Karan Kaw's Blog: Salesforce Documentation

Tooling API Query SObject

REST API Developer Guide
Build versatile and lightweight solutions that integrate your Salesforce data using REST API. This simple RESTful interface is powerful, convenient, and great for writing mobile and web apps.
Documentation|Force.com|Integration
https://developer.salesforce.com/docs/atlas.en-us.api_rest.meta/api_rest/intro_what_is_rest_api.htm

Object Reference for Salesforce and Lightning Platform
Get details on standard objects so that you can interface with your Salesforce data.
Documentation|Force.com|Database, Objects, Query, and Search
https://developer.salesforce.com/docs/atlas.en-us.object_reference.meta/object_reference/sforce_api_objects_concepts.htm

Salesforce Field Reference Guide
Use this concise reference to quickly look up details of the standard fields for most of the major objects in Salesforce.com.
Documentation|Force.com|Database, Objects, Query, and Search
https://developer.salesforce.com/docs/atlas.en-us.sfFieldRef.meta/sfFieldRef/salesforce_field_reference.htm

SOQL and SOSL Reference
Query and search your org’s data for specific information with Salesforce Object Query Language and Salesforce Object Search Language.
Documentation|Force.com|Database, Objects, Query, and Search
https://developer.salesforce.com/docs/atlas.en-us.soql_sosl.meta/soql_sosl/sforce_api_calls_soql_sosl_intro.htm

Tooling API
Integrate Salesforce with your other systems using Tooling API. Metadata types are exposed as sObjects, so you can access one component of a complex type. This field-level access speeds up operations on complex metadata types. You can also build custom development tools for Salesforce applications. REST and SOAP are both supported
Documentation|Force.com|Integration
https://developer.salesforce.com/docs/atlas.en-us.api_tooling.meta/api_tooling/intro_api_tooling.htm

https://developer.salesforce.com/docs/atlas.en-us.api_tooling.meta/api_tooling/intro_tasks.htm

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https://developer.salesforce.com/docs/atlas.en-us.api_rest.meta/api_rest/dome_sobject_describe.htm

https://developer.salesforce.com/docs/atlas.en-us.api_rest.meta/api_rest/using_resources_working_with_searches_and_queries.htm

Salesforce Object Query Language (SOQL)

Salesforce Object Search Language (SOSL)

https://developer.salesforce.com/docs/atlas.en-us.api_rest.meta/api_rest/dome_search.htm

https://developer.salesforce.com/docs/atlas.en-us.api_rest.meta/api_rest/resources_search.htm

/vXX.X/search/?q=SOSL search string

A SOSL statement that is properly URL-encoded

SEARCH API - Search Resources

Use the "Search" resource to execute a SOSL search