Network

chrome-use — Network Interception

Intercept, mock, rewrite, block, and record network traffic on the page you're driving — all via the CDP Fetch domain (no proxy, no extra extension permission).

Mock responses & rewrite requests

network route intercepts matching requests via the CDP Fetch domain (no proxy, no extension permission). Three modes, verbs/fields mirror Playwright:

# Mock the RESPONSE (fulfill — the request never leaves the browser)
chrome-use network route "**/api/users" --body '{"users":[]}' --status 200 --content-type application/json
chrome-use network route "**/api/me" --body '{"vip":true}' --header X-From=mock

# Rewrite the outgoing REQUEST (continue with overrides — real response returns)
chrome-use network route "**/api/save" --method POST --set-header Authorization="Bearer test"
chrome-use network route "**/api/save" --set-body '{"x":1}'          # replace the request body
chrome-use network route "**/v1/*" --rewrite-url https://staging.example.com/v1/thing

# Edit the REAL response (request goes out, response comes back, then tweak it)
chrome-use network route "**/api/me" --edit-status 503                # override status
chrome-use network route "**/api/me" --edit-header X-Env=test         # add/override a response header
chrome-use network route "**/api/me" --replace 'prod=>staging'        # substring-replace in the real body (repeatable)

# Block entirely
chrome-use network route "**/analytics" --abort

# Scope any rule to resource types, and inspect / record traffic
chrome-use network route "**/*.json" --abort --resource-type xhr,fetch
chrome-use network requests --clear        # start capturing fresh
chrome-use network requests                # inspect what fired
chrome-use network har start               # record all traffic
# ... perform actions ...
chrome-use network har stop /tmp/trace.har
chrome-use network unroute                 # drop all routes

Three modes, distinguished by which flags you pass:

• Mock (--body / --status / --header / --content-type): fulfill a fake response, short-circuit the request (never hits the network).
• Rewrite request (--method / --set-body / --set-header / --rewrite-url): change the outgoing request, then let the real response come back.
• Edit real response (--edit-status / --edit-header / --replace 'from=>to'): let the request go out, then tweak the real response before the page sees it. Great for forcing an error state or patching a field without a mock server.

If both a mock and a rewrite are given on one rule, the mock wins. --header / --set-header / --edit-header / --replace are repeatable; request/response headers merge over the originals. Note: editing the top-level document navigation's status can confuse page load — scope response edits to API calls with --resource-type xhr,fetch when needed.