QuickChart
QuickChart — keyless JSON API
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QuickChart. Generate Chart.js image charts for email, dashboards, etc. Provides a replacement API for the old Google Image Charts service.
Uptime history
—%90 days
—%30 days
—P50 · ms
—P95 · ms
Live response samplecaptured by our last successful check
GET https://quickchart.io/openapi.json
{
"openapi": "3.1.0",
"info": {
"title": "QuickChart API",
"version": "1.0.0",
"description": "Generate Chart.js chart images, QR codes, barcodes, and machine-readable validation results.",
"contact": {
"name": "QuickChart Support",
"email": "support@quickchart.io",
"url": "https://quickchart.io/contact/"
}
},
"servers": [
{
"url": "https://quickchart.io"
}
],
"tags": [
{
"name": "Charts"
},
{
"name": "QR codes"
}
],
"paths": {
"/openapi.json": {
"get": {
"tags": [
"Discovery"
],
"operationId": "getOpenApiSpec",
"summary": "Fetch the QuickChart OpenAPI description.",
"responses": {
"200": {
"description": "OpenAPI JSON document.",
"content": {
"application/json": {
"schema": {
"type": "object"
}
}
}
}
}
}
},
"/chart": {
"get": {
"tags": [
"Charts"
],
"operationId": "getChart",
"summary": "Generate a chart image from query parameters.",
"parameters": [
{
"name": "chart",
"in": "query",
"schema": {
"type": "string"
},
"description": "Chart.js configuration object as JSON or Javascript."
},
{
"name": "c",
"in": "query",
"schema": {
"type": "string"
},
"description": "Alias for chart."
}
],
"responses": {
"200": {
"$ref": "#/components/responses/ImageResponse"
},
"400": {
"$ref": "#/components/responses/JsonError"
}
}
},
"post": {
"tags": [
"Charts"
],
"operationId": "postChart",
"summary": "Generate a chart image from a JSON request body.",
"requestBody": {
"required": true,
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/ChartRequest"
}
}
}
},
"responses": {
"200": {
"$ref": "#/components/responses/ImageResponse"
},
"400": {
"$ref": "#/components/responses/JsonError"
}
}
}
},
"/api/validate-chart": {
"post": {
"tags": [
"Validation"
],
"operationId": "validateChart",
"summary": "Validate a chart request and return JSON instead of an image.",
"description": "Runs the chart configuration through the renderer and discards the image bytes. Use this before retrying or saving generated chart configs.",
"requestBody": {
"required": true,
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/ChartRequest"
}
}
}
},
"responses": {
"200": {
"$ref": "#/components/responses/ValidationResponse"
},
"400": {
"$ref": "#/components/responses/ValidationResponse"
},
"403": {
"$ref": "#/components/responses/ValidationResponse"
}
}
}
},
"/qr": {
"get": {
"tags": [
"QR codes"
],
"operationId": "getQr",
"summary": "Generate a QR code from query parameters.",
"parameters": [
{
"name": "text",
"in": "query",
"required": true,
"schema": {
"type": "string"
}
},
{
"name": "format",
"in": "query",
"schema": {
"type": "string",
"enum": [
"png",
"svg"
]
}
}
],
"responses": {
"200": {
"$ref": "#/components/responses/ImageResponse"
},
"400": {
"$ref": "#/components/responses/JsonError"
}
}
},
"post": {
"tags": [
"QR codes"
],
"operationId": "postQr",
"summary": "Generate a QR code from a JSON request body.",
"requestBody": {
"required": true,
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/QrRequest"
}
}
}
},
"responses": {
"200": {
"$ref": "#/components/responses/ImageResponse"
},
"400": {
"$ref": "#/components/responses/JsonError"
},
"403": {
"$ref": "#/components/responses/JsonError"
}
}
}
},
"/api/validate-qr": {
"post": {
"tags": [
"Validation"
],
"operationId": "validateQr",
"summary": "Validate a QR code request and return JSON instead of an image.",
"requestBody": {
"required": true,
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/QrRequest"
