browser-automation

name: browser-automation description: Control a headless Chrome browser via Pinchtab's REST API activation: auto requires: - shell_exec env: - PINCHTAB_URL priority: 50

Browser Automation (Pinchtab)

Use the browser tool for common operations. It handles tab locking, cleanup, and accessibility tree wait times automatically.

Quick Start

1. Navigate (auto-acquires tab, waits 3s, returns snapshot): browser(action="navigate", url="https://example.com")

2. Act on a ref from the snapshot: browser(action="act", kind="click", ref="e5", tabId="<from step 1>")

3. Read text (~800 tokens vs ~10K for full snapshot): browser(action="text", tabId="...")

4. Diff snapshot (only changes, ~90% fewer tokens): browser(action="snapshot", tabId="...", diff=true)

5. List tabs (see lock status): browser(action="tabs")

Core Loop

1. Navigate → opens URL, auto-acquires + locks a tab, returns snapshot
2. Act → click/type/fill/press using refs from the snapshot
3. Snapshot → use diff=true to see only changes (~90% fewer tokens)
4. Repeat 2–3 until done

Tab Management

• The tool acquires and locks a tab automatically on each call
• Pass tabId from a previous result to reuse the same tab
• The tool unlocks the tab when the operation completes (even on failure)
• 20-tab system limit — the tool handles capacity automatically
• Locks auto-expire after timeout; if your tab is stolen, the tool re-acquires from available tabs

Navigate vs Click — Critical Rule

navigate is for going to URLs. click is for interactions with no URL.

When following a link, never click it — extract the URL and navigate directly. Clicking triggers hover states, preview popovers, and JavaScript event handlers that often intercept navigation (search result previews, HackerNews/Reddit card expansions, SPAs with custom routing, sticky overlays). Direct navigation bypasses all of this.

# WRONG — triggers Google preview, HN popover, etc.
browser(action="act", kind="click", ref="e5", tabId="...")

# RIGHT — extract href from snapshot or evaluate, then navigate
browser(action="evaluate", expression="document.querySelector('a.result').href", tabId="...")
browser(action="navigate", url="<extracted url>")

If the snapshot already shows the URL on a link ref, navigate to it directly without touching the DOM at all. Use click only when there is no URL involved: buttons, form submissions, toggles, checkboxes, dropdowns, and in-page UI controls.

Action Kinds

For action="act", use these kind values:

• click — click element by ref (add waitNav=true if it triggers navigation)
• type — type text into element (set text)
• press — press a key (set key, e.g. "Enter")
• fill — set value directly (set text and optionally selector)
• hover — hover over element (triggers dropdowns/tooltips)
• scroll — scroll to element by ref
• select — select dropdown option (set value)
• focus — focus an element

Key Endpoints

All endpoints use flat paths. Multi-tab targeting uses ?tabId=ID query parameter or "tabId" in POST body.

Best Practices

• Always use maxTokens=2000 on snapshots (full trees can exceed 10K tokens)
• Use filter=interactive to see only clickable/input elements
• Use diff=true after actions for ~90% token savings
• Use /text for reading content (~800 tokens/page)
• Use format=compact for most token-efficient snapshots
• Batch interactions with POST /actions for fewer round-trips

File Operations (use shell_exec + curl)

Save screenshots: curl "{{PINCHTAB_URL}}/screenshot?tabId=$TAB&raw=true" \ -H "Authorization: Bearer $BRIDGE_TOKEN" -o /shared/screenshot.png

Export PDF: curl "{{PINCHTAB_URL}}/pdf?tabId=$TAB&output=file&path=/shared/.pinchtab/page.pdf" \ -H "Authorization: Bearer $BRIDGE_TOKEN" && \ cp /shared/.pinchtab/page.pdf /shared/page.pdf

Download file: curl "{{PINCHTAB_URL}}/download?url=URL&output=file&path=/shared/.pinchtab/f.ext" \ -H "Authorization: Bearer $BRIDGE_TOKEN" && \ cp /shared/.pinchtab/f.ext /shared/f.ext

Upload file: curl -X POST "{{PINCHTAB_URL}}/upload" \ -H "Authorization: Bearer $BRIDGE_TOKEN" \ -H 'Content-Type: application/json' \ -d '{"selector":"input[type=file]","paths":["/shared/photo.jpg"],"tabId":"ID"}'

Evaluate JS: curl -X POST "{{PINCHTAB_URL}}/evaluate" \ -H "Authorization: Bearer $BRIDGE_TOKEN" \ -H 'Content-Type: application/json' \ -d '{"expression":"document.title","tabId":"ID"}'

Set cookies: curl -X POST "{{PINCHTAB_URL}}/cookies" \ -H "Authorization: Bearer $BRIDGE_TOKEN" \ -H 'Content-Type: application/json' \ -d '{"url":"https://example.com","cookies":[{"name":"s","value":"v"}]}'

Stealth/fingerprint: curl "{{PINCHTAB_URL}}/stealth/status" -H "Authorization: Bearer $BRIDGE_TOKEN" curl -X POST "{{PINCHTAB_URL}}/fingerprint/rotate" \ -H "Authorization: Bearer $BRIDGE_TOKEN" \ -H 'Content-Type: application/json' -d '{"os":"windows"}'

After saving files to /shared/, use send_media to deliver to the user.

If Blocked

If you encounter CAPTCHAs, 2FA, or login walls, call request_human_assistance with a clear description of the blocker.

Full API reference: cat /shared/.oxydra/skills/BrowserAutomation/references/pinchtab-api.md