keychat
Keychat

https://www.keychat.io/

Keychat is a chat app, built on Bitcoin ecash, Nostr protocol and Signal/MLS protocol. Keychat is inspired by the postal system — stamps, post offices, letters. Keychat uses Bitcoin ecash as stamps and Nostr relays as post offices. Keychat uses Signal/MLS protocol to ensure message encryption security and meta-data privacy. https://www.keychat.io/

Public Key

npub1h0uj825jgcr9lzxyp37ehasuenq070707pj63je07n8mkcsg3u0qnsrwx8

NIP-57 Address

opposedmouse41@walletofsatoshi.com

Profile Code

nprofile1qqsth7fr42fyvpjl3rzqclvm7cwves8l8l8lqedgevhlfnamvgyg78spz3mhxue69uhhyetvv9ujuerpd46hxtnfduq3qamnwvaz7tmwdaehgu3wwa5kueg5uedgv

Publishing to

relay.damus.io

nostr.wine

eden.nostr.land

Author Public Key

npub1h0uj825jgcr9lzxyp37ehasuenq070707pj63je07n8mkcsg3u0qnsrwx8

Show more details

Last Notes

2025-04-27 09:03:16

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Yes.

2025-04-26 09:06:16

We spend time every day helping people understand Keychat. Feel free to @Keychat anytime you have questions.
#nevent1q…v4kz

2025-04-26 09:04:00

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Explaining Keychat is as important as building it.

2025-04-25 11:48:30

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Keychat currently uses Google’s Firebase Cloud Messaging (FCM) service for message notifications. If you turn off notifications, this service will no longer be used.

2025-04-25 11:20:35

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Centralized chat apps often enhance discovery by accessing users’ phone contacts — something Keychat doesn’t and can’t do by design. Instead, discovery on Keychat works more organically: when someone starts using it, they tend to invite friends who are also into BTC or Nostr. Keychat is primarily designed as a private messaging app for friends, rather than a platform for connecting with strangers. That said, it can still be used that way — for example, users can include their Keychat ID in their Nostr profile to make themselves discoverable.
Regarding the sentence “I understand that each persona has a different key pair, but feels a missed opportunity,” I’m not entirely sure what you mean — could you clarify?

2025-04-25 07:39:53

To explore the design inspiration and design philosophy behind Keychat, feel free to read the short content below.
https://www.keychat.io/about.html

2025-04-24 23:30:29

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You can use your existing npub or generate a new one.

2025-04-24 15:40:31

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Click this link and copy the npub from the profile.
https://image.nostr.build/d064c089741f1db171a73733ee941f5f03d4b6e0d79a4d6d5a8309b6104e6547.jpg

2025-04-24 10:45:26

Great news — Keychat is now live on the Apple App Store! We’re still waiting for Google Play approval.
iPhone users can download it here:
https://www.keychat.io/
If you need some ecash sats to try out Keychat’s unique sats stamp feature, you can add this Keychat ID as a friend.👇
@npub17a6…7x39
By quoting this note, you’ll also get zapped with sats.

2025-04-23 15:19:07

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Yes. iOS, macOS, and Android all natively support WebView.

2025-04-23 03:48:37

Keychat group chats are private and can only be joined through friend invitations. You can’t invite others to join the group by sharing a Group ID.
If you want to create a public group chat, you can use Chachi in the Keychat browser. Chachi is a web client for public Nostr group chats.
Here’s a public group we’ve created: https://chachi.chat/groups.0xchat.com/2gVadOYXRyzc2ne6.
If you see this note in Jumble on Keychat browser, just click the link to join the group. 👇
#note1dwn…p8ad

2025-04-21 15:52:46

It’s been two weeks since we submitted Keychat to the Apple Store and Google Play. Still under review. Maybe Keychat is just a little too avant-garde. 😂

2025-04-17 15:09:28

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#nevent1q…m0s0

2025-04-15 15:12:53

Offline Me needs self-controlled IDs and wallets to live in the physical world.
Online Me also first needs self-controlled IDs and wallets to live in the digital world.
Then Me can chat and browse.
In Chat, Me uses the IDs and pays for relays per message with the wallets.
In Browser, Me uses the IDs to log in to mini apps and pays in Bitcoin with the wallets.
https://image.nostr.build/d7a3ffb5cd74f70a8aee87a144ccab94eba332fb27eeac1fcc7388b8469f8c93.png
https://image.nostr.build/46370c7c3ff09725718c2340f65a1dbc6c67ca94c309367530dac15e3276bd18.png
https://image.nostr.build/0439136cec0b8ab549824c6c9a7733a1a3eb417900eea273527e15bb0c51bbe3.png
https://image.nostr.build/cba150fd5ae1f8c5cdbf22c7f6e47b61476434a2ef078d12e9943e635dcb73a4.png

2025-04-15 14:34:43

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Yeah.