}
}
}
},
"responses": {
"200": {
"$ref": "#/components/responses/ValidationResponse"
},
"400": {
"$ref": "#/components/responses/ValidationResponse"
},
"403": {
"$ref": "#/components/responses/ValidationResponse"
}
}
}
},
"/qr/batch": {
"post": {
"tags": [
"QR codes"
],
"operationId": "postQrBatch",
"summary": "Generate many QR codes and return a ZIP archive.",
"requestBody": {
"required": true,
"content": {
"application/json": {
"schema": {
"oneOf": [
{
"type": "array",
"minItems": 1,
"maxItems": 1000,
"items": {
"$ref": "#/components/schemas/QrRequest"
}
},
{
"type": "object",
"required": [
"qrCodes"
],
"properties": {
"qrCodes": {
"type": "array",
"minItems": 1,
"maxItems": 1000,
"items": {
"$ref": "#/components/schemas/QrRequest"
}
},
"zipFilename": {
"type": "string",
"default": "qr-codes.zip"
}
}
}
]
}
}
}
},
"responses": {
"200": {
"description": "ZIP archive containing one generated QR image per request item.",
"content": {
"application/zip": {
"schema": {
"type": "string",
"format": "binary"
}
}
}
},
"400": {
"$ref": "#/components/responses/JsonError"
},
"403": {
"$ref": "#/components/responses/JsonError"
}
}
}
},
"/barcode": {
"post": {
"tags": [
"Barcodes"
],
"operationId": "postBarcode",
"summary": "Generate a barcode from a JSON request body.",
"requestBody": {
"required": true,
"content": {
"application/json": {
"schema": {
"type": "object",
"required": [
"type",
"text"
],
"properties": {
"type": {
"type": "string",
"description": "Barcode type, such as code128 or ean13."
},
"text": {
"type": "string"
},
"data": {
"type": "string",
"description": "Alias for text."
},
"format": {
"type": "string",
"enum": [
"png",
"svg"
],
"default": "png"
},
"width": {
"type": "integer"
},
"height": {
"type": "integer"
},
"scale": {
"type": "integer",
"default": 1
},
"includeText": {
"type": "boolean"
}
}
}
}
}
},
"responses": {
"200": {
"$ref": "#/components/responses/ImageResponse"
},
"400": {
"$ref": "#/components/responses/JsonError"
}
}
}
},
"/natural/config": {
"post": {
"tags": [
"Charts"
],
"operationId": "postNaturalChartConfig",
"summary": "Generate an agent-friendly chart config from natural language.",
"description": "Returns the generated Chart.js config, a saved chart URL, and an editor URL instead of only returning image bytes.",
"requestBody": {
"required": true,
"content": {
"application/json": {
"schema": {
"type": "object",
"required": [
"description"
],
"properties": {
"description": {
"type": "string",
"maxLength": 512
},
"width": {
"type": "integer",
"default": 500
},
"height": {
"type": "integer",
"default": 300
},
"backgroundColor": {
"type": "string",
"default": "transparent"
}
}
}
}
}
},
"responses": {
"200": {
"description": "Generated chart configuration and URLs.",
"content": {
"application/json": {
"schema": {
"type": "object",
"properties": {
"success": {
"type": "boolean"
},
"description": {
"type": "string"
},
"chart": {
"type": "string"
},
"chartUrl": {
"type": "string"
},
"chartMakerUrl": {
"type": "string"
},
"warnings": {
"type": "array",
"items": {
"type": "string"
}
}
}
}
}
}
}
}
}
}
},
"components": {
"securitySchemes": {
"apiKeyQuery": {
"type": "apiKey",
"in": "query",
"name": "key"
},
"apiKeyBearer": {
"type": "http",
"scheme": "bearer"
}
},
"schemas": {
"ChartRequest": {
"type": "object",
"required": [
"chart"
],
"properties": {
"chart": {
"oneOf": [
{
"type": "object"
},
{
"type": "string"
}
],
"description": "Chart.js configuration object, or a Javascript object string."
},
"c": {
"oneOf": [
{
"type": "object"
},
{
"type": "string"
}
],
"description": "Alias for chart."
},
"width": {
"type": "integer",
"minimum": 1,
"maximum": 3000,
"default": 500
},
"w": {
"type": "integer",
"minimum": 1,
"maximum": 3000,
"description": "Alias for width."
