pinchtab

Installation
SKILL.md

PinchTab — Browser Automation for AI Agents

Control Chrome browsers via PinchTab's CLI and HTTP API. Token-efficient (~800 tokens/page), fast startup, stable element references, built-in stealth.

Prerequisites

# Install (pick one)
curl -fsSL https://pinchtab.com/install.sh | bash
brew install pinchtab/tap/pinchtab
npm install -g pinchtab

# Start server (skip if already running)
pinchtab server &
curl -s http://localhost:9867/health

Core Concepts

Server → Profile (prof_XXX) → Instance (inst_XXX) → Tab (tab_XXX) → Element Refs (e0, e1, e5)
  • Profile — Persistent browser data (cookies, storage). Reuse profiles to keep login sessions alive.
  • Instance — Running Chrome process (max 1 per profile).
  • Element Ref — Stable IDs from snapshots for clicking/filling. Re-snapshot after page changes because refs become stale.

Choosing the Right Approach

Situation Approach Why
Hầu hết tasks CLI Đơn giản, không cần parse JSON, 1 lệnh = 1 hành động
Cần batch actions hoặc tích hợp script HTTP API Batch/macro endpoint giảm request overhead
Chỉ cần đọc nội dung trang pinchtab text Token-efficient nhất (~800 tokens)
Cần tương tác (click, fill) pinchtab snap -ic → action Compact interactive snapshot cho refs, rồi act
Sau khi thực hiện action pinchtab snap -d Diff snapshot — chỉ lấy thay đổi, tiết kiệm token
Cần debug visual pinchtab screenshot Token cost cao — chỉ dùng khi text/snap không đủ
Site có bot detection Bật stealth trước pinchtab config set chrome.stealth light

CLI Workflow (Default)

# 1. Navigate
pinchtab nav https://example.com

# 2. Read content (chọn 1)
pinchtab text              # plain text — most efficient
pinchtab snap -ic          # interactive elements only — for interaction
pinchtab quick <url>       # navigate + snapshot in one command

# 3. Interact
pinchtab fill e3 "value"   # fill field (clears first)
pinchtab click e5          # click element
pinchtab press Enter       # keyboard key

# 4. Verify result
sleep 1                    # wait for page update
pinchtab snap -d           # diff snapshot — only changes

Multi-Tab

pinchtab tab new https://source.com    # open new tab
pinchtab tab                           # list tabs with IDs
pinchtab tab tab_XXX                   # switch to tab
pinchtab tab close tab_XXX             # close tab

Error Recovery

Lỗi phổ biến nhất: stale element refs (action fail vì trang đã thay đổi).

Action fail → re-snapshot (pinchtab snap -ic) → retry với ref mới
Lỗi Xử lý
Element ref not found Re-snapshot, dùng ref mới
Server not running pinchtab server &
Instance won't start Kiểm tra pinchtab instances, stop instance cũ nếu cần
Bot detection pinchtab config set chrome.stealth light + --humanize flag

Environment Variables

Variable Purpose Default
PINCHTAB_PORT Server port 9867
PINCHTAB_TOKEN API auth token (thêm -H "Authorization: Bearer $TOKEN" nếu set) (none)
PINCHTAB_HEADLESS Headless mode true

Reference

Chi tiết tra cứu khi cần:

  • HTTP API — Endpoints, payloads, response formats, error codes. Đọc khi cần gọi HTTP API trực tiếp.
  • CLI commands — Tất cả CLI commands + flags. Đọc khi cần tìm lệnh cụ thể hoặc flags nâng cao.
  • Workflow patterns — 12 patterns phổ biến (scraping, login, pagination, stealth, multi-tab...). Đọc khi gặp scenario phức tạp cần tham khảo.
Related skills
Installs
14
First Seen
Mar 21, 2026