# CommuniQueue > Templated email and signed webhook notifications over one API. An app POSTs a template id plus string variables; the live version of that template renders and delivers. Changing the wording is a publish in CommuniQueue, not a deploy of the app. Base URL: https://api.communiqueue.com. Header: X-Api-Key on every request. Ids are GUIDs. ## Agent skill - [SKILL.md](https://communiqueue.com/skills/integrating-communiqueue/SKILL.md): setup order, the send call, error codes, template syntax, common mistakes - [reference.md](https://communiqueue.com/skills/integrating-communiqueue/reference.md): request and response shapes, every error code, rate limits, webhook signature check - [examples.md](https://communiqueue.com/skills/integrating-communiqueue/examples.md): send wrappers in Node and C# - [Install instructions](https://communiqueue.com/docs/ai-agents/) ## Docs - [Overview](https://communiqueue.com/docs/) - [Quickstart](https://communiqueue.com/docs/quickstart/) - [Authentication](https://communiqueue.com/docs/authentication/) - [Domain authentication](https://communiqueue.com/docs/domain-authentication/) - [API reference](https://communiqueue.com/docs/api/) - [Errors and rate limits](https://communiqueue.com/docs/errors/) - [Webhooks](https://communiqueue.com/docs/webhooks/) ## Machine-readable - [OpenAPI document](https://api.communiqueue.com/openapi/v1.json)