Environment

Phase one of on-chain trading runs on a preview host against Base Sepolia. It is a test environment: the tokens have no value and the database can be reset. On this host every order in OOM or USDC must carry an EIP-712 LimitOrderIntent signed by the Safe owner. HMAC alone cannot create an order. Production (https://api.futuur.com) does not accept the on-chain fields yet.

Host

	Value
API base URL	`https://web3-phase-01-preview.staging.cloud.futuur.com/v2.0`
OpenAPI schema	`https://web3-phase-01-preview.staging.cloud.futuur.com/docs/schema/`
Trading halt flag	`GET /v2.0/trading-status/` (no auth) returns `trading_halted`

Paths end with a trailing slash, for example POST /v2.0/orders/.

Chain

	Value
Network	Base Sepolia
Chain ID	`84532`
Public RPC	`https://sepolia.base.org`
ERC-4337 EntryPoint (v0.7)	`0x0000000071727De22E5E9d8BAf0edAc6f37da032`

chain_id is optional on every endpoint that takes it and defaults to the active chain. A different value is rejected. Base mainnet (8453) is not active on this host.

Tokens and pool

Role	Address	Decimals	Notes
`USDC` collateral	`0xA10E77cF8E1F71a44D374646AF5fd9641C5161Bd`	6	A mintable mock USDC (MUSDC), not Circle USDC
`OOM` collateral	`0x9e89a2c1dA308052EFAF590e71bEfF256AF9F7a4`	6	Restricted ERC-20. Transfers and spenders are allowlisted by the token admin
Pool (clearing Safe and `approve` spender)	`0xbC42f13000Da4D895cB5dD9375511846332A5053`	—	Holds collateral between match and payout

Treat the API as the source of truth for these addresses. POST /orders/signing-context/ and GET /me/safe/trading-status/ return poolAddress and collateralToken for your request. Use those values when you build an approve, and stop if they differ from this table.

Amounts on-chain use 6 decimals for both tokens: 1 USDC = 1000000 raw units.

Get test funds

Asset	How
OOM	Minted to your Safe by the platform after the Safe is deployed. A new account receives 10,000 OOM. You cannot mint OOM yourself.
USDC (MUSDC)	Minted by Futuur staff. Ask the Futuur team for a test mint to your Safe address. `[PLACEHOLDER: contact channel for test USDC]`
Gas	UserOperations sent through the Futuur relay (`/me/safe/sponsor-user-operation/`) can be sponsored, so the Safe does not need ETH for them.

Check what arrived with GET /me/safe-wallet/?refresh=1 and GET /me/balances/.

Account requirements

Your account has a wallet_address (the owner EOA). You get one by signing in with that wallet.
Your Safe is registered and deployed. See Safe wallet.
Trading is enabled once per currency (a standing approve to the pool).
For USDC orders signed with HMAC, Real money trading is turned on for the API key, and the event allows real money. Otherwise create returns 403 RealMoneyBetNotAllowed.

What is live

Feature	Phase one
`POST /api-keys/derive/` (wallet → HMAC keys)	Live
`POST /orders/signing-context/`	Live
`POST /orders/` with a signed intent, `gtc` and `ioc`	Live
Cancel, batch cancel, cancel all	Live
Order book, events, markets, wagers, balances	Live
Safe registration, relay, enable trading	Live
Collateral settlement on-chain at match	Live, asynchronous
Resolution payout Pool → Safe	Live, automatic
Pusher websockets	Live. `[PLACEHOLDER: Pusher app key and cluster for the preview host]`

What is not live

Feature	Status
Market orders (`price: null`) in `OOM` or `USDC`	Cannot be signed. Use `time_in_force: "ioc"` with a price
`shares: "max"` in `OOM` or `USDC`	Do not rely on it. The signed `sharesRaw` must equal the resolved quantity, so send explicit shares
`POST /orders/batch/` and `POST /orders/batch-update/` in `OOM` or `USDC`	Not the supported path. Each item needs its own signed intent, and a host that does not read intent fields on batch items rejects them. Loop over `POST /orders/`
`GET /orders/{id}/`	Does not exist. Filter `GET /orders/`
Fills or trades endpoint	Does not exist. Read fills from the order fields or the `order-update` websocket event
Selling with `PATCH /wagers/{id}/`	Rejected for on-chain positions (`onchain_sell_requires_limit_order`). Place a signed `ask`
Deposit endpoint for Safe balances	None. Transfer tokens to your Safe on-chain
Withdrawing with an API key	Not available. A `USDC` withdrawal from the Safe goes through the relay with a wallet sign-in session. See Safe wallet
Withdrawing `OOM`	Not available
ERC-1155 outcome tokens, split and merge	Not in phase one. Shares stay in the Futuur database
Base mainnet	Not active

Get Started

Core Concepts

On-chain trading

Guides

Host

Chain

Tokens and pool

Get test funds

Account requirements

What is live

What is not live

Next steps

​Host

​Chain

​Tokens and pool

​Get test funds

​Account requirements

​What is live

​What is not live

​Next steps

Host

Chain

Tokens and pool

Get test funds

Account requirements

What is live

What is not live

Next steps