Spec Driven Development
by formulahendry
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
Runs on your computer★ 440MITUpdated 14 months ago
Install
Registry
Overview
Description from the maker (original English)
The MCP server that vets MCP servers: identity, risk grade and per-tool risk before you install.
PopNx MCP’s three pillars
These three are never merged into one score: opinions, measurements and popularity are different things.
- User voiceiNo reviews yetReviews open together with accounts in a later step
- Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
- UsageiNot measured yet★ –
What you can do with it
We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.
- Connection: Runs in the cloud
- Transport: Streamable HTTP
- Category: Other
Install
Pick the AI app you use, then copy the settings.
Before you install
- Basic checks: 1 of 1 passed
- Runs on the maker’s server: what you ask it goes through their server.
- The registry lists no key to fill in.
You need
- Runs in the cloudNothing to install; it connects over the internet
Which app do you use?
Pick your app above. We remember it, so next time the button says “Install in …”.
Works in Claude on the web, desktop and mobile:
- Open Settings → Connectors
- Press Add custom connector
- Paste the address below and press Add
- If it asks you to sign in, sign in with the maker
https://api.policylayer.com/mcpRun this in your terminal
claude mcp add --transport http registry https://api.policylayer.com/mcpOr copy the settings yourself
Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"registry": {
"url": "https://api.policylayer.com/mcp"
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
Or copy the settings yourself
Paste into .vscode/mcp.json in your project
{
"servers": {
"registry": {
"type": "http",
"url": "https://api.policylayer.com/mcp"
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
ChatGPT connects only to servers on the internet:
- Open ChatGPT on the web → Settings → Connectors (Apps)
- Press Create or Add (some plans need Developer mode under Advanced first)
- Paste the address below, give it a name and save
- If it asks you to sign in, sign in with the maker
https://api.policylayer.com/mcpMenu names can differ slightly by plan and over time.
Your choice stays on this device in a cookie; no account needed.
These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
What it can do
We have not read this server’s tool list yet; we check endpoints in rotation.
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 7, 2026
- ✓ Pass
Maker matches the repo
The registry name was verified against the domain policylayer.com (the registry checks domain ownership)
- … Not checked yet
Still maintained
We have not read this repo from GitHub yet
- … Not checked yet
Has a licence
We have not read this repo from GitHub yet
- … Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
- … Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
- … Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint
Compared with others in Otheri
- More stars than 0% of the other 32742 servers in this category
- Published to the registry more recently than 16% of the other 32742 servers in this category
- Basic checks equal to or better than 100% of the other 32742 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 Registry safe?
It passed 1 of 1 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 –, and the latest version (1.0.1) reached the registry 4 months 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 in developer mode.
What can I use instead?
In the same category: Spec Driven Development, Remote Desktop Commander, Asset Notation
Alternatives
Servers in the same category from other makers, sorted by stars.
Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
Remote Desktop Commander
by desktop-commander
Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.
Runs in the cloud★ 211Updated 2 days ago
Install
Asset Notation
by assetnotation
Read and maintain an Asset Notation file on disk: net worth, holdings, valuations, CSV import.
Runs on your computerUpdated today
Install
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.
PolicyLayer Registry MCP Server
The MCP server that vets MCP servers.
Connect your agent to the PolicyLayer registry and it can ask one question before installing or allowing any MCP server: *is this safe?* The answer is the published registry record: verified identity with the evidence, an A to F risk grade, probed auth posture and every tool's risk classification.
- Endpoint:
https://api.policylayer.com/mcp(Streamable HTTP) - Free single-server lookups, no key needed
- 32,500+ published servers and 515,000+ classified tools, kept current by continuous scanning
- Docs: policylayer.com/registry/mcp
Connect
Claude Code
claude mcp add --transport http policylayer https://api.policylayer.com/mcpClaude (desktop / web)
Settings → Connectors → Add custom connector → URL https://api.policylayer.com/mcp
Cursor / Windsurf / VS Code
{ "mcpServers": {"policylayer": { "url": "https://api.policylayer.com/mcp" } } }
Then tell your agent: *"check any MCP server against PolicyLayer before installing it."* Add it to your team's agent instructions and every install gets vetted.
Tools
| Tool | What it returns | Tier |
|---|---|---|
check_mcp_server | Full record for one server: identity + evidence, risk grade, posture, tools riskiest-first. Unknown servers are queued for scanning by the lookup itself. | Free |
search_registry | Published servers matching a name, slug or package substring, with grade and verification on every match. | Free |
check_tool | One tool's full classification: risk analysis and evidence, OWASP classes, parameters, recommended policy default. | Free |
get_change_events | The ordered change feed: drift, posture flips, impostor flags. Cursor-based, with severity filters. | Licence |
Example
Ask your agent *"is the github MCP server safe to install?"* and it calls:
{ "name": "check_mcp_server", "arguments": { "server": "github" } }and gets back the published record (trimmed):
{"slug": "github", "riskGrade": "D", "identity": { "verification": "official", "confidence": "verified" }, "posture": { "auth": "gated", "rateLimited": false }, "toolCount": 86, "tools": [ { "name": "delete_file", "category": "Destructive", "severity": "High", "recommendedPolicy": { "action": "deny" } } ] }
Things to ask your agent
- *"Is the github MCP server safe to install?"*
- *"We're adding the notion and linear MCP servers this week. Vet both and summarise the risks."*
- *"Which of the MCP servers in this project can delete data or move money?"*
- *"Should I allow the execute_sql tool on the postgres server? What policy does PolicyLayer recommend?"*
- *"Find a verified MCP server for Slack and show me its risk grade."*
- *"Check every server in my mcpServers config against PolicyLayer and flag anything below grade C."*
- With a licence key: *"What changed in the servers we depend on since yesterday? Any posture flips or impostor flags?"*
Adding a licence key
get_change_events needs a Registry Licence key (plr_...), self-serve at policylayer.com/registry/pricing.
- Claude Code: append
--header "Authorization: Bearer plr_..."to the command above - Cursor / Windsurf / VS Code: add
"headers": { "Authorization": "Bearer plr_..." }inside the server entry - Claude desktop/web connectors can't send headers; free lookups only
Free and licensed
Everything about a single server is free and complete: the full record, every tool, the whole classification. A Registry Licence adds breadth across the catalogue: the change feed above, plus bulk snapshots, keyset paging and webhooks on the /v1 API.
What this repository is
The connect kit for a hosted service. The server runs at api.policylayer.com; there is no code to run from here. server.json is the listing published to the official MCP Registry as com.policylayer/registry. The MIT licence covers the contents of this repository only; the hosted service and the registry data are licensed separately.