Documentation
JsonFabrica is an API-first synthetic JSON data engine — everything you can do is a REST call. Start with Getting Started for the full signup-to-first-generate flow, then dig into the Function Reference and API Reference as you build.
Getting Started
Sign up, get an API key, learn template syntax, create your first template, and generate your first document — the full first-use walkthrough.
Read the guide →Function Reference
All 25 built-in data-generation functions — signatures, parameters, examples, and cost tiers.
Browse functions →Control Flow
for/end_for loops and if/elseIf/else/endIf conditionals — syntax, operator precedence, nesting, and worked examples.
Read the reference →API Reference
Every REST endpoint grouped by area (Templates, Sequences, Batches, and more), with auth, request/response schemas, and worked examples.
Browse the API →Examples
Worked, copy-pasteable examples: single documents, reusable templates with seeds, sequence-backed ids, batches with relations, and more.
See examples →Usage & Billing
Usage is metered per generated document, in credits — most functions are cheap ("lightweight") calls, while a few sequence/context-backed functions cost more ("stateful"). See the Function Reference for the per-function cost tier, and Pricing for plan tiers, included credits, and overage rates. Check your own usage totals any time with GET /v1/usage.