docs: update API docs

docs/developer-guides/api.md

@@ -1,16 +1,4 @@
 # API
 
-nmrXiv infrastructure supports API through which software developers can interact with the data programmatically. Postman tool is used to document how nmrXiv API should be used, methods, status, and error codes supported.
+The infrastructure of nmrXiv facilitates API access, enabling software developers to interact with the data programmatically. The documentation for nmrXiv API, including information on methods, status, and supported error codes, is provided using [Swagger](https://swagger.io/). For detailed insights into API usage, please refer to our [Swagger documentation](https://nmrxiv.org/api/documentation).
 
-Postman allows you to publish documentation quickly and easily. Postman automatically pulls your sample requests, headers, code snippets, etc., to populate your documentation page with dynamic examples and machine-readable instructions so you can easily share your API with the rest of the world.
-
-## [nmrXiv APIs](https://www.postman.com/nmrxiv-jena/workspace/nmrxiv/request/17173369-2ef7d5a8-0121-418b-8762-cc47d7a5b7cd)
-
-<img src="/img/postman.png"/>
-
-<br/><br/>
-If you are interested in specific endpoints, check out the following quick links:
-
-- [Authentication and Authorisation](https://www.postman.com/nmrxiv-jena/workspace/nmrxiv/collection/17173369-f372ec15-9b92-4902-8844-b129ab0c17d1?ctx=documentation)
-- [Projects/Studies/Dataset](https://www.postman.com/nmrxiv-jena/workspace/nmrxiv/collection/17173369-b00475c3-6171-4e58-97ab-cb88b3ac4c59?ctx=documentation)
-- [Bioschemas](https://www.postman.com/nmrxiv-jena/workspace/nmrxiv/folder/17195598-561a4bcc-7c84-4669-b245-c8416dfc8e90?ctx=documentation)