JSON Schema Generator API

Overview

To use JSON Schema Generator, you need an API key. You can get one by creating a free account and visiting your dashboard.

POST Endpoint

https://api.apiverve.com/v1/jsonschemagenerator

Example

How to call the JSON Schema Generator API in different programming languages.

curl -X POST \
  "https://api.apiverve.com/v1/jsonschemagenerator" \
  -H "X-API-Key: your_api_key_here" \
  -H "Content-Type: application/json" \
  -d '{
  "json": {
    "name": "John Doe",
    "age": 30,
    "email": "[email protected]",
    "active": true
  },
  "title": "User Schema"
}'

const response = await fetch('https://api.apiverve.com/v1/jsonschemagenerator', {
  method: 'POST',
  headers: {
    'X-API-Key': 'your_api_key_here',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    "json": {
        "name": "John Doe",
        "age": 30,
        "email": "[email protected]",
        "active": true
    },
    "title": "User Schema"
})
});

const data = await response.json();
console.log(data);

import requests

headers = {
    'X-API-Key': 'your_api_key_here',
    'Content-Type': 'application/json'
}

payload = {
    "json": {
        "name": "John Doe",
        "age": 30,
        "email": "[email protected]",
        "active": true
    },
    "title": "User Schema"
}

response = requests.post('https://api.apiverve.com/v1/jsonschemagenerator', headers=headers, json=payload)

data = response.json()
print(data)

package main

import (
    "fmt"
    "io"
    "net/http"
    "bytes"
    "encoding/json"
)

func main() {
    payload := map[string]interface{}{
        "json": "[object Object]",
        "title": "User Schema"
    }

    jsonPayload, _ := json.Marshal(payload)
    req, _ := http.NewRequest("POST", "https://api.apiverve.com/v1/jsonschemagenerator", bytes.NewBuffer(jsonPayload))

    req.Header.Set("X-API-Key", "your_api_key_here")
    req.Header.Set("Content-Type", "application/json")

    client := &http.Client{}
    resp, err := client.Do(req)
    if err != nil {
        panic(err)
    }
    defer resp.Body.Close()

    body, _ := io.ReadAll(resp.Body)
    fmt.Println(string(body))
}

{
  "status": "ok",
  "error": null,
  "data": {
    "$schema": "http://json-schema.org/draft-07/schema#",
    "title": "User Schema",
    "type": "object",
    "properties": {
      "name": {
        "type": "string"
      },
      "age": {
        "type": "integer"
      },
      "email": {
        "type": "string",
        "format": "email"
      },
      "active": {
        "type": "boolean"
      }
    },
    "required": [
      "name",
      "age",
      "email",
      "active"
    ]
  }
}

Authentication

The JSON Schema Generator API requires authentication via API key. Include your API key in the request header:

X-API-Key: your_api_key_here

Learn more about authentication →

Interactive API Playground

Test the JSON Schema Generator API directly in your browser with live requests and responses.

Parameters

The following parameters are available for the JSON Schema Generator API:

Response

The JSON Schema Generator API returns responses in JSON, XML, YAML, and CSV formats. The JSON response is shown in the Example section above; alternative formats below.

Other Response Formats

<?xml version="1.0" encoding="UTF-8"?>
<response>
  <status>ok</status>
  <error xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
  <data>
    <_schema>http://json-schema.org/draft-07/schema#</_schema>
    <title>User Schema</title>
    <type>object</type>
    <properties>
      <name>
        <type>string</type>
      </name>
      <age>
        <type>integer</type>
      </age>
      <email>
        <type>string</type>
        <format>email</format>
      </email>
      <active>
        <type>boolean</type>
      </active>
    </properties>
    <required>
      <item>name</item>
      <item>age</item>
      <item>email</item>
      <item>active</item>
    </required>
  </data>
</response>

status: ok
error: null
data:
  $schema: http://json-schema.org/draft-07/schema#
  title: User Schema
  type: object
  properties:
    name:
      type: string
    age:
      type: integer
    email:
      type: string
      format: email
    active:
      type: boolean
  required:
    - name
    - age
    - email
    - active

Response Structure

All API responses follow a consistent structure with the following fields:

Learn more about response formats →

Response Data Fields

When the request is successful, the data object contains the following fields:

Headers

Only X-API-Key is required. Optional headers include Accept for response format negotiation (JSON, XML, or YAML), User-Agent, and X-Request-ID for request tracing. See all request headers →

GraphQL AccessALPHA

Access JSON Schema Generator through GraphQL to combine it with other API calls in a single request. Query only the json schema generator data you need with precise field selection, and orchestrate complex data fetching workflows.

Credit Cost: Each API called in your GraphQL query consumes its standard credit cost.

POST https://api.apiverve.com/v1/graphql

query {
  jsonschemagenerator(
    input: {
      json: {"name":"John Doe","age":30,"email":"[email protected]","active":true}
      title: "User Schema"
    }
  ) {
    $schema
    title
    type
    properties {
      name {
        type
      }
      age {
        type
      }
      email {
        type
        format
      }
      active {
        type
      }
    }
    required
  }
}

Note: Authentication is handled via the x-api-key header in your GraphQL request, not as a query parameter.

CORS Support

The JSON Schema Generator API accepts cross-origin requests from any origin, so it can be called directly from browser-based applications without a proxy. See CORS support →

Rate Limiting

JSON Schema Generator requests are throttled per minute on the Free plan and unthrottled on paid plans. Exceeding the limit returns 429 Too Many Requests; rate-limit usage is reported in the X-RateLimit-Limit, X-RateLimit-Remaining, and X-RateLimit-Reset response headers. See per-plan limits and best practices →

Error Codes

The JSON Schema Generator API uses standard HTTP status codes — 200 on success, 400 for invalid parameters, 401 for missing or invalid keys, 403 for insufficient credits, 429 for rate-limit exhaustion, and 500/503 for server-side issues. Each error response includes an X-Request-ID header you can quote when contacting support. See full error handling guide →

SDKs for JSON Schema Generator

Official JSON Schema Generator packages on npm, PyPI, NuGet, and JitPack — plus a Postman collection and an OpenAPI spec. See the SDK guide →

JitPack

No-Code Integrations

JSON Schema Generator works with Zapier, Make, Pipedream, n8n, and Power Automate using the same API key. See setup guides →

Zapier

Make

Pipedream

n8n

Power Automate

Frequently Asked Questions

People who used this also used...

Based on your interest in JSON Schema Generator, you might also like these APIs:

UUID Generator

UUID Generator is a tool for generating Universally Unique Identifiers (UUIDs). It creates RFC 4122 version 4 UUIDs with multiple formatting options for different platform requirements.

1 credit per call

Username Generator

Username Generator is a simple tool for generating usernames. It returns a list of usernames based on the specified criteria.

1 credit per call

User Agent Generator

User Agent Generator is a simple tool for generating user agent strings. It returns a random user agent string.

1 credit per call