GuardLayer

Name: GuardLayer
Author: solvionholdings

by solvionholdingsversion 1.0.1i★ 0iRuns in the cloud

Registry nameio.github.solvionholdings/guardlayer

How to install

What it does

Security checks for Next.js + Supabase apps: code scan, read-only live DB check, fix confirmation.

Connects Runs in the cloud
Account or key No key needed
Category Developer tools

Install

Pick the AI app you use, then copy the settings.

Passed 4/5 checks · What you ask goes through the maker’s server (www.guardlayer.io) · ✓ Commands checked Nov 13, 2026

First: which AI do you use?

ClaudeWeb · app · phoneChatGPTWebClaude CodeTerminalCursorCode editorVS CodeCode editorOtherOther apps

Pick your app and the steps appear below.

Works with Claude · about 2 min

No key, nothing to install · Set it up once on claude.ai or the desktop app, then use it in chat · free accounts can add 1 · on Team/Enterprise an Owner adds it

Open Claude’s Connectors page
CustomizeConnectors
Done
Click “Add” → “Custom” → “Web” and fill in these 2 fields
Copy each value into the field with the same name in Claude, then click Continue
Name · NameGuardLayer
Remote MCP server URL · Addresshttps://www.guardlayer.io/api/mcp
Click Continue past the sign-in settings Claude detected · under Authentication choose what the maker says (Sign in now, Sign in when needed or No sign in), then click Add
Done
Turn it on in a chat
+ConnectorsGuardLayer
Done
Try it
Use GuardLayer and tell me what you can do for me, then show me one thing
✓ If Claude says it is using GuardLayer or shows a GuardLayer tool in the answer, you are connected

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with ChatGPT, depending on your plan

Full MCP: ChatGPT Business, Enterprise or Edu on the web · Pro: connects with read/fetch permissions, so tools that change data may not work · Plus: not confirmed in OpenAI’s docs; if you see an add-custom-MCP option on the Plugins page you can try these steps · web only

Open ChatGPT’s add-MCP page on the web
Plugins+Add custom MCP server
Done
Fill in the name and address
Enter a name, paste the address under Connection, tick the risk warning and click Create as a plugin
Name · NameGuardLayer
Connection · Addresshttps://www.guardlayer.io/api/mcp
Done
Pick GuardLayer in a chat
Start a new chat and pick GuardLayer from your plugins before typing
Done
Try it
Use GuardLayer and tell me what you can do for me, then show me one thing
✓ If ChatGPT says it is using GuardLayer or shows a GuardLayer tool in the answer, you are connected

Menu names checked against OpenAI’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with Claude Code · about 2 min

No key, nothing to install

Open Terminal
Mac: press Command+Space and type Terminal · Windows: open PowerShell
Done

Paste this command and press Enter

claude mcp add --transport http --scope user guardlayer https://www.guardlayer.io/api/mcp

Done

Type /mcp in Claude Code
You should see GuardLayer listed as connected
Done
Try it
Use GuardLayer and tell me what you can do for me, then show me one thing
✓ If Claude Code says it is using GuardLayer or shows a GuardLayer tool in the answer, you are connected

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with Cursor · about 2 min

No key, nothing to install

Click this button to open Cursor
Open in Cursor
Cursor asks you to confirm; click Install
Done
Open the AI chat in Cursor in Agent mode
Done
Try it
Use GuardLayer and tell me what you can do for me, then show me one thing
✓ If Cursor says it is using GuardLayer or shows a GuardLayer tool in the answer, you are connected

Menu names checked against Cursor’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with VS Code · about 2 min

No key, nothing to install

Click this button to open VS Code
Open in VS Code
VS Code asks you to confirm; click Install
Done
Open the AI chat in VS Code in Agent mode
Done
Try it
Use GuardLayer and tell me what you can do for me, then show me one thing
✓ If VS Code says it is using GuardLayer or shows a GuardLayer tool in the answer, you are connected

Menu names checked against VS Code’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Other apps that use MCP, such as Windsurf, Zed or Gemini CLI, each add servers differently. See how in the app list.

See every app that uses MCP →

Address for apps that connect over the web

Addresshttps://www.guardlayer.io/api/mcp

JSON settings are under “For developers” below

Stuck? Ask people who use GuardLayer💬 Discussion →

For developers: Terminal commands and JSON settings

Over the web

Claude Code

claude mcp add --transport http --scope user guardlayer https://www.guardlayer.io/api/mcp

Cursor (~/.cursor/mcp.json)

{
  "mcpServers": {
    "guardlayer": {
      "url": "https://www.guardlayer.io/api/mcp"
    }
  }
}

VS Code (mcp.json)

{
  "servers": {
    "guardlayer": {
      "type": "http",
      "url": "https://www.guardlayer.io/api/mcp"
    }
  }
}

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

At a glance

GitHub stars i: 0
Downloads per weeki: Not on npm/PyPI
Licence i: MIT
Connection: Runs in the cloud
Transport: streamable-http
Latest versioni: 1.0.1
Categoryi: Developer tools
Published to registryi: Nov 11, 2026
Code last changedi: Nov 12, 2026
Maker: solvionholdings
Repo: solvionholdings/guardlayer-plugin
Website: www.guardlayer.io
Registry status: Active

Which apps can use it

Based on how this server connects and on each app’s own docs, checked Nov 10, 2026.

