#rest

Crustdata

A real-time API for company and people data — sales, recruiting and investing teams query it directly, or plug it straight into Claude via MCP, instead of buying a static list that's already stale.

WorldIP.io

A free API that tells you where an IP address is, who owns it, and whether it looks like a VPN, proxy, or datacenter — usable instantly with no signup, and with paid tiers if you need higher volume or fraud-detection-grade data.

Scalar

An open-source API documentation platform and REST client that turns an OpenAPI or AsyncAPI spec into interactive docs and multi-language SDKs, syncing automatically with your code via Git so docs never drift out of date.

Datahyena

An API that tells you the moment a company raises funding, gets acquired, or hires a new exec — clean, deduplicated data you can plug straight into a CRM instead of building your own company-tracking database.

qAPI

Tests whether your APIs actually work — including the AI-powered ones — without needing someone on the team who can write test-automation code, since it's built to be set up by clicking rather than scripting.

ApyHub

Instead of building and maintaining your own code for boring-but-necessary tasks — converting a file, validating an email, resizing an image — ApyHub gives you over 200 ready-made APIs behind a single login and a single bill.

Tabstack

A service that reads and interacts with web pages for you — pulling structured data, converting pages to clean text, or automating a browser task — through a simple API call, without you having to run and maintain your own scraper.

Firma.dev

A developer API that adds legally-binding e-signatures to any app for a few cents per document, instead of days of DocuSign integration work.

Mireye

API that gives AI agents reliable, sourced facts about any US location — terrain, flood risk, building data — so an agent can answer questions about the physical world instead of guessing.

Requesty

A single API endpoint that talks to 600+ AI models from 30+ providers, so switching from one AI model to another — or spreading requests across several for cost or reliability — doesn't mean rewriting your app's code.

Apiable

A ready-made storefront and billing layer that sits on top of your existing API gateway, so external developers can discover, sign up for, and pay to use your APIs without your team building that portal from scratch.

Thunder Client

Lightweight REST/WebSocket/gRPC API client built into VS Code and JetBrains — no app switching, local-first, git-syncable.

RAML

RESTful API Modeling Language, a simple and succinct way of describing practically-RESTful APIs.

API Blueprint

Tools for your whole API lifecycle. Use it to discuss your API with others. Generate documentation automatically. Or a test suite. Or even some code.