2025-04-15 14:26:01

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We're currently using WebView, which is the web engine built into the operating system.

2025-04-15 13:33:53

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Signal: Ratchet advances inline with message sending — no extra messages needed.
MLS: Requires extra protocol messages (Update proposals and Commits) to advance the key state and ensure post-compromise security.

2025-04-15 13:07:14

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Amber. It supports NIP-55.
https://github.com/nostr-protocol/nips/blob/master/55.md

2025-04-15 12:48:33

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In case you missed it, Keychat users can ask the AI bot questions and pay per message with ecash Cashu sats, as shown in Screenshot 2. This is different from the sat stamp paid to the relay.

2025-04-15 12:38:45

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We believe Jumble is the best Nostr microblogging web client.

2025-04-15 12:33:33

Using Jumble on Keychat for macOS
https://image.nostr.build/2888e6a23cab4fa4a638707931ebcc7ad63644d2199dd63fe660008e29c76711.png

2025-04-03 04:13:00

ID+Wallet, Chat+Browser
#note13sx…nk7y

2025-04-02 10:42:53

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Keychat doesn’t support WebLN yet.
The web client generates an invoice, which is a string starting with “lnbc”. When the user clicks to pay, the browser navigates to a URL containing the invoice. Keychat detects this redirect and then displays the payment window.

2025-04-02 10:30:19

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In Keychat, Jumble calls the Keychat wallet to zap a note.👇
https://video.nostr.build/2b21e1fc74c3a668197328177f82e7aed40c0a80254b1e96e066140926cbc11c.mp4

2025-04-02 10:14:12

Mini app
https://image.nostr.build/2d784455fa814e394e2cdf706bd30cd93434e232775c273d546575fcb856b567.jpg

2025-03-31 23:44:42

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When you log into Keychat using your main Nostr identity, the people you chat with can see the public notes you’ve posted. Keychat uses a seed phrase, so you can generate multiple IDs. We recommend giving it a try!

2025-03-31 14:53:22

Keychat first learned from Signal, and then from WeChat.
However, the user autonomy in Keychat (ID + Money) is something that neither Signal nor WeChat offers.
#note13sx…nk7y

2025-03-31 14:41:32

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Yes.

2025-03-31 14:24:01

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We’ve caught a good timing. The idea of MLS was first proposed in 2016, and the official standard (RFC 9420) wasn’t released until July 2023. OpenMLS only became roughly usable in 2024 and is still in its early stages.

2025-03-31 13:56:40

Some updates:
We've finally sorted out the Apple developer account. We expect to release the iOS version of Keychat within a week or two, and possibly a macOS version as well (although the UI isn’t fully optimized for large screens yet).
We're currently revising our MLS group implementation. We've studied the codebases of NIP-104 and White Noise in depth and learned some useful design ideas—such as encrypting MLS messages using NIP-44 and hiding the `group_ID`. We’ve also been posting comments and discussing better mechanisms, like more efficient ways to update the MLS group’s receiving addresses. Ultimately, we hope different MLS clients will be able to interoperate.

2025-03-31 13:21:34

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Thanks. Keychat first learned from Signal, and then from WeChat.

2025-03-31 12:48:15

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Yes, MLS groups are still in the testing phase, and we’re continuing to improve them.

2025-03-31 12:22:48

We summarize different end-to-end encrypted group messaging schemes.
Keychat supports pairwise group (small group) and MLS group (large group).
#note1qu6…pvdk

2025-03-28 11:20:04

👍
https://image.nostr.build/6dabe15c9d360e0c5703a1d115691e0734aa2824264f9be322881f3f946bc6e4.jpg
#note1vq3…72lc

2025-03-25 10:56:04

👍
In the Bitcoin era, using your own PoW instead of ecash sat stamps is like going back to the Bitgold or B-money era.
#note1ka2…rg27

2025-03-21 03:20:09

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The Keychat browser simply uses the underlying WebView component of the operating system.

2025-03-20 13:20:40

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#nevent1q…lkqg

2025-03-15 05:17:13

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ちなみに、Keychatを「密信」と翻訳するのはどう思いますか？

2025-03-15 05:11:58

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Web3 + Web2 😆

2025-03-10 13:10:43

Let’s make Keychat’s MLS groups and 0xChat’s MLS groups interoperable in the near future.
#note13nt…u6p7

2025-03-10 01:47:51

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They appear to be focused on native apps. Hopefully, Keychat Browser will encourage them to take the web client more seriously. It will take time.

