Off Ramp URL Cenerator

Off Ramp URL Generator

Build a signed Off Ramp page URL for browser redirect (not an API request).

1. Redirect parameters

Off Ramp page integration: all URL parameters are signed; type is fixed to sell; timestamp is auto-generated; sign is appended last.

Base URL

Test

ramptest.alchemypay.org

Prod

ramp.alchemypay.org

Signing Secret

appSecret

Signed locally only; not sent with the request.

Required Parameters

appId, type (sell), timestamp, merchantOrderNo, crypto, cryptoAmount, network, and sign are required. Parameters are signed in dictionary key order; empty values are excluded.

appIdRequired

merchantOrderNoRequired

cryptoRequired

cryptoAmountRequired

networkRequired

Optional Parameters

fiatOptional

countryOptional

emailOptional

tokenOptional

languageOptionalDefaulten-USzh-HKesviid

showTableOptionalsellNone

callbackUrlOptional

merchantNameOptional

withdrawUrlOptional

urlTypeOptionalNonewebapp

Sign & Generate

2. Signature result

Final URL format: Base URL + sorted query string + sign.

Request URL

-

Sorted query string (without sign)

-

String to sign

-

sign-String (raw Base64)

-