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Currensor

Official registry Other

Live currency conversion for 166 currencies, shown as an interactive in-chat card. No sign-in.

Source code Website Documentation

What can you do with Currensor?

  • Live exchange rates — Updated hourly; the page checks again just after each update, and falls back to two daily public feeds if the hourly service is down
  • 50 currencies — Grouped by region (Americas, Europe, Asia & Pacific, Middle East & Africa)
  • Multi-currency view — See up to 5 conversions side by side
  • Smart swap logic — Picking a currency already in use auto-swaps instead of duplicating
  • Drag to reorder — Rearrange your target currencies by dragging the grip handle
  • Dark & Light themes — Trading terminal dark mode or clean travel app light mode, saved to your preference
  • Shareable conversion cards — Generate a branded PNG image of your conversion to share anywhere
  • Export / Copy — One tap copies all conversions with currency symbols, ready to paste into WhatsApp, Slack, or email

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http currensor 'https://currensor-mcp.currensor-mcp.workers.dev/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "currensor": {
            "type": "http",
            "url": "https://currensor-mcp.currensor-mcp.workers.dev/mcp"
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. Curren$or 💱
  2. Use it inside Claude or ChatGPT
  3. Features
  4. How to Use
  5. Supported Currencies
  6. Tech Stack
  7. Version History
  8. Roadmap
  9. Why I Built This
  10. License

Curren$or 💱

A sleek currency converter you can self-host in seconds. Compare up to 5 currencies at once with live exchange rates, swap them around, search through 50 options. One HTML file, zero setup.

→ Try it live · → Use it inside Claude or ChatGPT

Use it inside Claude or ChatGPT

Currensor also runs as a plugin (an MCP server) for Claude and ChatGPT. Ask for a conversion in plain words and a live Currensor card appears right in the chat. Change the amount on the card and every currency updates instantly.

Plugin address:

https://currensor-mcp.currensor-mcp.workers.dev/mcp
AppHow to add it
ClaudeSettings → Connectors → Add custom connector → paste the address → choose No sign-in
ChatGPTSettings → Plugins → Developer mode on, then + → Create custom MCP server → paste the address → No Auth

Then ask: "Use Currensor to convert 250 CAD to INR, EUR and JPY."

  • Live mid-market rates for 166 currencies, refreshed daily, with a backup rate feed
  • No sign-in, no API key, nothing about you stored. The server keeps only anonymous daily counts (which app, which currency pair) to see if people find it useful
  • Free and open source: the server is in mcp/ and runs on Cloudflare Workers

Features

  • Live exchange rates — Updated hourly; the page checks again just after each update, and falls back to two daily public feeds if the hourly service is down
  • 50 currencies — Grouped by region (Americas, Europe, Asia & Pacific, Middle East & Africa)
  • Multi-currency view — See up to 5 conversions side by side
  • Smart swap logic — Picking a currency already in use auto-swaps instead of duplicating
  • Drag to reorder — Rearrange your target currencies by dragging the grip handle
  • Dark & Light themes — Trading terminal dark mode or clean travel app light mode, saved to your preference
  • Shareable conversion cards — Generate a branded PNG image of your conversion to share anywhere
  • Export / Copy — One tap copies all conversions with currency symbols, ready to paste into WhatsApp, Slack, or email
  • Bottom-sheet picker — Mobile-friendly currency selector with instant search
  • Cross-platform flags — Twemoji flag images that render identically on every device
  • Graceful fallback — Bundled rates kick in if APIs are unavailable
  • Zero dependencies — One HTML file. No frameworks, no build step, no node_modules

How to Use

Option 1: Just open it

git clone https://github.com/Kay0sstheory/Currensor.git
cd Currensor
# Open index.html in your browser

Option 2: GitHub Pages (free hosting) Already live at kay0sstheory.github.io/Currensor

Supported Currencies

Americas: USD, CAD, MXN, BRL, ARS, CLP, COP, PEN Europe: EUR, GBP, CHF, SEK, NOK, DKK, PLN, CZK, HUF, RON, TRY, RUB, UAH, ISK Asia & Pacific: JPY, CNY, INR, KRW, SGD, HKD, TWD, THB, MYR, IDR, PHP, VND, PKR, BDT, LKR, AUD, NZD Middle East & Africa: AED, SAR, QAR, KWD, BHD, ILS, EGP, ZAR, NGN, KES, MAD

Tech Stack

  • Pure HTML, CSS, JavaScript — no frameworks, no libraries
  • Hourly rates service on Cloudflare Workers (primary, source in mcp/) + Open Exchange Rates API and Currency API (daily backups)
  • Twemoji CDN for cross-platform flag rendering
  • DM Sans + Space Mono fonts via Google Fonts
  • Canvas API for shareable card generation
  • Dark/light themes via CSS variables with localStorage persistence
  • Mobile-responsive down to 360px viewport

Version History

  • v2.2 — Claude & ChatGPT plugin with an in-chat card; refreshed backup rates
  • v2.1 — Swap logic fix, drag-to-reorder, cross-platform Twemoji flags, bigger rate text, dark/light theme toggle, shareable conversion cards, export/copy with currency symbols
  • v2.0 — Live exchange rates, 50 currencies grouped by region, live status indicator, improved mobile UX
  • v1.0 — Initial release with bundled rates and 20 currencies

Roadmap

  • [ ] Interactive globe for selecting target currencies (v3)
  • [ ] Historical rate sparkline charts
  • [ ] Rate heatmap — weekly performance at a glance
  • [ ] Volatility indicator per currency pair
  • [ ] Purchasing power comparison
  • [ ] Shareable URLs with encoded conversion state
  • [ ] Favorites saved to localStorage

Why I Built This

I'm building tools with AI and learning in public. I can't write code from scratch (yet), but I can design, think through problems, and ship real products by collaborating with AI. Every project teaches me something new.

Follow along: @Kay0sstheory

License

MIT — do whatever you want with it.

Frequently asked questions

What is Currensor?

Live currency conversion for 166 currencies, shown as an interactive in-chat card. No sign-in.

How do I install Currensor?

It runs as a remote server. In Claude Code: claude mcp add --transport http currensor 'https://currensor-mcp.currensor-mcp.workers.dev/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Currensor need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is Currensor open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains Currensor?

It is published by Kay0sstheory. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.