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Probe

Free plan AndroidAPIiPhoneMacWindows

What Probe is

Probe is a local HTTP/HTTPS debugging proxy and API client for inspecting application traffic, changing requests and responses, mocking endpoints, and automating API work. It can capture and decrypt traffic from iPhone and Android devices, simulators, desktop apps, and terminal clients, displaying headers, bodies, and timing. Breakpoints pause requests or responses so users can edit them before continuing or aborting. Map Local can return a file or inline body for matching URLs, while Map Remote forwards matching traffic to another host. Visual flows chain requests, extract values, check results, branch, and loop; they can run in the app, through the REST API or MCP, or with a headless CLI. The API client supports HTTP and GraphQL, collections, environments, authentication, and history, with cURL or Postman import and Postman v2.1 export. Probe also has an MCP server for compatible clients such as Claude Code, Cursor, and Codex. Its free plan costs nothing and includes HTTPS interception, mobile debugging, inspection, breakpoints, JavaScript scripting, collections, session handling, and network throttling.

Who it suits

Probe suits developers who need to inspect or modify app traffic, create API mocks, or automate request workflows. Users debugging HTTPS must install and trust Probe’s CA certificate on each device.

What it does well

Captures traffic from mobile, desktop, and terminal clients
Breakpoints allow request and response editing
Supports HTTP and GraphQL API work
Free plan includes HTTPS interception and network throttling
Says captured traffic and session data stay on-device

What to know first

HTTPS inspection requires installing and trusting a CA certificate
Android 7+ apps must opt in to user-installed CAs
Desktop app requires macOS 12+ or Windows 10+

Limits

The Free plan includes HTTPS interception, mobile debugging, request and response inspection, breakpoints, JavaScript scripting, collections, session save/load and export, and network throttling.

Plans

Plan	Billed and limits	Price
Free	HTTPS interception · iOS & Android debugging · request/response inspection · breakpoints & JavaScript scripting · collections · session save/load & export · network throttling	Free
Pro	Coming soon · Everything in Free · advanced scripting & automation · Map Remote & Map Local · team collection sharing · priority support	On request

As useprobe.app lists them, read 8 Oct 2026. The maker's own page has the final word.

Getting started

Open https://useprobe.app/.
Install Probe on a supported platform: Android, iOS, macOS, or Windows.
For HTTPS inspection, install and trust Probe’s CA certificate on each device.
Use the free plan to access its listed inspection, breakpoints, collections, and throttling features.

Verdict

Probe combines traffic inspection, API requests, mocking, and visual automation in a local tool. Its HTTPS setup requires per-device certificate trust, and Android app support for user-installed certificates is limited to apps that opt in.

Questions

Does Probe have a free plan?

Yes. The Free plan costs nothing and includes HTTPS interception, inspection, breakpoints, collections, and network throttling.

Which platforms does Probe support?

Its listed platforms are Android, iOS, macOS, Windows, and API. The desktop app supports macOS 12+ on Apple Silicon or Intel and Windows 10+.

Does HTTPS inspection require setup?

Yes. You must install and trust Probe’s locally generated CA certificate on each device. Android 7+ only trusts user-installed certificates for apps that opt in.

Does Probe require an account?

No. Its privacy policy says Probe does not require an account and does not collect analytics.

Facts from Probe's own pages

AI integrations: Probe has a built-in MCP server for Claude Code, Cursor, Codex, and other compatible clients to inspect and replay traffic and manage mocks and flows. · useprobe.app, 8 Oct 2026
API client: The client supports HTTP and GraphQL, collections, environments, auth, and history; it imports cURL or Postman and exports to Postman v2.1. · useprobe.app, 8 Oct 2026
Automation: Visual flows can chain requests, extract values, assert on results, branch, loop, and run from the app, REST API, MCP, or headless CLI. · useprobe.app, 8 Oct 2026
Desktop support: Probe’s desktop app supports macOS 12+ on Apple Silicon or Intel and Windows 10+. · useprobe.app, 8 Oct 2026
Founded: 2021 · useprobe.app, 28 Sept 2026
Headquarters: Tokyo, Japan · useprobe.app, 28 Sept 2026
HTTPS security detail: Probe performs HTTPS interception using a locally generated CA, so it can see decrypted traffic routed through it; the policy says that data is not transmitted elsewhere. · useprobe.app, 8 Oct 2026
Mocking and routing: Map Local can answer matching URLs with a local file or inline body, while Map Remote can forward them to another host. · useprobe.app, 8 Oct 2026
Other integrations: Probe lists file browsing and transfers over SFTP, FTP/FTPS, S3, and WebDAV. · useprobe.app, 8 Oct 2026
Product: Probe is a local HTTP/HTTPS debugging proxy and API client for inspecting app traffic, mocking APIs, and automating requests. · useprobe.app, 8 Oct 2026
Response editing: Breakpoints let users pause requests or responses, edit headers and bodies, then continue or abort. · useprobe.app, 8 Oct 2026
Security and privacy: The privacy policy says captured traffic and session data stay on the device, private CA keys never leave it, and Probe does not collect analytics or require an account. · useprobe.app, 8 Oct 2026
Setup limitation: HTTPS inspection requires installing and trusting Probe’s CA certificate on each device; Android 7+ only trusts user-installed CAs for apps that opt in. · useprobe.app, 8 Oct 2026
Support: The documentation directs users who cannot find an answer to open a GitHub issue, and the privacy policy lists an email contact for policy questions. · useprobe.app, 8 Oct 2026
Traffic capture: It captures and decrypts HTTP/HTTPS requests from iPhone, Android, simulator, desktop apps, and terminal clients, showing headers, bodies, and timing. · useprobe.app, 8 Oct 2026

Where Probe stands on Freedom251

Local Development Proxy Tools#7 of 24
Web Debugging Proxies#8 of 27