# QuickChart

> QuickChart generates chart images, QR codes, and barcodes from HTTP API requests. Use POST requests for generated or large chart configs, call validation endpoints before retrying, and prefer machine-readable API docs when building integrations.

## Machine-readable API

- OpenAPI JSON: https://quickchart.io/openapi.json
- Full agent notes: https://quickchart.io/llms-full.txt
- Human docs: https://quickchart.io/documentation/

## Core endpoints

- POST https://quickchart.io/chart - render a Chart.js config as an image.
- POST https://quickchart.io/api/validate-chart - validate a chart config and receive JSON errors/warnings instead of image bytes.
- POST https://quickchart.io/qr - render a QR code.
- POST https://quickchart.io/api/validate-qr - validate a QR config and receive JSON errors/warnings.
- POST https://quickchart.io/qr/batch - render up to 1000 QR codes and receive a ZIP archive.
- POST https://quickchart.io/natural/config - generate an editable Chart.js config and saved chart URL from a natural-language chart description.