# Oxide APIs > Edge-native utility APIs built in Rust/WASM on Cloudflare Workers. Sub-5ms cold starts and 10–200× lower cost than legacy SaaS competitors. Distributed through the RapidAPI marketplace. Oxide APIs ships small, focused HTTP APIs that solve common backend chores — cryptographic hashing, data validation, barcode and QR generation — without the operational baggage. Every endpoint is implemented in Rust, compiled to WebAssembly, and deployed to Cloudflare Workers' 300+ global edge locations. There is no cold-start penalty, no JIT warm-up, and no garbage-collector pauses. Authentication, billing and rate-limiting are handled by RapidAPI. ## APIs - [Hash & Encryption Toolkit](https://oxideapis.com/docs/hash-toolkit): MD5, SHA-256, SHA-512, BLAKE3, bcrypt, Argon2 hashing; HMAC signing; timing-safe verification; secure token generation (UUID, hex, base64). - [Data Validator](https://oxideapis.com/docs/data-validator): Email format & disposable detection, E.164 phone normalization, URL parsing, Luhn credit-card validation, IBAN (ISO 13616) validation. - [Barcode Generator](https://oxideapis.com/docs/barcode-gen): QR codes (error correction L/M/Q/H), Code 128, EAN-13, UPC-A, Code 39. Returns clean SVG, no fonts or raster images required. ## Pricing Every API has a free tier (no credit card). Paid tiers start at $5/month for 50K requests. All billing is on RapidAPI: ## Architecture - Stack: Rust → WebAssembly → Cloudflare Workers - Latency: sub-5ms cold start, p99 typically <15ms globally - Auth: `X-RapidAPI-Key` header (managed by RapidAPI) - Format: JSON in, JSON out (errors follow `{ "error": "...", "code": }`) - Health check: every API exposes `GET /v1/health` (no auth required) ## Pages - [Home](https://oxideapis.com/) - [Hash & Encryption Toolkit docs](https://oxideapis.com/docs/hash-toolkit) - [Data Validator docs](https://oxideapis.com/docs/data-validator) - [Barcode Generator docs](https://oxideapis.com/docs/barcode-gen) - [Pricing](https://oxideapis.com/pricing) - [Use cases](https://oxideapis.com/use-cases) - [Free tools](https://oxideapis.com/tools) - [Frequently asked questions](https://oxideapis.com/faq) - [About](https://oxideapis.com/about)