# GET /documentprocessing/barcodes/maximumtextlength

> Get the maximum number of characters a barcode type can encode, such as 3700 for a QR code: pass barcodeType in the query string and get the length as a number.

- **Product:** DS Server
- **Section:** Documentation
- **Kind:** Endpoint
- **Path:** DS Server > API Reference > Web API > DocumentProcessing > /barcodes/maximumtextlength > GET /documentprocessing/barcodes/maximumtextlength
- **889 words**
- **Web URL:** https://docs.textcontrol.com/ds-server/reference/web-api/documentprocessing/barcodes-maximumtextlength/get/
- **LLMs URL:** https://docs.textcontrol.com/ds-server/reference/web-api/documentprocessing/barcodes-maximumtextlength/get/llms.txt
- **LLMs-Full URL:** https://docs.textcontrol.com/ds-server/reference/web-api/documentprocessing/barcodes-maximumtextlength/get/llms-full.txt

---

`GET` `https://example.com/documentprocessing/barcodes/maximumtextlength`

### Description

Returns the maximum text length that can be encoded.

### Examples

The following example returns the maximum text length for a QR code.

```bash
# Request:
curl --location --request GET 'https://trial.dsserver.io/documentprocessing/barcodes/maximumtextlength?barcodeType=qrcode' \
    --header 'Authorization: Bearer fePFHv8OtIyRSCAdOnn7USc9kKdYB2rg'

# Result:
3700
```

### Authorization

This endpoint supports the OAuth authorization method. DS Server checks the access token only when OAuth is enabled in the admin portal (see [Enable OAuth](https://docs.textcontrol.com/ds-server/administration/oauth/llms-full.txt)). With OAuth disabled, the default of a new installation, the endpoint accepts requests without a token.

DS Server implements OAuth as the authorization method. Two flows are supported:

- Authorization Code
- Client Credentials

To use the *Client Credentials* flow, switch on **Allow “Client Credentials” grant type** in the security profile (see [OAuth Grant Types](https://docs.textcontrol.com/ds-server/administration/oauth-grant-types/llms-full.txt)).

In both cases, a valid access token returned from the OAuth endpoints must be passed in a *Bearer* **Authorization Header**, as a **Query Parameter** or in a **Cookie**.

#### Authorization Header

| Header field | Description |
|---|---|
| Authorization | A Bearer authorization header (also called token authentication) contains the OAuth access token. The authorization method and a space i.e. "Bearer " is then put before your valid access token. For example: `Authorization: Bearer 4796E23054E64BC773CACBCAF24AD179DE9A3` |

#### Query Parameter

| Query parameter | Description |
|---|---|
| access\_token | The access token is passed directly in the endpoint URL as a query string. For example: `?access_token=4796E23054E64BC773CACBCAF24AD179DE9A3` |

#### Cookie

| Cookie | Description |
|---|---|
| access\_token | The access token is passed in a cookie named `access_token`. For example: `Cookie: access_token=4796E23054E64BC773CACBCAF24AD179DE9A3` |

### Request Parameters

| Name | Type | Value | Optional |
|---|---|---|---|
| barcodeType | String | A string that specifies the barcode type. Possible values are: "QRCode", "Code128", "EAN13", "UPCA", "EAN8", "Interleaved2of5", "Postnet", "Code39", "AztecCode", "IntelligentMail", "Datamatrix", "PDF417", "MicroPDF", "Codabar", "FourState", "Code11", "Code93", "PLANET", "RoyalMail", "Maxicode". | no |

### Success Response

| Status | Description |
|---|---|
| 200 | On success, the HTTP status code in the response header is 200 (OK). The response body contains the maximum text length. |

### Error Response

| Status | Description |
|---|---|
| 401 | A 401 (Unauthorized) with an empty body is returned, if OAuth is enabled and the request has no valid access token. |
| 405 | A 405 (Method Not Allowed) with an empty body and the header `Allow: GET` is returned for any other HTTP method, for example `POST`. |
| 400 | A 400 (Bad Request) is returned, if DS Server is not licensed or the license is invalid. On a server that is not registered, the body is the plain text `DS Server is not registered.` (`text/plain`). DS Server checks the license before the parameter values. |
| 400 | A 400 (Bad Request) is returned, if the barcode type is not valid. |

---

## Nearby

- **Previous:** [/documentprocessing/barcodes/maximumtextlength](https://docs.textcontrol.com/ds-server/reference/web-api/documentprocessing/barcodes-maximumtextlength/llms-full.txt)
- **Next:** [/documentprocessing/barcodes/minimumtextlength](https://docs.textcontrol.com/ds-server/reference/web-api/documentprocessing/barcodes-minimumtextlength/llms-full.txt)