> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.mercoa.com/embedded-ap-ar/api-reference/invoice/comment/create/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.mercoa.com/_mcp/server.

# Create

POST https://api.mercoa.com/invoice/{invoiceId}/comment
Content-Type: application/json

Add a comment to this invoice

Reference: https://docs.mercoa.com/embedded-ap-ar/api-reference/invoice/comment/create

## Authentication

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

## Request

### Path parameters

- `invoiceId` (string, required) — Invoice ID or Invoice ForeignID

### Body (application/json)

This endpoint expects an object.

- `text` (string, required)
- `userId` (string, optional) — The ID or the Foreign ID of the user who created the comment.

## Response

### 200

- `id` (string, required)
- `text` (string, required)
- `createdAt` (datetime, required)
- `updatedAt` (datetime, required)
- `user` (object, optional)
  - `id` (string, required)
  - `roles` (list of string, required)
  - `createdAt` (datetime, required)
  - `updatedAt` (datetime, required)
  - `foreignId` (string, optional) — The ID used to identify this user in your system.
  - `email` (string, optional)
  - `name` (string, optional)
- `associatedApprovalAction` (object, optional) — If an approval action has triggered the generation of this comment, returns the associated approval action and actor
  - `userId` (string, required)
  - `action` (enum, required)
    - Allowed values: `NONE`, `APPROVE`, `REJECT`

## Errors

### 400 Bad Request

- `errorName` ("BadRequest", required)
- `content` (string, required)

### 401 Unauthorized

- `errorName` ("Unauthorized", required)
- `content` (string, required)

### 403 Forbidden

- `errorName` ("Forbidden", required)
- `content` (string, required)

### 404 Not Found

- `errorName` ("NotFound", required)
- `content` (string, required)

### 409 Conflict

- `errorName` ("Conflict", required)
- `content` (string, required)

### 500 Internal Server Error

- `errorName` ("InternalServerError", required)
- `content` (string, required)

### 501 Unimplemented

- `errorName` ("Unimplemented", required)
- `content` (string, required)

## Examples

**Request**

```json
{
  "text": "This is a comment",
  "userId": "user_e24fc81c-c5ee-47e8-af42-4fe29d895506"
}
```

**Response**

```json
{
  "id": "ic_b3525b66-da94-4525-9f31-426bcf657128",
  "text": "This is a comment",
  "createdAt": "2021-01-01T00:00:00Z",
  "updatedAt": "2021-01-01T00:00:00Z",
  "user": {
    "id": "user_ec3aafc8-ea86-408a-a6c1-545497badbbb",
    "roles": [
      "admin",
      "approver"
    ],
    "createdAt": "2024-01-01T00:00:00Z",
    "updatedAt": "2024-01-01T00:00:00Z",
    "foreignId": "MY-DB-ID-12345",
    "email": "john.doe@acme.com",
    "name": "John Doe"
  }
}
```

**SDK Code**

```python Default
import requests

url = "https://api.mercoa.com/invoice/in_3d61faa9-1754-4b7b-9fcb-88ff97f368ff/comment"

payload = {
    "text": "This is a comment",
    "userId": "user_e24fc81c-c5ee-47e8-af42-4fe29d895506"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.json())
```

```typescript Default
import { MercoaClient } from "@mercoa/javascript";

const client = new MercoaClient({ token: "YOUR_TOKEN" });
await client.invoice.comment.create("in_3d61faa9-1754-4b7b-9fcb-88ff97f368ff", {
    text: "This is a comment",
    userId: "user_e24fc81c-c5ee-47e8-af42-4fe29d895506"
});

```

```go Default
package main

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

func main() {

	url := "https://api.mercoa.com/invoice/in_3d61faa9-1754-4b7b-9fcb-88ff97f368ff/comment"

	payload := strings.NewReader("{\n  \"text\": \"This is a comment\",\n  \"userId\": \"user_e24fc81c-c5ee-47e8-af42-4fe29d895506\"\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://api.mercoa.com/invoice/in_3d61faa9-1754-4b7b-9fcb-88ff97f368ff/comment")

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  \"text\": \"This is a comment\",\n  \"userId\": \"user_e24fc81c-c5ee-47e8-af42-4fe29d895506\"\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://api.mercoa.com/invoice/in_3d61faa9-1754-4b7b-9fcb-88ff97f368ff/comment")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"text\": \"This is a comment\",\n  \"userId\": \"user_e24fc81c-c5ee-47e8-af42-4fe29d895506\"\n}")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.mercoa.com/invoice/in_3d61faa9-1754-4b7b-9fcb-88ff97f368ff/comment', [
  'body' => '{
  "text": "This is a comment",
  "userId": "user_e24fc81c-c5ee-47e8-af42-4fe29d895506"
}',
  'headers' => [
    'Authorization' => 'Bearer <token>',
    'Content-Type' => 'application/json',
  ],
]);

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

```csharp Default
using RestSharp;

var client = new RestClient("https://api.mercoa.com/invoice/in_3d61faa9-1754-4b7b-9fcb-88ff97f368ff/comment");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Bearer <token>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"text\": \"This is a comment\",\n  \"userId\": \"user_e24fc81c-c5ee-47e8-af42-4fe29d895506\"\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift Default
import Foundation

let headers = [
  "Authorization": "Bearer <token>",
  "Content-Type": "application/json"
]
let parameters = [
  "text": "This is a comment",
  "userId": "user_e24fc81c-c5ee-47e8-af42-4fe29d895506"
] as [String : Any]

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

let request = NSMutableURLRequest(url: NSURL(string: "https://api.mercoa.com/invoice/in_3d61faa9-1754-4b7b-9fcb-88ff97f368ff/comment")! 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()
```