> For the complete documentation index, see [llms.txt](https://developers.felt.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developers.felt.com/rest-api/api-reference/layers/layer-library.md).
# Layer Library
APIs to publish layers
With these APIs, you can publish layers to a Felt Server.
## Publish map layer
> Publish a layer to a Felt Server so members of your workspace can reuse it.
```json
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```
## Publish map layer group
> Publish a layer group to a Felt Server so members of your workspace can reuse it.
```json
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```
## List Felt Server and Global Library layers
> List all layers published to your workspace's Felt Servers, or the Global Library.\
> \
> You can add one of these layers to a map by using the "Duplicate layers" API endpoint (\`POST /api/v2/duplicate\_layers\`) and the layer \`id\` provided by this endpoint.
```json
{"openapi":"3.0.0","info":{"title":"Felt","version":"2.0"},"tags":[{"description":"With these APIs, you can publish layers to a Felt Server.\n","name":"Layer Library"}],"servers":[{"url":"https://felt.com","variables":{}}],"security":[{"bearerAuth":[]}],"components":{"securitySchemes":{"bearerAuth":{"bearerFormat":"YOUR_API_KEY","scheme":"bearer","type":"http"}},"schemas":{"LayerLibrary":{"properties":{"layer_groups":{"items":{"$ref":"#/components/schemas/LayerGroup"},"type":"array"},"layers":{"items":{"$ref":"#/components/schemas/Layer"},"type":"array"},"type":{"enum":["layer_library"],"type":"string"}},"required":["type","layers","layer_groups"],"title":"LayerLibrary","type":"object"},"LayerGroup":{"additionalProperties":false,"properties":{"caption":{"nullable":true,"type":"string"},"id":{"$ref":"#/components/schemas/FeltID"},"layers":{"items":{"$ref":"#/components/schemas/Layer"},"type":"array"},"legend_visibility":{"description":"Controls how the layer group is displayed in the legend. 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```
---
# Agent Instructions
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## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation by asking a question.
Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:
```
GET https://developers.felt.com/rest-api/api-reference/layers/layer-library.md?ask=&goal=
```
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`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.
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