},
"height": {
"type": "integer",
"minimum": 1,
"maximum": 3000,
"default": 300
},
"h": {
"type": "integer",
"minimum": 1,
"maximum": 3000,
"description": "Alias for height."
},
"devicePixelRatio": {
"type": "number",
"default": 2
},
"backgroundColor": {
"type": "string",
"default": "transparent"
}
}
},
"QrRequest": {
"type": "object",
"required": [
"text"
],
"properties": {
"text": {
"type": "string",
"description": "Text, URL, or payload to encode in the QR code."
},
"format": {
"type": "string",
"enum": [
"png",
"svg"
],
"default": "png"
},
"size": {
"type": "integer",
"minimum": 1,
"maximum": 3000,
"default": 150
},
"margin": {
"type": "integer",
"default": 4
},
"ecLevel": {
"type": "string",
"enum": [
"L",
"M"
]
},
"dark": {
"type": "string",
"default": "000000"
},
"light": {
"type": "string",
"default": "ffffff"
},
"finderColor": {
"type": "string"
}
}
}
},
"responses": {
"ImageResponse": {
"description": "Generated image response.",
"content": {
"image/png": {
"schema": {
"type": "string",
"format": "binary"
}
},
"image/jpeg": {
"schema": {
"type": "string",
"format": "binary"
}
},
"image/svg+xml": {
"schema": {
"type": "string",
"format": "binary"
}
},
"image/webp": {
"schema": {
"type": "string",
"format": "binary"
}
},
"application/pdf": {
"schema": {
"type": "string",
"format": "binary"
}
},
"text/plain": {
"schema": {
"type": "string",
"description": "Base64-encoded image when format=base64."
}
}
}
},
"ValidationResponse": {
"description": "Structured validation result.",
"content": {
"application/json": {
"schema": {
"type": "object",
"required": [
"success",
"errors"
],
"properties": {
"success": {
"type": "boolean"
},
"errors": {
"type": "array",
"items": {
"type": "string"
}
},
"warnings": {
"type": "array",
"items": {
"type": "string"
}
},
"normalized": {
"type": "object"
},
"renderCheck": {
"type": "object",
"properties": {
"contentType": {
"type": "string"
},
"bytes": {
"type": "integer"
}
}
}
}
}
}
}
},
"JsonError": {
"description": "Structured error response.",
"content": {
"application/json": {
"schema": {
"type": "object",
"required": [
"success",
"error"
],
"properties": {
"success": {
"type": "boolean",
"enum": [
false
]
},
"error": {
"type": "string"
},
"errors": {
"type": "array",
"items": {
"type": "string"
}
}
}
}
}
}
}
}
}
}Call itcurl · fetch · python
curl "https://quickchart.io/openapi.json"const res = await fetch("https://quickchart.io/openapi.json");
const data = await res.json();
console.log(data);import requests
res = requests.get("https://quickchart.io/openapi.json")
print(res.json())BROWSER CALLS BLOCKED (NO CORS/HTTPS) — USE THE CURL SNIPPET
First rollup pending — GET /openapi.json has been probed
GET
/openapi.jsonPROBEDQuickChart — keyless JSON API
GET
/openapi.json?limit=5Paginated variant with limit parameter.
GET
/chartGenerate a chart image from query parameters.
GET
/qrGenerate a QR code from query parameters.
Machine-readable spec
We probe a documented GET and expect 2xx JSON — full uptime and health score. Export includes every documented route below.
Response-shape history
Stable. No schema drift observed since monitoring began — the response shape has not changed under our checks.
QuickChart: common questions
Is QuickChart free to use?
Yes — QuickChart is a free developer tools API. Free tier: Free — limits not published. Whether the free tier allows commercial use is unclear — check the provider docs.
Does QuickChart need an API key?
No — QuickChart needs no API key or signup. You can call it straight away; rate limits still apply (Unpublished).
Can I call QuickChart from the browser?
Not directly — QuickChart doesn't send browser-friendly CORS headers, so call it from a server or proxy instead. Copy the curl or Python snippet on this page to get started.
Is QuickChart up right now?
As of our last scheduled check, QuickChart is unmonitored. We re-probe it every sweep — the status badge and uptime chart above always show the latest.