# Errors

Common errors include:

#### 400 Bad Request

Invalid request payload, missing required fields, or invalid status transition.

```json
{
  "error": "Invalid transaction status transition"
}
```

#### 401 Unauthorized / 403 Forbidden

Missing or invalid authentication token or API key.

```json
{
  "error": "Invalid API key"
}
```

#### 404 Not Found

The requested ledger, account, transaction, or user was not found.

```json
{
  "error": "Account not found"
}
```

#### 409 Conflict

Resource conflict or duplicate state.

#### 500 Internal Server Error

Unexpected server-side failure.


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.senmo.io/segment-ledger/errors.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.