# SchedStack > Durable scheduled HTTP delivery — a destination plus a time, delivered and retried until it lands, never silently lost. Durable scheduling for the agentic era. SchedStack is durable scheduled HTTP delivery: hand it a destination and a time (one-shot or recurring) and it delivers, retries until it lands, and never silently loses an accepted delivery. It is agent-native (a first-class MCP server), spec-first, DST-correct on recurrence, and publishes a 100-300 ms p99 dispatch-initiation SLO. ## Documentation Sets - [Abridged documentation](https://schedstack.com/llms-small.txt): a compact version of the documentation for SchedStack, with non-essential content removed - [Complete documentation](https://schedstack.com/llms-full.txt): the full documentation for SchedStack ## Notes - The complete documentation includes all content from the official documentation - The content is automatically generated from the same source as the official documentation ## Optional - [OpenAPI specification (machine-readable)](https://schedstack.com/openapi.yaml): The full REST API contract — the source of truth the reference is generated from. - [Interactive API reference](https://schedstack.com/docs/api/): Scalar-rendered reference with a live try-it playground.