To create a URL to receive a webhook and run a POST request to an API with the same data, you need to choose a programming language or framework that can handle HTTP requests and webhook requests, set up a route to handle incoming requests, parse the data from the webhook request, construct a POST request to the API, and send the request using an HTTP client library. Calculating the cost of software development requires information such as the project scope, requirements, development time, programming language or framework, and whether you will be working with a software company or freelancer. The cost can vary depending on factors such as the developer's experience, project complexity, and duration, and we need more details to determine the total cost.