> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.zip.tax/v-6-0/api-reference/merchant-nexus/list/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.zip.tax/_mcp/server.

# List Nexus Locations

POST https://api.zip-tax.com/merchant/nexus/list
Content-Type: application/json

Available on Pro and Enterprise PlansReturns a merchant's recorded nexus locations. Deleted locations are not included.Available to self-managed merchants only; a TaxCloud-connected merchant returns 403, and their nexus is read through the Management API instead.

Reference: https://docs.zip.tax/api-reference/merchant-nexus/list

## Authentication

- `X-API-KEY` header (required) — API Key authentication via header

## Request

### Body (application/json)

This endpoint expects an object.

- `merchantId` (string, required) — UUID of the merchant whose locations to list. Must be owned by the calling account and must be self-managed.
- `nexusType` (enum, optional) — Restricts the response to one kind of nexus. Omit it to return every kind. Only 'physical' is supported; 'economic' is rejected with 400, because those rows carry a registration id instead of an address and do not fit this response shape (ZIP-1214).
  - Allowed values: `physical`, `economic`

## Response

### 200

OK

- `merchantId` (string, required) — UUID of the merchant the locations belong to.
- `locations` (list of NexusLocationOutput, optional) — The merchant's recorded locations. An empty array when the merchant has none, which means no physical nexus is being tracked for them.

## Errors

### 400 Merchant Nexus List Body Bad Request Error

Bad Request

- `detail` (string, optional) — A human-readable explanation specific to this occurrence of the problem.
- `errors` (list of ErrorDetail, optional) — List of individual error details
- `instance` (string, optional) — A URI reference that identifies the specific occurrence of the problem.
- `status` (long, optional) — HTTP status code
- `title` (string, optional) — A short, human-readable summary of the problem type. This value should not change between occurrences of the error.
- `type` (string, optional, default: about:blank) — A URI reference to human-readable documentation for the error.

### 401 Merchant Nexus List Body Unauthorized Error

Unauthorized

- `detail` (string, optional) — A human-readable explanation specific to this occurrence of the problem.
- `errors` (list of ErrorDetail, optional) — List of individual error details
- `instance` (string, optional) — A URI reference that identifies the specific occurrence of the problem.
- `status` (long, optional) — HTTP status code
- `title` (string, optional) — A short, human-readable summary of the problem type. This value should not change between occurrences of the error.
- `type` (string, optional, default: about:blank) — A URI reference to human-readable documentation for the error.

### 403 Merchant Nexus List Body Forbidden Error

Forbidden

- `detail` (string, optional) — A human-readable explanation specific to this occurrence of the problem.
- `errors` (list of ErrorDetail, optional) — List of individual error details
- `instance` (string, optional) — A URI reference that identifies the specific occurrence of the problem.
- `status` (long, optional) — HTTP status code
- `title` (string, optional) — A short, human-readable summary of the problem type. This value should not change between occurrences of the error.
- `type` (string, optional, default: about:blank) — A URI reference to human-readable documentation for the error.

### 404 Merchant Nexus List Body Not Found Error

Not Found

- `detail` (string, optional) — A human-readable explanation specific to this occurrence of the problem.
- `errors` (list of ErrorDetail, optional) — List of individual error details
- `instance` (string, optional) — A URI reference that identifies the specific occurrence of the problem.
- `status` (long, optional) — HTTP status code
- `title` (string, optional) — A short, human-readable summary of the problem type. This value should not change between occurrences of the error.
- `type` (string, optional, default: about:blank) — A URI reference to human-readable documentation for the error.

### 422 Merchant Nexus List Body Unprocessable Entity Error

Unprocessable Entity

- `detail` (string, optional) — A human-readable explanation specific to this occurrence of the problem.
- `errors` (list of ErrorDetail, optional) — List of individual error details
- `instance` (string, optional) — A URI reference that identifies the specific occurrence of the problem.
- `status` (long, optional) — HTTP status code
- `title` (string, optional) — A short, human-readable summary of the problem type. This value should not change between occurrences of the error.
- `type` (string, optional, default: about:blank) — A URI reference to human-readable documentation for the error.

### 429 Merchant Nexus List Body Too Many Requests Error

Too Many Requests

- `detail` (string, optional) — A human-readable explanation specific to this occurrence of the problem.
- `errors` (list of ErrorDetail, optional) — List of individual error details
- `instance` (string, optional) — A URI reference that identifies the specific occurrence of the problem.
- `status` (long, optional) — HTTP status code
- `title` (string, optional) — A short, human-readable summary of the problem type. This value should not change between occurrences of the error.
- `type` (string, optional, default: about:blank) — A URI reference to human-readable documentation for the error.

