.id() URL-encodes email addresses, breaking /contact/{email} and /contactdata/{email} endpoints

[mlevison]

When using .id() with an email address to access the /contact/{email} or /contactdata/{email} endpoints, the SDK URL-encodes the @ symbol (→ %40), causing a 400 error: "Invalid action for resource "ContactData" : "user@example.com"".

The Mailjet REST API accepts email addresses in the URL path for these endpoints — this works correctly via curl but fails through the SDK.

Steps to reproduce

const Mailjet = require('node-mailjet');
const client = Mailjet.apiConnect(apiKey, secretKey, {
  config: { version: 'v3' },
});

// This fails with 400
const response = await client
  .get('contactdata/{email}')
  .id('user@example.com')
  .request();

// Same failure with contact endpoint
const response2 = await client
  .get('contact/{email}')
  .id('user@example.com')
  .request();

Error

Unsuccessful: Status Code: "400" Message: "Invalid action for resource "ContactData" : "user@example.com"."

Expected behavior

The SDK should pass the email as-is in the URL path: https://api.mailjet.com/v3/REST/contactdata/user@example.com

Actual behavior

The SDK encodes the @ → %40: https://api.mailjet.com/v3/REST/contactdata/user%40example.com

Proof that the REST API accepts emails in the path (curl works)

# GET contact by email — works
curl -s -u "$API_KEY:$SECRET_KEY" \
  "https://api.mailjet.com/v3/REST/contact/user@example.com"

# PUT contactdata by email — works
curl -s -X PUT -u "$API_KEY:$SECRET_KEY" \
  -H "Content-Type: application/json" \
  -d '{"Data": [{"Name": "my_property", "Value": "hello"}]}' \
  "https://api.mailjet.com/v3/REST/contactdata/user@example.com"

Workaround

Use fetch directly instead of the SDK for these endpoints.

Environment

• node-mailjet version: 6.0.11
• Node.js version: v22.x