capx café

Name: capx café
Author: vb-tyagi

by vb-tyagiversion 0.1.3i★ 0iRuns on your computer

Registry nameio.github.vb-tyagi/capx-cafe

How to install

What it does

Agent-native X (Twitter) posting as one MCP server; every post clears a server-side guardrail.

Connects Runs on your computer
Account or key No key needed · 3 settings to fill in (CAPX_CHOKEPOINT_URL, CAPX_EMAIL, X_CLIENT_ID)
Category Marketing & social media

Install

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

Passed 3/3 checks · Runs on your computer · ✓ Commands checked Nov 14, 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, with some setup first

3 setting(s) to fill in (CAPX_CHOKEPOINT_URL, CAPX_EMAIL, X_CLIENT_ID) · Install Node.js on your computer first (one time) · Only the Claude desktop app (Windows or Mac), not the web or phone

Let AI install it

Copy this message into a Claude chat. The AI checks your computer, tells you which file it will change, and waits for your OK every time.

Please install the MCP server capx café for Claude on this computer, in this order: 1) Check Node.js with node -v. If it is missing, tell me to install it from https://nodejs.org/en/download; do not install it yourself. 2) Use only this config (already checked by PopNx MCP): { "mcpServers": { "capx-cafe": { "command": "npx", "args": [ "-y", "capx-cafe" ], "env": { "CAPX_CHOKEPOINT_URL": "your-value", "CAPX_EMAIL": "your-value", "X_CLIENT_ID": "your-value" } } } } 3) Tell me the full path of the file you will change, or the command you will run, and wait for my OK. 4) For CAPX_CHOKEPOINT_URL, CAPX_EMAIL, X_CLIENT_ID, leave "your-value" in place and tell me to paste the real value myself into the file or the app’s field. Never ask me to type a key in chat. 5) Do what we agreed, then check that the capx café tools really show up.

This message has no key in it. If a key is needed, the AI will ask you to paste it yourself into the file or the app’s field.

1
Install Node.js (if you don’t have it)
Already installed? Check first · Open Terminal, type this command and press Enter
node -v
- A version number such as v26.13.1 = installed, skip this step
- "command not found" (on Windows: "is not recognized") = not installed yet, or installed but Terminal needs to be closed and reopened
How to open Terminal
Mac: press ⌘ + Space, type Terminal, press Enter
Windows: open Start, type Windows PowerShell, then Open
Not installed: Open the official download page, pick the LTS version and the click-through installer: .pkg on Mac · .msi on Windows. Double-click and follow it to the end. No curl command needed
Open the Node.js download page ↗
When it’s done, close Terminal, open it again and run the same command. You should see a version number: node -v
Install once; it works for everything that needs Node.js
Done
2
Fill in 3 setting(s)
These are program settings, not keys. No sign-up needed; fill them in as the maker describes.
- CAPX_CHOKEPOINT_URL URL of the hosted capx chokepoint that enforces the server-side guardrail on every post
- CAPX_EMAIL Whitelisted user email used to authenticate to the chokepoint
- X_CLIENT_ID X (Twitter) OAuth client ID; required only on the BYO lane
Descriptions are as written by the maker.
Done
Open the Claude desktop app’s settings file
SettingsDeveloperEdit Config
Done

Paste these settings and save the file

{
  "mcpServers": {
    "capx-cafe": {
      "command": "npx",
      "args": [
        "-y",
        "capx-cafe"
      ],
      "env": {
        "CAPX_CHOKEPOINT_URL": "your-value",
        "CAPX_EMAIL": "your-value",
        "X_CLIENT_ID": "your-value"
      }
    }
  }
}

Done

Quit Claude and open it again
Done
Try it
Use capx café and tell me what you can do for me, then show me one thing
✓ If Claude says it is using capx café or shows a capx café tool in the answer, you are connected

1 optional setting(s) (works without them)

The command above works without these. Add them only if you want to change something, following the maker’s description.

