Specshield MCP Server

Name: Specshield MCP Server
Author: specshield-io

by specshield-ioversion 1.1.1i★ 0iRuns on your computer

Registry nameio.github.specshield-io/specshield-mcp-server

How to install

What it does

The API-change deploy gate for AI coding agents. Read-only breaking-change detection.

Connects Runs on your computer
Account or key Needs SPECSHIELD_API_KEY
Category Developer tools

Install

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

Passed 2/2 checks · Runs on your computer

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, with some setup first

You need a Specshield MCP Server key (create it on the maker’s site) · Install Node.js on your computer first (one time) · Only the Claude desktop app (Windows or Mac), not the web or phone

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Sign up and create a Specshield MCP Server key
Open the maker’s site, sign up and create an API key for the next step. Check the maker’s site for pricing and free plans.
How to get a key is in the maker’s README below
Done
Open the Claude desktop app’s settings file
SettingsDeveloperEdit Config
Done

Paste these settings and save the file

{
  "mcpServers": {
    "specshield": {
      "command": "npx",
      "args": [
        "-y",
        "specshield-mcp-server"
      ],
      "env": {
        "SPECSHIELD_API_KEY": "your-value",
        "SPECSHIELD_API_URL": "your-value",
        "SPECSHIELD_TIMEOUT_MS": "your-value",
        "SPECSHIELD_LOG_LEVEL": "your-value"
      }
    }
  }
}

Paste the key only into the app’s field, never into a chat or to anyone

Done

Quit Claude and open it again
Done
Try it
Use Specshield MCP Server and tell me what you can do for me, then show me one thing
✓ If Claude says it is using Specshield MCP Server or shows a Specshield MCP Server 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

ChatGPT cannot connect Specshield MCP Server yet

Specshield MCP Server runs on your computer, but ChatGPT can only connect servers that run on the web

What you can do instead

A · Use an app that can connect Specshield MCP Server

Steps for Claude →You need a Specshield MCP Server key (create it on the maker’s site) · Install Node.js on your computer first (one time) · Only the Claude desktop app (Windows or Mac), not the web or phone
Steps for Claude Code →You need a Specshield MCP Server key (create it on the maker’s site) · Install Node.js on your computer first (one time)
Steps for Cursor →You need a Specshield MCP Server key (create it on the maker’s site) · Install Node.js on your computer first (one time)
Steps for VS Code →You need a Specshield MCP Server key (create it on the maker’s site) · Install Node.js on your computer first (one time)

B · Others in Developer tools that work with ChatGPT

Picked from the most used in the same category, only ones that connect by address with no key

Sentry✓ ChatGPT
Compiler Explorer✓ ChatGPT
GitDiagram✓ ChatGPT

Works with Claude Code, with some setup first

You need a Specshield MCP Server key (create it on the maker’s site) · Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Sign up and create a Specshield MCP Server key
Open the maker’s site, sign up and create an API key for the next step. Check the maker’s site for pricing and free plans.
How to get a key is in the maker’s README below
Done
Open Terminal
Mac: press Command+Space and type Terminal · Windows: open PowerShell
Done

Paste this command and press Enter

claude mcp add --scope user specshield --env SPECSHIELD_API_KEY=your-value --env SPECSHIELD_API_URL=your-value --env SPECSHIELD_TIMEOUT_MS=your-value --env SPECSHIELD_LOG_LEVEL=your-value -- npx -y specshield-mcp-server

Replace “your-value” with your key before pressing Enter

Paste the key only into the app’s field, never into a chat or to anyone

Done

Type /mcp in Claude Code
You should see Specshield MCP Server listed as connected
Done
Try it
Use Specshield MCP Server and tell me what you can do for me, then show me one thing
✓ If Claude Code says it is using Specshield MCP Server or shows a Specshield MCP Server 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, with some setup first

You need a Specshield MCP Server key (create it on the maker’s site) · Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Sign up and create a Specshield MCP Server key
Open the maker’s site, sign up and create an API key for the next step. Check the maker’s site for pricing and free plans.
How to get a key is in the maker’s README below
Done
Click this button to open Cursor
Open in Cursor
Cursor asks you to confirm; click Install
Done
Fill in your key
In the Specshield MCP Server settings, SPECSHIELD_API_KEY, SPECSHIELD_API_URL, SPECSHIELD_TIMEOUT_MS, SPECSHIELD_LOG_LEVEL is empty; add your key and save
Paste the key only into the app’s field, never into a chat or to anyone
Done
Open the AI chat in Cursor in Agent mode
Done
Try it
Use Specshield MCP Server and tell me what you can do for me, then show me one thing
✓ If Cursor says it is using Specshield MCP Server or shows a Specshield MCP Server 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, with some setup first