2025-03-09 12:24:11

Keychat’s browser is partially inspired by WeChat mini programs.
By studying WeChat mini programs, we realized that WeChat has swallowed and digested browsers.
The relationship between WeChat and mini programs is fundamentally similar to that between a web browser and web apps. Most importantly, WeChat provides mini programs with identity and payment services.
However, WeChat has monopolized the ecosystem. Developers must register with WeChat, and only WeChat can serve as the sole browser for mini programs.
In contrast, Keychat’s ID and wallet are open and permissionless.
https://image.nostr.build/0d86dfee0229e0998aa8befd2b8135b13cc07ca25bbf6879e90b61e88adb2546.jpg

2025-03-01 09:13:46

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#nevent1q…mwnd

2025-02-25 10:29:04

Nostr needs more music. https://video.nostr.build/d1aefd27a48c2825a5fe8ea96975be49e7c851b3b662fcf0be887c03499ebcbc.mp4

2025-02-25 10:05:06

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Thank you, we’ll look into this bug.

2025-02-25 09:24:15

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Try logging out and then logging back in. I’m not sure if that will resolve the issue. https://image.nostr.build/95c6eff400f2bc66ee6bb89fecdd0ae14cc8990989bcd23a763c5b4deffdacc9.jpg

2025-02-25 09:09:41

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Choose the first one. https://image.nostr.build/4f88e90cee90fcb6de4a81d10d47ba230143ea4ab4671559792d402aff75af2a.jpg

2025-02-25 09:07:43

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This is a bit odd. I just successfully joined using a different npub, and I haven’t changed any of the default settings since creating the group. I’m not sure what’s causing the issue.

2025-02-25 08:56:20

We have set up a public group (nip-29). If you’d like to report a bug or ask any questions, you’re welcome to join.
Simply enter the group link below in the search box on the Keychat browser page, or search for “Keychat” in Chachi:
https://chachi.chat/groups.0xchat.com/2gVadOYXRyzc2ne6 https://image.nostr.build/0a949e9f10ce9807ad719a5f742c90e633b943206327fe64193a9315297e7b8d.jpg

2025-02-24 11:28:51

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Thanks

2025-02-24 11:17:25

Chat is a private area.
Browser is a public area. https://image.nostr.build/f94d31fd5c3cdae8d57992247e7ef1e690f2f4bffa81ae477c7788360acb420c.jpg

2025-02-24 10:55:19

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We treat it as a bank card.

2025-02-24 10:16:43

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Can you join this NIP-29 group using the Keychat browser? 👇
https://chachi.chat/groups.0xchat.com/2gVadOYXRyzc2ne6

2025-02-24 09:45:27

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#note1qam…3zcm

2025-02-24 07:58:39

We are exploring how Keychat can achieve sufficiently good multi-device synchronization without requiring a centralized server. #note1j9u…ve25

2025-02-24 05:20:22

algo.utxo.one offers a relay service equipped with a recommendation algorithm.
Jumble provides a Nostr web client.
Keychat supplies a browser with built-in public key extension login and a Bitcoin Cashu ecash wallet. https://video.nostr.build/d0a044682051a3a7a4e3e1e3c3685f127d70027ef37185644e0181bee13981a5.mp4 #note1s6r…qq4y

2025-02-22 02:59:15

couple, couple, couple. #note13sx…nk7y

2025-02-21 08:22:02

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When your npub.cash receives a zap, you can withdraw the ecash by simply copying and pasting it into any Cashu wallet.

2025-02-21 04:20:34

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It is just a web browser, but with a user-controlled ID (Nostr public key) and wallet (Bitcoin).

2025-02-21 02:46:30

Offline Me needs self-controlled IDs and wallets to live in the physical world.
Online Me also first needs self-controlled IDs and wallets to live in the digital world.
Then Me can chat and browse.
In Chat, Me uses the IDs and pays for relays per message with the wallets.
In Browser, Me uses the IDs to log in to web apps and pays in Bitcoin with the wallets. https://image.nostr.build/000ac5733cdc66e38d0cd0948080d36020e3e16147cbfb77d0bea100d004bb06.jpg https://image.nostr.build/000e70d0a118e66e313d22b24d64ec44b226423dc78ccfaf5fa0fe5fac48a024.jpg

2025-02-20 11:36:56

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The relay only needs to forward both stamped and unstamped messages. Think of the relay as a post office.