CAPX_LANE Connection lane: 'byo' (bring your own X app) or 'capx-app' (capx-managed app)

Descriptions are as written by the maker.

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

ChatGPT cannot connect capx café yet

capx café 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 capx café

Steps for Claude →3 setting(s) to fill in (CAPX_CHOKEPOINT_URL, CAPX_EMAIL, X_CLIENT_ID) · 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 →3 setting(s) to fill in (CAPX_CHOKEPOINT_URL, CAPX_EMAIL, X_CLIENT_ID) · Install Node.js on your computer first (one time)
Steps for Cursor →3 setting(s) to fill in (CAPX_CHOKEPOINT_URL, CAPX_EMAIL, X_CLIENT_ID) · Install Node.js on your computer first (one time)
Steps for VS Code →3 setting(s) to fill in (CAPX_CHOKEPOINT_URL, CAPX_EMAIL, X_CLIENT_ID) · Install Node.js on your computer first (one time)

B · Others in Marketing & social media that work with ChatGPT

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

Google Ads + Meta Ads + SEO/GEO MCP✓ ChatGPT
Cargo✓ ChatGPT
NotFair✓ ChatGPT

Works with Claude Code, with some setup first

3 setting(s) to fill in (CAPX_CHOKEPOINT_URL, CAPX_EMAIL, X_CLIENT_ID) · Install Node.js on your computer first (one time)

Let AI install it

Copy this message into a Claude Code chat. The AI checks your computer, tells you which file it will change, and waits for your OK every time.

Please install the MCP server capx café for Claude Code on this computer, in this order: 1) Check Node.js with node -v. If it is missing, tell me to install it from https://nodejs.org/en/download; do not install it yourself. 2) Use only this config (already checked by PopNx MCP): claude mcp add --scope user capx-cafe --env CAPX_CHOKEPOINT_URL=your-value --env CAPX_EMAIL=your-value --env X_CLIENT_ID=your-value -- npx -y capx-cafe 3) Tell me the full path of the file you will change, or the command you will run, and wait for my OK. 4) For CAPX_CHOKEPOINT_URL, CAPX_EMAIL, X_CLIENT_ID, leave "your-value" in place and tell me to paste the real value myself into the file or the app’s field. Never ask me to type a key in chat. 5) Do what we agreed, then check that the capx café tools really show up.

This message has no key in it. If a key is needed, the AI will ask you to paste it yourself into the file or the app’s field.

1
Install Node.js (if you don’t have it)
Already installed? Check first · Open Terminal, type this command and press Enter
node -v
- A version number such as v26.13.1 = installed, skip this step
- "command not found" (on Windows: "is not recognized") = not installed yet, or installed but Terminal needs to be closed and reopened
How to open Terminal
Mac: press ⌘ + Space, type Terminal, press Enter
Windows: open Start, type Windows PowerShell, then Open
Not installed: Open the official download page, pick the LTS version and the click-through installer: .pkg on Mac · .msi on Windows. Double-click and follow it to the end. No curl command needed
Open the Node.js download page ↗
When it’s done, close Terminal, open it again and run the same command. You should see a version number: node -v
Install once; it works for everything that needs Node.js
Done
2
Fill in 3 setting(s)
These are program settings, not keys. No sign-up needed; fill them in as the maker describes.
- CAPX_CHOKEPOINT_URL URL of the hosted capx chokepoint that enforces the server-side guardrail on every post
- CAPX_EMAIL Whitelisted user email used to authenticate to the chokepoint
- X_CLIENT_ID X (Twitter) OAuth client ID; required only on the BYO lane
Descriptions are as written by the maker.
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 capx-cafe --env CAPX_CHOKEPOINT_URL=your-value --env CAPX_EMAIL=your-value --env X_CLIENT_ID=your-value -- npx -y capx-cafe

Done

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

1 optional setting(s) (works without them)

The command above works without these. Add them only if you want to change something, following the maker’s description.