You need a Specshield MCP Server key (create it on the maker’s site) · Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Sign up and create a Specshield MCP Server key
Open the maker’s site, sign up and create an API key for the next step. Check the maker’s site for pricing and free plans.
How to get a key is in the maker’s README below
Done
Click this button to open VS Code
Open in VS Code
VS Code asks you to confirm; click Install
Done
Fill in your key
In the Specshield MCP Server settings, SPECSHIELD_API_KEY, SPECSHIELD_API_URL, SPECSHIELD_TIMEOUT_MS, SPECSHIELD_LOG_LEVEL is empty; add your key and save
Paste the key only into the app’s field, never into a chat or to anyone
Done
Open the AI chat in VS Code in Agent mode
Done
Try it
Use Specshield MCP Server and tell me what you can do for me, then show me one thing
✓ If VS Code says it is using Specshield MCP Server or shows a Specshield MCP Server 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 →

JSON settings are under “For developers” below

Stuck? Ask people who use Specshield MCP Server💬 Discussion →

For developers: Terminal commands and JSON settings

Installed on your computer

Claude Code

claude mcp add --scope user specshield --env SPECSHIELD_API_KEY=your-value --env SPECSHIELD_API_URL=your-value --env SPECSHIELD_TIMEOUT_MS=your-value --env SPECSHIELD_LOG_LEVEL=your-value -- npx -y specshield-mcp-server

Claude Desktop (claude_desktop_config.json)

{
  "mcpServers": {
    "specshield": {
      "command": "npx",
      "args": [
        "-y",
        "specshield-mcp-server"
      ],
      "env": {
        "SPECSHIELD_API_KEY": "your-value",
        "SPECSHIELD_API_URL": "your-value",
        "SPECSHIELD_TIMEOUT_MS": "your-value",
        "SPECSHIELD_LOG_LEVEL": "your-value"
      }
    }
  }
}

Cursor (~/.cursor/mcp.json)

{
  "mcpServers": {
    "specshield": {
      "command": "npx",
      "args": [
        "-y",
        "specshield-mcp-server"
      ],
      "env": {
        "SPECSHIELD_API_KEY": "your-value",
        "SPECSHIELD_API_URL": "your-value",
        "SPECSHIELD_TIMEOUT_MS": "your-value",
        "SPECSHIELD_LOG_LEVEL": "your-value"
      }
    }
  }
}

VS Code (mcp.json)

{
  "servers": {
    "specshield": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "specshield-mcp-server"
      ],
      "env": {
        "SPECSHIELD_API_KEY": "your-value",
        "SPECSHIELD_API_URL": "your-value",
        "SPECSHIELD_TIMEOUT_MS": "your-value",
        "SPECSHIELD_LOG_LEVEL": "your-value"
      }
    }
  }
}

Values you fill in

SPECSHIELD_API_KEY secret required env
SpecShield API key
SPECSHIELD_API_URL env
Backend base URL
SPECSHIELD_TIMEOUT_MS env
Per-request timeout (ms)
SPECSHIELD_LOG_LEVEL env
debug|info|warn|error

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: 66/wk
Licence i: No licence stated
Connection: Runs on your computer
Transport: stdio
Latest versioni: 1.1.1
Categoryi: Developer tools
Published to registryi: Aug 17, 2026
Code last changedi: Aug 16, 2026
Maker: specshield-io
Packages: npm: specshield-mcp-server
Repo: specshield-io/specshield-mcp-server
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.

Run on your computer in

Claude 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 Raycast

All apps, with pros and cons →

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

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 12, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account specshield-io, which owns the repo
✓ Pass
Still maintained
Code last changed 3 months ago
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

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 5811 servers in this category
Published to the registry more recently than 28% of the other 5811 servers in this category
Basic checks equal to or better than 100% of the other 5811 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 Specshield MCP Server safe?

It passed 2 of 2 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?

You need to fill in: SPECSHIELD_API_KEY

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed 3 months ago, and the latest version (1.1.1) reached the registry 3 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

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

REA

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GitHub

GitHub’s official server lets AI read and manage code, issues and pull requests in your account. Use GitHub’s hosted version or run it locally with Docker.

by githubWidely used★ 34.4KUpdated 9 days ago

Computer or cloud

Install

Serena MCP: the IDE for your agent

A powerful toolkit for coding, providing semantic retrieval and editing capabilities.

by oraiosWidely used↓ 35.2K/wk★ 31.3KUpdated 6 months ago

Runs on your computer

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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.

SpecShield MCP Server

The API-change deploy gate for AI coding agents. Ask *"is it safe to ship this API change to my consumers?"* right inside Claude, Cursor, and other MCP clients — and catch breaking changes before they reach your consumers.

