# Observer Node Observer nodes play an important role in validating blocks created by generator nodes. Once a block is created, observer nodes confirm the block and add signatures to the block. At least three observer node signatures are required for a block to be recognized as valid. This process is essential to maintaining the integrity and trustworthiness of the blockchain. --- # 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://meversedex.gitbook.io/meverse-dev-docs/meverse-network-structure/observer-node.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.