CAPX_LANE Connection lane: 'byo' (bring your own X app) or 'capx-app' (capx-managed app)

Descriptions are as written by the maker.

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

3 setting(s) to fill in (CAPX_CHOKEPOINT_URL, CAPX_EMAIL, X_CLIENT_ID) · Install Node.js on your computer first (one time)

Let AI install it

Copy this message into a Cursor chat. The AI checks your computer, tells you which file it will change, and waits for your OK every time.

Please install the MCP server capx café for Cursor on this computer, in this order: 1) Check Node.js with node -v. If it is missing, tell me to install it from https://nodejs.org/en/download; do not install it yourself. 2) Use only this config (already checked by PopNx MCP): { "mcpServers": { "capx-cafe": { "command": "npx", "args": [ "-y", "capx-cafe" ], "env": { "CAPX_CHOKEPOINT_URL": "your-value", "CAPX_EMAIL": "your-value", "X_CLIENT_ID": "your-value" } } } } 3) Tell me the full path of the file you will change, or the command you will run, and wait for my OK. 4) For CAPX_CHOKEPOINT_URL, CAPX_EMAIL, X_CLIENT_ID, leave "your-value" in place and tell me to paste the real value myself into the file or the app’s field. Never ask me to type a key in chat. 5) Do what we agreed, then check that the capx café tools really show up.

This message has no key in it. If a key is needed, the AI will ask you to paste it yourself into the file or the app’s field.

1
Install Node.js (if you don’t have it)
Already installed? Check first · Open Terminal, type this command and press Enter
node -v
- A version number such as v26.13.1 = installed, skip this step
- "command not found" (on Windows: "is not recognized") = not installed yet, or installed but Terminal needs to be closed and reopened
How to open Terminal
Mac: press ⌘ + Space, type Terminal, press Enter
Windows: open Start, type Windows PowerShell, then Open
Not installed: Open the official download page, pick the LTS version and the click-through installer: .pkg on Mac · .msi on Windows. Double-click and follow it to the end. No curl command needed
Open the Node.js download page ↗
When it’s done, close Terminal, open it again and run the same command. You should see a version number: node -v
Install once; it works for everything that needs Node.js
Done
2
Fill in 3 setting(s)
These are program settings, not keys. No sign-up needed; fill them in as the maker describes.
- CAPX_CHOKEPOINT_URL URL of the hosted capx chokepoint that enforces the server-side guardrail on every post
- CAPX_EMAIL Whitelisted user email used to authenticate to the chokepoint
- X_CLIENT_ID X (Twitter) OAuth client ID; required only on the BYO lane
Descriptions are as written by the maker.
Done
Click this button to open Cursor
Open in Cursor
Cursor asks you to confirm; click Install
Done
Fill in your key
In the capx café settings, CAPX_CHOKEPOINT_URL, CAPX_EMAIL, X_CLIENT_ID is empty; add your key and save
Done
Open the AI chat in Cursor in Agent mode
Done
Try it
Use capx café and tell me what you can do for me, then show me one thing
✓ If Cursor says it is using capx café or shows a capx café tool in the answer, you are connected

1 optional setting(s) (works without them)

The command above works without these. Add them only if you want to change something, following the maker’s description.

CAPX_LANE Connection lane: 'byo' (bring your own X app) or 'capx-app' (capx-managed app)

Descriptions are as written by the maker.

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

3 setting(s) to fill in (CAPX_CHOKEPOINT_URL, CAPX_EMAIL, X_CLIENT_ID) · Install Node.js on your computer first (one time)

Let AI install it

Copy this message into a VS Code chat. The AI checks your computer, tells you which file it will change, and waits for your OK every time.

