generated: '2026-07-21'
method: searched
source: https://docs.paytweed.com/developer-tools/supported-blockchains
environments:
  - name: production
    sdk_value: Environment.production
    notes: Production integrations use Environment.production in the core SDKs.
  - name: demo
    sdk_value: Environment.demo
    notes: >-
      Demo/test integrations use Environment.demo; demo mode runs against
      testnet chains only.
demo_chains:
  # Chains flagged "Demo" on the supported-blockchains page (testnets)
  - { id: arbitrumSepolia, name: Arbitrum Sepolia Testnet }
  - { id: avaxFuji, name: Avax Fuji Testnet }
  - { id: beamTestnet, name: Beam Testnet }
  - { id: bnbTestnet, name: BNB Testnet }
  - { id: ethereumSepolia, name: Ethereum Sepolia Testnet }
  - { id: fantomTestnet, name: Fantom Testnet }
  - { id: fuseSpark, name: Fuse Spark Testnet }
  - { id: polygonMumbai, name: Polygon Mumbai Testnet }
  - { id: solanaDevnet, name: Solana Devnet }
  - { id: tezosGhost, name: Tezos Ghost Testnet }
live_examples:
  - url: https://demo.paytweed.com
    status: 200
    notes: >-
      Tweed's hosted demo (wallets + payments, free-minting and paid checkout
      with ERC20 settlement). Source was published at
      github.com/paytweed/demo-v2-next, which now returns 404.
  - url: https://events.paytweed.com
    status: 200
    notes: Wallets + payments demo showcasing free minting.
fixtures:
  - name: demo NFT checkout variants
    docs: https://docs.paytweed.com/developer-tools/tweed-sdks/payments-sdks-v1/backend-sdk-payments
    notes: >-
      The Backend SDK guide publishes demo checkout payloads (demo-freemint,
      demo-paidmint-native at 0.01 MATIC, demo-paidmint-erc20 with a fake USDC
      token) on the polygonAmoy chain, including a hosted demo token image at
      paytweed-assets.s3.amazonaws.com/pinky.png.
notes: >-
  No magic test card numbers are published; card payments are processed via
  Stripe under the hood (docs reference Stripe Radar and Stripe-shaped
  paymentData in webhook payloads). Test-vs-live separation is by SDK
  environment (demo vs production) and testnet chain selection rather than by
  key prefix.