feat(api): support asImage=true on screen and zoom

README.md

@@ -4,8 +4,8 @@ Let an Agent interact with your computer over HTTP, with grid-aware screenshots
 
 ## What this provides
 
-- **Visual endpoints**: full-screen capture with optional grid overlay and labeled cells
+- **Visual endpoints**: full-screen capture with optional grid overlay and labeled cells (`asImage=true` can return raw image bytes)
-- **Zoom endpoint**: crop around a point with denser grid for fine targeting
+- **Zoom endpoint**: crop around a point with denser grid for fine targeting (`asImage=true` supported)
 - **Action endpoints**: move/click/right-click/double-click/middle-click/scroll/type/hotkey
 - **Coordinate transform metadata** in visual responses so agents can map grid cells to real pixels
 - **Safety knobs**: token auth, dry-run mode, optional allowed-region restriction

docs/API.md

@@ -22,8 +22,9 @@ Query params:
 - `include_labels` (bool, default `true`)
 - `image_format` (`png`|`jpeg`, default `png`)
 - `jpeg_quality` (1-100, default `85`)
+- `asImage` (bool, default `false`) — if `true`, return raw image bytes only (`image/png` or `image/jpeg`)
 
-Response includes base64 image and metadata (`meta.region`, optional `meta.grid`).
+Default response includes base64 image and metadata (`meta.region`, optional `meta.grid`).
 
 ## `POST /zoom`
 
@@ -44,7 +45,11 @@ Body:
 }
 ```
 
-Returns cropped image + region metadata in global pixel coordinates.
+Query params:
+
+- `asImage` (bool, default `false`) — if `true`, return raw image bytes only (`image/png` or `image/jpeg`)
+
+Default response returns cropped image + region metadata in global pixel coordinates.
 
 ## `POST /action`
 

server/app.py

@@ -5,7 +5,7 @@ import time
 import uuid
 from typing import Literal, Optional
 
-from fastapi import Depends, FastAPI, Header, HTTPException
+from fastapi import Depends, FastAPI, Header, HTTPException, Response
 from pydantic import BaseModel, Field, model_validator
 
 
@@ -160,13 +160,17 @@ def _capture_screen():
         return image, {"x": mon["left"], "y": mon["top"], "width": mon["width"], "height": mon["height"]}
 
 
-def _encode_image(image, image_format: str, jpeg_quality: int) -> str:
+def _serialize_image(image, image_format: str, jpeg_quality: int) -> bytes:
     buf = io.BytesIO()
     if image_format == "jpeg":
         image.save(buf, format="JPEG", quality=jpeg_quality)
     else:
         image.save(buf, format="PNG")
-    return base64.b64encode(buf.getvalue()).decode("ascii")
+    return buf.getvalue()
+
+
+def _encode_image(image, image_format: str, jpeg_quality: int) -> str:
+    return base64.b64encode(_serialize_image(image, image_format, jpeg_quality)).decode("ascii")
 
 
 def _draw_grid(image, region_x: int, region_y: int, rows: int, cols: int, include_labels: bool):
@@ -335,6 +339,7 @@ def screen(
     include_labels: bool = True,
     image_format: Literal["png", "jpeg"] = "png",
     jpeg_quality: int = 85,
+    asImage: bool = False,
     _: None = Depends(_auth),
 ):
     req = ScreenRequest(
@@ -354,6 +359,11 @@ def screen(
         out_img, grid_meta = _draw_grid(base_img, mon["x"], mon["y"], req.grid_rows, req.grid_cols, req.include_labels)
         meta.update(grid_meta)
 
+    if asImage:
+        image_bytes = _serialize_image(out_img, req.image_format, req.jpeg_quality)
+        media_type = "image/jpeg" if req.image_format == "jpeg" else "image/png"
+        return Response(content=image_bytes, media_type=media_type)
+
     encoded = _encode_image(out_img, req.image_format, req.jpeg_quality)
     return {
         "ok": True,
@@ -370,7 +380,7 @@ def screen(
 
 
 @app.post("/zoom")
-def zoom(req: ZoomRequest, _: None = Depends(_auth)):
+def zoom(req: ZoomRequest, asImage: bool = False, _: None = Depends(_auth)):
     base_img, mon = _capture_screen()
 
     cx = req.center_x - mon["x"]
@@ -404,6 +414,11 @@ def zoom(req: ZoomRequest, _: None = Depends(_auth)):
         out_img, grid_meta = _draw_grid(crop, region_x, region_y, req.grid_rows, req.grid_cols, req.include_labels)
         meta.update(grid_meta)
 
+    if asImage:
+        image_bytes = _serialize_image(out_img, req.image_format, req.jpeg_quality)
+        media_type = "image/jpeg" if req.image_format == "jpeg" else "image/png"
+        return Response(content=image_bytes, media_type=media_type)
+
     encoded = _encode_image(out_img, req.image_format, req.jpeg_quality)
 
     return {