Please install the MCP server capx café for VS Code on this computer, in this order: 1) Check Node.js with node -v. If it is missing, tell me to install it from https://nodejs.org/en/download; do not install it yourself. 2) Use only this config (already checked by PopNx MCP): { "servers": { "capx-cafe": { "type": "stdio", "command": "npx", "args": [ "-y", "capx-cafe" ], "env": { "CAPX_CHOKEPOINT_URL": "your-value", "CAPX_EMAIL": "your-value", "X_CLIENT_ID": "your-value" } } } } 3) Tell me the full path of the file you will change, or the command you will run, and wait for my OK. 4) For CAPX_CHOKEPOINT_URL, CAPX_EMAIL, X_CLIENT_ID, leave "your-value" in place and tell me to paste the real value myself into the file or the app’s field. Never ask me to type a key in chat. 5) Do what we agreed, then check that the capx café tools really show up.

This message has no key in it. If a key is needed, the AI will ask you to paste it yourself into the file or the app’s field.

1
Install Node.js (if you don’t have it)
Already installed? Check first · Open Terminal, type this command and press Enter
node -v
- A version number such as v26.13.1 = installed, skip this step
- "command not found" (on Windows: "is not recognized") = not installed yet, or installed but Terminal needs to be closed and reopened
How to open Terminal
Mac: press ⌘ + Space, type Terminal, press Enter
Windows: open Start, type Windows PowerShell, then Open
Not installed: Open the official download page, pick the LTS version and the click-through installer: .pkg on Mac · .msi on Windows. Double-click and follow it to the end. No curl command needed
Open the Node.js download page ↗
When it’s done, close Terminal, open it again and run the same command. You should see a version number: node -v
Install once; it works for everything that needs Node.js
Done
2
Fill in 3 setting(s)
These are program settings, not keys. No sign-up needed; fill them in as the maker describes.
- CAPX_CHOKEPOINT_URL URL of the hosted capx chokepoint that enforces the server-side guardrail on every post
- CAPX_EMAIL Whitelisted user email used to authenticate to the chokepoint
- X_CLIENT_ID X (Twitter) OAuth client ID; required only on the BYO lane
Descriptions are as written by the maker.
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 capx café settings, CAPX_CHOKEPOINT_URL, CAPX_EMAIL, X_CLIENT_ID is empty; add your key and save
Done
Open the AI chat in VS Code in Agent mode
Done
Try it
Use capx café and tell me what you can do for me, then show me one thing
✓ If VS Code says it is using capx café or shows a capx café tool in the answer, you are connected

1 optional setting(s) (works without them)

The command above works without these. Add them only if you want to change something, following the maker’s description.

CAPX_LANE Connection lane: 'byo' (bring your own X app) or 'capx-app' (capx-managed app)

Descriptions are as written by the maker.

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 capx café💬 Discussion →

For developers: Terminal commands and JSON settings

Installed on your computer

Claude Code

claude mcp add --scope user capx-cafe --env CAPX_CHOKEPOINT_URL=your-value --env CAPX_EMAIL=your-value --env X_CLIENT_ID=your-value -- npx -y capx-cafe

Claude Desktop (claude_desktop_config.json)

{
  "mcpServers": {
    "capx-cafe": {
      "command": "npx",
      "args": [
        "-y",
        "capx-cafe"
      ],
      "env": {
        "CAPX_CHOKEPOINT_URL": "your-value",
        "CAPX_EMAIL": "your-value",
        "X_CLIENT_ID": "your-value"
      }
    }
  }
}

Cursor (~/.cursor/mcp.json)

{
  "mcpServers": {
    "capx-cafe": {
      "command": "npx",
      "args": [
        "-y",
        "capx-cafe"
      ],
      "env": {
        "CAPX_CHOKEPOINT_URL": "your-value",
        "CAPX_EMAIL": "your-value",
        "X_CLIENT_ID": "your-value"
      }
    }
  }
}

VS Code (mcp.json)

{
  "servers": {
    "capx-cafe": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "capx-cafe"
      ],
      "env": {
        "CAPX_CHOKEPOINT_URL": "your-value",
        "CAPX_EMAIL": "your-value",
        "X_CLIENT_ID": "your-value"
      }
    }
  }
}

Values you fill in

CAPX_CHOKEPOINT_URL required env
URL of the hosted capx chokepoint that enforces the server-side guardrail on every post
CAPX_EMAIL required env
Whitelisted user email used to authenticate to the chokepoint
CAPX_LANE env
Connection lane: 'byo' (bring your own X app) or 'capx-app' (capx-managed app)
X_CLIENT_ID required env
X (Twitter) OAuth client ID; required only on the BYO lane

Descriptions are as written by the maker.

