Vellar Playground

Learn x402 by doing it, for real.

A playground for external developers to visually try out the Vellar x402 payment facilitator on Stellar testnet — get a real funded wallet, then work through the lessons below. Real settlements, real refusals, everything inspectable.

Your wallet

Learn the flow

First payment

Pay a real API and inspect every byte on the wire.

Ownership verification

A resource's ownership binding, once proven, can't be taken back.

Break it

Break payments

Five deliberate corruptions of a real signed payment, every one refused.

Poison catalog

Three poisoning attempts against the Bazaar's real catalog.

Discovery

Bazaar catalog

Every resource the facilitator has seen, with a real Pay button on each.

Learn

Quest

A five-level challenge track through everything above.

Bond system

How Vellar closes the gap between settlement and delivery.

Tools

Status

Live facilitator health, supported schemes, sponsor signer.

Console

Every facilitator endpoint, raw.