Open source.
Read the code, build on it, or create your own implementation. Paykit’s Rust libraries are MIT-licensed.
Explore the codePay. Get paid.
Leave the how to Paykit.
Paykit is an open protocol for coordinating payments across existing payment rails. Users choose who to pay. Paykit figures out how — finding shared payment rails.
ANIMATED ILLUSTRATION
Pay a person.Let your wallet handle the payment logistics.
“How can I pay you?” shouldn’t be a conversation. Paykit lets your wallet figure out these details for you.
Different people. Different payment options.
Alice
BTCLightningUSDT
USD
USDGBPBob
ETH
EURCHF
BTCETHAlice and Bob each use their own wallets and payment services.
Paused
Illustrative payment options, not a list of supported integrations. Apps choose which payment methods they support.
OPEN IN EVERY WAY
Open by design.
Interoperable.
Paykit is an open protocol. Any wallet, payment provider, point-of-sale system, online store, or service can integrate it and coordinate payments with other compatible apps.
Read the protocolDecentralized.
Paykit runs on Pubky, so you can host your own data and stay fully in control. PKARR keeps you discoverable—no registration or permission required.
Your data, your choiceSelf-sovereign by design. Decentralized discovery and independently operated homeservers reduce reliance on a single gatekeeper, helping Paykit resist censorship.
WHAT PAYKIT MAKES POSSIBLE
Shared payment features.
Across payment rails.
Have the functionality you need - independent of the underlying payment rail.
Recurring payments
Agree on repeating payment requests with clear amounts and billing periods. Your wallet manages the schedule, while you stay in control and can stop recurring payments at any time.
Allowances
Let your wallet handle approved requests within agreed limits. Set spending caps or expiry, and end an allowance when needed.
Private payment details
Share receiving details with a specific contact through an encrypted connection, alongside the payment methods you choose to make public.
Requests and receipts
Keep the context with the payment. Exchange requests, payment proofs, and encrypted receipts between Paykit-enabled apps.
Available features depend on your wallet or service. Your wallet controls payment approval, scheduling, and execution.
TAKE IT FOR A SPIN
See Paykit in action.
Pick up a compatible wallet, create a payment page, or try a purchase. Meet the apps bringing Paykit to life.
THE REFERENCE WALLET
Pay your contacts with Bitkit.
Try Paykit with Bitkit, the self-custodial Bitcoin, Lightning and Tether wallet. Paykit support is available from version 3.0.
Get BitkitRECEIVE PAYMENTS
Payky.
One link. Every way to pay you.
Bring your payment methods together on a page built on your Pubky identity. Set it up, then share your link.
Create your Payky pageMORE INTEGRATIONS AHEAD
+++
Your wallet could be here.
An open protocol has room for everyone. Bring Paykit to your wallet or service and help connect the ecosystem.
Let’s build togetherPUT IT TO WORK
Explore Pubky Market Meet the Pubky Market.
Explore stores run by independent sellers and try a purchase with Bitkit.
Temporary demo URL · Access may be requiredDATA YOU CONTROL
Your data.
Your choice.
Convenient payments shouldn’t need a central address book. Paykit builds on Pubky, a decentralized protocol that puts identity and data in your hands.
Keep payment data on a homeserver you choose—or run yourself. Your public-key identity stays yours, independently of a wallet provider.
Publish the payment options you want people to find, or share private details through encrypted channels. Paykit also encrypts receipts before storing them on a homeserver.
Explore Pubky
Decentralized discovery. A homeserver you choose—or run yourself.
LUGANO, SWITZERLAND · 23–24 OCT 2026
Meet us in Lugano
Let’s talk Paykit.
Find us at the Synonym booth at Plan ₿ Forum. Come say hello, bring your questions, and join our Paykit workshop.
Get in touch Explore Plan ₿ ForumYOU’RE INVITEDWORKSHOP
Paykit: A new Payment Protocol Paradigm
WHENSaturday, 24 October
16:15–17:00 CEST
WHEREUTXO Room
Plan ₿ Forum, Lugano
With Ben Kaufman & Denys Zaliskyi
Find it on the conference agendaA FEW GOOD QUESTIONS
Clear things up.
Is Paykit a wallet?+
Paykit is an open payment coordination protocol. Wallets and services integrate it to discover someone’s payment methods and exchange the details needed to pay them. You keep using your wallet to approve and send payments.
Does Paykit hold my money?+
No. Paykit coordinates payment information. Funds move through the payment method your wallet uses, and your wallet handles your keys and payment approval.
Which payment methods can I use?+
That depends on the wallet or service you use and the methods the recipient accepts. Bitkit’s Paykit integration supports on-chain Bitcoin, Lightning and USDT on Arbitrum One. Available options depend on wallet setup and the recipient. Paykit’s endpoint format can describe other payment methods, so apps can add support for their own use cases.
Are all my payment details public?+
You can publish payment methods for others to discover. Paykit also supports exchanging private details through encrypted channels. What is published or shared depends on the app and how you use it.
Can anyone integrate Paykit?+
Yes. It’s an open protocol with open-source implementations. Explore the specifications and code, or get in touch about adding Paykit to your wallet, service, or application.
LET’S CONNECT
Your next payment
idea starts here.
Building a wallet? Adding payments to a service? Or just curious? We’d love to hear what you have in mind.
info@synonym.to