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: 48/wk
Licence i: AGPL-3.0
Connection: Runs on your computer
Transport: stdio
Latest versioni: 0.1.3
Categoryi: Marketing & social media
Published to registryi: Sep 3, 2026
Code last changedi: Sep 17, 2026
Maker: vb-tyagi
Packages: npm: capx-cafe
Repo: vb-tyagi/capx-cafe
Website: capx-cafe.vercel.app
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 15, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account vb-tyagi, which owns the repo
✓ Pass
Still maintained
Code last changed 2 months ago
✓ Pass
Has a licence
Uses AGPL-3.0
– 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

Published vulnerabilities (OSV.dev)

Not checked yet

What we check → · JSON

Makers: ask for a re-check or report wrong info

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 Marketing & social mediai

More stars than 0% of the other 3963 servers in this category
Published to the registry more recently than 26% of the other 3963 servers in this category
Basic checks equal to or better than 100% of the other 3963 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 capx café safe?

It passed 3 of 3 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 2 months ago, and the latest version (0.1.3) reached the registry 2 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: Relaticle, ChatbotX, X (Twitter) MCP Server by Xquik, Betterlytics, BibiGPT YouTube Video Summarizer

Similar alternatives

Same category, other makers, commands already checked. Official ones first, then by stars.

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

Relaticle

Open-source CRM your AI agents can write to: companies, people, opportunities, tasks and notes.

by relaticleGrowing★ 1.8KUpdated 2 days ago

Runs in the cloud✓ service owner · relaticle.com

How to connect

ChatbotX

Omnichannel customer messaging, CRM contacts, flows, sequences, broadcasts, and AI automation.

by ChatbotXIOGrowing★ 1.1K Stars for the whole repoUpdated 9 days ago

Runs in the cloud✓ service owner · chatbotx.io

How to connect

X (Twitter) MCP Server by Xquik

Xquik is the world's fastest and cheapest X (Twitter) data API with the most complete X data.

by Xquik-devGrowing★ 229Updated 3 days ago

Runs in the cloud✓ xquik.com

How to connect

Betterlytics

Query your Betterlytics web analytics from AI agents: traffic, funnels, journeys, errors, uptime.

by betterlyticsGrowing★ 180Updated 3 months ago

Runs in the cloud✓ service owner · betterlytics.io

How to connect

BibiGPT YouTube Video Summarizer

AI video summarizer: summarize and transcribe YouTube, Bilibili, TikTok and podcast videos.

by JimmyLvGrowing★ 141Updated 18 days ago

Runs in the cloud✓ service owner · bibigpt.co

How to connect

Relaticle — Runs in the cloud, nothing to install · No key needed
ChatbotX — Runs in the cloud, nothing to install · No key needed
X (Twitter) MCP Server by Xquik — Runs in the cloud, nothing to install · No key needed
Betterlytics — Runs in the cloud, nothing to install · Needs a key
BibiGPT YouTube Video Summarizer — Runs in the cloud, nothing to install · No key needed

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.

capx café

The safe way to let your AI run your X.

One MCP server. Your X token never touches the agent — and every post clears an enforced guardrail before it ships.

*The guardrail, live — every verdict above is produced by the real chokepoint code (pnpm demo replays it).*

capx café is an agent-native X poster that installs as one MCP server into any coding agent (Claude Code /

Cursor / Codex / Windsurf). A whitelisted user connects their X account once; after that they create /

schedule / post from inside their agent session. The whole product rests on one security thesis: the X

token, the guardrail (casserole), and the send are one inseparable server-side unit — the agent on

your laptop only ever holds a short-TTL session handle, never the token. That's why it structurally can't be

prompt-injected into tweeting a scam. "The AI writes; casserole decides what ships."

