Mockarty Capture

Capture, mock & intercept browser traffic: breakpoints, chaos, macros, replay — your in-browser Mockarty testing assistant.

Mockarty Capture is your in-browser API testing toolkit — inspect real traffic, mock it, break it, and automate it, all from a side panel next to the page you're testing. CAPTURE Start a session and the extension records every HTTP/HTTPS request the page makes — method, URL, headers, request and response bodies. Search and filter the live feed, copy any request as cURL, or export the whole session to a Postman collection, a HAR file, or Mockarty mocks. MOCK & INTERCEPT Turn any request into a canned response without touching your backend. Return custom status codes, headers and bodies; map a URL to a local response (Map-Local); rewrite or redirect requests; add or strip headers. Static rules run banner-free; advanced rules use Chrome's debugger to rewrite bodies on the fly. BREAKPOINTS Pause a request or response mid-flight, inspect it, edit it, then resume — like DevTools breakpoints, but for the network. CHAOS & THROTTLING Test how your app behaves under stress: inject latency, errors, timeouts, truncated or malformed responses, and slow streams. Apply 3G/4G throttle presets to emulate poor networks. TEMPLATED MOCKS Generate dynamic responses with Faker-style helpers and request-aware placeholders ({{uuid}}, {{request.query.id}}, fake names/emails/dates) so every call returns fresh, realistic data. MACROS — RECORD & REPLAY Click through a flow once, then replay it automatically on the page — a lightweight way to repeat a manual test run hands-free. Replay survives navigation. GRAPHQL-AWARE Match rules by GraphQL operation name — robustly handles batched queries, GET GraphQL, raw documents and comments. Operation names autocomplete from your captured traffic. COLLECTIONS, PROFILES & SHARING Organise rules into groups, save and switch profiles/environments, master-switch everything on or off, and share a rule set as a URL. WORKS WITH OR WITHOUT A SERVER Everything above runs fully client-side — no account needed. Connect your own Mockarty server (pairing or an API token) to stream captures into mocks and test cases, get a notification hub with deep links, reply to agent tasks, and see your running tests — right in the panel. PRIVACY Capture and interception only run while you turn them on. Your data goes only to the Mockarty server you configure — never to the extension authors or any third party. A modern, open alternative to the Postman Interceptor.