early access

Build any payment flow
you can think of

Subscriptions, e-commerce, invoices, donations, tickets, scripts. Host it, embed it, or call it from your API. Anyone — agent or human — pays in USDC. 0% Xenarch fee.

Join the waitlist See the rail
Six building blocks
subscription

Recurring billing

Monthly, weekly, yearly. Customers authorize once, payments fire on schedule.

SaaS · newsletters · API tiers
checkout

One-off product

Fixed price for a deliverable. Customer pays, you ship.

digital downloads · courses · physical goods
invoice

Billed to a buyer

Named, addressed, with line items and a due date.

B2B services · consulting · contractor work
donation

Open amount

Payer picks how much. Optional suggested tiers. Anonymous or named.

tips · sponsorships · nonprofits
ticket

Scarce, time-bound

Capped supply, expiry date. Each sale unique and verifiable.

events · access passes · early bird
link

Generic payment

The simplest possible: an amount, a wallet, a URL. Pay, done.

tip jars · bounties · ad-hoc invoices
Integrate how you want
Hosted

Share a URL. We host the checkout.

Pick a kind, set price, share the link. Anyone with a wallet pays in USDC.

xenarch.com/l/abc123
For: donations · tip jars · one-off checkout · ad-hoc invoicing
Embedded

Drop checkout into your site

Script tag, React component, WordPress plugin, Shopify app. Checkout lives inside your UI — same wallet receives.

<script src="https://xenarch.com/embed.js"></script>
For: e-commerce · paywalls · SaaS signup · existing storefronts
API & SDK

Build payment flows from code

Create subscriptions, invoices, tickets, donations programmatically. Webhooks for every state change — paid, failed, refunded, expired.

xenarch.payments.create({ kind: 'subscription', ... })
For: B2B billing · automated invoicing · usage-based pricing · custom backends
Agent-callable

Every payment is an x402 endpoint

The same URL agents can hit programmatically. No UI required. Same MCP and SDK as the rest of Xenarch — AI agents pay your invoices, subscriptions, anything.

xenarch_pay("https://xenarch.com/l/abc123")
For: AI agent commerce · autonomous purchasing · agent-to-agent payments
Early access

Join the waitlist

We're inviting builders in small batches as each kind ships. Subscriptions and checkouts first; invoices, donations, and tickets follow. Tell us what you'd build — it helps us prioritise.

No spam, no list resale.
Questions
What is Xenarch Payments?
A hosted payment surface for sellers on USDC. Six building blocks — subscription, checkout, invoice, donation, ticket, generic link — each one a hosted URL anyone can pay. Combine them to assemble any payment flow: SaaS, e-commerce, B2B invoices, donations, events. Settles wallet-to-wallet, 0% Xenarch fee.
Who pays — humans or agents?
Both. A Payment Link is also an x402 endpoint, so agents pay it programmatically via the Xenarch agent SDK; humans pay through the hosted checkout page. Same link, same wallet receives the USDC.
What does early access mean?
Payments is in active development. We're inviting builders from the waitlist in small batches as the dashboard reaches each kind. Subscriptions and checkouts ship first.
Is there a fee?
0%. Same architecture as the rest of the rail — no Xenarch contract in the money flow. Payment goes wallet-to-wallet on-chain.
What if I'm already on the agent or gating waitlists?
Sign up separately for Links — the kinds and rollout schedule are independent.