Chapar vs Agent Caffeine

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Chapar compared with Agent Caffeine
Detail	Chapar	Agent Caffeine
What it does	A fast, private and offline API client for REST, gRPC, GraphQL and WebSocket services	Keep your Mac awake while AI agents work, also with the lid closed
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	TR
Pricing model	Open source	Free trial
Pricing	Not given	Free for 7 days. After trial: $9 once (launch price), full price $14. One payment covers up to 3 Macs. Includes 1 year of updates.
Key features	REST and HTTP with every method, query and path params, JSON, XML, text, form-data, URL-encoded and binary bodies gRPC with server reflection or proto files, unary and server-streaming calls, metadata and trailers, TLS and mutual TLS GraphQL queries and variables with data and errors split out WebSocket text, JSON and binary messages with live message log Traffic proxy to capture HTTP(S) traffic of apps and phones Python scripting for pre and post-request scripts with tests Test cases and CI integration with chapar-cli Environments with variables and secret values encrypted with OS keychain Import Postman collections, OpenAPI specs and proto files Code generation for cURL, Python, Go, JavaScript, Java, Ruby and .NET	Detects 40+ AI coding agents automatically Keeps Mac awake with lid closed Pause for 30 minutes, 1 hour, or until tomorrow Stay reachable for 1, 2, or 4 hours Display dims as lid closes Sound notification when lid closes iPhone hotspot fallback when Wi-Fi drops Battery level indicator in menu bar Command-line integration and MCP server support
What makes it different	Local-only data with no cloud sync or telemetry GPU-rendered native UI that starts quickly and runs on macOS, Linux and Windows without a browser engine Collections stored as YAML files in git for version control Built-in traffic proxy for inspecting and importing HTTP(S) traffic from other apps Free and open source under BSD 3-Clause license	Agent-aware sleep prevention knows when your agents work and only keeps Mac awake during actual work Closes lid without waking Mac or draining battery Automatic iPhone hotspot switching when Wi-Fi drops Works on up to 3 Macs with one lifetime purchase No subscription required after one-time purchase
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	6 no change since last check	11 +2 (up) since last check
Trust Flow (Majestic)	5	6
Citation Flow (Majestic)	26	33
Referring domains (Majestic)	31	8

4 details filled in for both companies.

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