feat: add Node.js and Python SDKs

- Node.js SDK: TypeScript, ESM+CJS, zero deps (uses native fetch)
- Python SDK: zero deps (uses urllib), Python 3.8+
- Both fully documented with examples and type hints
- Ready for npm/PyPI publishing

sdk/python/README.md

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+# SnapAPI Python SDK
+
+Official Python client for [SnapAPI](https://snapapi.eu) — the EU-hosted screenshot API.
+
+**Zero dependencies.** Uses only Python standard library (`urllib`).
+
+## Installation
+
+```bash
+pip install snapapi
+```
+
+## Quick Start
+
+```python
+from snapapi import SnapAPI
+
+snap = SnapAPI("your-api-key")
+
+# Capture a screenshot
+screenshot = snap.capture("https://example.com")
+
+with open("screenshot.png", "wb") as f:
+    f.write(screenshot)
+```
+
+## Usage
+
+### Basic Screenshot
+
+```python
+png = snap.capture("https://example.com")
+```
+
+### With Options
+
+```python
+jpg = snap.capture(
+    "https://example.com",
+    format="jpeg",
+    width=1920,
+    height=1080,
+    quality=90,
+)
+```
+
+### Full-Page Capture
+
+```python
+full = snap.capture(
+    "https://example.com/blog",
+    full_page=True,
+    device_scale=2,  # Retina
+)
+```
+
+### Mobile Viewport
+
+```python
+mobile = snap.capture(
+    "https://example.com",
+    width=375,
+    height=812,
+    device_scale=2,
+)
+```
+
+### Wait for Dynamic Content
+
+```python
+screenshot = snap.capture(
+    "https://example.com/dashboard",
+    wait_for_selector="#chart-loaded",
+    wait_until="networkidle2",
+)
+```
+
+### Error Handling
+
+```python
+from snapapi import SnapAPI, SnapAPIError
+
+snap = SnapAPI("your-api-key")
+
+try:
+    screenshot = snap.capture("https://example.com")
+except SnapAPIError as e:
+    print(f"API error {e.status}: {e.detail}")
+```
+
+## API Reference
+
+### `SnapAPI(api_key, base_url="https://snapapi.eu", timeout=30)`
+
+### `snap.capture(url, **options) -> bytes`
+
+| Option | Type | Default | Description |
+|--------|------|---------|-------------|
+| `url` | `str` | — | URL to capture (required) |
+| `format` | `str` | `"png"` | Output: `png`, `jpeg`, `webp` |
+| `width` | `int` | `1280` | Viewport width (320–3840) |
+| `height` | `int` | `800` | Viewport height (200–2160) |
+| `full_page` | `bool` | `False` | Capture full page |
+| `quality` | `int` | `80` | JPEG/WebP quality (1–100) |
+| `wait_for_selector` | `str` | — | CSS selector to wait for |
+| `device_scale` | `float` | `1` | Device pixel ratio (1–3) |
+| `delay` | `int` | `0` | Extra delay in ms (0–5000) |
+| `wait_until` | `str` | `"domcontentloaded"` | Load event |
+
+### `snap.health() -> dict`
+
+Returns API health status.
+
+## EU-Hosted & GDPR Compliant
+
+SnapAPI runs entirely on EU infrastructure (Germany). Your data never leaves the EU.
+
+## License
+
+MIT — [Cloonar Technologies GmbH](https://snapapi.eu)

sdk/python/pyproject.toml

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+[build-system]
+requires = ["setuptools>=68.0"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "snapapi"
+version = "1.0.0"
+description = "Official Python SDK for SnapAPI — EU-hosted screenshot API"
+readme = "README.md"
+license = {text = "MIT"}
+requires-python = ">=3.8"
+authors = [{name = "Cloonar Technologies GmbH"}]
+keywords = ["screenshot", "api", "webpage", "capture", "eu", "gdpr"]
+classifiers = [
+    "Development Status :: 5 - Production/Stable",
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: MIT License",
+    "Programming Language :: Python :: 3",
+    "Topic :: Internet :: WWW/HTTP",
+]
+
+[project.urls]
+Homepage = "https://snapapi.eu"
+Repository = "https://git.cloonar.com/openclawd/SnapAPI"
+Documentation = "https://snapapi.eu/docs"

sdk/python/src/snapapi/__init__.py

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+"""SnapAPI Python SDK — EU-hosted screenshot API client."""
+
+from .client import SnapAPI, SnapAPIError, ScreenshotOptions
+
+__all__ = ["SnapAPI", "SnapAPIError", "ScreenshotOptions"]
+__version__ = "1.0.0"

