REST Credentials support integration with any available REST endpoints and send requests during user verification for interaction.

The REST Credential is a method used by Galxe to pull data from your RESTful HTTPS backend (or any legally accessible HTTP RESTful endpoint). It takes a single wallet address as input and outputs 1 (eligible) or 0 (not eligible) to determine whether the wallet address qualifies.

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Workflow

  1. app.galxe.com: When a user clicks “Verify” on the Quest page, Galxe sends the user’s wallet address or other social media information as an input parameter.
  2. Galxe Backend: Based on the pre-configuration, Galxe sends an HTTP request containing the wallet address to your REST API and waits for the response.
  3. Your Backend: After receiving the HTTP request from Galxe, your backend processes the request and returns the response data related to the wallet address.
  4. Galxe Backend: Processes the response.body from your backend using predefined expressions to determine if the user meets the conditions.
    35.185.209.0 and 35.203.155.18 are our outbound IPs. Failure to whitelist these may result in 403 errors when accessing the service.

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Configuration Requirements

API Specification

  • Endpoint:
    The URL of the REST endpoint.
We only support the default ports for HTTP and HTTPS (80 and 443).
  • (Optional) Headers: Key-value pairs included in the REST request.

Parameter Mapping (Placeholders)

  • $address: Replaced with the user’s wallet address as a hexadecimal string with the 0x prefix, e.g., 0x95ad73....
  • $addressWithout0x: Replaced with the user’s wallet address as a hexadecimal string without the 0x prefix, e.g., 95ad73..., typically used for constructing eth_call requests.
  • $value: Used when user information is not an address (email or Telegram ID) and replaced with the respective information.
For addresses encoded in case-insensitive formats (EVM or Aptos addresses starting with 0x), Galxe converts them to lowercase before sending to your endpoint.

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Data Format

Galxe supports JSON body format exclusively for both GET and POST responses.

{
  "key": "value"
}
Galxe requires requests to respond within 5 seconds; otherwise, the request will be canceled.

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Expression

Function Requirements

  1. Write an anonymous JavaScript (ES6) function with the type signature (object) => int.
  2. The function takes the entire response object resp as a parameter.
  3. It must return the number 1 or 0, indicating whether the address qualifies for the credential.

Do not return Boolean values (true/false) or strings ("0"/"1").

Anonymous Function Format

The function must be anonymous, with the first line written in the following format:

function(resp) {
  /* Function body */
}
To ensure a more secure function, always validate the structure of the resp object before accessing its properties, this helps prevent errors or unexpected behavior when the API response is incomplete or incorrectly formatted.

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Security and Authorization

When configuring the REST API, you can achieve secure access through request headers (such as API KEY or tokens). This information will not be exposed by Galxe, and only users with Space admin privileges can view it.

You should still be careful not to embed other private information in the expression encoding, as this will be made public.

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CORS

Galxe’s API calls are not made through the browser but via backend servers. Although this avoids triggering browser CORS restrictions, we still send preflight OPTIONS requests during API configuration to validate the API’s correctness. This process does not adhere to the Simple Request Convention.

For more information, visit CORS Check.
ConfigSingle Dimensional Config