Browser extension · Chrome and Firefox · early release

Monero on the pages you already use.

XMRadar shows who takes Monero on X, lets you tip them from your own wallet or send a Monero like, checks swap sites before you deposit, and copies posts to Nostr.

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Free and open source. Holds no Monero keys and no funds.

Swap safety · receipts and letters

Check the swap before you send.

On a swap order page, XMRadar checks the exchange's signed receipt or letter of guarantee against the deposit address the page shows, keeps a copy for disputes, and shows the site's grade on xmr.club.

Download for Chrome Download for Firefox

Free and open source. Holds no Monero keys and no funds.

example.swap order

Send 0.5 XMR to

8sB7dgX9Lv4DfMJfv9Jb15ryPf1pVzvAgW982E1YtVfQkjZEoRGyH1Juxy3DVLfATCWEmGyfTdT9XMopGPNT6EUnfAqScva

Letter ✓

Signed with the operator's key from xmr.club's list. The deposit address matches. Saved in this browser.

Bexample.swapgrade on xmr.club

Address not in the signed letterdon't send

Your badge · four steps, in Options

Wear a Monero badge on X.

Publish your Monero address, link your X account with one tweet, and XMRadar users see an XMR badge next to your name. No Nostr signer needed: without one, XMRadar makes a Nostr key for you, kept in this browser.

Download for Chrome Download for Firefox

Free and open source. Holds no Monero keys and no funds.

What it does

01 · X · NKIP-0002

Tip badges

An XMR badge on X for people who published a Monero address on Nostr or verified it on xmr.bio, including people XMRadar listed there. Click it to tip from your own wallet; a Xap records the tip on Nostr. Totals separate tips the recipient confirmed from ones that are only claimed.

ɱ 0.004 ✓+0.002 claimed

02 · X · NIP-25

xo, a Monero like

A heart next to the Xap button sends the author a Monero like over Nostr. Hold it (or press Shift+Enter) to like the post on X too. Badge holders who haven't set up XMRadar yet get it too: it waits for them, and counts once they do. Accounts with xos get a thin orange ring on their avatar and the total in their badge, counted by xmr.bio. Received xos count only from Monero people, with a Monero address and a verified X link, and can notify you along with your Xaps.

♥ 12hold: also like on X

03 · Options → Monero identity

Your own badge

Four steps: a Nostr key, your X handle, your Monero address, and one tweet that links them. No signer? XMRadar makes a Nostr key for you, kept in this browser. Once your link and address check out, XMRadar also lists you on xmr.bio (you can untick it), whose directory XMRadar users with badges on download, so they see your badge too.

Address published

X account linked

Listed on xmr.bio

04 · NKIP-0001 · letters of guarantee

Swap guard

On an exchange's order page, XMRadar checks the signed NKIP-0001 receipt, or the operator's letter of guarantee (PGP or MistProof), against the addresses on the page and in what you copy. A verified copy is saved in your browser for disputes. The toolbar shows the site's xmr.club grade, with a warning for open incidents, and a lookalike of a listed exchange or wallet gets a warning page before it loads.

Exchange data from xmr.club, licensed CC BY 4.0.

Receipt verifiedexample.swap

Letter verifiedsigned with the operator's listed key

Address doesn't match the receipt

05 · NKIP-0003

Sign in with Monero

A monero-signin: link opens XMRadar's own window with the site, the account, the address, where the signature goes and the full message. Links that break the spec, have expired or come from another site are refused. Your wallet signs; step-by-step guides for Feather, Monero GUI, Cake Wallet, the CLI and RPC.

xmr.biosign in as @satoshi_fan

06 · kyc.rip GhostMail

Burner email

A throwaway address in one click for sign-ups. New mail shows up as a notification with the code already pulled out.

qz4r8m@ghostmail.kyc.rip42 min

07 · Nostr

Copy posts to Nostr

Right-click a post on X, Bluesky, Mastodon or any page, or hover it and press Alt+Shift+N. Text, images, whole X threads, quoted posts as a picture, and up to 5 tags go to your relays, signed by your own NIP-07 signer (needed here: XMRadar's own key never signs your posts). Copied X posts get a small Nostr ✓.

AltShiftN

08 · chat.xmr.club

Chat

Menu → Chat opens chat.xmr.club in Chrome's side panel or Firefox's sidebar: a lobby, an X room and a room for each site listed on xmr.club.

# lobby# x# example.swap

SEEN A "VERIFYING THAT I CONTROL…" TWEET? That's an X account linking its Nostr key The tweet proves the X account and the Nostr key belong together (NIP-39). Once that key also publishes a Monero address, the account can wear an XMR badge: XMRadar shows it to users who look accounts up on Nostr, and, when XMRadar lists the account on xmr.bio, to everyone with badges on through xmr.bio's signed directory. The listing also gives a wallet name, yourhandle.oa.xmr.bio, for OpenAlias wallets. Then anyone can tip them from their own wallet.

