---
description: Tagging API error codes, causes, and resolutions.
title: Error codes
image: https://developers.cloudflare.com/og-docs.png
---

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# Error codes

Last updated Sep 1, 2026|Copy as Markdown| [View as Markdown](https://0285ca83.previews.developers.cloudflare.com/resource-tagging/reference/error-codes/index.md)| [Agent setup](https://0285ca83.previews.developers.cloudflare.com/agent-setup/)

## Error code reference

| Code | HTTP status | Message | Likely cause | Resolution |
| --- | --- | --- | --- | --- |
| `1002` | 400 | Invalid set payload | Request body is malformed or missing required fields | Verify the body is valid JSON with `resource_type`, `resource_id`, and `tags` |
| `1003` | 400 | `resource_type` and `resource_id` are required | Missing query parameters | Include both `resource_type` and `resource_id` in the query string |
| `1006` | 400 | Invalid resource type | Unsupported resource type | Use a [supported resource type](https://0285ca83.previews.developers.cloudflare.com/resource-tagging/reference/resource-types/) |
| `1007` | 400 | tag parameter must be in format... | Tag filter syntax is incorrect | Refer to [tag filtering syntax](https://0285ca83.previews.developers.cloudflare.com/resource-tagging/how-to/filter-resources/) |
| `1009` | 400 | `tag_key` is required | Missing `tag_key` parameter | Include the `tag_key` path parameter |
| `1010` | 400 | too many tag filters (maximum 20) | More than 20 `tag` query parameters | Reduce filters to 20 or fewer, or split across multiple requests |
| `1011` | 400 | tag key too long (maximum 256 characters) | Tag key exceeds 256 characters | Shorten the tag key |
| `1012` | 400 | tag value too long (maximum 1024 characters) | Tag value exceeds 1,024 characters | Shorten the tag value |
| `1013` | 400 | too many OR values in tag filter (maximum 10) | More than 10 comma-separated values in a single filter | Split into multiple filters |
| `1014` | 400 | Invalid tag key | Key contains invalid characters | Use only letters, digits, `_`, `.`, `-` |
| `1015` | 400 | Invalid delete payload | Delete request body is malformed | Verify the body includes `resource_type` and `resource_id` |

Error 1007 note

The error message text references `:` as the tag filter separator (for example, `key:value`), but the API implementation uses `=` in query parameters (for example, `tag=key=value`). The error message is outdated — always use `=` when constructing tag filters.

## Resource not found behavior

In the current beta, `GET /accounts/{account_id}/tags` returns `500 Internal Server Error` for resources that do not exist or have never been tagged:

```plaintext
"resource not found: type={resource_type} id={resource_id}"
```

List endpoints (`/tags/resources`, `/tags/keys`, `/tags/values/{key}`) return `200 OK` with an empty result array when no matches are found -- this is expected, not an error.

This `500` behavior is a known beta limitation and may change to `404` in a future release.

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