CaspiAPI: API Client
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Description
CaspiAPI is a fast, native API client for developers — a Postman alternative that runs beautifully on iPhone, iPad and Mac. Build requests, inspect responses, run whole collections and automate tests, all from one polished app that works offline and keeps your data encrypted on-device.
Already using Postman? Import your collections and environments in seconds and keep working — your pre-request and test scripts run exactly as they do on the desktop.
BUILT FOR REAL WORK
Full REST/HTTP support — GET, POST, PUT, PATCH, DELETE and more
Multi-tab editor: query params, headers, body (JSON, form, raw), auth
Syntax-highlighted JSON responses with status, timing and size
Request history so you never lose what you sent
POSTMAN-COMPATIBLE SCRIPTING
Run pre-request and test scripts with a real JavaScript engine
pm.* API support — pm.test, pm.environment, pm.response and more
Built-in CryptoJS for HMAC / SHA-256 signing and custom auth flows
Collection Runner executes requests in sequence and chains variables: a value captured in one request is instantly available to the next
POWERFUL VARIABLES & ENVIRONMENTS
5-level variable scope — global, collection, environment, and beyond
Switch environments instantly to move between dev, staging and prod
Edit any scope inline without leaving your request
PRIVATE BY DESIGN
All data stored locally in an AES-256 encrypted database
The encryption key lives in the Secure Enclave (Keychain) — never in plain text
Works fully offline; your requests and secrets stay on your device
NATIVE ON EVERY SCREEN
One app for iPhone, iPad and Mac — buy once, use everywhere
Adaptive layout: touch-friendly action sheets on iOS, full menus on Mac
Beautiful dark and light themes that follow your system automatically
Clean typography built for reading code
Whether you're testing a production API on your phone, debugging a webhook on iPad, or running a full test suite on your Mac, CaspiAPI gives you a focused, secure and genuinely fast workflow.
Download CaspiAPI and bring your API workflow with you — everywhere.