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

Freeport Nostr

by ptrinhversion 0.5.0i★ –iComputer or cloud
Registry nameio.github.ptrinh/freeport-nostr

Install

Overview

Description from the maker (original English)

Search Freeport Nostr events by kind, tag & geohash radius (rides, services, reputation).

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.

Install

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

Before you install

  • Basic checks: 1 of 1 passed
  • Runs on the maker’s server: what you ask it goes through their server.
  • You fill in yourself: FREEPORT_RELAYS

You need

  • Runs in the cloudNothing to install; it connects over the internet
  • npmNode.js installed (for the npx command)

Which app do you use?

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

Works in Claude on the web, desktop and mobile:

  1. Open Settings → Connectors
  2. Press Add custom connector
  3. Paste the address below and press Add
  4. If it asks you to sign in, sign in with the maker
SettingsConnectors1+ Add2https://…3
https://nostr-mcp.trinh.uk/mcp

Or run it on your computer

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

{
  "mcpServers": {
    "freeport-nostr": {
      "command": "npx",
      "args": [
        "-y",
        "freeport-nostr-mcp"
      ],
      "env": {
        "FREEPORT_RELAYS": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add --transport http freeport-nostr https://nostr-mcp.trinh.uk/mcp

Or run it on your computer

claude mcp add freeport-nostr --env FREEPORT_RELAYS=your-value -- npx -y freeport-nostr-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": {
    "freeport-nostr": {
      "url": "https://nostr-mcp.trinh.uk/mcp"
    }
  }
}

Or run it on your computer

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "freeport-nostr": {
      "command": "npx",
      "args": [
        "-y",
        "freeport-nostr-mcp"
      ],
      "env": {
        "FREEPORT_RELAYS": "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": {
    "freeport-nostr": {
      "type": "http",
      "url": "https://nostr-mcp.trinh.uk/mcp"
    }
  }
}

Or run it on your computer

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "freeport-nostr": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "freeport-nostr-mcp"
      ],
      "env": {
        "FREEPORT_RELAYS": "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.

ChatGPT connects only to servers on the internet:

  1. Open ChatGPT on the web → Settings → Connectors (Apps)
  2. Press Create or Add (some plans need Developer mode under Advanced first)
  3. Paste the address below, give it a name and save
  4. If it asks you to sign in, sign in with the maker
SettingsConnectors1+ Create2https://…3
https://nostr-mcp.trinh.uk/mcp

Menu names can differ slightly by plan and over time.

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

Values you fill in

  • FREEPORT_RELAYS env
    Comma-separated relay websocket URLs. Defaults to the Freeport public relay set.

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

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

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 8, 2026

  • ✓ Pass

    Maker matches the repo

    The registry name was verified with the GitHub account ptrinh, 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 checked yet

    Endpoint responds

    Not checked yet; we check endpoints in rotation

  • … Not checked yet

    Sign-in with OAuth

    Not checked yet; we check endpoints in rotation

  • … Not checked yet

    No hidden instructions in tool descriptions

    Not checked yet; we read the tool list when we check the endpoint

Compared with others in Search & AI memoryi

  • More stars than 0% of the other 5680 servers in this category
  • Published to the registry more recently than 18% of the other 5680 servers in this category
  • Basic checks equal to or better than 100% of the other 5680 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 Freeport Nostr 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?

Either way works: install it on your computer or connect to the cloud version.

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.5.0) reached the registry 5 months 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 in developer mode.

What can I use instead?

In the same category: Context7, Codebase Memory, Exa

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

Context7

by upstash

Feeds AI the latest docs for libraries and frameworks before it answers, so code it writes does not use outdated, removed functions.

Computer or cloud★ 64,224MITUpdated 2 days ago
Install

Codebase Memory

by DeusData

Codebase knowledge graph for AI agents — 162 languages, sub-ms queries, 99% fewer tokens.

Runs on your computer★ 48,148MITUpdated 21 days ago
Install

Exa

by exa-labs

Connect AI agents to Exa for web search, content fetching, and multi-step research.

Runs in the cloud★ 5,213MITUpdated 2 months ago
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.

Freeport

Decentralized P2P marketplace over Nostr. Users broadcast trade intents into topic-scoped markets; personal agents discover counterpart intents and negotiate automatically. Humans confirm final deals. No central operator, no matching server — relays are dumb pub/sub, all logic is client-side.

  • App: https://freeport.network (web/PWA) · iOS · Android · Desktop — Mac/Windows/Linux · Offline HTML
  • Whitepaper: PDF
  • Self-host: packages/freeport-self-hosted (docker compose up -d), or any desktop install can host the app for your network with freeport --serve.
  • Developers: CONTRIBUTING.md — repo layout, stack decisions, quick start, CLI.

