Best Products Built with REST API (Freemium) in 2026
21 freemium rest api products, ranked by community upvotes.
Sorsa API
Fast, read-only X (Twitter) API & scraper — from $0.02 per 1K tweets
Website to Markdown API
Submit any URL, get clean Markdown back — full page, metadata, JS-rendered pages supported.
Stealth Analytics
High-speed, privacy-first analytics with 0.7KB payloads and REST API ingestion
Watchplane
Uptime monitoring, incident management, status pages, and smart alerts.
LuaLock
Compile Lua/Luau/Roblox scripts into per-build private bytecode VMs to prevent decompilation
Formfeed
PDF, e-invoice and image API for developers and AI agents
imagetosvgcom
Free AI-powered PNG/JPG to SVG conversion — no watermarks, fast and Cricut-ready.
Stashbase
Securely manage secrets, env vars, and access for developers and AI agents
PostWing
All-in-one REST API for posting to Instagram, TikTok, LinkedIn, YouTube, X and more.
podEssence
AI-curated podcast highlights in the original voice.
Iconfyra
Icon font for modern web — 4,500+ SVG icons, CDN & API
a777lt
Privacy-first, ad-free URL shortener with real click analytics.
DataForB2B
Real-time B2B people & company data API for AI agents in sales, recruiting, investment.
OpenInboxio
One-click private temporary email — disposable inboxes, real-time delivery, no signup.
Looona
Self-hosted feedback management — collect, organize and forward user feedback.
vatnode
VIES REST API for audit-ready EU VAT validation, company data and VAT rates
RankParse
Pay-per-lookup backlink API — from $0.01 per call, no subscription
SENTRAX
Professional cybersecurity suite: 10 network scanners, dashboard, REST API, JWT + 2FA
BoostRail
One OpenAI- and Anthropic-compatible API for 71 text, image & video models
ApiJolt
One-call document conversion API — HTML, DOCX, PDF & 10+ formats, zero infrastructure.
xtrackingme
Real-time, multi‑carrier package tracking with automatic carrier detection