Remote Browser Service

Browser control for AI agents via HTTP API. Workflow: navigate, snapshot, act.

Setup

Ensure you have an active session:

1. Create session — POST /api/sessions (HTTP, no WebSocket), or open WebSocket to /ws/{session_id} (DevTools CDP), or run from UI
2. Or restore — Use stored session from GET /api/stored-sessions
3. Auth — Pass Authorization: Bearer <token> or X-API-Key, or ?access_token=<token>

Base URL: https://rb.all-completed.com (or RBS_BASE_URL). Replace {session_id} in examples. User ID is derived from the token.

Core Workflow

1. Navigate to a URL
2. Snapshot the accessibility tree (get refs) — GET .../json
3. Act on refs or selectors (click, type, fill, press)
4. Snapshot again to see results

Refs (e0, e1, …) from /json can be used with /action via selector (use ref as selector for e5 → "e5" maps to role/name; for now use CSS selector).

API Reference

Create session (HTTP)

curl -X POST "https://rb.all-completed.com/api/sessions" \
  -H "Authorization: Bearer <token>" \
  -H "Content-Type: application/json" \
  -d '{}'
# Optional body: {"session_id": "my-session"}

Sessions idle for 5 min are closed. Use POST .../ping to keep alive.

List sessions

curl "https://rb.all-completed.com/api/sessions" \
  -H "Authorization: Bearer <token>"

List stored sessions

curl "https://rb.all-completed.com/api/stored-sessions" \
  -H "Authorization: Bearer <token>"

Returns {sessions: [...], count}. Connect via WebSocket to /ws/{session_id} to resume.

Navigate

curl -X POST "https://rb.all-completed.com/api/sessions/{session_id}/navigate" \
  -H "Authorization: Bearer <token>" \
  -H "Content-Type: application/json" \
  -d '{"url": "https://example.com"}'

# With timeout (seconds)
curl -X POST "https://rb.all-completed.com/api/sessions/{session_id}/navigate" \
  -H "Authorization: Bearer <token>" \
  -H "Content-Type: application/json" \
  -d '{"url": "https://example.com", "timeout": 60}'

Snapshot (accessibility tree)

# Full tree
curl "https://rb.all-completed.com/api/sessions/{session_id}/json" \
  -H "Authorization: Bearer <token>"

# Interactive elements only (buttons, links, inputs) — much smaller
curl "https://rb.all-completed.com/api/sessions/{session_id}/json?filter=interactive" \
  -H "Authorization: Bearer <token>"

# Limit depth
curl "https://rb.all-completed.com/api/sessions/{session_id}/json?depth=5" \
  -H "Authorization: Bearer <token>"

Returns {nodes: [{ref, role, name, depth, value?, disabled?, focused?, nodeId?}], count}.

Extract text

# Readability mode (default) — strips nav/footer/ads
curl "https://rb.all-completed.com/api/sessions/{session_id}/text" \
  -H "Authorization: Bearer <token>"

# Raw innerText
curl "https://rb.all-completed.com/api/sessions/{session_id}/text?mode=raw" \
  -H "Authorization: Bearer <token>"

Returns {url, title, text}. Cheapest option (~800 tokens for most pages).

Screenshot

# JSON with base64
curl "https://rb.all-completed.com/api/sessions/{session_id}/screenshot" \
  -H "Authorization: Bearer <token>"

# Raw JPEG bytes
curl "https://rb.all-completed.com/api/sessions/{session_id}/screenshot?raw=true" \
  -H "Authorization: Bearer <token>" \
  -o screenshot.jpg

# With quality (1-100)
curl "https://rb.all-completed.com/api/sessions/{session_id}/screenshot?quality=50&raw=true" \
  -H "Authorization: Bearer <token>" \
  -o screenshot.jpg

Act on elements

# Click by selector
curl -X POST "https://rb.all-completed.com/api/sessions/{session_id}/action" \
  -H "Authorization: Bearer <token>" \
  -H "Content-Type: application/json" \
  -d '{"kind": "click", "selector": "button.submit"}'

# Type into element (focus + insertText)
curl -X POST "https://rb.all-completed.com/api/sessions/{session_id}/action" \
  -H "Authorization: Bearer <token>" \
  -H "Content-Type: application/json" \
  -d '{"kind": "type", "selector": "#email", "text": "user@example.com"}'

# Fill (set value directly)
curl -X POST "https://rb.all-completed.com/api/sessions/{session_id}/action" \
  -H "Authorization: Bearer <token>" \
  -H "Content-Type: application/json" \
  -d '{"kind": "fill", "selector": "#email", "text": "user@example.com"}'

# Press a key
curl -X POST "https://rb.all-completed.com/api/sessions/{session_id}/action" \
  -H "Authorization: Bearer <token>" \
  -H "Content-Type: application/json" \
  -d '{"kind": "press", "key": "Enter"}'

# Focus, hover, select, scroll
curl -X POST "https://rb.all-completed.com/api/sessions/{session_id}/action" \
  -H "Authorization: Bearer <token>" \
  -H "Content-Type: application/json" \
  -d '{"kind": "focus", "selector": "input[name=search]"}'

curl -X POST "https://rb.all-completed.com/api/sessions/{session_id}/action" \
  -H "Authorization: Bearer <token>" \
  -H "Content-Type: application/json" \
  -d '{"kind": "scroll", "scrollY": 800}'

Action kinds: click, type, fill, press, focus, hover, select, scroll. Use selector (CSS) or ref (from snapshot). For press use key (e.g. Enter, Tab).

HTML snapshot

# Full DOM with inlined CSS (opens in browser)
curl "https://rb.all-completed.com/api/sessions/{session_id}/html" \
  -H "Authorization: Bearer <token>"

Token Cost Guide

Method	Typical tokens	When to use
/text	~800	Reading page content
/json?filter=interactive	~3,600	Finding buttons/links to click
/json	~10,500	Full page structure
/screenshot	~2K (vision)	Visual verification

Strategy: Use /text when you only need content. Use /json?filter=interactive for action-oriented tasks. Use full /json for complete page understanding. Use /screenshot for visual checks.

Environment Variables

Var	Description
RBS_BASE_URL	Base URL (e.g. https://rb.all-completed.com)
AC_API_KEY	Bearer token or API key (user_id derived from token)

Tips

• Session required — Ensure a session exists before calling navigate/json/text/action. Create via POST /api/sessions (HTTP), WebSocket, or restore from stored sessions.
• Refs from snapshot — Use selector with the ref string (e.g. "e5") when the action API supports ref→DOM resolution; otherwise prefer CSS selectors.
• Readability vs raw — /text (default) strips nav/footer/ads; ?mode=raw returns full innerText.
• Interactive filter — ?filter=interactive on /json reduces nodes by ~75% for action tasks.
• Stored sessions — Sessions persist to S3 when WebSocket closes; list with GET /api/stored-sessions, then connect via WebSocket to resume.