Content, media, and generative tools an agent can commission and pay for directly.
An elite developer challenge series.
Chapter 1 runs Friday, October 16 at 8am through Saturday, October 17 at 8pm EDT.
- Prize pool:
- $20,000 USDC
- Date:
- Oct 16–17, 2026
- Format:
- In-person + Virtual
- Theme:
- Agents & PayBox
The mission
Build a plugin for the PayBox marketplace.Build a plugin for the PayBox marketplace.Build a plugin for the PayBox marketplace.
PayBox is a non-custodial credential vault for AI agents. Users connect wallets, cards, and secrets once. Agents then grant scoped, revocable authority over them. The marketplace is where agents discover the apps and services they can act on. Chapter 1 has one mission: build the plugin that gets your product into the PayBox marketplace.
Already wrapped an API in x402? You're already halfway there.
PayBox speaks x402 natively — wrap your endpoint and it works inside PayBox without a bespoke integration.
x402Pay-per-request over HTTP 402The fast lane into Chapter 1
Who’s Eligible to Participate?
Open to eligible participants worldwide.
Criteria
Every submission is judged the same way.
These are starting points, not separate competitions.
Creative
Content, media, and generative tools an agent can commission and pay for directly.
Consumer finance
Everyday money moves — saving, moving, converting — an agent can execute within policy.
Merchant tools
Checkout, invoicing, and payment flows that let an agent transact with a business.
Predictions
Markets and forecasting tools an agent can price, enter, and settle on a user's behalf.
Requirements
Two parts, both required.
Working plugin
A live PayBox marketplace plugin, functioning end to end.
Demo video
A short video showing the plugin working, posted to X.
Rewards
Two layers — one competitive, one ongoing.Two layers — one competitive, one ongoing.Two layers — one competitive, one ongoing.
Prize pool $88,888USDC
1st place
$8,888
2nd place
$8,888
3rd place
$8,888
Honorable mentions (10)
$8,888each
Illustrative split — final tiering to be confirmed.
Winner benefits
Hardware wallet
A hardware wallet for each Chapter 1 winner.
VIP access to MoonPay products
No onboarding fees across MoonPay products
GTM advisory access
Direct access to MoonPay's GTM team for advisory support.
Winners and honorable mentions also enter the PayBox Marketplace ahead of its public opening.
MoonPay Hackathons
A new mission every month.
A new chance to win.
MoonPay Hackathons: PayBox doesn't end at Chapter 1. Every month brings a new mission and new prize pool — the same series, the next challenge. Miss this one and there's another next month.