Chart Generator API Reference

Overview

For advanced users, Chart Generator supports all Chart.js dataset properties as passthrough options, giving you full control over fills, gradients, point styles, and more.

Endpoint

One host, one path per API. The block below shows this call in four languages; every one of them is the same HTTP request. Making requests covers the timeouts, retries and parameter rules that apply to all of them. The SDKs wrap the same call in a typed client.

POSThttps://api.apiverve.com/v1/chartgenerator

curl -X POST https://api.apiverve.com/v1/chartgenerator \
  -H "x-api-key: your_api_key_here" \
  -H "Content-Type: application/json" \
  -d '{
  "type": "bar",
  "labels": [
    "Q1",
    "Q2",
    "Q3",
    "Q4"
  ],
  "datasets": [
    {
      "name": "Sales",
      "values": [
        50,
        60,
        70,
        180
      ]
    },
    {
      "name": "Revenue",
      "values": [
        100,
        200,
        300,
        400
      ]
    }
  ],
  "title": "Quarterly Report"
}'

const res = await fetch('https://api.apiverve.com/v1/chartgenerator', {
  method: 'POST',
  headers: {
    'x-api-key': 'your_api_key_here',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
  "type": "bar",
  "labels": [
    "Q1",
    "Q2",
    "Q3",
    "Q4"
  ],
  "datasets": [
    {
      "name": "Sales",
      "values": [
        50,
        60,
        70,
        180
      ]
    },
    {
      "name": "Revenue",
      "values": [
        100,
        200,
        300,
        400
      ]
    }
  ],
  "title": "Quarterly Report"
}),
});

if (!res.ok) throw new Error(`${res.status} ${await res.text()}`);

const { data } = await res.json();
console.log(data);

import requests

res = requests.post(
    "https://api.apiverve.com/v1/chartgenerator",
    headers={"x-api-key": "your_api_key_here"},
    json={
    "type": "bar",
    "labels": [
        "Q1",
        "Q2",
        "Q3",
        "Q4"
    ],
    "datasets": [
        {
            "name": "Sales",
            "values": [
                50,
                60,
                70,
                180
            ]
        },
        {
            "name": "Revenue",
            "values": [
                100,
                200,
                300,
                400
            ]
        }
    ],
    "title": "Quarterly Report"
},
    timeout=15,
)
res.raise_for_status()

print(res.json()["data"])

package main

import (
	"fmt"
	"io"
	"net/http"
	"strings"
)

func main() {
	body := strings.NewReader(`{
  "type": "bar",
  "labels": [
    "Q1",
    "Q2",
    "Q3",
    "Q4"
  ],
  "datasets": [
    {
      "name": "Sales",
      "values": [
        50,
        60,
        70,
        180
      ]
    },
    {
      "name": "Revenue",
      "values": [
        100,
        200,
        300,
        400
      ]
    }
  ],
  "title": "Quarterly Report"
}`)
	req, _ := http.NewRequest("POST", "https://api.apiverve.com/v1/chartgenerator", body)
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("x-api-key", "your_api_key_here")

	res, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer res.Body.Close()

	out, _ := io.ReadAll(res.Body)
	fmt.Println(string(out))
}

Replace your_api_key_here with the key from your dashboard. When the inputs arrive as a list rather than one at a time, batch requests run up to 200 of them through this same API in a single call.

Authentication

Send your key in the x-api-key header. That is the only auth step — there is no token exchange and no per-endpoint scope to configure. Authentication covers creating, rotating and revoking keys.

401 is the only auth verdict

A 401 means the key is missing, invalid or expired. A 403 means the key is valid but not permitted here — blocked by a key restriction or an IP allow-list. Running out of credits is a 429.

Parameters

Sent as JSON in the request body. Premium parameters are accepted on every plan but only take effect on plans that include them.