Connect over the internet in

Claude ChatGPT Goose LM Studio Msty Studio Cherry Studio Cursor VS Code + GitHub Copilot Visual Studio Windsurf (Devin Desktop)Zed Kiro Cline Continue JetBrains AI Assistant Claude Code Codex CLI Gemini CLI OpenCode nodecode Warp LibreChat Open WebUI Raycast

All apps, with pros and cons →

What it can do

Tool names and descriptions exactly as the server reported them on Nov 11, 2026. The maker wrote them, not us; we show them as plain text.

scan_files Looks like an instruction to the AI
Static security scan of a Next.js + Supabase codebase: secrets in code or public env vars (NEXT_PUBLIC_, VITE_), service role keys in client code, RLS off or open policies in supabase/migrations, unauthenticated API routes, Server Actions and Edge Functions, unsafe redirects and
get_supabase_snapshot_sql
Returns the read-only SQL for the live Supabase check and how to run it. It reads only catalog metadata (table and column names, RLS flags, policies, grants, triggers, SECURITY DEFINER functions, bucket settings), never table rows, and returns one JSON value.
check_supabase_snapshot
Checks the JSON from get_supabase_snapshot_sql: tables anyone can read, RLS off, policies that only check for a signed-in user (public in practice when sign-ups are open), users who can update their own role or plan columns, exposed SECURITY DEFINER functions, public buckets. Pas

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 13, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account solvionholdings, which owns the repo
✓ Pass
Still maintained
Code last changed yesterday
✓ Pass
Has a licence
Uses MIT
✓ Pass
Endpoint responds
Responded in 741 ms (HTTP 200)
– Not applicable
Sign-in with OAuth
No sign-in needed
✕ Fail
No hidden instructions in tool descriptions
1 tool descriptions contain text that looks like instructions to the AI. Read them below before installing

Discussion

Ask, share a tip or report that it does not work. Sorted by what people marked helpful.

No posts yet. Be the first to ask or share.

Posts here are written by users, not the PopNx team.

User reviews

No reviews yet

Compared with others in Developer toolsi

More stars than 0% of the other 5843 servers in this category
Published to the registry more recently than 92% of the other 5843 servers in this category
Basic checks equal to or better than 51% of the other 5843 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is GuardLayer safe?

It passed 4 of 5 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed yesterday, and the latest version (1.0.1) reached the registry 2 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT on the web (full MCP on Business and above; Pro read-only).

What can I use instead?

In the same category: REA, GitHub, Serena MCP: the IDE for your agent

Others in the same category

Servers in the same category from other makers, sorted by stars.

Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

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GitHub

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

GuardLayer for Claude Code

Security check for Next.js + Supabase apps, run by your AI agent. GuardLayer scans the code, checks the live Supabase project read-only, and after a fix confirms what actually closed.

It catches the holes AI-built apps usually ship with: tables anyone can read, RLS off, policies that only check for a signed-in user (public in practice when anyone can sign up), users who can change their own role or plan, service role keys in frontend code or NEXT_PUBLIC_ / VITE_ variables, and API routes, Server Actions and Edge Functions that don't check the caller.

Install (Claude Code)

claude plugin marketplace add solvionholdings/guardlayer-plugin

claude plugin install guardlayer@guardlayer

The plugin adds the GuardLayer MCP server and a skill that tells Claude when to use it: before a deploy, after changing tables or policies, or when it's about to loosen access to get past a permission error. Then ask: "Check this app for security issues with GuardLayer."

Other MCP clients

The server is a remote MCP server over Streamable HTTP, no install needed:

https://www.guardlayer.io/api/mcp

Cursor (.cursor/mcp.json):

{ "mcpServers": { "guardlayer": { "url": "https://www.guardlayer.io/api/mcp" } } }

Tools

Tool	What it does
`scan_files`	Static scan of the files your agent sends. Each finding comes with the fix.
`get_supabase_snapshot_sql`	A read-only query for the project's catalog: table and column names, RLS flags, policies, grants, triggers, functions, bucket settings. Never rows.
`check_supabase_snapshot`	Checks the snapshot together with your Auth settings. With `previous_issue_keys` it reports what closed, what's new and what's still open.

Privacy

Code and snapshots sent to the server are checked in memory and discarded. Your Supabase access token stays on your machine; Auth settings are reduced to on/off flags and numbers before they are read. See the privacy policy.

Data the plugin sends, and where

Destination	What is sent	When
GuardLayer MCP server (`https://www.guardlayer.io/api/mcp`, the plugin's declared server)	The source files the agent chooses to scan; the read-only catalog snapshot (table and column names, RLS flags, policies, grants, triggers, function and bucket settings, never rows); the project's Auth settings reduced to on/off flags and numbers	When `scan_files` or `check_supabase_snapshot` runs
Supabase Management API (`https://api.supabase.com`), with the user's own access token	The read-only snapshot query, and a read of the project's Auth settings	Only if the agent uses this route to run the snapshot query. The user can instead run it in the Supabase SQL editor or through the Supabase MCP server

Nothing is retained by GuardLayer. Supabase's handling of API requests is covered by Supabase's privacy policy. Usage is counted by tool name only (which tool ran, which client connected), never by content.

More: guardlayer.io/mcp · Browser version: guardlayer.io/check-supabase

GuardLayer

What it does

Install

Open Claude’s Connectors page

Click “Add” → “Custom” → “Web” and fill in these 2 fields

Turn it on in a chat

Try it

Open ChatGPT’s add-MCP page on the web

Fill in the name and address

Pick GuardLayer in a chat

Try it

Open Terminal

Paste this command and press Enter

Type /mcp in Claude Code

Try it

Click this button to open Cursor

Open the AI chat in Cursor in Agent mode

Try it

Click this button to open VS Code

Open the AI chat in VS Code in Agent mode

Try it

Over the web

At a glance

Which apps can use it

Related guides

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Discussion

User reviews

Compared with others in Developer toolsi

Common questions

Others in the same category

REA

GitHub

Serena MCP: the IDE for your agent

README from the maker

GuardLayer for Claude Code

Install (Claude Code)

Other MCP clients

Tools

Privacy

Data the plugin sends, and where