# Authentication To connect to our test or production environment and the different networks, a private client key is required. By using a Client key that is linked to your application, an extra level of security is added, as it allows transaction filtering based on origin. \ \ On alignment of deliverables with our team, a production client key shall be provided to use the APIs in the production environment. --- # 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://metasky.gitbook.io/mews/metasky-api-collection/authentication.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.