sdk/python/src/snapapi/client.py

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+"""SnapAPI client implementation."""
+
+from __future__ import annotations
+
+import urllib.request
+import urllib.error
+import json
+from dataclasses import dataclass, asdict
+from typing import Optional
+
+
+class SnapAPIError(Exception):
+    """Raised when the SnapAPI returns an error response."""
+
+    def __init__(self, status: int, detail: str):
+        self.status = status
+        self.detail = detail
+        super().__init__(f"SnapAPI error {status}: {detail}")
+
+
+@dataclass
+class ScreenshotOptions:
+    """Screenshot capture options."""
+
+    url: str
+    format: Optional[str] = None
+    width: Optional[int] = None
+    height: Optional[int] = None
+    full_page: Optional[bool] = None
+    quality: Optional[int] = None
+    wait_for_selector: Optional[str] = None
+    device_scale: Optional[float] = None
+    delay: Optional[int] = None
+    wait_until: Optional[str] = None
+
+    def to_dict(self) -> dict:
+        """Convert to API request body (camelCase keys)."""
+        mapping = {
+            "url": "url",
+            "format": "format",
+            "width": "width",
+            "height": "height",
+            "full_page": "fullPage",
+            "quality": "quality",
+            "wait_for_selector": "waitForSelector",
+            "device_scale": "deviceScale",
+            "delay": "delay",
+            "wait_until": "waitUntil",
+        }
+        return {
+            mapping[k]: v
+            for k, v in asdict(self).items()
+            if v is not None
+        }
+
+
+class SnapAPI:
+    """SnapAPI client.
+
+    Args:
+        api_key: Your SnapAPI API key.
+        base_url: API base URL (default: https://snapapi.eu).
+        timeout: Request timeout in seconds (default: 30).
+
+    Example::
+
+        from snapapi import SnapAPI
+
+        snap = SnapAPI("your-api-key")
+        screenshot = snap.capture("https://example.com")
+
+        with open("screenshot.png", "wb") as f:
+            f.write(screenshot)
+    """
+
+    def __init__(
+        self,
+        api_key: str,
+        base_url: str = "https://snapapi.eu",
+        timeout: int = 30,
+    ):
+        if not api_key:
+            raise ValueError("api_key is required")
+        self.api_key = api_key
+        self.base_url = base_url.rstrip("/")
+        self.timeout = timeout
+
+    def capture(
+        self,
+        url: Optional[str] = None,
+        *,
+        format: Optional[str] = None,
+        width: Optional[int] = None,
+        height: Optional[int] = None,
+        full_page: Optional[bool] = None,
+        quality: Optional[int] = None,
+        wait_for_selector: Optional[str] = None,
+        device_scale: Optional[float] = None,
+        delay: Optional[int] = None,
+        wait_until: Optional[str] = None,
+        options: Optional[ScreenshotOptions] = None,
+    ) -> bytes:
+        """Capture a screenshot.
+
+        Args:
+            url: URL to capture.
+            format: Output format (png, jpeg, webp).
+            width: Viewport width (320-3840).
+            height: Viewport height (200-2160).
+            full_page: Capture full scrollable page.
+            quality: JPEG/WebP quality (1-100).
+            wait_for_selector: CSS selector to wait for.
+            device_scale: Device pixel ratio (1-3).
+            delay: Extra delay in ms (0-5000).
+            wait_until: Load event (domcontentloaded, load, networkidle0, networkidle2).
+            options: ScreenshotOptions object (alternative to keyword args).
+
+        Returns:
+            Screenshot image as bytes.
+
+        Raises:
+            SnapAPIError: When the API returns an error.
+            ValueError: When url is missing.
+
+        Example::
+
+            # Simple
+            png = snap.capture("https://example.com")
+
+            # With options
+            jpg = snap.capture(
+                "https://example.com",
+                format="jpeg",
+                width=1920,
+                quality=90,
+            )
+
+            # Full-page Retina
+            full = snap.capture(
+                "https://example.com",
+                full_page=True,
+                device_scale=2,
+            )
+        """
+        if options:
+            body = options.to_dict()
+        else:
+            if not url:
+                raise ValueError("url is required")
+            opts = ScreenshotOptions(
+                url=url,
+                format=format,
+                width=width,
+                height=height,
+                full_page=full_page,
+                quality=quality,
+                wait_for_selector=wait_for_selector,
+                device_scale=device_scale,
+                delay=delay,
+                wait_until=wait_until,
+            )
+            body = opts.to_dict()
+
+        data = json.dumps(body).encode()
+        req = urllib.request.Request(
+            f"{self.base_url}/v1/screenshot",
+            data=data,
+            headers={
+                "Content-Type": "application/json",
+                "Authorization": f"Bearer {self.api_key}",
+            },
+            method="POST",
+        )
+
+        try:
+            with urllib.request.urlopen(req, timeout=self.timeout) as resp:
+                return resp.read()
+        except urllib.error.HTTPError as e:
+            detail = f"HTTP {e.code}"
+            try:
+                err_body = json.loads(e.read())
+                detail = err_body.get("error", detail)
+            except Exception:
+                pass
+            raise SnapAPIError(e.code, detail) from e
+
+    def health(self) -> dict:
+        """Check API health status.
+
+        Returns:
+            Health check response dict.
+
+        Example::
+
+            health = snap.health()
+            print(health["status"])  # "ok"
+        """
+        req = urllib.request.Request(f"{self.base_url}/health")
+        with urllib.request.urlopen(req, timeout=self.timeout) as resp:
+            return json.loads(resp.read())