# Checker Overview ### Who are the Checkers? Checkers are individuals or organizations who participate in the Pictor Network on the validation side of the rendering pipeline. They form the human role behind [Checker Nodes](https://docs.pictor.network/docs/products/pictor-checker-node), representing the community that helps uphold trust and reliability across the ecosystem. Unlike Workers, they don’t provide GPU compute but instead contribute by supporting the network’s quality assurance process. ### What do the Checkers do? Checkers are responsible for verifying rendering outputs submitted by Workers through the Checker Nodes. The tasks of Checker Nodes include: * Checking outputs against job specifications (resolution, frame range, format, etc.) * Identifying errors or discrepancies, such as missing frames or visual artifacts * Approving valid results to release rewards to Workers, or flagging faulty outputs for reprocessing By performing these tasks using Checker Nodes, Checkers help ensure job accuracy and preserve the overall integrity and quality of the network. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.pictor.network/docs/participants/checkers/checker-overview.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.