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PUT
https://api.karmapay.xyz/v0
/
v0
/
end-users
/
:externalUserId
curl -X PUT 'https://api.karmapay.xyz/v0/end-users/user_123' \
  -H 'Authorization: Bearer karma_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx' \
  -H 'Content-Type: application/json' \
  -d '{
    "email": "[email protected]"
  }'

{
  "data": {
    "id": "770e8400-e29b-41d4-a716-446655440000",
    "externalUserId": "user_123",
    "email": "[email protected]",
    "applicantId": "abc123xyz789",
    "bridgeCustomerId": "cus_abc123",
    "createdAt": "2025-10-31T12:00:00Z"
  }
}
Authentication: Business API Key

​
Path Parameters

​
externalUserId
string
required
Your internal user ID

​
Request Body

​
email
string
New email address for the end-user

​
Response

​
data
object
curl -X PUT 'https://api.karmapay.xyz/v0/end-users/user_123' \
  -H 'Authorization: Bearer karma_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx' \
  -H 'Content-Type: application/json' \
  -d '{
    "email": "[email protected]"
  }'

{
  "data": {
    "id": "770e8400-e29b-41d4-a716-446655440000",
    "externalUserId": "user_123",
    "email": "[email protected]",
    "applicantId": "abc123xyz789",
    "bridgeCustomerId": "cus_abc123",
    "createdAt": "2025-10-31T12:00:00Z"
  }
}