2025-02-20 03:58:13

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Thank you!

2025-02-20 03:37:13

Images and videos sent in Keychat chats are end-to-end encrypted. #note1ms0…u7e2

2025-02-19 15:27:53

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We’ll look into it. Thanks for your response.

2025-02-19 14:40:13

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Thanks for replying.
In Keychat Browser, opening the npub.pro page shows the “extension login” option, allowing login as an admin successfully. However, on the Keychat.npub.pro page, the “extension login” option is not displayed. https://image.nostr.build/3c6442d29576771f8f446e36eb8d3536c5d8b8716d2500acc898e121867017bd.jpg https://image.nostr.build/31262acb1b542f46fcd6838ce400341a43bdf21c00734f7562604a06a7bb8739.jpg

2025-02-19 02:27:45

For Bitcoiners, paying per search with ecash sats would be better. #note16rs…3g6z

2025-02-18 10:14:36

Just as a person can live in a new country with only a passport and a wallet, a self-controlled ID and wallet together form the online "Me."
Then, Me can chat and browse.
In Chat, users use the ID and pay relays with the wallet on a per-use basis.
In Browser, users can log in to websites with the ID and use the wallet to pay BTC Lightning invoices. https://image.nostr.build/000ac5733cdc66e38d0cd0948080d36020e3e16147cbfb77d0bea100d004bb06.jpg https://image.nostr.build/000e70d0a118e66e313d22b24d64ec44b226423dc78ccfaf5fa0fe5fac48a024.jpg

2025-02-18 03:14:52

The new version of Keychat supports Amber (NIP-55) login.
https://github.com/keychat-io/keychat-app/releases
The latest version has also been uploaded to Zapstore. https://image.nostr.build/326c80978cbf4a29dfee39091be41cc8d5f89db19eb60cf59c07f92cb2dd72c3.jpg

2025-02-17 07:42:42

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We use WebView to integrate a web browser within Keychat.
We believe that the spatial structure of the web is its unique advantage, and it is also a strength of npub.pro.

2025-02-17 07:38:35

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Keychat browser uses WebView.

2025-02-17 01:02:38

A Nostr note can only achieve a limited spatial structure by quoting another note, just as this post quotes another post. #note1x3a…0vma

2025-02-16 14:06:19

Nostr mainly uses temporal structure to organize information, whereas the Web employs both temporal and spatial structures.
Npub.pro endows Nostr with a spatial structure, allowing users to organize premium notes by category. https://video.nostr.build/10a9b3145c36347bf0ad79475c807b6a4905c8dbc9ddd5fd16cced30faba44f0.mp4

2025-02-14 12:43:54

If you haven’t explored the News relay created by @npub1utx…50e8 yet, it’s worth a look. https://video.nostr.build/b78eebc55ca3a4cc0c3818646888401c9035df070ae41e283b13959c23180f6d.mp4

2025-02-12 02:27:53

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#note1dwn…p8ad

2025-02-11 14:53:05

If we follow the approach of PC browsers, mainstream mobile browsers do not support public key login and Lightning Network wallets, so browser plugins should be developed to implement these features.
However, if an online self (ID + wallet) has already been established, the browser can be treated as a plugin. Moreover, this browser is just a WebView. #note1mjw…lny3

2025-02-11 14:17:55

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Do you mean user-customized avatars?

2025-02-11 14:10:39

The Keychat browser enables an outstanding user experience for web apps that support public key login or Lightning Network payments.
We can expect to see more and more such web apps emerging. #note1eyf…4u0g

2025-02-11 12:34:11

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Is Nostr-double-ratchet compatible with the libsignal of the Signal protocol?

2025-02-11 06:43:04

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I'm afraid that a native browser is required to support UDP and TCP sockets. The goal of the Keychat browser is to facilitate interactions with websites and web apps that support Npub login or Lightning Network payments in the simplest way possible. Essentially, Keychat functions as an ID+Wallet plugin for browsers.

