published surface and source actually contain:
The deterministic scan raised no scored threat in the surface it inspected — the threat score stayed at 100. Capability observations and advisory notes are recorded but never lower it.
2. Client adoption risk — 100 − 7 = 93. Three small, subtract-only factors that reflect your risk in adopting it — a clean scan proves less on a powerful, unverified or barely-inspectable package, so the grade says so plainly:
| Points | Adoption-risk factor |
|---|---|
| −6 | capability blast radius (high) — client exposure if the model is manipulated |
| −1 | publisher verification (public source) — no provenance, but the source is public and inspectable |
Capability observations and info notes are shown under Findings but never scored.
Open any row's finding below for the file, line and evidence behind a deduction.
Findings 5
high Shell/command execution in server code (bin/aider.js)MTC-SRC-002
In the server's implementation (`bin/aider.js:24`): Spawning a shell/process is command-execution capability; with unsanitized tool input it is command injection / RCE. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: import { spawn } from 'child_process'; import { createInterface } from 'readline'; import { Client } from '@modelcontex
Fix: Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.
Location: server bin/aider.js
high Shell/command execution in server code (bin/init.js)MTC-SRC-002
In the server's implementation (`bin/init.js:22`): Spawning a shell/process is command-execution capability; with unsanitized tool input it is command injection / RCE. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: port { execSync } from 'child_process'; import { initializeKeys } from '../src/attestation.js'; const __filename = file
Fix: Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.
Location: server bin/init.js
high Shell/command execution in server code (hooks/persyst-hook.js)MTC-SRC-002
In the server's implementation (`hooks/persyst-hook.js:33`): Spawning a shell/process is command-execution capability; with unsanitized tool input it is command injection / RCE. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: import { spawn } from 'child_process'; import { writeFileSync, readdirSync, mkdirSync, existsSync } from 'fs'; import {
Fix: Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.
Location: server hooks/persyst-hook.js
high Shell/command execution in server code (index.js)MTC-SRC-002
In the server's implementation (`index.js:20`): Spawning a shell/process is command-execution capability; with unsanitized tool input it is command injection / RCE. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: spawn } = await import('child_process'); // Prefer NODE env var (set by nvm/fnm/volta), then fall back to 'node' on PA
Fix: Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.
Location: server index.js
high Shell/command execution in server code (src/git.js)MTC-SRC-002
In the server's implementation (`src/git.js:11`): Spawning a shell/process is command-execution capability; with unsanitized tool input it is command injection / RCE. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: port { execFile } from 'child_process'; import { promisify } from 'util'; const execFileAsync = promisify(execFile); /
Fix: Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.
Location: server src/git.js
Tools 19
Each tool and what it can reach — statically extracted from the published source.
get_file_historyingests untrusted inputadd_entityno sensitive capabilityadd_memoryno sensitive capabilityconsolidate_memoriesno sensitive capabilitydelete_memoryno sensitive capabilityexport_audit_logno sensitive capabilityget_agent_statsno sensitive capabilityget_important_memoriesno sensitive capabilityget_memoryno sensitive capabilityget_memory_historyno sensitive capability
Show 9 more tools ↓
get_optimized_contextno sensitive capabilityget_recent_memoriesno sensitive capabilityingest_git_commitsno sensitive capabilitylink_entity_memoryno sensitive capabilitysearch_by_entityno sensitive capabilitysearch_memoriesno sensitive capabilityupdate_memoryno sensitive capabilityverify_attestationno sensitive capabilitywatch_git_repono sensitive capability
What this scan could not see
- Tools were statically extracted from the published source (19 recovered), not enumerated from a running server. Tool-poisoning, Unicode-smuggling, capability and toxic-flow analysis ran on this inferred surface, but a mis-parsed registration could be missed or mis-attributed, so tool-derived findings are capped below “confirmed”. To grade the real runtime surface, scan the running server: --command "npx -y <package>".
Versions 1
Scan history per published version. The engine is deterministic — the same version always yields the same score, so a changed score means the package itself changed.
| Version | Score | Findings | Engine | Scanned |
|---|---|---|---|---|
v2.2.7 latest |
A 93/100 | 5 | 1.13.0 | 2026-08-25 |
Embed this score
Show this server's live Trust Score in your README, docs or website. The badge is served straight from the registry and updates automatically after every rescan — no API key needed. It links back to this page, so anyone who sees the grade can also read the findings behind it instead of taking a number on faith.
Verify this score yourself
The score above is reproducible: the same package version always yields the same result. Run it locally or over the free API — no account, no LLM, fully deterministic.
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