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
Pain in the Agent
Overview
Description from the maker (original English)
Remove text watermarks, humanize and check AI writing with your Pain in the Agent account.
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 on your computer
- Transport: stdio
- Category: Other
Install
Pick the AI app you use, then copy the settings.
Before you install
- Basic checks: 1 of 1 passed
- Runs on your computer with your user’s permissions (files, network, apps).
- The registry lists no key to fill in.
Which app do you use?
Pick your app above. We remember it, so next time the button says “Install in …”.
Download the maker’s .mcpb file
The link goes to the maker’s own file; we do not host or repackage it. Open the file and Claude Desktop installs it.
Run this in your terminal
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.
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.
These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
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 7, 2026
- ✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account krllagent, which owns the repo
- … 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 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 0% of the other 18354 servers in this category
- Published to the registry more recently than 72% of the other 18354 servers in this category
- Basic checks equal to or better than 100% of the other 18354 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 Pain in the Agent 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 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 –, and the latest version (0.3.2) reached the registry 17 days ago.
Which apps can use it?
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need MCPB on your computer.
What can I use instead?
In the same category: Spec Driven Development, Remote Desktop Commander, Qemu MCP
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
Qemu MCP
by 0xmortuex
Boot and drive QEMU VMs from an AI agent: keys, screenshots, serial. No guest agent.
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.
Pain in the Agent MCP
Use the Pain in the Agent text tools from an AI client: remove text watermarks, humanize drafts, compare versions or check AI writing. Rewrites use the characters of your account's monthly plan: $5 a month for 100,000 characters, up to 10,000 per text, shared with the website and the remote MCP. Only a successful changed result is charged. Comparisons and AI checks are free and limited to 100 a day; without a plan they take texts of up to 1,000 characters, with it up to 10,000. The website's free tries (3 per browser) do not apply to the API or this client.
The research and examples describe tests of rewrite methods against reference SynthID Text watermarks. Those measurements are separate from the live tool workflow. This client cannot verify Claude or Gemini's private watermark keys. AI writing signals are experimental style observations, not proof of authorship.
Installation
First subscribe and create an API key while signed in; rewrites need the monthly plan on that account. Keep the key in your client's secret settings or environment, outside conversations and source control. You do not need an OpenRouter or OpenAI key.
Claude Desktop
Download the .mcpb file from the latest release, open it in Claude Desktop, and enter the service key in its API key setting. The MCPB bundle contains its Node dependencies. It uses Node.js 22 or later.
Codex
Clone this repository or extract a release. The committed dist/index.cjs is ready to run without npm install. Add this to your Codex MCP configuration, replacing the example absolute path with your checkout:
[mcp_servers.painintheagent]command = "node" args = ["/absolute/path/painintheagent-mcp/dist/index.cjs"] env_vars = ["PAININTHEAGENT_API_KEY", "PAININTHEAGENT_BASE_URL"] startup_timeout_sec = 15 tool_timeout_sec = 40
Set PAININTHEAGENT_API_KEY in the environment that starts Codex. Omit PAININTHEAGENT_BASE_URL for the public service. Restart the client after changing its environment.
A Codex plugin is also included at plugins/painintheagent-mcp/, with a repository marketplace at .agents/plugins/marketplace.json. To add this source, run codex plugin marketplace add krllagent/painintheagent-mcp and select Pain in the Agent from that source in the app. The generated catalog is named personal; it is a repository source, separate from OpenAI's public plugin directory. The plugin forwards the same two environment variables.
Claude Code
Set PAININTHEAGENT_API_KEY in the environment that starts Claude Code. Then use:
/plugin marketplace add krllagent/painintheagent-mcp/plugin install painintheagent-mcp@painintheagent
The plugin includes a rewrite skill and the MCP server. A local checkout can also be loaded with claude --plugin-dir /absolute/path/painintheagent-mcp/claude-plugins/painintheagent-mcp.
Cursor and other local MCP clients
Configure a stdio server with command node and one argument, the absolute path to dist/index.cjs. Supply PAININTHEAGENT_API_KEY through your client's environment or secret setting. Clients have different environment-variable substitution syntax, so use the format your client documents. The MCPB and source release contain the same server.
Tools
| Tool | What it does |
|---|---|
start_rewrite | Starts a watermark-removing rewrite and promptly returns a run_id. Uses characters from the plan. slop_removal is accepted and has no effect. |
start_humanize | Humanizes the text and removes its watermark by replacing the wording throughout, with before-and-after AI scores. Uses characters from the plan. |
start_watermark_comparison | Compares source_text and candidate_text for meaning changes. Free within the daily check limit. Does not detect vendor watermarks. |
start_ai_detection | Scores at least 80 words with a trained AI detector (0–100) and highlights AI-writing patterns. Free within the daily check limit. |
get_result | Reads progress or the saved result for any text tool without starting model work. |
get_rewrite | Returns progress, a saved result with fidelity notes, or an error for that ID. It starts no model work. |
get_limits | Reads the account's character allowance, the per-text limit and when the paid month ends. |
Ask your agent to use the tool you need and show its source notes or quoted style evidence. Keep the client open while it works; deep rewriting can take several minutes. The local MCP process holds the streaming connection. Closing it can interrupt the run. The separate remote MCP endpoint at https://painintheagent.com/mcp supports OAuth and continues queued jobs after disconnecting.
Save the request ID. If the stream fails, use get_result with that same ID. The earlier get_rewrite name still works. The client never automatically retries a POST. Reusing an ID with the same operation and input retrieves that run; a different operation, candidate or option is rejected. Failed runs use no characters. Pending requests reserve their characters until they finish or reach the server's deadline, and their IDs cannot start fresh work.
Privacy and gateways
Only supplied text is sent. This client does not read your files, save prose to disk, or emit telemetry. The hosted service sends prose to its model provider and stores source text and results as described in the privacy policy. Your MCP host may retain tool inputs and outputs under its own settings. Do not submit secrets or confidential personal data.
The client reads PAININTHEAGENT_API_KEY and optional PAININTHEAGENT_BASE_URL. The default base URL is https://painintheagent.com. A configured gateway receives every request; there is no credential or endpoint fallback. HTTP is accepted only for localhost gateways. Authentication uses a bearer header, and redirects are rejected.
Development
npm ci --ignore-scriptsnpm run build npm test node scripts/package.mjs
The tests use fictional text and a local fake HTTP service. They cover endpoint selection, failed authentication, request reuse, dropped streams, and a fresh bundled installation speaking MCP over stdio. They do not call a paid model or claim to be live-provider validation.
See the API reference and distribution status. The client is MIT-licensed. The hosted service and research have their own terms and evidence.