This document contains the artifacts for the publication No Harness, No Problem: Oracle-guided Harnessing for Auto-generating C API Fuzzing Harnesses. The research artifact provides the necessary resources to reproduce the findings presented in the publication. It consists of two main components, along with supporting documentation and scripts for automatic harness generation and fuzzing. The first component includes the implementation of automatic harness generation for C APIs. The second component contains resources required to initiate harness generation, including seeds and makefiles for each API. We are applying for the available, functional, and reusable badges. Reviewers should be familiar with building and linking C libraries, as OGHarn focuses primarily on automatic harness generation for C APIs. Familiarity with Python is also recommended, as the core implementation is written in Python. This artifact has been tested on Ubuntu 22.04.