ExtendsClass JSON Store — Free Simple Key-Value Storage API (No Key)

TL;DR

ExtendsClass JSON Store is a throw-away simple key-value storage API: send a POST with your JSON data, get back a unique URL, and retrieve it anytime with GET. No database setup, no authentication, no persistence guarantees — perfect for sharing config snippets, temporary test data, or quick prototyping where you just need JSON to survive a page refresh.

Quick start (store): POST https://extendsclass.com/api/json-storage/put

No API key needed — just make a request!

How to Use This API

1. Store JSON Data (POST)

Send JSON in the request body. The response includes a unique ID to retrieve it:

curl -X POST https://extendsclass.com/api/json-storage/put \
  -H "Content-Type: application/json" \
  -d '{"name": "test", "value": 42}'

2. Retrieve JSON Data (GET)

Use the ID from the POST response to get your data back:

https://extendsclass.com/api/json-storage/{id}

3. JavaScript — Store and Retrieve

// Store data
fetch('https://extendsclass.com/api/json-storage/put', {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({message: 'Hello, store!'})
})
.then(res => res.json())
.then(data => {
  console.log('Stored with ID:', data.id);
  // Retrieve it
  return fetch(`https://extendsclass.com/api/json-storage/${data.id}`);
})
.then(res => res.json())
.then(data => console.log('Retrieved:', data));

4. Python — Quick Config Storage

import requests

config = {'theme': 'dark', 'lang': 'en', 'notifications': True}
post = requests.post('https://extendsclass.com/api/json-storage/put', json=config)
store_id = post.json()['id']
print(f'Saved as: {store_id}')

# Later, anywhere
get = requests.get(f'https://extendsclass.com/api/json-storage/{store_id}')
print(get.json())

Frequently Asked Questions

How long does stored data persist?: Data is stored temporarily and may be deleted at any time. This is not a production database — think of it as a pastebin for JSON.
Do I need an API key?: No. The JSON Store is completely open. No signup, no authentication.
What's the maximum data size?: There's no published limit, but very large payloads (megabytes) may be rejected. Stick to typical API response sizes (under 1MB).
Can I delete stored data?: The API supports DELETE requests. Send DELETE https://extendsclass.com/api/json-storage/{id} to remove your stored data.
Is the data publicly accessible?: Yes. Anyone with the storage ID can retrieve your data. Do not store sensitive or private information.
What content types are supported?: The API accepts JSON (application/json) and returns JSON responses.

API Details

API URL: https://extendsclass.com/api/json-storage
Documentation: extendsclass.com/json-storage.html
Category: Development
Authentication: Not Required
Geographic Coverage: Global

What You Can Build

Quick configuration sharing between development environments
Test data persistence for prototyping without database setup
JSON snippet pastebin for debugging and team collaboration
Lightweight feature flag storage for small-scale experiments
Temporary webhook payload capture during API development