A tool that automatically generates a web API specification from a web API documentation is provided. The tool extracts a base uniform resource locator (URL) string from the received documentation by identifying URL strings in the documentation that are valid web application programming interface (API) calls. The tool infers path templates by identifying and clustering path expressions in the documentation that invoke the same URL endpoints. The tool extracts hypertext transfer protocol (HTTP) request type and query parameters associated with the inferred path templates. The tool generates a specification that includes the extracted base URL, the inferred path templates, the extracted HTTP request types, and the extracted query parameters.