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Open Source Chart Image API | QuickChart

quickchart.io

Create a chart image with one API call and embed it anywhere. Send charts in email and other platforms. Open source, no watermarks, used by thousands of developers.

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+25 llms.txt +20 ai-plugin missing +15 structured API
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Agentic Ready 65/100 

            

        

        

        
        

            
llms.txt Content

            
# 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.



        

        

        
        

            
OpenAPI Spec (preview)

            
openapi: 3.0.0
info:
  title: QuickChart API
  version: 1.0.0
  description: An API to generate charts and QR codes using QuickChart services.
servers:
  - url: https://quickchart.io
paths:
  /chart:
    get:
      operationId: getChart
      summary: Generate a chart (GET)
      description: Generate a chart based on the provided parameters.
      parameters:
        - in: query
          name: chart
          schema:
            type: string
          description: The chart configuration in Ch