What Requestly is

Requestly uses Chrome extension APIs rather than a proxy to intercept browser traffic, with rules that redirect URLs, swap hosts, modify headers and bodies, insert scripts, block or delay requests, and mock REST or GraphQL responses. It is now a BrowserStack product, and the developer also offers a separate desktop API client.

Feature coverage

  • Redirect, host-swap, and header rules
  • Mocked REST and GraphQL responses
  • Script insertion plus request blocking and delays

What stands out

  • Open-source code linked from the listing
  • Large rating sample and current updates
  • No proxy setup, per the developer

Tradeoffs to know

  • Some HTTP Rules features need a paid plan
  • Store lists personally identifiable information
  • Traffic-level access is broad for casual use

Permissions and privacy

Page access

Rewriting headers, redirecting requests, and inserting scripts on the sites you test requires access to page traffic and content on those sites. Run it in a dedicated development profile, scope rules to specific URL patterns, and switch rules off when you return to everyday browsing so a stale redirect does not quietly change a live site.

Data notes

The listing discloses personally identifiable information, which fits an account-based product with sign-in and team collaboration. Rules, mock responses, and shared workspaces can contain internal URLs, tokens, or payloads, so keep secrets out of anything you sync or share, and check the Requestly privacy policy for retention details.

Pricing

Free extension; HTTP Rules and team features have paid plans. Pricing and plan limits change more often than store metadata, so use the linked developer page as the final check before subscribing.

Alternatives

AlternativeTampermonkeyAlternativeWeb Developer

Sources

We used the official Chrome Web Store listing and first-party developer material. Public metrics can change after the fact-check date.

  1. Chrome Web Store listing

    Rating, rating count, public users, version, update date, and publisher disclosures verified 2026-10-12.

  2. Requestly product documentation

    First-party product, feature, support, or project documentation used for workflow context.

  3. Extension Reviewer methodology

    How public claims, permissions, evidence, and tradeoffs are reviewed.

View in Chrome Web Store Developer site
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