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> For a complete documentation index, see https://docs.getkard.com/2024-10-01/api/users/get/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.getkard.com/_mcp/server.

# Get User By ID

GET https://rewards-api.getkard.com/v2/issuers/{organizationId}/users/{userId}

Call this endpoint to fetch the details on a specified user.

Required scopes:  `user:read`

Reference: https://docs.getkard.com/api/users/get

## Authentication

- `Authorization` header (bearer token, required) — Bearer authentication of the form `Bearer <token>`, where token is your auth token.

## Servers

- `https://rewards-api.getkard.com` (Production, default)
- `https://test-rewards-api.getkard.com` (Sandbox)

## Request

### Path parameters

- `organizationId` (string, required) — Your issuer organization ID, provided by Kard
- `userId` (string, required) — The ID of the user as defined on the issuers system

## Response

### 200

- `data` (UserRequestDataUnion, required)

## Errors

### 401 Unauthorized Error

- `errors` (list of ErrorObject, required)

### 500 Internal Server Error

- `errors` (list of ErrorObject, required)

### 404 Does Not Exist Error

- `errors` (list of ErrorObject, required)

## Types

### UserRequestDataUnion

- `type`: `user`
  - `attributes` (UserRequestAttributes, required)
  - `id` (string, required) — The ID of the user as defined on the issuers system

### ErrorObject

- `status` (string, required) — Status code returned from the request
- `title` (string, required) — Name of error
- `detail` (string, required) — Description of the specific occurance of the error
- `source` (ErrorSource, optional) — An object containing a reference to the primary source of the error
- `id` (string, optional) — The id of the resource which caused the error. Always returned for multi-status errors.

### UserRequestAttributes

- `enrolledRewards` (list of enum, required) — Rewards programs to enroll the user in. If an empty array is supplied, the user will not be enrolled in any programs.
  - Allowed values: `CARDLINKED`
- `zipCode` (string, optional) — Zipcode of user
- `email` (string, optional) — Email address of user
- `hashedEmail` (string, optional) — Hashed email address of user (using SHA-256)
- `phoneNumber` (string, optional) — Phone number of user in E.164 format
- `birthYear` (string, optional) — Birth year of user
- `historicalTransactionsSent` (boolean, optional) — Indicates whether historical transactions have been sent for this user

### ErrorSource

- `pointer` (string, optional) — A JSON pointer to the value in the request document that caused the error
- `parameter` (string, optional) — A string indicating which URI query parameter caused the error
- `header` (string, optional) — A string indicating the name of a single request header which caused the error

## Examples

**Response**

```json
{
  "data": {
    "type": "user",
    "attributes": {
      "enrolledRewards": [
        "CARDLINKED"
      ],
      "zipCode": "11238",
      "email": "user@example.com",
      "hashedEmail": "a94a8fe5ccb19ba61c4c0873d391e987982fbbd3e2d8a5b76e45a1d4c4e2e3a1",
      "phoneNumber": "+14155552671",
      "birthYear": "1990",
      "historicalTransactionsSent": true
    },
    "id": "1234567890"
  }
}
```

**SDK Code**

```python
import requests

url = "https://rewards-api.getkard.com/v2/issuers/organization-123/users/user-123"

headers = {"Authorization": "Bearer <token>"}

response = requests.get(url, headers=headers)

print(response.json())
```

```javascript
const url = 'https://rewards-api.getkard.com/v2/issuers/organization-123/users/user-123';
const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go
package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://rewards-api.getkard.com/v2/issuers/organization-123/users/user-123"

	req, _ := http.NewRequest("GET", url, nil)

	req.Header.Add("Authorization", "Bearer <token>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby
require 'uri'
require 'net/http'

url = URI("https://rewards-api.getkard.com/v2/issuers/organization-123/users/user-123")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Get.new(url)
request["Authorization"] = 'Bearer <token>'

response = http.request(request)
puts response.read_body
```

```java
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.get("https://rewards-api.getkard.com/v2/issuers/organization-123/users/user-123")
  .header("Authorization", "Bearer <token>")
  .asString();
```

```php
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('GET', 'https://rewards-api.getkard.com/v2/issuers/organization-123/users/user-123', [
  'headers' => [
    'Authorization' => 'Bearer <token>',
  ],
]);

echo $response->getBody();
```

```csharp
using RestSharp;

var client = new RestClient("https://rewards-api.getkard.com/v2/issuers/organization-123/users/user-123");
var request = new RestRequest(Method.GET);
request.AddHeader("Authorization", "Bearer <token>");
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = ["Authorization": "Bearer <token>"]

let request = NSMutableURLRequest(url: NSURL(string: "https://rewards-api.getkard.com/v2/issuers/organization-123/users/user-123")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "GET"
request.allHTTPHeaderFields = headers

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```