Why it's different

Every other "let your AI post" tool has the same flaw: to let an agent post, you paste your X token into a plaintext config right next to an autonomous agent that reads untrusted web pages, issues, and code. One prompt-injection and your account tweets a scam. capx café is the only one that structurally can't be.

🔒 Your X token never touches your machine. OAuth completes on capx café's hosted callback; the token lives encrypted in a server-side vault. Your agent holds only a short-TTL, revocable session handle.
🛡️ casserole — a *deterministic (non-AI)* six-layer guardrail — runs server-side at the only door to X and checks every post. A blocked post never even decrypts your token (proven by an adversarial test suite).
🔗 The token, the guard, and the send are one unit. Skip the plugin and call the server directly — you still hit the guard. The client's checks are cosmetic; the server's are load-bearing.
✍️ capx generates nothing. *Your* agent's model writes; capx ships what clears the guard.

→ Full threat model, architecture & the "what we can/can't see" table: [docs/SECURITY.md](docs/SECURITY.md)

How it works

flowchart LR

subgraph M["🖥️ your machine · untrusted"] A["agent model writes the draft"] S["capx skills"] C["capx MCP client holds a session handle · NO token"] end subgraph K["🔒 capx chokepoint · hosted · AGPL-3.0"] AD["admission allowlist · kill-switch"] CAS["casserole 6-layer guardrail"] V["vault the token lives here"] XA["x-adapter the only egress"] end X["🐦 X · /2/tweets"] A --> C S --> C C -->|"short-TTL handle crosses — never the token"| AD AD --> CAS CAS -->|PASS| V --> XA --> X CAS -.->|blocked / held| C

The token, the guardrail, and the send live together behind a trust boundary; your agent can only *ask*.

The guardrail: casserole

Six deterministic layers on every post. Worst result wins — pass / rewrite / hold / block — and a blocked post never even decrypts the token.

flowchart TD

D["draft"] --> AD{"admitted? allowlisted · not killed"} AD -->|no| R["rejected"] AD -->|yes| CAS["casserole L1 eligibility · L2 rate · L3 anti-slop L4 authenticity · L5 kill-switch · L6 audit"] CAS --> VER{"verdict"} VER -->|block| B["blocked — never sent 🔒 token never decrypted"] VER -->|hold| H["held for your review"] VER -->|rewrite| RW["ask the agent to fix"] VER -->|pass| SEND["vault → x-adapter → X ✅"]

60-second quickstart

npx -y capx-cafe          # runs the MCP server — add it to your agent's MCP config

Then, inside your agent:

"connect my X account"              → opens a browser once; the token stays on the server

"post: shipping the thing today" → clears casserole, or tells you exactly why not "turn my last week of commits into a build-in-public thread" → drafts + queues it

Set CAPX_EMAIL (your whitelisted email) and, for the BYO lane, X_CLIENT_ID (your own X app) in ~/.capx/config.json or your agent's MCP env. A guided setup page hands you the exact callback URL to paste.

Install matrix

Agent	How
Claude Code	`/plugin marketplace add vb-tyagi/capx-cafe` → `/plugin install capx-cafe` (MCP + slash commands + skills)
Cursor	add to `.cursor/mcp.json`; skill rules in `plugins/capx-cafe/adapters/cursor/`
Codex	add to your MCP config; prompt pack in `plugins/capx-cafe/adapters/codex/`
Windsurf	add to MCP config; workflows in `plugins/capx-cafe/adapters/windsurf/`
Any MCP agent	point it at `npx -y capx-cafe`
Docker Desktop	`docker mcp catalog pull ghcr.io/vb-tyagi/capx-catalog:latest` → MCP Toolkit → enable capx café