Demo (2 minutes)

https://github.com/user-attachments/assets/506c82ac-c5eb-415d-b981-ba14c4f165bc

_Also on the landing page._

Why Freeport exists

  • It's a research project. How far can pure P2P infrastructure go? Buyers, sellers, riders, drivers meet over Nostr, settle in Lightning or cash. Nothing in between needs permission to exist.
  • It's a thesis. A P2P marketplace with a reputation system works. When people own their reputation, the market self-regulates.
  • It's a check and balance. A zero-fee exit that answers to no one puts a ceiling on how greedy the big platforms can get.
  • It's fun. An open protocol, Claude Code as a pair programmer, no investor deck.
  • Nobody profits — including me. No operator, no cut. A protocol, not a platform. Run it or fork it.
  • No one will protect you here — that's the point, and the price. No support line, no refunds, no central authority. Your judgment comes first, backed by opt-in safeguards no operator runs: a reputation system (karma, co-signed receipts, web-of-trust), escrow arbitration (examples/arbitrator), ID verification (examples/id-verification), and insurance (examples/insurance-store) priced from reputation. You choose how much of the safety net to use.

What works today

  • Everywhere: iOS + Android app stores, web/PWA, desktop installers for macOS/Windows/Linux with self-update — plus a single-file offline copy: the whole app in one HTML file that runs from file://, no install, no server.
  • Wallet (experimental): built-in self-custodial Bitcoin Lightning + stablecoin (USDT/USDB) wallet (Breez SDK/Spark). Keys derive from your Nostr key — one backup covers identity and funds. Lightning address (you@freeport.network), on-chain, QR scan, local-currency balances, and one-tap Pay / Pay QR on confirmed deals. Bring your own wallet over NWC instead if you prefer. Spark is a young trust-minimized L2 — treat it as a spending wallet.
  • Reputation: peer-rated karma, co-signed deal receipts, proven-deal counts, web-of-trust weighting. Sybil resistance stays open — treat zero-history identities with caution.
  • Chat: invite-based 1:1 encrypted chat beyond deals — QR/link invites, replies, emoji reactions, disappearing messages, delivery/read receipts, voice messages, location sharing, in-chat search and Lightning payments. Between updated clients it upgrades to NIP-17 gift wrap, so relays can't even see who talks to whom.
  • Calls (experimental): peer-to-peer audio/video calls in chat (WebRTC, end-to-end encrypted, signaling over encrypted DMs — no call server), with screen sharing on web. Optional TURN fallback.
  • Zaps & Shops: NIP-57 zap tipping on posts (verifiable receipts), and NIP-15 storefronts — durable seller listings with a conversational "chat with seller" checkout.
  • Escrow without a custodian: HODL-invoice conditional payments on confirmed deals — the buyer holds the preimage, the seller can only settle on release, unreleased funds auto-refund. The Lightning protocol enforces the lock; nobody ever holds the money in between.
  • Mini-apps (experimental): third-party web apps run inside Freeport with your portable identity (NIP-07) and wallet (WebLN + Spark/stablecoin) — sandboxed behind a permission firewall where every sensitive action needs your approval (architecture & threat model). A dedicated Apps tab hosts the launcher — a home-screen-style grid (add any app by URL or QR, drag to rearrange), with the wallet as its first tile; your apps and their grants travel with the account backup. One tag makes a page work on web too. Mini-app examples:
  • examples/esim-store — eSIM shop with Spark/stablecoin checkout, live at apps.freeport.network/esim-store
  • examples/insurance-store — travel insurance quotes underwritten from npub-derived reputation, with a downloadable PDF certificate, live at apps.freeport.network/insurance-store
  • examples/id-verification — a paid identity / licence verification service: submit documents, book a video call, and get a shareable verification link for your profile, live at apps.freeport.network/id-verification
  • examples/arbitrator — decentralized dispute arbitration: an escrow with the arbitrator as a conditional key, encrypted evidence (NIP-44), and a fee only charged when a dispute is actually raised — the arbitrator's npub karma is their license, live at apps.freeport.network/arbitrator
  • On-device AI (experimental): describe what you need in any language and it drafts your post; incoming chat messages auto-translate. Runs entirely on your device (Apple Intelligence / Android ML Kit + Gemini Nano / Chrome built-in AI) — your words never leave it.
  • Notifications & Telegram: content-blind push, plus a Telegram bridge — market feeds in groups, one-tap broadcast of organic posts, personal pings.
  • 56 languages, full RTL, in-chat translation.

Non-goals (v1)

Custody (payments stay self-custodial wallet-to-wallet; even escrow is trust-minimized HODL invoices, never a held balance), dispute resolution, vetting, anti-sybil — all deliberately deferred.

Donate

BTC: bc1ps44wjx3wpu4s0xj746gz2lu45nspsm9059d3ym8xz0nrhu4psyasdgwwhx

License & forking

MIT (LICENSE). Freeport exists to be forked: any community can stand up its own market — own name, city, vertical, relays and services — by changing configuration, not architecture. [FORKING.md](FORKING.md) lists every deployment-specific value; CONTRIBUTING.md covers dev setup and style.

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