Prepare

POST /v1/authorizations/prepare Prepares the contract information for agreement-based payment scenarios. Returns an authUrl to pass to my.call("signContract") in the Mini Program.

Request Parameters

referenceClientId

string

required

Merchant identifier used to distinguish different businesses.Max length: 16 characters

scopes

string

required

Permission scope. Value: AGREEMENT_PAYMax length: 16 characters

extendInfo

string

JSON object containing contract details.Max length: 4096 characters

Show extendInfo fields

Field	Type	Required	Max	Description
contractTitle	String	M	64	Title displayed on the authorization page
contractDesc	String	M	2048	Description shown to the user
agreedAmount	Amount	O	—	Single transaction amount limit
startTime	String	O	—	First deduction date (`yyyy-MM-dd` format)
contractStatusNotifyUrl	String	O	—	Webhook URL for contract status updates
paymentFrequency	String	O	—	Deduction frequency: `DAILY`, `WEEKLY`, `MONTHLY`, `QUARTERLY`, or `YEARLY`
amountType	String	O	—	Amount type: `VARIABLE` or `FIXED`
maxAmount	Amount	O	—	Maximum amount per transaction

Response Parameters

result

object

required

Standard result object with resultCode, resultStatus, resultMessage

authUrl

string

Authorization URL to pass to my.call("signContract") in the Mini Program.Max length: 256 characters

Result Codes

resultStatus	resultCode	Description
`S`	`SUCCESS`	Contract prepared successfully
`F`	`PARAM_ILLEGAL`	Invalid parameters
`F`	`INVALID_AUTH_CLIENT`	Invalid client ID
`F`	`INVALID_AUTH_CLIENT_STATUS`	Auth client status issue
`F`	`INVALID_SCOPE`	Invalid scope value
`F`	`AUTH_CLIENT_UNSUPPORT_SCOPE`	Client does not support requested scope
`F`	`REDIRECT_URL_NOT_MATCH`	Redirect URL is not permitted
`U`	`UNKNOWN_EXCEPTION`	API failure

OpenAPIs

Message Transmission Security

OpenAPIs for Merchants

Reference

Request Parameters

Response Parameters

Result Codes

​Request Parameters

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​Result Codes

Request Parameters

Response Parameters

Result Codes