Documentation
Welcome to the Letopis documentation. Letopis is an open-source, multi-tenant service that stores a complete, tamper-evident history of changes to entities in external systems.
Getting Started
Install Letopis, configure your first tenant, and run your first write.
Read guide →Concepts
Collections, entities, events, reliability modes, hash chains, multi-tenancy.
Learn concepts →Write API
Ingest state changes and diffs, idempotency, batch writes, reliability modes.
API reference →Read API
History, current state, point-in-time reconstruction, business flows, pagination.
API reference →Admin API
Collection config, rules, webhooks, dead-letter queue management.
API reference →Client SDKs
Official Laravel and Node.js SDKs — typed clients, framework integration.
Browse SDKs →OpenAPI Spec
Full OpenAPI 3.1 specification for all REST endpoints. Auto-validated in CI.
View on GitHub ↗