## Documentation Index

Fetch the complete documentation index at: [/llms.txt](https://docs.cognigy.com/llms.txt)

Use this file to discover all available pages before exploring further.

DELETE

/v2.0/lexicons/{lexiconId}

### Delete a Lexicon

**cURL**

```
curl --request DELETE \
  --url https://api-trial.cognigy.ai/new/v2.0/lexicons/{lexiconId} \
  --header 'X-API-Key: <api-key>'
```

**Python**

```
import requests

url = "https://api-trial.cognigy.ai/new/v2.0/lexicons/{lexiconId}"

headers = {"X-API-Key": "<api-key>"}

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

print(response.text)
```

**JavaScript (Fetch API)**

```
const options = {method: 'DELETE', headers: {'X-API-Key': '<api-key>'}};

fetch('https://api-trial.cognigy.ai/new/v2.0/lexicons/{lexiconId}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));
```

**PHP**

```
<?php

$curl = curl_init();

curl_setopt_array($curl, [\
  CURLOPT_URL => "https://api-trial.cognigy.ai/new/v2.0/lexicons/{lexiconId}",\
  CURLOPT_RETURNTRANSFER => true,\
  CURLOPT_ENCODING => "",\
  CURLOPT_MAXREDIRS => 10,\
  CURLOPT_TIMEOUT => 30,\
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,\
  CURLOPT_CUSTOMREQUEST => "DELETE",\
  CURLOPT_HTTPHEADER => [\
    "X-API-Key: <api-key>"\
  ],\
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}
?>
```

**Go**

```
package main

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

func main() {

url := "https://api-trial.cognigy.ai/new/v2.0/lexicons/{lexiconId}"

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

req.Header.Add("X-API-Key", "<api-key>")

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

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

fmt.Println(string(body))
}
```

### Possible Responses

- `204`: Successfully deleted the resource.

#### Error Codes

- `400`: Bad Request
- `401`: Unauthorized
- `403`: Forbidden
- `404`: Not Found
- `500`: Internal Server Error

### Error Response Example

```json
{
  "type": "Bad Request",
  "title": "Bad Request Error",
  "status": 400,
  "detail": "Validation failed. Missing payload.",
  "instance": "/v2.0/flows/5ce7c2d833ea1e04d7e6c432",
  "code": 1000,
  "traceId": "api--f84324f4-98eb-4f02-abdd-375a2e6c3c1f",
  "details": {}
}
```

### Parameters

#### Headers
- **X-API-Key** *(required)*: Supply the API Key in the HTTP-Header.

#### Path Parameters
- **lexiconId** *(string, required)*: The unique identifier for the Lexicon. Required string length: `24`. Pattern: `^[a-z0-9]{24}$`.

### Final Notes
Last modified on July 8, 2026.