Try Superstables
Give your agent a budget to pay for services within a limit you approve. Explore payments across test networks with an open-source client, or start with a single purchase you approve in your wallet.
Even on testnet, your wallet signs real transactions. Use a wallet that holds no real funds.
Two ways to try
Single purchase
Approve every payment in your wallet.
Your agent shows you the terms, you approve that purchase in your wallet, and the agent checks the result. You can use the service again with a new approval.
Budgets
Approve a spending permission.
Your agent can make multiple compatible purchases within the limit you approve, without per-payment approval.
On superstables.com or on your machine
On superstables.com
Approve on the Superstables site for the easiest way to buy services and approve budgets.
On your machine
Keep your setup local: approve budgets and single purchases on your machine with the open-source Superstables client.
Test chains
Base Sepolia
Arc Testnet
Arbitrum Sepolia
Polygon Amoy
SKALE Base Sepolia
Ethereum Sepolia
Tempo Moderato
Solana devnet
Payment routes vary by network. Your agent guides you through the wallet and test funds needed for your chosen route.
FAQ
What do I need?
A command-capable agent with Node 20 or later and a browser wallet. Your agent helps you choose a payment route and get the right test funds. Approvals on superstables.com use Ethereum sign-in, including for Solana payments.
Where do I get test funds?
Your agent guides funding for your chosen network. Get started lists the wallet requirements and test-fund links.
Test funds
Faucets give free test funds to the address you enter. Some need an account or a verification check, which you complete yourself, not your agent.
We read these faucets' terms on their public pages on 2 October 2026. Their limits can change.
Base Sepolia
- Test USDC: Circle faucet. Choose Base Sepolia and paste your wallet's address. No account needed; it may show a reCAPTCHA check. 20 test USDC per request, once every 2 hours per address on each network.
- Base Sepolia ETH: Coinbase Developer Platform faucet. Needs a Coinbase Developer Platform account and sign-in. 0.0001 Base Sepolia ETH per claim, up to 1,000 claims a day.
- Base Sepolia ETH: QuickNode faucet. No account, mainnet balance or X post needed; you complete a verification check. Once every 12 hours per wallet. It shows the amount after you enter your address.
Arc Testnet
- Test USDC, which also pays the network fee: Circle faucet. Choose Arc Testnet and paste your wallet's address. No account needed; it may show a reCAPTCHA check. 20 test USDC per request, once every 2 hours per address on each network.
Does a budget approve every payment?
A budget authorizes multiple compatible purchases within its on-chain permission. EVM and Solana enforce a total amount; Tempo can also enforce expiry and seller restrictions. With a single purchase, you approve each payment in your wallet, including when you use a service again.
Demo / testnet services
Choose a service, then check how you can pay.
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Most services work with a budget or as a single purchase. If a service supports only one way, your agent tells you before paying.
Third-party payment terms checked 30 September 2026; Brickken checked 4 October. Their output was not verified by those checks. Demos marked sample output return fixed examples.
Each single purchase you approve on superstables.com can be at most 0.05 in the service's test token. These payments across all networks have a combined daily limit of 1, counted in USDC and pathUSD token units and reset at midnight UTC. You can't change these limits.