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Every app can build a tokenized money market fund (TMMF) integration in the WisdomTree sandbox. The sandbox uses the same API as production. Trades run on Ethereum Sepolia (testnet), with test stablecoins and test fund shares.

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How the sandbox works

Each TMMF request names its WisdomTree environment in the environment field. A request without the field uses production.
  • Sandbox: open to every app, for testing. Trades settle on Ethereum Sepolia.
  • Production: for real trades. Only apps with production access can use it. Other apps get a 403 error.
POST requests take environment in the body. GET requests take it as a query parameter. Sandbox and production data are separate. Users onboard again in production. The sandbox uses these settings:
The TMMF endpoints use your app’s credentials: privy-app-id and Authorization: Basic <credentials> with your app secret. Purchases and redemptions also need an authorization signature when the wallet has an owner.

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Integration flow

An integration follows these steps, in order.
1

Create the user and their wallet

For a business, create an organization and an organization wallet. For an individual, create a user and a wallet the user owns. In the sandbox, the wallet must be an Ethereum wallet.
2

Onboard the user with WisdomTree

Submit the organization’s KYB data or the individual’s KYC data. WisdomTree reviews the submission asynchronously. The user can trade once the status is approved.
3

Register the wallet

Register the wallet with WisdomTree on ethereum_sepolia. The wallet can trade once WisdomTree approves it.
4

Fund the wallet

Send Sepolia USDC to the wallet, for example from the Circle faucet. The wallet pays gas in Sepolia ETH unless your app has gas sponsorship configured.
5

Buy fund shares

Buy WTGXX with USDC. Privy sends the USDC to WisdomTree and tracks the order as a wallet action until the shares reach the wallet.
6

Track positions

List the wallet’s positions to show shares, their USD value, pending dividends, and pending orders.
7

Sell fund shares

Sell WTGXX for USDC. Privy sends the shares to WisdomTree and tracks the order until the proceeds reach the wallet.
Subscribe to TMMF webhooks to follow submissions, wallet registrations, and orders.

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Order types

Each order sets an order type. It decides how WisdomTree fills the order. To test a full buy and sell quickly, use secondary orders.

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Next steps

Start by onboarding the user that will trade.

Onboard businesses

Submit an organization’s KYB data to WisdomTree.

Onboard individuals

Submit an individual’s KYC data to WisdomTree.