2025-02-08 12:31:46

Bitcoin is the house of value. Humans should dwell on it. #note1z9n…j2ps

2025-02-08 01:51:39

I chat, I browse, I own me. https://image.nostr.build/142fe2a4c6623c51bac9f0126685af437579a005b8531d2bf4b23eebe5bb9ab3.jpg

2025-02-07 10:36:18

Purchasing Mullvad VPN using the built-in Cashu wallet in Keychat is very easy. https://video.nostr.build/380d4be9d79bb86462bbb4c31409fdab56b86a243ef8ac63a9d318027fca5960.mp4

2025-02-06 15:26:47

Stablecoin is a bridge; humans cannot dwell on it. #note1eql…mxqq

2025-02-06 03:30:18

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#note1t90…lycf

2025-02-06 03:26:58

The following notes answer questions such as, “What sets Keychat apart from other applications? Isn’t it just reinventing the wheel?” #note1dmz…xtgk

2025-02-06 01:47:45

The new version of Keychat has added a browser tab.
Users can log into the website using their ID and pay Lightning Network invoices with the built-in cashu wallet.
We will release the iOS version as soon as possible.
Android APK download:
https://github.com/keychat-io/keychat-app/releases https://image.nostr.build/9d7304cf751874a704cee35e7fb2ca24adde9d032abc96fdcfa85f14cb7e7ba9.jpg https://image.nostr.build/03ee22145b797e7d3a085a5d1823dec8aa1c3cc97a721d1f5612660a32ca4292.jpg https://image.nostr.build/1020d01fd9e508d955a3104ffa1734f8b124289c0660c7ca84b87658bce9ec2e.jpg https://image.nostr.build/d3e25403b0685bdb6b5626f00d4379b2ab69aae3e976003202637cb13cbf9ca3.jpg

2025-02-05 11:15:51

@npub1ces…t37c Could an “open wallet” button be added to the Lightning Network invoice page?
This would let users pay directly using wallet, eliminating the need to copy and paste the invoice. https://video.nostr.build/f369afd0599ef8fd0395d3afff176fd592040512f2a2527ca7419d80be5d0d51.mp4

2025-02-05 07:50:30

@npub1kmw…xqk9 Could an “open wallet” button be added to the Lightning Network invoice page?
This would let users pay directly using wallet, eliminating the need to copy and paste the invoice. https://video.nostr.build/d26aad285f6ecd3c2b09ce7ea1e7391675f6d5caed1765c960e6290d10c5d757.mp4

2025-02-05 01:20:10

This is the way Keychat users interact with Chachi.👇 https://video.nostr.build/482e1891e522e12b290fcfa0446290d55b940fe600946316c7971d55c3bb3545.mp4

2025-02-04 16:19:17

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Plz check this note.
#nevent1q…j20j

2025-02-04 16:02:07

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We’re testing nip55 and aren’t 100% sure if it’s fully compatible with Keychat yet, but it should be fine.

2025-02-04 15:41:34

Any website or web app that supports nip7 extension login or Lightning Network invoice payments—whether it’s a Nostr web client or not—can enjoy an enhanced user experience in the Keychat Browser. #note1jc5…u6w4

2025-02-04 12:27:08

Once one’s online self is established, his two most common online activities thereafter are chatting and browsing (including using web apps).
Chat applications are the most popular in the smartphone era, while browsers defined the PC era. #note144u…r524

2025-02-04 11:10:35

Keychat is not only a Nostr protocol client, but also a web protocol client and a Cashu protocol client. #note144u…r524

2025-02-04 10:00:15

Keychat’s Browser provides the best browser for all Nostr web clients.
They only need to support nip7 extension login and Lightning Network invoice payments. #note1c2l…2x3s

2025-02-04 09:53:38

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#note1c2l…2x3s

2025-02-04 09:53:10

User-controlled IDs and wallets are the cornerstones of Chat and Browser.
In Chat, users need an ID and use a wallet to pay relays on a per-use basis.
In Browser, users can log in to websites and web apps with their ID (for history and state), and use a wallet to pay Lightning Network invoices to purchase services. #note1vc7…5nkf

2025-02-04 08:46:23

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#note1gzd…8fc6

2025-02-04 08:43:45

The new version of Keychat has added a browser tab.
Users can log into the website using their ID and pay Lightning Network invoices with the built-in cashu wallet.
We will release the iOS version as soon as possible.
Android APK download:
https://github.com/keychat-io/keychat-app/releases/tag/1.26.5+6319 https://image.nostr.build/93db385f3b4c2466e5806627c4921cf4d6ff9bc18c3f1b0e884e7594cefbc282.jpg https://image.nostr.build/c093e843de8e9aaa180559cabfbcf40068f1513af4d35afbe415691aa0830c43.jpg https://image.nostr.build/b79993beedc13805f5138b5370af71db8faf76e94112ab7e93aadeed8ca697cd.jpg https://image.nostr.build/0479f9c366064e80a2dda4b8be7f3b340e3aee3214c8078dc71f3d8c95c0db91.jpg #note1vc7…5nkf

2025-01-30 03:46:25

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We use the Flutter framework, so we should be able to build a Linux version.