# EZPsych

> EZPsych lets researchers pilot-test questionnaires with LLM-simulated respondents: upload a questionnaire, virtual personas answer it, and you get back a psychometric report (scores, reliability, item analysis) — no human participants required.

## Docs

- [Agent documentation hub](http://ezpsy.ai/docs/agent): start here — links every doc below plus a quick-start walkthrough for building and submitting an experiment via the API.
- [Workbook / experiment creation guide](http://ezpsy.ai/docs/agent/workbook_creation_prompt.md): how to define a questionnaire, scoring rules, personas, and run settings.
- [Experiment JSON spec](http://ezpsy.ai/docs/agent/experiment_json_spec.md): the JSON schema accepted by POST /api/v1/experiments/validate and POST /api/v1/experiments.
- [API reference](http://ezpsy.ai/docs/agent/api_reference.md): full REST API — auth, endpoints, request/response examples, error semantics, rate limits.
- [Market research guide](http://ezpsy.ai/docs/agent/market_research_guide.md): using EZPsych for concept tests, ad/copy comparisons, Van Westendorp pricing research, and questionnaire QA before fieldwork.
- [Pricing](http://ezpsy.ai/pricing): prepaid credit system, cost estimation, and billing.
- [Terms of Service](http://ezpsy.ai/terms): usage terms, data retention, and refund policy.