ApiClient vs Stream HTTP Sniffer

ApiClient is a mobile developer client to test, debug, and manage REST, GraphQL, and WebSocket APIs anytime, anywhere directly on your iOS device. No need to open your laptop just to test an API endpoint, inspect SSE event streams, test FCM push notifications, or generate code snippets. ApiClient gives you desktop-grade API testing power on mobile. KEY FEATURES 1. Multi-Protocol API Testing • REST Client: Support for GET, POST, PUT, DELETE, PATCH, HEAD, and OPTIONS. • GraphQL Suite: Dedicated Query and Variables editor with syntax formatting and error handling. • Real-Time WebSockets: Connect to ws:// and wss:// endpoints with live frame logging, custom headers, and message composer. • Live SSE Streaming: Inspect Server-Sent Events in real-time for AI and LLM streaming APIs. 2. Postman & OpenAPI Compatibility • Postman Collections: Support for Postman Collection v1, v2.0, and v2.1 with multi-level nested folders. • OpenAPI / Swagger: Import OpenAPI 2.0 and 3.0 specifications in both JSON and YAML. • 1-Click cURL: Instant cURL import from clipboard and export to cURL. 3. 9-Language Code Generator Convert API requests into clean, ready-to-run code snippets: • Python (requests) • JavaScript (fetch) • Kotlin (OkHttp) • Swift (URLSession) • Dart / Flutter (http) • Go (net/http) • PHP (cURL) • Java (OkHttp) • cURL command 4. Push Notification Tester (FCM HTTP v1) • FCM HTTP v1 support with on-device OAuth2 token generation. • Import Service Account JSON securely or use Bearer tokens. • Custom notification payloads and topic messaging. 5. Session Cookie Manager & Variables • Automatic Cookie Jar captures response Set-Cookie headers. • Domain-grouped cookie inspector with add, edit, and clear capabilities. • Dynamic Variables: Use {{variable}} substitution across URLs, headers, and request bodies. 6. Developer Power Tools • AI Response Diagnostics: Instant offline root-cause troubleshooting for HTTP errors. • JSON Formatter: Beautify and minify JSON with syntax highlighting. • Crypto Suite: Base64 and AES 128/256 Encryption and Decryption utilities. • History & Collections: Auto-saves request history with search, export, and quick replay. 7. Modern UI & Dark Theme • Full Dark and Light theme parity with automatic system theme synchronization. • Clean, responsive interface optimized for all screen sizes. 8. 100% Private & Local-First Your API keys, tokens, requests, and cookies stay strictly on your device. Zero cloud sync, zero telemetry, and zero middleman servers.

Stream HTTP Packet Capture Tool is a mobile HTTP/HTTPS packet capture and network debugging tool. It is used for local packet capture on the client side, intended solely for local network debugging by QA and development teams. You can capture and view all HTTP/HTTPS requests and responses on your device without connecting to a computer, making it easy to debug application network issues. 1. Capture HTTP & HTTPS requests, with HTTPS requests requiring the configuration of a CA certificate. 2. Access capture history to preview request bodies and response bodies, currently supporting text, JSON, files, and forms. 3. Domain Filtering: Intercept only the traffic you need, avoiding interference with other applications. 4. Request Rewriting: Supports redirection and replacement of request or response messages, and modifications based on regular expressions. 5. Request Blocking: Block requests based on URLs to prevent them from being sent to the server. 6. Scripting: Write JavaScript scripts to handle requests or responses. 7. Search: Search requests based on keywords, response types, and various conditions. Before you start using the tool, please read the following: 1. The target audience for Stream HTTP Packet Capture Tool includes front-end developers, client developers, back-end developers, DevOps engineers, QA engineers, and general users with some network analysis skills. 2. The sole purpose of Stream HTTP Packet Capture Tool is network debugging, and it has no other intended purposes. Additionally, enabling Stream requires your authorization for VPN permissions. 3. Stream HTTP Packet Capture Tool does not upload any user data. Please use it with confidence, and we hope our trusted users will share it with industry professionals. If you do not agree with the above purposes, lack network analysis skills, or inherently distrust third-party apps with sensitive data, we recommend you carefully consider before downloading.