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At a glance

MainnetModerato (testnet)
Network IDtempo:mainnettempo:moderato
Native assetETHETH
Native decimals1818
StablecoinUSDCe (TIP-20)USDCe (TIP-20)
Stablecoin contract0x20c000000000000000000000b9537d11c60e8b50(Moderato equivalent)
Stablecoin decimals66
Confirmation timeAbout 2 secondsAbout 2 seconds
Typical feeSub-centFree (testnet faucet)

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Amount-only binding

Tempo is EVM-style, like Base. TIP-20 transfers don’t carry a memo, so AlgoVoi uses amount uniqueness to bind checkouts to specific transfers. Same caveats as Base: send the exact amount_microunits from the checkout response.

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TIP-20 versus ERC-20

TIP-20 is Tempo’s token standard, semantically equivalent to ERC-20 for the operations AlgoVoi cares about (transfer, transferFrom, balanceOf). The contract above is the canonical USDC bridge token, marked USDCe to distinguish it from native USDC on Ethereum mainnet.

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Wallets

EVM-compatible wallets work, configured for the Tempo network:

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AgentCash

AgentCash is the reference MPP client for Tempo. It manages a USDCe wallet on Tempo mainnet, resolves WWW-Authenticate: Payment challenges automatically, and broadcasts signed transactions — no configuration needed. 
# Install and fund
npm install -g agentcash   # or use npx
npx agentcash deposit      # get your wallet address and top up with USDCe

# Call any AlgoVoi MPP endpoint
npx agentcash fetch https://api.algovoi.co.uk/mpp/probe -m GET
npx agentcash fetch https://api.algovoi.co.uk/mpp/{tenant_short_id}/{resource_id} -m GET
Payments settle on Tempo in about 2 seconds. The AlgoVoi gateway accepts the resulting transaction hash, verifies it on-chain, and returns a JWT receipt.

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See also

  • Base for the other EVM chain we support
  • x402 protocol for the payment protocol layer
  • MPP protocol for method-level paywalls and AgentCash integration