# /license/validateserialstring

> The /license/validateserialstring endpoint of the DS Server Web API and its GET method, which checks the format of a DS Server serial number.

- **Product:** DS Server
- **Section:** Documentation
- **Kind:** Endpoint
- **Path:** DS Server > API Reference > Web API > Licensing > /license/validateserialstring
- **Web URL:** https://docs.textcontrol.com/ds-server/reference/web-api/licensing/validateserialstring/
- **LLMs URL:** https://docs.textcontrol.com/ds-server/reference/web-api/licensing/validateserialstring/llms.txt
- **LLMs-Full URL:** https://docs.textcontrol.com/ds-server/reference/web-api/licensing/validateserialstring/llms-full.txt

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## In This Section

- [GET /license/validateserialstring](https://docs.textcontrol.com/ds-server/reference/web-api/licensing/validateserialstring/get/llms.txt): Check the format of a serial number, two upper case letters, a dash and ten digits such as XX-0000000000: returns 200 if valid, or 400 with the rule if not.

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## Nearby

- **Previous:** [GET /license/unregister](https://docs.textcontrol.com/ds-server/reference/web-api/licensing/unregister/get/llms.txt)
- **Next:** [GET /license/validateserialstring](https://docs.textcontrol.com/ds-server/reference/web-api/licensing/validateserialstring/get/llms.txt)