API specification document: This document outlines the requirements, endpoints, input parameters, output formats, and other specifications of the RESTful API. It serves as a reference for developers and stakeholders involved in the project and ensures that everyone is on the same page when it comes to the API's functionality.

Codebase: The codebase contains the implementation of the API using a programming language, such as Python, Java, or Node.js. It should be structured according to best practices and standards to ensure maintainability, scalability, and extensibility.

Authentication and Authorization Mechanism: Authentication and authorization mechanisms are essential components of any RESTful API. They ensure that only authorized users or applications can access the API's resources. This mechanism should be secure and flexible enough to accommodate different types of authentication methods such as JWT, OAuth, Basic Authentication, etc.

Test suite: A comprehensive test suite is necessary to ensure that the API is functioning as intended. The test suite should cover various scenarios, edge cases, and negative testing. This includes unit tests, integration tests, and end-to-end tests. Automated testing tools such as Postman or Selenium can be used for this purpose.

Deployment strategy: The deployment strategy should outline the steps required to deploy the API to production. This includes considerations such as server infrastructure, scaling requirements, load balancing, and monitoring. The deployment strategy should be flexible enough to accommodate different environments, such as development, testing, and production.