Charles Proxy website screenshot

Charles Proxy

Charles Proxy is an HTTP proxy and HTTP monitor that enables developers to view all HTTP and SSL/HTTPS traffic between their machine and the Internet, including requests, responses, and HTTP headers. It supports SSL proxying, bandwidth throttling, AJAX debugging, AMF inspection, breakpoints, content rewriting, and traffic recording for API debugging, testing, and development workflows on Windows, macOS, and Linux.

Charles Proxy publishes 1 API on the APIs.io network. Tagged areas include API Debugging, API Testing, HTTP Debugging, HTTP Proxy, and SSL Proxying.

Charles Proxy’s developer surface includes documentation, pricing, support, engineering blog, and 5 more developer resources.

🌐 Visit website 📡 Source on GitHub
25.2/100 emerging ▬ flat Agent 3/100 human only Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessFreemium
1 APIs
API DebuggingAPI TestingHTTP DebuggingHTTP ProxySSL ProxyingTraffic MonitoringWeb Development

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 25.2/100 · emerging
Contract Quality 0.0 / 25
Developer Ergonomics 3.0 / 20
Commercial Clarity 12.1 / 20
Operational Transparency 4.1 / 13
Governance 0.0 / 12
Discoverability 5.9 / 10
Agent readiness — 3/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/charles-proxy: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

Charles Proxy

Charles Proxy is a cross-platform desktop HTTP proxy and monitor that sits between client applications and the Internet to capture, inspect, and modify traffic. It supports SSL ...

Pricing Plans 1

Published pricing tiers and plan structures.

Charles Proxy Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Charles Proxy Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Charles Proxy Finops

FINOPS

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Charles Proxy Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

LatestVersion
LatestVersion

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support
Support

Commercial 2

Pricing, plans, and the legal terms of use

Pricing
Pricing
 PrivacyPolicy
PrivacyPolicy

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Other 1

Properties that don't map to a standard resource type

Download
Download

Source (apis.yml)

apis.yml Raw ↑ 
aid: charles-proxy
name: Charles Proxy
description: Charles Proxy is an HTTP proxy and HTTP monitor that enables developers to view all HTTP and SSL/HTTPS traffic
  between their machine and the Internet, including requests, responses, and HTTP headers. It supports SSL proxying, bandwidth
  throttling, AJAX debugging, AMF inspection, breakpoints, content rewriting, and traffic recording for API debugging, testing,
  and development workflows on Windows, macOS, and Linux.
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/charles-proxy.png
url: https://raw.githubusercontent.com/api-evangelist/charles-proxy/refs/heads/main/apis.yml
type: Index
access: 3rd-Party
position: Consumer
tags:
- API Debugging
- API Testing
- HTTP Debugging
- HTTP Proxy
- SSL Proxying
- Traffic Monitoring
- Web Development
created: '2026-03-26'
modified: '2026-04-23'
specificationVersion: '0.20'
apis:
- aid: charles-proxy:charles-proxy
  name: Charles Proxy
  description: Charles Proxy is a cross-platform desktop HTTP proxy and monitor that sits between client applications and
    the Internet to capture, inspect, and modify traffic. It supports SSL proxying with certificate trust, bandwidth and latency
    throttling, AJAX and AMF inspection, request and response breakpoints, rewrite rules, and replay tooling for testing APIs
    and web integrations.
  humanURL: https://www.charlesproxy.com
  tags:
  - API Debugging
  - HTTP Debugging
  - HTTP Proxy
  - SSL Proxying
  - Traffic Monitoring
  properties:
  - type: Documentation
    url: https://www.charlesproxy.com/documentation/
  - type: GettingStarted
    url: https://www.charlesproxy.com/documentation/getting-started/
  - type: Configuration
    url: https://www.charlesproxy.com/documentation/configuration/
  - type: Installation
    url: https://www.charlesproxy.com/documentation/installation/
  - type: Tools
    url: https://www.charlesproxy.com/documentation/tools/
  - type: Proxying
    url: https://www.charlesproxy.com/documentation/proxying/
  - type: Download
    url: https://www.charlesproxy.com/download/
  - type: FAQ
    url: https://www.charlesproxy.com/documentation/faqs/
common:
- type: DomainSecurity
  url: security/charles-proxy-domain-security.yml
- type: Website
  url: https://www.charlesproxy.com
- type: Documentation
  url: https://www.charlesproxy.com/documentation/
- type: Download
  url: https://www.charlesproxy.com/download/
- type: Pricing
  url: https://www.charlesproxy.com/buy/
- type: Support
  url: https://www.charlesproxy.com/documentation/faqs/
- type: LatestVersion
  url: https://www.charlesproxy.com/latest-release/download.do
- type: PrivacyPolicy
  url: https://www.charlesproxy.com/privacy/
- type: Blog
  url: https://www.charlesproxy.com/news/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com