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

loop-mcp

by loopxxi.comversion 2.4.0i★ –iRuns in the cloud
Registry namecom.loopxxi/loop-mcp

How to install

Overview

Description from the maker (original English)

15 pay-per-call Bitcoin and developer tools, paid in sats over Lightning (L402).

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: Crypto & blockchain

Install

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

Passed 2/3 checks · What you ask goes through the maker’s server (mcp.loopxxi.com)

First: which AI do you use?

Pick your app and the steps appear below.

Works with Claude · about 2 min

No key, nothing to install · Set it up once on claude.ai or the desktop app, then use it in chat · free accounts can add 1

  1. Open Claude’s Connectors page

    CustomizeConnectors

    CustomizeConnectors1+ Add2https://…3Add4
  2. Click “+ Add” → “Add custom connector” and fill in these 2 fields

    Copy each value into the field with the same name in Claude, then click Continue

    Name · Nameloop-mcp
    Remote MCP server URL · Addresshttps://mcp.loopxxi.com/mcp

    Leave Authentication as Claude detected it, then click Add

  3. Turn it on in a chat

    +Connectorsloop-mcp

  4. Try it

    Use loop-mcp and tell me what you can do for me, then show me one thing

    ✓ If Claude says it is using loop-mcp or shows a loop-mcp 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 ChatGPT on business plans only

ChatGPT Business, Enterprise or Edu on the web, added by a workspace admin or owner · On Free, Plus or Pro: your ChatGPT plan cannot connect MCP yet

  1. Open ChatGPT’s add-MCP page on the web

    Plugins+Add custom MCP server

    ChatGPTPlugins1+2https://…3Create4
  2. Fill in the name and address

    Enter a name, paste the address under Connection, tick the risk warning and click Create as a plugin

    Name · Nameloop-mcp
    Connection · Addresshttps://mcp.loopxxi.com/mcp
  3. Pick loop-mcp in a chat

    Start a new chat and pick loop-mcp from your plugins before typing

  4. Try it

    Use loop-mcp and tell me what you can do for me, then show me one thing

    ✓ If ChatGPT says it is using loop-mcp or shows a loop-mcp tool in the answer, you are connected

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

Works with Claude Code · about 2 min

No key, nothing to install

  1. Open Terminal

    Mac: press Command+Space and type Terminal · Windows: open PowerShell

  2. Paste this command and press Enter

    claude mcp add --transport http loop https://mcp.loopxxi.com/mcp
  3. Type /mcp in Claude Code

    You should see loop-mcp listed as connected

  4. Try it

    Use loop-mcp and tell me what you can do for me, then show me one thing

    ✓ If Claude Code says it is using loop-mcp or shows a loop-mcp 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 · about 2 min

No key, nothing to install

  1. Click this button to open Cursor

    Open in Cursor

    Cursor asks you to confirm; click Install

  2. Open the AI chat in Cursor in Agent mode

  3. Try it

    Use loop-mcp and tell me what you can do for me, then show me one thing

    ✓ If Cursor says it is using loop-mcp or shows a loop-mcp 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 · about 2 min

No key, nothing to install

  1. Click this button to open VS Code

    Open in VS Code

    VS Code asks you to confirm; click Install

  2. Open the AI chat in VS Code in Agent mode

  3. Try it

    Use loop-mcp and tell me what you can do for me, then show me one thing

    ✓ If VS Code says it is using loop-mcp or shows a loop-mcp 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 →

Address for apps that connect over the web

Addresshttps://mcp.loopxxi.com/mcp

JSON settings are under “For developers” below

Stuck? Ask people who use loop-mcp💬 Discussion →
For developers: Terminal commands and JSON settings

Over the web

Claude Code

claude mcp add --transport http loop https://mcp.loopxxi.com/mcp

Cursor (~/.cursor/mcp.json)

{
  "mcpServers": {
    "loop": {
      "url": "https://mcp.loopxxi.com/mcp"
    }
  }
}

VS Code (mcp.json)

{
  "servers": {
    "loop": {
      "type": "http",
      "url": "https://mcp.loopxxi.com/mcp"
    }
  }
}

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

At a glance

Downloads per weeki
Not on npm/PyPI
Verified domain
✓ loopxxi.com
Licencei
No licence stated
Connection
Runs in the cloud
Transport
streamable-http
Latest versioni
2.4.0
Published to registryi
Oct 8, 2026
Code last changedi
–
Maker
loopxxi.com
Repo
–
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.

Connect over the internet in

ClaudeChatGPTGooseLM StudioMsty StudioCherry StudioCursorVS Code + GitHub CopilotVisual StudioWindsurf (Devin Desktop)ZedKiroClineContinueJetBrains AI AssistantClaude CodeCodex CLIGemini CLIOpenCodenodecodeWarpLibreChatOpen WebUIRaycast

All apps, with pros and cons →

Related guides

What it can do

Tool names and descriptions exactly as the server reported them on Nov 8, 2026. The maker wrote them, not us; we show them as plain text.