Install XMRadar

Install XMRadarChrome or Firefox, below.
Options → Monero identityYour handle, your Monero address, and one tweet XMRadar writes for you.
Wear itXMRadar users with badges on see it, and can tip you or send an xo.

See it on X

Real screenshots from @XBToshi's profile, with XMRadar installed.

An XMR badge next to the name of anyone who published a Monero address and linked it to their X account.

A post whose action bar has a Monero Xap button showing ~0.0017 — A **Xap** button on each of their posts, with the tips so far (`~` means claimed by the tippers, not yet confirmed).

What it never touches

XMRadar runs in your browser, with no account. Its own site is asked only for the latest version number; other services are asked only for the features you use, listed below. The code is open, so you can check every claim.

KYC-rip/xmradarRead the source →

✓
No Monero keys, no fundsTips open in your wallet, and your wallet signs for Sign in with Monero. XMRadar never sends or holds Monero.
✓
Your Nostr key, your choiceWith a NIP-07 signer, events go through it, and it decides what to ask you. Without one, XMRadar makes its own key, kept in the extension's own storage (IndexedDB) that pages and content scripts can't open, exportable and deletable in Options. That key signs only XMRadar's own events without asking each time: xos and their removal, Xap receipts and confirmations, your profile name, relay list, Monero address, X link and the xmr.bio listing request. Never your posts.
✓
xmr.bio listing is your choiceOn by default. Once your X link verifies and you've published a Monero address, and xmr.bio doesn't know your handle yet, XMRadar sends your handle, address, Nostr key and the proof tweet's id to xmr.bio. Your profile and its directory show the handle, address and key; the tweet id stays in the stored proof. Untick it in Options → Monero identity; on xmr.bio, unlist hides you and delete removes the profile.
✓
What an xo showsAn xo is a public Nostr event naming the X post's link, the author's X handle and, when it's known, their Nostr key, so relays see who liked what. Holding the heart, or the option for a plain click, also likes the post on X.
✓
No transaction ids in publicTip receipts never include a transaction id, tx key or payment proof.
✓
xmr.bio's directory comes wholeWhile badges are on (the default), XMRadar downloads xmr.bio's signed directory, the same file for everyone, about once an hour, and matches X accounts on your device. xmr.bio doesn't learn which accounts you view.
✓
Discovery is off by defaultLooking up X accounts on relays is opt-in, because relays can see which accounts you view.
✓
The site you visit stays in your browserxmr.club's signed list is downloaded whole, the same file for everyone, and matched on your device, lookalike warnings included.
✓
Receipts and letters stay localChecked and saved in your browser only. A letter is asked for only from the order page's own site, and keys come from xmr.club's signed list, never from the page.
✓
Burner mail stays localGhostMail gets only what the inbox needs (its address and token, and a random proof-of-work seed when it's created), nothing about the page you are on.
✓
The update check carries no IDOnce a day it asks xmradar.app for the latest version number, with no version, ID or page in the request. Like any visit, the site sees your IP address and browser, and that XMRadar is in use. It only tells you; you download and check the new zip yourself. You can switch it off.
✓
Tag suggestions are opt-inOff by default. A local model keeps the post on your computer; a provider gets the post's text and tags only with your own key, which no page can read.

OPEN STANDARDS Built on Non-KYC Improvement Proposals Any wallet, exchange or client can implement them.

NKIP-0001Verifiable deposit receipts→ NKIP-0002Verifiable Monero tips on NostrDraft NKIP-0003Sign in with Monero→

Install XMRadar

Not in the Chrome or Firefox stores yet. Download the zip from GitHub Releases, unzip it, and load it from chrome://extensions (Developer mode → Load unpacked), or in Firefox 140+ from about:debugging.

Works with any Monero wallet that opens monero: links. A NIP-07 signer such as Alby or nos2x is optional: without one, XMRadar's own key covers your badge, xo and Xap receipts (when they're on). Copying posts to Nostr needs a signer.

Download for Chrome Download for Firefox

Version 0.6.13.21 · release notes

VERIFIABLE BUILDS Every release is built by CI from a public commit The build number comes from the CI run. The same commit builds byte-identical zips on the same OS, Node and zip tool (CI's Ubuntu 24.04 build is the canonical one), and each release is signed with a provenance record.

version0.6.13.21 commit3331619 sha-256e4ed…6ddf xmradar-0.6.13.21-chrome.zip

gh attestation verify xmradar-0.6.13.21-chrome.zip -R KYC-rip/xmradar All releases and checksums →

Free, open source, no ads, no trackingIf XMRadar is useful to you, a Monero tip keeps it maintained.

ɱ Donate Monero