yRest

yRest

Zero-config REST API mock server from a single YAML file. Think json-server, but YAML-powered — with relations, SSE streams, handler functions and OpenAPI export.

Quick Start GitHub

Zero config

Point it at a db.yml file and get a full REST API instantly — no code, no config files required.

Full CRUD

GET, POST, PUT, PATCH and DELETE for every collection. Auto-incremental IDs. Atomic writes.

Query power

Field filters, operators (_gte, _like, _regex), full-text search, sorting, pagination and field projection.

Relations

many2one, one2one and many2many via a compact DSL. Auto-embedding, nested routes and bidirectional many2many.

Custom routes

Static responses, template variables, conditional scenarios, handler functions and SSE streams — all from YAML.

Test-ready

Programmatic API for Vitest and Playwright. Snapshot endpoints for clean test resets. OpenAPI 3.0 export.