  • btc_price

    Get the current Bitcoin price in USD and other major currencies. Source: mempool.space. Real-time. Each reading carries source (the URL read), fetched_at (UTC, RFC 3339) and source_sha256 (SHA-256 of the upstream body as served).

  • btc_send_decision

    Returns a composited send-or-wait recommendation for a Bitcoin transaction. Fetches live mempool and fee data, then outputs a machine-actionable verdict (SEND_NOW, WAIT, or URGENT_ONLY) with fee rates in sat/vB, mempool pressure level, and estimated savings if you wait. Ideal for

  • lightning_address_resolve

    Resolve a Lightning Address (user@domain.com) to a payable BOLT11 invoice for a given amount. Handles the full LNURL-pay protocol internally. Returns the invoice plus min/max sendable amounts for validation.

  • tx_decode_explain

    Fetch a Bitcoin transaction by txid and return a structured, agent-ready summary: type (P2WPKH/P2TR/P2SH/etc.), input/output counts, fees, fee rate in sat/vB, confirmation status, RBF flag, SegWit/Taproot flags, and a one-line agent_summary string ready for LLM context injection.

  • optimal_send_window

    Bitcoin transaction timing intelligence. Returns a congestion forecast for the next 1-4h, a recommended UTC send window when fees are projected at/below your target, a fee trajectory (rising/stable/falling) with a calibrated confidence score, next-block minimum fee, confirmation

  • json_validate

    Validate JSON, identify its root type, and return normalized JSON plus a SHA-256 content hash.

  • json_extract

    Extract one value from JSON using a simple dot path with array indexes, for example users[0].email.

  • csv_to_json

    Convert CSV, TSV, semicolon, or pipe-delimited text into structured JSON with bounded row output.

  • text_analyze

    Return deterministic text statistics, estimated tokens, reading time, and a SHA-256 content hash.

  • hash_generate

    Generate a SHA-256 or SHA-512 digest in hexadecimal or Base64 form.

  • base64_convert

    Encode UTF-8 text to Base64 or decode Base64 safely, with standard and URL-safe alphabets.

  • timestamp_convert

    Convert Unix seconds, Unix milliseconds, RFC3339, or ISO dates into normalized UTC timestamp forms.

  • uuid_generate

    Generate one to one hundred cryptographically random RFC 4122 UUID version 4 identifiers.

  • url_parse

    Parse an HTTP or HTTPS URL into normalized scheme, host, port, path, query, and fragment fields without fetching it.

  • jwt_decode

    Decode JWT header and payload claims locally without verifying the signature. The response always marks verification as false.

  • business_ratios

    Compute cash runway in months, cash buffer days, current ratio, quick ratio, debt to equity, DSO, DIO, DPO and cash conversion cycle from any subset of a business's own cash, monthly flow and balance sheet figures. Arithmetic only, no network. Each value carries its formula and t

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 11, 2026

  • ! Caution

    Maker matches the repo

    The registry lists no source repo, so we cannot match the publisher (loopxxi.com) to the code

  • … 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

  • ✓ Pass

    Endpoint responds

    Responded in 392 ms (HTTP 200)

  • – Not applicable

    Sign-in with OAuth

    No sign-in needed

  • ✓ Pass

    No hidden instructions in tool descriptions

    Read 16 tool descriptions and found no hidden instructions to the AI

Discussion

Ask, share a tip or report that it does not work. Sorted by what people marked helpful.

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Posts here are written by users, not the PopNx team.

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User reviews

No reviews yet

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Compared with others in Crypto & blockchaini

  • More stars than 0% of the other 1637 servers in this category
  • Published to the registry more recently than 58% of the other 1637 servers in this category
  • Basic checks equal to or better than 49% of the other 1637 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 loop-mcp safe?

It passed 2 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 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 (2.4.0) reached the registry 34 days 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 Business and above.

What can I use instead?

In the same category: Solana MCP by Vybe, Oracle3 prediction-market arbitrage checks, Polymarket Paper Trader

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

Solana MCP by Vybe

Solana MCP developer toolkit: wallets, trades, markets, PnL, transfers, onchain, swaps & API tools.

by vybenetworkWidely used★ 2.6K Stars for the whole repoUpdated 6 months ago

Runs in the cloud

Polymarket Paper Trader

Polymarket paper trading for AI agents: $10k paper money, real order books, official fees.

by agent-nextGrowing↓ 226/wk★ 503Updated 26 days ago

Runs on your computer

README from the maker

No README found in the repo