### 500 Merchant Nexus List Body Internal Server Error

Internal Server Error

- `detail` (string, optional) — A human-readable explanation specific to this occurrence of the problem.
- `errors` (list of ErrorDetail, optional) — List of individual error details
- `instance` (string, optional) — A URI reference that identifies the specific occurrence of the problem.
- `status` (long, optional) — HTTP status code
- `title` (string, optional) — A short, human-readable summary of the problem type. This value should not change between occurrences of the error.
- `type` (string, optional, default: about:blank) — A URI reference to human-readable documentation for the error.

### 503 Merchant Nexus List Body Service Unavailable Error

Service Unavailable

- `detail` (string, optional) — A human-readable explanation specific to this occurrence of the problem.
- `errors` (list of ErrorDetail, optional) — List of individual error details
- `instance` (string, optional) — A URI reference that identifies the specific occurrence of the problem.
- `status` (long, optional) — HTTP status code
- `title` (string, optional) — A short, human-readable summary of the problem type. This value should not change between occurrences of the error.
- `type` (string, optional, default: about:blank) — A URI reference to human-readable documentation for the error.

## Types

### NexusLocationOutput

- `address` (string, required) — The normalized address resolved when the location was written, not the string you sent.
- `isFulfillmentOrigin` (boolean, required) — Whether goods ship from this location.
- `locationId` (string, required) — Server-issued identifier for this location. Use it with /merchant/nexus/update and /merchant/nexus/delete.
- `locationType` (enum, required) — What kind of presence this location represents.
  - Allowed values: `office`, `store`, `warehouse`, `inventory_fba`, `employee`, `property`, `temporary`
- `name` (string, required) — Your own label for this location. Empty when none was supplied.
- `referenceId` (string, required) — The ID you use in your own system to identify this location. Empty when none was supplied.
- `registered` (boolean, required) — Whether the merchant is registered to collect sales tax in this location's state.

### ErrorDetail

- `location` (string, optional) — Where the error occurred, e.g. 'body.items[3].tags' or 'path.thing-id'
- `message` (string, optional) — Error message text
- `value` (any, optional) — The value at the given location

## Examples

**Request**

```json
{
  "merchantId": "merchantId"
}
```

**Response**

```json
{
  "merchantId": "merchantId",
  "locations": [
    {
      "address": "1401 Lavaca St, Austin, TX 78701-1634, United States",
      "isFulfillmentOrigin": true,
      "locationId": "6dc371de-00a4-44bf-8a88-2bcab2f15041",
      "locationType": "office",
      "name": "TestCo Texas Distribution Center",
      "referenceId": "warehouse-123",
      "registered": true
    }
  ]
}
```

**SDK Code**

```python
import requests

url = "https://api.zip-tax.com/merchant/nexus/list"

payload = { "merchantId": "merchantId" }
headers = {
    "X-API-KEY": "<apiKey>",
    "Content-Type": "application/json"
}

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

print(response.json())
```

```javascript
const url = 'https://api.zip-tax.com/merchant/nexus/list';
const options = {
  method: 'POST',
  headers: {'X-API-KEY': '<apiKey>', 'Content-Type': 'application/json'},
  body: '{"merchantId":"merchantId"}'
};

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"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.zip-tax.com/merchant/nexus/list"

	payload := strings.NewReader("{\n  \"merchantId\": \"merchantId\"\n}")

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

	req.Header.Add("X-API-KEY", "<apiKey>")
	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
require 'uri'
require 'net/http'

url = URI("https://api.zip-tax.com/merchant/nexus/list")

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

request = Net::HTTP::Post.new(url)
request["X-API-KEY"] = '<apiKey>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"merchantId\": \"merchantId\"\n}"

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.post("https://api.zip-tax.com/merchant/nexus/list")
  .header("X-API-KEY", "<apiKey>")
  .header("Content-Type", "application/json")
  .body("{\n  \"merchantId\": \"merchantId\"\n}")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.zip-tax.com/merchant/nexus/list', [
  'body' => '{
  "merchantId": "merchantId"
}',
  'headers' => [
    'Content-Type' => 'application/json',
    'X-API-KEY' => '<apiKey>',
  ],
]);

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

```csharp
using RestSharp;

var client = new RestClient("https://api.zip-tax.com/merchant/nexus/list");
var request = new RestRequest(Method.POST);
request.AddHeader("X-API-KEY", "<apiKey>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"merchantId\": \"merchantId\"\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = [
  "X-API-KEY": "<apiKey>",
  "Content-Type": "application/json"
]
let parameters = ["merchantId": "merchantId"] as [String : Any]

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

let request = NSMutableURLRequest(url: NSURL(string: "https://api.zip-tax.com/merchant/nexus/list")! 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()
```