“API development”

Shows the TypeScript compiler's syntax tree and type info for code you paste.

Sends API calls from a web page: pick a method, add headers and a body, read the response.

Postgres running in the browser through PGlite, paired with an AI assistant for schemas, CSV imports and diagrams.

Describe an app idea and an open model generates a runnable code project with a preview.

Hosted test API with users and auth responses for front-end demos and request practice.

Creates a mock API endpoint and records the requests sent to it.

Public fake REST API serving placeholder products, users, carts and posts for prototypes and tests.

Talks to serial devices such as Arduinos from the browser using the Web Serial API.

A coding and development harness on local models or hosted APIs, for code, review, research and ops.

Sample apps and an expression playground for the WebNN API, which runs neural networks on device hardware from the browser.

GraphiQL interface wired to the Star Wars API for practising GraphQL queries.

Stores JSON documents behind a simple HTTP API for prototypes.

19 pay-per-call data tools for AI agents: crypto/DeFi, web, PDF, FX, weather, DNS.

Sends HTTP requests to a JSON API and shows the response.

MCP server for Frappe/ERPNext development with AI assistance for DocTypes, bench commands, and APIs

Pare Docker ג€” Structured Docker operations (ps, images, logs, build, compose) as typed JSON.

Runs automated checks on REST and SOAP web service responses.

Pare Lint ג€” Structured linting and formatting (ESLint, Prettier, Biome, Oxlint) as typed JSON.

Infers a JSON Schema describing the field types of a JSON sample.

Spins up a mock REST, SOAP or GraphQL endpoint with rules and generated responses, and logs incoming requests.

Pare Git ג€” Structured git operations (status, log, diff, branch, commit, push) as typed JSON.

Pare Cargo ג€” Structured Rust cargo operations (build, test, clippy, fmt, doc) as typed JSON.

Pare npm ג€” Structured npm/pnpm operations (install, audit, outdated, list, run) as typed JSON.

Pare Build ג€” Structured build output (tsc, esbuild, vite, webpack) as typed JSON diagnostics.