> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mitwirken.me/llms.txt
> Use this file to discover all available pages before exploring further.

# Errors

> Troubleshoot problems with this comprehensive breakdown of all error codes.

## Error schema

We use standard HTTP response codes for success and failure notifications, and our errors are further classified by type.
​

### `validation_error`

* **Status:** 400
* **Message:** We found an error with one or more fields in the request.
* **Suggested action:** The message will contain more details about what field and error we found.
  ​

### `missing_api_key`

* **Status:** 401
* **Message:** Missing API key in the authorization header.
* **Suggested action:** Include the following header in the request: `Authorization: Bearer YOUR_API_KEY`.
  ​

### `restricted_api_key`

* **Status:** 401
* **Message:** This API key is restricted to only get members.
* **Suggested action:** Make sure the API key has `Full access` to perform actions other than getting members.
  ​

### `validation_error`

* **Status:** 403
* **Message:** N/A
* **Suggested action:** N/A
  ​

### `not_found`

* **Status:** 404
* **Message:** The requested endpoint does not exist.
* **Suggested action:** Change your request URL to match a valid API endpoint.
  ​

### `invalid_attachment`

* **Status:** 422
* **Message:** Attachment must have either a `content` or `path`.
* **Suggested action:** Attachments must either have a `content` (strings, Buffer, or Stream contents) or `path` to a remote resource (better for larger attachments).
  ​

### `missing_required_field`

* **Status:** 422
* **Message:** The request body is missing one or more required fields.
* **Suggested action:** Check the error message to see the list of missing fields.
  ​

### `daily_quota_exceeded`

* **Status:** 429
* **Message:** You have reached your daily Mitwirken sending quota.
* **Suggested action:** Upgrade your plan to remove the daily quota limit or wait until 24 hours have passed to continue sending.
  ​

### `rate_limit_exceeded`

* **Status:** 429
* **Message:** Too many requests. Please limit the number of requests per second. Or [contact support](mailto:support@mitwirken.me) to increase rate limit.
* **Suggested action:** You should read the response headers and reduce the rate at which you request the API. This can be done by introducing a queue mechanism or reducing the number of concurrent requests per second. If you have specific requirements, contact support to request a rate increase.
  ​

### `security_error`

* **Status:** 451
* **Message:** We may have found a security issue with the request.
* **Suggested action:** The message will contain more details. [Contact support](mailto:support@mitwirken.me) for more information.
  ​

### `application_error`

* **Status:** 500
* **Message:** An unexpected error occurred.
* **Suggested action:** Try the request again later. If the error does not resolve, check our status page for service updates.