| What it does | A fast, private and offline API client for REST, gRPC, GraphQL and WebSocket services
| Stable domains for local development ports, eliminating conflicts with free open-source tunnels and paid cloud options
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| Stage | Not given
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| Founded | Not given
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| Based in | Not given
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| Pricing model | Open source
| Freemium
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| Pricing | Not given
| Free and Open Source: $0 (unlimited local tunnels, open source); Professional: $49/mo or $490/yr (unlimited cloud tunnels, visitor auth, feedback comments); Team: $149/mo or $1,490/yr (everything in Professional plus unlimited members, teams, shared subdomains, approvals, organization billing); Ente
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| 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
| - Stable local domains (*.portzero.local) for processes and containers
- Cloud tunnels (*.tunnel.portzero.cloud) with HTTPS for LAN and internet access
- Support for multiple programming languages
- Git worktree support with per-branch URLs
- AI agent integration with MCP server
- Visitor authentication and access control
- Feedback comments on live tunnels
- Team access policies and approvals
- Audit log (Enterprise plan)
- Organization billing with no per-seat charges
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| 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
| - Eliminates port conflicts by assigning stable virtual domains instead of port numbers
- Free and open source for local use; no additional cost for cloud features on paid plans
- Flat pricing with no meters, overages, or per-seat charges
- Agent-ready with native MCP server integration for AI coding agents
- Works across multiple OS and languages with zero port bookkeeping required
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| Free plan | Not given
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| Open source | Not given
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| Platforms | Not given
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| Public API | Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 6 ● no change since last check | 1 ● no change since last check |
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| Trust Flow (Majestic) | 5 | 4 |
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| Citation Flow (Majestic) | 26 | 26 |
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| Referring domains (Majestic) | 31 | 135 |
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Chapar
Port Zero