Development — entry 024 of 100
ExtendsClass JSON Storage
Part of the free ExtendsClass developer-tools suite, this HTTP API lets you create a JSON bin with a single POST (no signup) and get back a URL you can GET, PUT, PATCH (JSON Merge Patch and JSON Patch are both supported), or DELETE; an auto-generated API key can optionally be required via a `Security-key` header to make a bin private. It's entirely free, capped at 10,000 requests per key and 100KB per bin, and served with wildcard CORS so it works directly from browser JavaScript.
AuthenticationNone requiredCall it straight away — no key, no signup.
HTTPSSupportedTraffic is encrypted in transit.
CORSEnabledCallable directly from browser JavaScript.
PricingFreeNo paid tier — free for the documented use case.
FormatsJSONResponses can be requested as JSON.
GreatAPIs Score
Score74
Authentication25/25No authentication required
Pricing20/20Free to use
Docs0/20No docs or spec available
Formats9/15Single response format
Freshness20/20Verified within 6 months
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<a href="https://greatapis.com/api/extendsclass-json-storage/"><img src="https://greatapis.com/badge/extendsclass-json-storage.svg" alt="Scored 74 on greatapis.com"></a>Auth quickstart
- No key needed — call it now.
Stored keyNo key stored
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.