> For clean Markdown content of this page, append .md to this URL. For the complete documentation index, see https://learning.postman.com/llms.txt. For full content including API reference and SDK examples, see https://learning.postman.com/llms-full.txt.

# Postman developer resources

You can use a variety of Postman open-source SDKs, libraries, and tools in your projects. You can use and contribute to Postman's [open-source](https://www.postman.com/open-philosophy/) projects on [GitHub](https://github.com/postmanlabs).

Check out the pages in this section for an intro to developer resources that enable you to engage with the Postman community and integrate Postman into your workflow.

* [Echo API](/docs/reference/developer-resources/echo-api/) — Use the Echo API to learn and experiment with Postman.
* [Postman Collection Format schema documentation](https://schema.postman.com/) — The Collection Format is the specification that drives collections in Postman. It's portable and provides a unique interface for organizing API requests and modeling API workflows. It's machine and human-readable and can be used to generate client and server-side SDKs, documentation, and mock servers. Learn more at the Postman Collection Format schema documentation.
* [Postman Collection SDK](/docs/reference/developer-resources/collection-sdk/) — The Postman Collection SDK is a JavaScript module for working with [collections](/docs/sending-requests/create-requests/intro-to-collections/).
* [Runtime library](/docs/reference/developer-resources/runtime-library/) — The Runtime library powers Postman request sending functionality.
* [Code generators](/docs/reference/developer-resources/code-generators/) — Postman uses the code generators SDK to create client snippets from your requests.
* [Postman Collection converters](/docs/reference/developer-resources/collection-conversion/) — The converters empower you to transform OpenAPI, Swagger, RAML, GraphQL, and WSDL specs to Postman Collection format.