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---
title: Status response codes
weight: 6
last_reviewed_on: 2019-11-12
review_in: 6 weeks
---
# Status response codes
The Document Checking Service (DCS) uses standard [HTTP response code][HTTP-Status-Code] conventions.
| HTTP response code | Description |
| ------------------ | -------------------------------------- |
| 200 | The DCS handled your request successfully. |
| 404 | The DCS URI is incorrect. |
| 429 | You have exceeded your allocated number of API calls. |
| 503 | HM Passport Office is having a planned outage. |
| 5xx | There is an internal server error. |
Note that the `HTTP 200` response code means the DCS handled your request successfully. It does not confirm whether the passport is valid or not. Likewise, an `HTTP 200` does not necessarily mean that the DCS is operational.
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