extendsclass.com
ExtendsClass is a browser-based toolbox for developers with utilities for testing, formatting, conversion, and lightweight API tooling. It also offers a hosted JSON storage service and a public fake-data API.
ExtendsClass exposes two public HTTP integration surfaces: the JSON Storage API (with OpenAPI, using an account API key and optionally per-bin security keys) and a public no-auth Fake API for test data.
- JSON Storage APIdiscovered
- Fake APIdiscovered
Create a free account from My Account, then open the JSON Storage page's API documentation at JSON storage. It states that you must create an account to use the API and can find your API key on the My Account page. Use that key in the Api-key request header for API operations that require it.
On JSON storage, set a per-bin Security-key when creating or editing a bin. This optional secret protects a bin against access, modification, and deletion; it is required to read private bins and to update or delete bins protected by a security key.
conventions · 0/8 published
- integrations.json✗
/.well-known/integrations.json - llms.txt✗
/llms.txt - API catalog✗
/.well-known/api-catalog - OpenAPI document✗
/api/schema/, /openapi.json, /swagger.json, /api/openapi.json, or /v1/openapi.json - MCP server card✗
/.well-known/mcp/server-card.json - OAuth protected resource✗
/.well-known/oauth-protected-resource - Agent card✗
/.well-known/agent-card.json - Agent skills✗
/.well-known/agent-skills/index.json
Publish these signals → /publishing