| #https://www.notion.so/n8n/Frontmatter-432c2b8dff1f43d4b1c8d20075510fe4 | |
| contentType: reference | |
| # Node codex files | |
| The codex file contains metadata about your node. This file is the JSON file at the root of your node. For example, the [`HttpBin.node.json`](https://github.com/n8n-io/n8n-nodes-starter/blob/master/nodes/HttpBin/HttpBin.node.json){:target=_blank .external-class} file in the n8n starter. | |
| The codex filename must match the node base filename. For example, given a node base file named `MyNode.node.ts`, the codex would be named `MyNode.node.json`. | |
| | Parameter | Description | | |
| | -------- | ----------- | | |
| | `node` | Includes the node name. Must start with `n8n-nodes-base.`. For example, `n8n-nodes-base.openweatherapi`. | | |
| | `nodeVersion` | The node version. This should have the same value as the `version` parameter in your main node file. For example, `"1.0"`. | | |
| | `codexVersion` | The codex file version. The current version is `"1.0"`. | | |
| | `categories` | The settings in the `categories` array determine which category n8n adds your node to in the GUI. See [Node categories](#node-categories) for more information. | | |
| | `resources` | The `resources` object contains links to your node documentation. n8n automatically adds help links to credentials and nodes in the GUI. | | |
| ## Node categories | |
| You can define one or more categories in your node configuration JSON. This helps n8n put the node in the correct category in the nodes panel. | |
| Choose from these categories: | |
| * Data & Storage | |
| * Finance & Accounting | |
| * Marketing & Content | |
| * Productivity | |
| * Miscellaneous | |
| * Sales | |
| * Development | |
| * Analytics | |
| * Communication | |
| * Utility | |
| You must match the syntax. For example, `Data & Storage` not `data and storage`. | |