Parameter	Type	Description
`type`Optional	string	Chart type `barlinepiedoughnutradarpolarArea` default bar
`labels`Required	array	Array of labels for the x-axis or chart segments
`datasets`Required	array	Array of datasets with 'name' and 'values'
`title`Optional	string	Optional title displayed on the chart
`width`OptionalPremium	integer	Image width in pixels default 500 · range 100–1024
`height`OptionalPremium	integer	Image height in pixels default 300 · range 100–1024
`format`OptionalPremium	string	Output format `pngjpegsvg` default png

Response

Every API returns the same three top-level keys, so one response handler covers your whole integration: status, error and data. Only data changes shape. Response format covers the envelope, the other output formats and how premium fields are withheld.

Sample response

{
  "status": "ok",
  "error": null,
  "data": {
    "id": "6a783c9c-f959-4a88-80cb-84580b8c788d",
    "format": ".png",
    "expires": 1766010059346,
    "type": "bar",
    "downloadURL": "https://storage.googleapis.com/apiverve/APIData/chartgenerator/6a783c9c-f959-4a88-80cb-84580b8c788d.png?GoogleAccessId=635500398038-compute%40developer.gserviceaccount.com&Expires=1766010059&Signature=Iud%2B7hoPRtPbWoJXQAAnhN9nqUHObHQ7PaiJCtkWQzEzpMexPMRR3BIPKkwOUMAwT6YcNbvywgnLvU2SV7498rbp%2FZbktuAR3Ok1E3O6p4ZJJ4s%2FpW8HAZgIBJpDlPUQt%2FjulQLtwP2I2GUPVmgWheXitnWsWq1S3E2k4viysXwS8H2%2B8BBdxjS%2Bv1ruGXbqd4RpdzdLst4e9YtHGWNZuiaL8zX8%2FHA1zreyrewY2fpB4g0pHnh%2B3IDE48eIohb4HQoDc9vXy4s8sIoqLScmTLyxyq1pPYlak1n1PWdbLcz4TBr41JnLELzF%2BBwCkyrLts9dhisSseaIB7d4g4JQnw%3D%3D"
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

Field	Type	Example	Description
`id`	string	`"6a783c9c-f959-4a88-80cb-84580b8c788d"`	Unique identifier for the generated chart
`format`	string	`".png"`	File format of the generated chart image
`expires`	number	`1766010059346`	Unix timestamp when the chart URL expires
`type`	string	`"bar"`	Type of chart that was generated
`downloadURL`	string	"https://storage.googleapis.com/apiverve/APIData/chartgenerator/6a783c9c-f959-4a88-80cb-84580b8c788d.png?GoogleAccessId=635500398038-compute%40developer.gserviceaccount.com&Expires=1766010059&Signature=Iud%2B7hoPRtPbWoJXQAAnhN9nqUHObHQ7PaiJCtkWQzEzpMexPMRR3BIPKkwOUMAwT6YcNbvywgnLvU2SV7498rbp%2FZbktuAR3Ok1E3O6p4ZJJ4s%2FpW8HAZgIBJpDlPUQt%2FjulQLtwP2I2GUPVmgWheXitnWsWq1S3E2k4viysXwS8H2%2B8BBdxjS%2Bv1ruGXbqd4RpdzdLst4e9YtHGWNZuiaL8zX8%2FHA1zreyrewY2fpB4g0pHnh%2B3IDE48eIohb4HQoDc9vXy4s8sIoqLScmTLyxyq1pPYlak1n1PWdbLcz4TBr41JnLELzF%2BBwCkyrLts9dhisSseaIB7d4g4JQnw%3D%3D"	Temporary URL to download the generated chart

Errors

Read the HTTP status first, then error for the specific reason. The body names the parameter that has to change. Error handling covers the full status list and which of them are worth retrying.

Status	Meaning	What to do
`400`	Input was rejected	Read `error`; it names the parameter.
`401`	Key missing or invalid	Check the header name and the key value.
`403`	Key valid, but not permitted	A key restriction or IP allow-list; see key scoping.
`429`	Rate limited, or out of credits	Read `error` to tell them apart; see rate limits.

Other ways to use Chart Generator

Set up Chart Generator on APIVerve, or reach the same source a different way. Your APIVerve account and credits work on all of them — one key, one balance.

Give it to an AI agentConnect over MCP and your agent calls it as a native tool — Claude, Cursor, ChatGPT.VerveKit →Reference →

Chart Generator