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Before you can place orders or manage collateral on Upside , you must register your wallet address using the registerAccount action. A successful registration returns a unique accountId — a decimal integer that identifies your account across every subsequent API call. You only need to register once per wallet address.
In gated environments, registration requires a valid invite code. Pass inviteCode at the envelope top level — alongside action, signature, and nonce — not inside the action object. The invite code is not included in the signed payload.

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Request

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Action Fields

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string
required
Must be the fixed string "registerAccount".
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string
required
The wallet address you are registering. Must be 0x-prefixed and contain exactly 40 lowercase hexadecimal characters (EIP-55 checksummed addresses are also accepted).

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Envelope-Level Fields

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string
A 6-character alphanumeric invite code. Required in gated environments; silently ignored in open environments. Do not include this field inside action — it must sit at the top level of the request body alongside action, signature, and nonce. It is not part of the signature.

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Response

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string
Your new account’s unique identifier, encoded as a decimal string representing an int64. Store this value — you will need it for collateral operations, order placement, and any action that references your account.
Even though accountId is returned as a string, it is a 64-bit integer. Use a big-integer or string type in your client to avoid precision loss in JavaScript environments.

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Error Reference

If you attempt to register the same wallet address twice, the server returns ACCOUNT_ALREADY_EXISTS. To retrieve an existing account’s accountId, query the read API instead of re-registering.

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Next Steps

1

Save your accountId

Store the returned accountId securely in your application config or database. All collateral and position operations reference it.
2

Enroll in a market deployer

You are automatically enrolled in the default market deployer on registration. To trade contracts in additional environments, call enrollUserToMarketDeployer.
3

Lock collateral

Deposit collateral into your chosen market deployer with lockCollateral before placing any orders.
4

Place your first order

Once collateral is in place, use the order action to open a perpetual position.