It's a thin adapter over the SpecShield backend. Every tool is read-only / analyze-only — it never modifies your code.

Why not just diff specs? Plenty of tools (including free ones) list breaking

changes. SpecShield's job is the *decision*: can I deploy this? — the deploy

gate is the hero tool here.

⚙️ In CI/CD instead of an agent? The specshield CLI runs the same breaking-change and can-i-deploy checks in your pipeline (GitHub Action, exit codes). Same job, two entry points: this server for AI agents, the CLI for CI/CD.

Tools

#	Tool	What it answers
1	`is_change_safe` ⭐	Is this change safe to merge/deploy? Will it break consumers? (`safeToMerge` + risk + blocking reasons)
2	`explain_breaking_changes`	What breaks, developer & consumer impact, suggested migration
3	`generate_migration_guide`	Migration guide (markdown) + safe rollout steps
4	`generate_release_notes`	Release notes for developer / customer / internal
5	`compare_specs`	The raw diff (breaking / additions / modifications / warnings) + risk score
6	`run_governance_review` 🔒	API governance ruleset beyond breaking changes (missing operationId, error responses, security scheme, pagination, versioning…) → located findings + suggested fixes. Paid (Team+)

Tools 1–5 accept specs inline (baseSpecContent / targetSpecContent) or by path (baseSpecPath / targetSpecPath). run_governance_review reviews a single spec (specContent / specPath).

🔒 run_governance_review is a paid feature — a FREE API key returns a payment_required error. Upgrade at specshield.io/pricing.

Full setup, verification & troubleshooting: [docs/mcp-server-setup.md](docs/mcp-server-setup.md).

Install

Requires Node.js ≥ 20 and a SpecShield API key (from specshield.io/account).

npx -y specshield-mcp-server

Claude Desktop

claude_desktop_config.json:

"mcpServers": { "specshield": { "command": "npx", "args": ["-y", "specshield-mcp-server"], "env": { "SPECSHIELD_API_KEY": "ss_your_key_here" } } } }

Claude Code

claude mcp add specshield --env SPECSHIELD_API_KEY=ss_your_key_here -- npx -y specshield-mcp-server

Cursor

~/.cursor/mcp.json (or the project .cursor/mcp.json):

"mcpServers": { "specshield": { "command": "npx", "args": ["-y", "specshield-mcp-server"], "env": { "SPECSHIELD_API_KEY": "ss_your_key_here" } } } }

Configuration

Env var	Required	Default	Purpose
`SPECSHIELD_API_KEY`	yes	—	Your SpecShield API key. Store it as a secret; never commit it.
`SPECSHIELD_API_URL`	no	`https://api.specshield.io`	Backend base URL (override for self-hosted/staging).
`SPECSHIELD_TIMEOUT_MS`	no	`30000`	Per-request timeout.
`SPECSHIELD_LOG_LEVEL`	no	`info`	`debug` \	`info` \	`warn` \	`error` (logs go to stderr).

Example prompts (lead with the deploy gate)

*"Here are my old and new openapi.yaml — is it safe to ship this API change to my consumers?"*
*"Compare v1.yaml and v2.yaml and tell me if I can deploy, and why not."*
*"Explain the breaking changes between these two specs and how consumers should migrate."*
*"Generate customer-facing release notes for this API change."*

Security & privacy

API key required. Sent only as the X-Api-Key header to your configured backend.
Read-only / analyze-only. No mutation tools, no shell execution, no arbitrary file access (a spec file is read only when you explicitly pass a path).
No secret or spec logging. The server never logs spec content, API keys, or request bodies; error messages are redacted and machine-readable.
Specs are sent to your configured SpecShield backend for analysis.

Local development

npm install

npm run build # tsc → dist/ npm test # vitest (no network) npm run lint npm run smoke # boots the server against a stubbed backend and lists tools npm start # run the built server over stdio

Specshield MCP Server

What it does

Install

Install Node.js

Sign up and create a Specshield MCP Server key

Open the Claude desktop app’s settings file

Paste these settings and save the file

Quit Claude and open it again

Try it

What you can do instead

Install Node.js

Sign up and create a Specshield MCP Server key

Open Terminal

Paste this command and press Enter

Type /mcp in Claude Code

Try it

Install Node.js

Sign up and create a Specshield MCP Server key

Click this button to open Cursor

Fill in your key

Open the AI chat in Cursor in Agent mode

Try it

Install Node.js

Sign up and create a Specshield MCP Server key

Click this button to open VS Code

Fill in your key

Open the AI chat in VS Code in Agent mode

Try it

Installed on your computer

Values you fill in

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

SpecShield MCP Server

Tools

Install

Claude Desktop

Claude Code

Cursor

Configuration

Example prompts (lead with the deploy gate)

Security & privacy

Local development

License