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

# Errors

> Technical errors and what they mean.

## 401 unauthorized

The secret is missing, wrong or revoked. Copy the connection URL again from the zapbip number, or ask for a new agent. With the Bearer form, the header is `Authorization: Bearer <secret>`.

## The message is queued

`delivery: "queued"` means the [24-hour window](https://docs.zapbip.com/features/the-24-hour-window.md) is closed. The message waits and arrives, in order, as soon as you write to the zapbip number.

## Upload errors

The bytes are rejected before anything is stored:

| Status | Cause |
| - | - |
| 411 | `PUT` without a `Content-Length` |
| 413 | Body larger than the declared `size_bytes` |
| 415 | A type that does not match the declared `mime_type` |
| 410 | The upload expired after 15 minutes |

See [create\_upload](https://docs.zapbip.com/mcp-reference/create-upload.md).


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