> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.getsinbad.com/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.getsinbad.com/_mcp/server.

# Add a payment account

POST https://us-central1-sinbad-staging-env.cloudfunctions.net/b2b-v1/v1/me/payment-methods
Content-Type: application/json

Add a payment account.

**Credential:** Customer session

**Before you call**

- A customer session for the same partner, integration, customer, wallet and chain.

Catalog-required fields are enforced and duplicate identities return PAYMENT_METHOD_ALREADY_EXISTS.

> Confirm with Sinbad that this endpoint is enabled in your environment.

**Errors**

| Status | Code | What to do |
| --- | --- | --- |
| 400 | `VALIDATION_ERROR` | Correct the fields reported in details before retrying. |
| 401 | `UNAUTHENTICATED` | Create a new customer session or use a valid server credential. |
| 403 | `FORBIDDEN` | Check credential ownership, integration and the supplied Origin. |
| 409 | `CONFLICT` | Read the current state again before you prepare or retry. |
| 503 | `UPSTREAM_ERROR` | Retry with backoff; preserve the same idempotency key for a repeated mutation. |

Reference: https://docs.getsinbad.com/api-reference/payment-accounts/create-saved-payment-method

## Authentication

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

## Request

### Body (application/json)

This endpoint expects an object.

- `paymentMethodId` (string, required)
- `data` (map from string to string, required)
- `displayLabel` (string, optional)

## Response

### 201

Created

- `id` (string, required)

## Errors

### 400 Bad Request Error

The request is invalid.

- `error` (V1MePaymentMethodsPostResponsesContentApplicationJsonSchemaError, required)

### 401 Unauthorized Error

Authentication is required.

- `error` (V1MePaymentMethodsPostResponsesContentApplicationJsonSchemaError, required)

### 403 Forbidden Error

You do not have permission to perform this action.

- `error` (V1MePaymentMethodsPostResponsesContentApplicationJsonSchemaError, required)

### 409 Conflict Error

The request conflicts with the current state of the resource.

- `error` (V1MePaymentMethodsPostResponsesContentApplicationJsonSchemaError, required)

### 503 Service Unavailable Error

Service temporarily unavailable.

- `error` (V1MePaymentMethodsPostResponsesContentApplicationJsonSchemaError, required)

## Types

### V1MePaymentMethodsPostResponsesContentApplicationJsonSchemaError

- `code` (string, required)
- `numericId` (integer, required)
- `message` (string, required)
- `requestId` (string, optional)
- `details` (map from string to any, optional)

## Examples

**Request**

```json
{
  "paymentMethodId": "bank_transfer",
  "data": {
    "accountNumber": "EXAMPLE123456"
  },
  "displayLabel": "My bank"
}
```

**Response**

```json
{
  "id": "account_demo"
}
```

**SDK Code**

```python Default
import requests

url = "https://us-central1-sinbad-staging-env.cloudfunctions.net/b2b-v1/v1/me/payment-methods"

payload = {
    "paymentMethodId": "bank_transfer",
    "data": { "accountNumber": "EXAMPLE123456" },
    "displayLabel": "My bank"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.json())
```

```javascript Default
const url = 'https://us-central1-sinbad-staging-env.cloudfunctions.net/b2b-v1/v1/me/payment-methods';
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: '{"paymentMethodId":"bank_transfer","data":{"accountNumber":"EXAMPLE123456"},"displayLabel":"My bank"}'
};

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

```go Default
package main

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

func main() {

	url := "https://us-central1-sinbad-staging-env.cloudfunctions.net/b2b-v1/v1/me/payment-methods"

	payload := strings.NewReader("{\n  \"paymentMethodId\": \"bank_transfer\",\n  \"data\": {\n    \"accountNumber\": \"EXAMPLE123456\"\n  },\n  \"displayLabel\": \"My bank\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

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

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

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

}
```

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

url = URI("https://us-central1-sinbad-staging-env.cloudfunctions.net/b2b-v1/v1/me/payment-methods")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"paymentMethodId\": \"bank_transfer\",\n  \"data\": {\n    \"accountNumber\": \"EXAMPLE123456\"\n  },\n  \"displayLabel\": \"My bank\"\n}"

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

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

HttpResponse<String> response = Unirest.post("https://us-central1-sinbad-staging-env.cloudfunctions.net/b2b-v1/v1/me/payment-methods")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"paymentMethodId\": \"bank_transfer\",\n  \"data\": {\n    \"accountNumber\": \"EXAMPLE123456\"\n  },\n  \"displayLabel\": \"My bank\"\n}")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://us-central1-sinbad-staging-env.cloudfunctions.net/b2b-v1/v1/me/payment-methods', [
  'body' => '{
  "paymentMethodId": "bank_transfer",
  "data": {
    "accountNumber": "EXAMPLE123456"
  },
  "displayLabel": "My bank"
}',
  'headers' => [
    'Authorization' => 'Bearer <token>',
    'Content-Type' => 'application/json',
  ],
]);

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

```csharp Default
using RestSharp;

var client = new RestClient("https://us-central1-sinbad-staging-env.cloudfunctions.net/b2b-v1/v1/me/payment-methods");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Bearer <token>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"paymentMethodId\": \"bank_transfer\",\n  \"data\": {\n    \"accountNumber\": \"EXAMPLE123456\"\n  },\n  \"displayLabel\": \"My bank\"\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift Default
import Foundation

let headers = [
  "Authorization": "Bearer <token>",
  "Content-Type": "application/json"
]
let parameters = [
  "paymentMethodId": "bank_transfer",
  "data": ["accountNumber": "EXAMPLE123456"],
  "displayLabel": "My bank"
] as [String : Any]

let postData = JSONSerialization.data(withJSONObject: parameters, options: [])

let request = NSMutableURLRequest(url: NSURL(string: "https://us-central1-sinbad-staging-env.cloudfunctions.net/b2b-v1/v1/me/payment-methods")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

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()
```