> ## Documentation Index > Fetch the complete documentation index at: https://developer.worldly.io/llms.txt > Use this file to discover all available pages before exploring further. # Material Library > Create and manage custom materials with Tier 2/3 supply chain data. The Material Library endpoints let you create and manage custom materials that can be used across your PIC products. Custom materials allow you to model Tier 2 and Tier 3 supply chain processes by specifying base materials, life cycle processes, and facility-level data. ## Available endpoints | Endpoint | Description | | :--------------------------------------------------------------------------- | :-------------------------------------------------------------------- | | [Create Material](/api-reference/pic/material-library/create) | Create a custom material with base materials and life cycle processes | | [Update Material](/api-reference/pic/material-library/update) | Modify an existing custom material | | [Delete Materials](/api-reference/pic/material-library/delete) | Remove custom materials from your library | | [Get Materials](/api-reference/pic/material-library/get-materials) | List materials in your material library | | [Get Base Materials](/api-reference/pic/material-library/get-base-materials) | Browse the base material catalog | | [Get Facilities](/api-reference/pic/material-library/get-facilities) | Search facilities for life cycle process linking | | [Get Countries](/api-reference/pic/material-library/get-countries) | Retrieve the list of available countries | ## Recipes