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PopNx MCPMCP servers for people who use AI · explained in plain words

writ

by AvenueDAdminversion 0.1.2i★ 2iRuns on your computer
Registry nameio.github.AvenueDAdmin/writ

Install

Overview

Description from the maker (original English)

Commit-time policy checks for AI agent writes (ALLOW/DENY/STEP_UP) with a tamper-evident audit log.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

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 on your computer
  • Transport: stdio
  • Category: Other
  • You need to fill in: WRIT_API_KEY, WRIT_SPONSOR_TOKEN

Install

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

Before you install

  • Basic checks: 2 of 2 passed
  • Runs on your computer with your user’s permissions (files, network, apps).
  • You fill in yourself: WRIT_API_KEY, WRIT_SPONSOR_TOKEN, WRIT_BASE_URL

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

Which app do you use?

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "writ": {
      "command": "uvx",
      "args": [
        "writ-mcp"
      ],
      "env": {
        "WRIT_API_KEY": "your-value",
        "WRIT_SPONSOR_TOKEN": "your-value",
        "WRIT_BASE_URL": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add writ --env WRIT_API_KEY=your-value --env WRIT_SPONSOR_TOKEN=your-value --env WRIT_BASE_URL=your-value -- uvx writ-mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "writ": {
      "command": "uvx",
      "args": [
        "writ-mcp"
      ],
      "env": {
        "WRIT_API_KEY": "your-value",
        "WRIT_SPONSOR_TOKEN": "your-value",
        "WRIT_BASE_URL": "your-value"
      }
    }
  }
}

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.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "writ": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "writ-mcp"
      ],
      "env": {
        "WRIT_API_KEY": "your-value",
        "WRIT_SPONSOR_TOKEN": "your-value",
        "WRIT_BASE_URL": "your-value"
      }
    }
  }
}

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.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

  • WRIT_API_KEY secret required env
    Writ API key (get one free at https://withwrit.com)
  • WRIT_SPONSOR_TOKEN secret env
    Writ sponsor token, only required for sponsor tools (grant, revoke, reinstate)
  • WRIT_BASE_URL env
    Optional custom Writ API base URL (default: https://api.withwrit.com)

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

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

ClaudeGooseLM StudioMsty StudioCherry StudioCursorVS Code + GitHub CopilotVisual StudioWindsurf (Devin Desktop)ZedKiroClineContinueJetBrains AI AssistantClaude CodeCodex CLIGemini CLIOpenCodenodecodeWarpLibreChatRaycast

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 10, 2026

  • ✓ Pass

    Maker matches the repo

    The registry name was verified with the GitHub account AvenueDAdmin, which owns the repo

  • ✓ Pass

    Still maintained

    Code last changed yesterday

  • … 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

Compared with others in Otheri

  • More stars than 89% of the other 19098 servers in this category
  • Published to the registry more recently than 52% of the other 19098 servers in this category
  • Basic checks equal to or better than 100% of the other 19098 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 writ 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: WRIT_API_KEY, WRIT_SPONSOR_TOKEN

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 yesterday, and the latest version (0.1.2) reached the registry 41 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Python (uv) on your computer.

What can I use instead?

In the same category: World Monitor, Claude Flow, Tldraw

Alternatives

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

World Monitor

Real-time global intelligence on conflict, markets, energy, trade, shipping and cyber. 102 tools.

by koala73Widely used★ 90.4KUpdated 5 days ago

Runs in the cloud✓ worldmonitor.app

Claude Flow

AI orchestration with hive-mind swarms, neural networks, and 87 MCP tools for enterprise dev.

by ruvnetWidely used↓ 13.5K/wk★ 81.4KUpdated 14 months ago

Runs on your computer

Tldraw

Draw and visually collaborate with your agents on tldraw's canvas.

by tldrawWidely used★ 51.4KUpdated 8 months ago

Runs in the cloud

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.

writ-mcp

The Writ gate as an MCP server. Give any MCP-compatible agent point-of-action control: the agent calls Writ before a consequential write, gets back ALLOW, DENY, or STEP_UP, and every outcome creates an audit receipt.

Install

pip install writ-mcp

Requires Python 3.9+. Installs the writ-mcp command (stdio transport).

Configure

export WRIT_API_KEY="writ_..."        # required; get one free: POST /v1/keys with an email

export WRIT_SPONSOR_TOKEN="..." # only for sponsor tools (grant, revoke, reinstate)

export WRIT_BASE_URL="..." # default: https://api.withwrit.com

Add to your agent

Claude Code:

claude mcp add writ --env WRIT_API_KEY="$WRIT_API_KEY" -- writ-mcp

Claude Desktop (claude_desktop_config.json):

{

"mcpServers": { "writ": { "command": "writ-mcp", "env": { "WRIT_API_KEY": "writ_..." } } } }

Any MCP client (generic stdio config):

{

"command": "writ-mcp", "env": { "WRIT_API_KEY": "writ_...", "WRIT_SPONSOR_TOKEN": "writ_sp_..." } }

Hermes (NousResearch/hermes-agent) catalog entry — once published, this package is installable from the optional-mcps catalog:

hermes mcp install writ

The check-before-write loop

The tool descriptions teach the agent this flow, but the short version:

  1. writ_check(sponsor_id, agent_id, verb, target, purpose) — before the write.
  2. ALLOW → you get a 90-second authToken bound to that exact write.
  3. writ_verify_token(auth_token, verb, target, purpose) — immediately before executing, to prove the authorization still matches what you're doing.
  4. DENY → do not proceed. STEP_UP → a human sponsor approves (via writ_grant or the dashboard), then check again.

Tools

ToolWhoWhat
writ_checkagentDecision + 90s purpose-bound token
writ_verify_tokenagentPoint-of-action token verification
writ_grantsponsorApprove a STEP_UP (one-time grant)
writ_revoke / writ_reinstatesponsorKill switch on/off for a principal
writ_receiptsagentAudit trail of decisions
writ_policyagentTenant verb policy
writ_sandboxanyoneFree 90-second demo grant, no key needed
writ_github_installationsadminList connected GitHub App installations
writ_github_set_thresholdadminSet the check-run fail threshold per install
writ_github_toggle_pr_commentsadminEnable/disable the PR-comment bot
writ_manifestsagentList repos with risk profiles or fetch one manifest
writ_explain_receiptagentExplain a receipt in plain language
writ_tenant_notifyadminGet or update step-up notification settings
writ_principalsadminList the tenant's principals
writ_verbsadminList the tenant's verb vocabulary
writ_keysadminList API key metadata

Try it with no key: writ_sandbox → writ_check with verb="demo_write".

Source

Public repo: withwrit/pywrit (mcp/ directory). License: MIT.

Directory listings: Glama · MCP Registry io.github.withwrit/writ.

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