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The Nuntly API uses API keys to authenticate requests. Each request to the API must include a valid API key in the Authorization header.

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Authentication

curl -X POST 'https://api.nuntly.com/emails' \
     -H 'Authorization: Bearer <API_KEY>' \
    -H 'Content-Type: application/json' \
    ... # other headers and body
You can create an API key in the Nuntly dashboard here. Make sure to keep your API key secure and do not share it publicly.

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SDK

For easier integration, consider using our official client SDKs, which handle authentication and API requests for you. 
const client = new Nuntly({
  apiKey: process.env['NUNTLY_API_KEY'],
});
Refer to the SDK documentation for more details on how to use the client libraries.