# RelayHost > Open-source, agent-friendly hosting for safe files and static websites. Anonymous uploads expire after 24 hours; accounts add persistent storage, stable subdomains and custom domains. - [Agent skill](https://host.anri.ai/skill.md): complete instructions for publishing via the API - [OpenAPI spec](https://host.anri.ai/openapi.json): machine-readable API description - [Agent docs](https://host.anri.ai/docs/agents): human-readable agent integration guide - [API base](https://host.anri.ai/api/v1): versioned JSON API