--- title: Try Superstables | Superstables description: Try agent payments with a budget or a single purchase, using the open-source client. Approve on your machine or on superstables.com, on test networks, with test tokens only. canonical: https://www.superstables.com/testnet last-updated: 2026-10-02 --- # 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. [Get started](https://www.superstables.com/get-started) [Open source on GitHub](https://github.com/superstables/superstables-client) ## 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. ## Networks - Base Sepolia - Ethereum Sepolia - Arc Testnet - Tempo Moderato - Solana devnet Payment routes vary by network. Your agent guides you through the wallet and test funds needed for your chosen route. ### Setup details for agents ### Base Sepolia Single purchase and budgets. Chain ID 84532. Explorer: https://sepolia.basescan.org - Test USDC, for purchases and budgets. - For a budget: Base Sepolia ETH in your wallet for the fee of granting it, and a little to send your agent for its own transactions. ### Arc Testnet Single purchase and budgets. Chain ID 5042002. Explorer: https://explorer.testnet.arc.io - Test USDC, for purchases and budgets. For a budget it also pays the network fee, for you and for your agent; for a single purchase the facilitator pays the fee. Payment routes vary by network. Your agent guides you through the wallet and test funds needed for your chosen route. ## 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](https://faucet.circle.com). 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](https://portal.cdp.coinbase.com/products/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](https://faucet.quicknode.com/base/sepolia). 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](https://faucet.circle.com). 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. ## Demo / testnet services Choose a service, then check how you can pay. | Service | Description | Network | Price | Run by | Example request | |---|---|---|---|---|---| | Superstables demo market data | BTC or ETH prices and daily changes from Coinbase. | Base Sepolia | 0.01 USDC | Superstables | https://www.superstables.com/api/demo/market?asset=BTC | | Superstables demo market data on Arc | BTC or ETH prices and daily changes from Coinbase. | Arc Testnet | 0.01 USDC | Superstables | https://www.superstables.com/api/demo/market/arc?asset=BTC | | Superstables demo market data on Tempo | BTC or ETH prices and daily changes from Coinbase. | Tempo Moderato | 0.001 pathUSD | Superstables | https://www.superstables.com/api/demo/market/tempo?asset=BTC | | Superstables demo market data on Solana | BTC or ETH prices and daily changes from Coinbase. | Solana devnet | 0.01 USDC | Superstables | https://www.superstables.com/api/demo/market/solana?asset=BTC | | Wallet briefing (sample output) | Balances and activity for a sample wallet. | Base Sepolia | 0.003 USDC | Superstables | https://www.superstables.com/api/demo/services/wallet-briefing?sample_wallet=demo-active | | Token and contract screening (sample output) | Risk checks for a sample token contract. | Base Sepolia | 0.005 USDC | Superstables | https://www.superstables.com/api/demo/services/contract-screening?token_id=sample-usdc-base | | Web search (sample output) | Sample search results about agent payments. | Base Sepolia | 0.003 USDC | Superstables | https://www.superstables.com/api/demo/services/web-search?query_id=x402-facilitators | | Whitepaper extraction (sample output) | Key points from a sample whitepaper. | Base Sepolia | 0.005 USDC | Superstables | https://www.superstables.com/api/demo/services/whitepaper-extraction?document_id=sample-lending-protocol | | Specialist research (sample output) | A sample research brief about agent payments. | Base Sepolia | 0.02 USDC | Superstables | https://www.superstables.com/api/demo/services/specialist-research?topic_id=agent-payment-rails | | Image creation (sample output) | A sample image for a fixed brief. | Base Sepolia | 0.02 USDC | Superstables | https://www.superstables.com/api/demo/services/image-creation?brief_id=launch-poster | | Audio transcription (sample output) | A sample transcript with speakers and timestamps. | Base Sepolia | 0.01 USDC | Superstables | https://www.superstables.com/api/demo/services/audio-transcription?clip_id=standup-2026-09-14 | | Product lookup (sample output) | Sample products compared within a price limit. | Base Sepolia | 0.003 USDC | Superstables | https://www.superstables.com/api/demo/services/product-search?query_id=usb-c-hub | | Job search (sample output) | Sample job listings by role and region. | Base Sepolia | 0.003 USDC | Superstables | https://www.superstables.com/api/demo/services/job-search?role_id=solidity-engineer | | Website performance check (sample output) | A sample page's performance and suggested fixes. | Base Sepolia | 0.005 USDC | Superstables | https://www.superstables.com/api/demo/services/website-performance?page_id=sample-landing | | Weather | Current weather for a location. | Base Sepolia | 0.001 USDC | wallets-demo-seller-server.calebgcarithers.workers.dev | https://wallets-demo-seller-server.calebgcarithers.workers.dev/weather?location=San%20Francisco | | Web page to Markdown | Converts a public web page to Markdown. | Base Sepolia | 0.005 USDC | url2md-testnet.url2md.workers.dev | https://url2md-testnet.url2md.workers.dev/v1/md?url=https%3A%2F%2Fexample.com | | Market news | Recent market news for a market, such as equities. | Base Sepolia | 0.001 USDC | omniterminal.app | https://omniterminal.app/api/x402/v1/news?market=equities&limit=5 | | Repository scan | The toolchain and basic facts of a public GitHub repository. | Base Sepolia | 0.01 USDC | verdoc-x402.verdoc-x402-worker.workers.dev | https://verdoc-x402.verdoc-x402-worker.workers.dev/scan?repo=sindresorhus%2Fgot | | FDIC bank lookup | Looks up a bank in FDIC records. | Base Sepolia | 0.01 USDC | tollbooth-fdic-verify-testnet.sjwilliams8.workers.dev | https://tollbooth-fdic-verify-testnet.sjwilliams8.workers.dev/verify?name=Bank%20of%20America | | Stablecoin bridge flows | Reports stablecoin transfers between networks. | Base Sepolia | 0.01 USDC | x402-stablecoin-data-demo.ryan-ee4.workers.dev | https://x402-stablecoin-data-demo.ryan-ee4.workers.dev/v1/reports/stablecoin-bridge-flows?chain_uid=ethereum&coin_uid=tether¤cy=usd&flow_type=bridge&timeframe=7d | | Japanese business day | Whether a date is a business day in Japan. | Base Sepolia | 0.01 USDC | torii-gateway-staging.ichis-lab.workers.dev | https://torii-gateway-staging.ichis-lab.workers.dev/v1/jp-biz-calendar/is-business-day?date=2026-09-30 | | Official print | Published figures for gold, Treasury bills or funds. | Arc Testnet | 0.05 USDC | watchevelive.com | https://www.watchevelive.com/print?q=gold | | Oracle facts | Facts from Urban Game Theory's data service. | Solana devnet | 0.01 USDC | api.urbangametheory.xyz | https://api.urbangametheory.xyz/agent/oracle/facts | | Brickken sandbox | Lists the owner's registered agents. | Ethereum Sepolia | 0.000001 USDC | api.sandbox.brickken.com | https://api.sandbox.brickken.com/get-agents?chainId=11155111&ownerWalletAddress=0xef8435204e98F920E3EDc2b648f454807278969A | 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. ## For agents - Services a budget can pay (JSON): https://www.superstables.com/api/v1/budget/services - Services for a single purchase (JSON): https://www.superstables.com/api/v1/purchase/services - Get started for agents: https://www.superstables.com/start.md