What your agent can do

Tool	What it does
`connect_x`	One-time browser OAuth — the token lands in the server vault, never on your machine
`post_now`	Post now (clears casserole first). Supports reply-chains and media
`preview`	Dry-run a draft through the guardrail without sending — pass / hold / block + why
`audit`	The durable record of what capx posted or attempted on your behalf, and its state
`create_loop` · `list_loops` · …	Scheduled posting — a queue you wrote, sent on a schedule, laptop-off
`upload_media`	Stream a local image/video to X and attach it (media you made with your own tools)
`whoami`	The connected account + its status

Skills — your work becomes your content

capx lives inside a *coding* agent, so it has what no social scheduler does: your repo, commits, PRs, releases. Skills turn that into posts — automatically, and always through the guardrail.

flowchart LR

The self-refilling content engine: you code → commits accrue → the loop drains as it posts → gap-alert tops it up from the *new* commits. Your normal work *is* the pipeline.

🏆 build-in-public · ship-note · changelog-thread · repurpose (blog/README → thread) · launch-thread · til · fix-note
voice-match (sound like you) · draft-review (lint against the guard) · thread-builder · hook-rewrite
best-time · cadence-planner · gap-alert · audit-trail · connection-health · quickstart · self-host-guide
Media directors — image-director, video-director, prompt-engine, model-guide: capx runs no models; it guides *your* image/video tools (higgsfield, fal, kling, …) and uploads the result. casserole guards your caption; you own the media.

*One canonical SKILL.md per skill, generated for all four agents. capx never writes the content — it makes good content easy and stops bad content regardless of which skill produced it.*

Two lanes

BYO — bring your own X developer app. You're X's customer and pay X directly — since Feb 2026 that means pre-loading credits (no free X tier for new apps) at ~$0.015/post, $0.20 if the post contains a link. Free on capx café's side; heavy users can self-host the identical image.
capx-app (creator lane) — post through capx café's shared X app, no developer account needed. Opening as a paid beta (waitlist): Short $5 / Tall $15 / Grande $35 monthly tiers + top-up packs, quotas enforced server-side at the gate. Full sheet + the math: [docs/ECONOMICS.md](docs/ECONOMICS.md) · policy posture: docs/X-COMPLIANCE.md.

Self-host

The chokepoint is open source (AGPL-3.0). Run the identical image with your own X app, keys, database, and domain — CAPX_DEPLOY_MODE=self-host, zero telemetry to capx. See the self-host-guide skill and docs/HANDOFF.md.

Licensing

MIT for the client and everything it bundles (apps/capx-mcp, core, config, platform-client) plus skills & docs. AGPL-3.0 for the server half (the chokepoint + casserole/captain/counter/canteen/ chef). Full map: [LICENSING.md](LICENSING.md).

Status

Private alpha, whitelist-only. The first real post shipped 2026-07-19 — guardrail-cleared, token never on the machine. Not yet open for public signups.

Dev

Node ≥ 22.6 (TypeScript runs natively via --experimental-strip-types — no build step). pnpm run verify = unit tests across packages / services / apps + tsc. Contributions accepted under the project CLA.

capx café · security · architecture · license

capx café

What it does

Install

Install Node.js (if you don’t have it)

Fill in 3 setting(s)

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 (if you don’t have it)

Fill in 3 setting(s)

Open Terminal

Paste this command and press Enter

Type /mcp in Claude Code

Try it

Install Node.js (if you don’t have it)

Fill in 3 setting(s)

Click this button to open Cursor

Fill in your key

Open the AI chat in Cursor in Agent mode

Try it

Install Node.js (if you don’t have it)

Fill in 3 setting(s)

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

Published vulnerabilities (OSV.dev)

Discussion

User reviews

Compared with others in Marketing & social mediai

Common questions

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README from the maker

capx café

The safe way to let your AI run your X.

Why it's different

How it works

The guardrail: casserole

60-second quickstart

Install matrix

What your agent can do

Skills — your work becomes your content

Two lanes

Self-host

Licensing

Status

Dev