diff --git a/main.cfg.dist b/main.cfg.dist
index cfe04f4..8137962 100644
--- a/main.cfg.dist
+++ b/main.cfg.dist
@@ -6,3 +6,8 @@ FEEDS = [
 ]
 
 MAX_ENTRIES = 10
+
+AT_API_URL = "https://at.hackerspace.pl/api"
+
+OPEN_DAY_WEEKDAY = 4 # Thursday (according to %w of http://docs.python.org/2/library/time.html#time.strftime)
+OPEN_DAY_BEGIN_HOUR = 18
diff --git a/main.py b/main.py
index f9b6d8c..72ee6b2 100644
--- a/main.py
+++ b/main.py
@@ -4,8 +4,9 @@ import feedparser
 import requests
 import string
 import random
-from flask import Flask, render_template, request, flash, session, abort
-from time import mktime
+import json
+from flask import Flask, render_template, request, flash, session, abort, jsonify
+from time import mktime, strftime
 from datetime import datetime
 
 app = Flask('main')
@@ -81,6 +82,76 @@ def about_en():
     if request.method == "POST":
         parse_subscribe_requests()
     return render_template('about_en.html', entries=pull_feed_entries())
+
+@app.route('/spaceapi')
+def spaceapi():
+    space_open = None
+    people_now_present = {'value': 0}
+    open_day = False
+
+    try:
+        at_response = requests.get(app.config['AT_API_URL'], headers={
+            'User-Agent': 'HSWAWSpaceAPI/1.0 +https://hackerspace.pl/spaceapi'
+            })
+        at_object = json.loads(at_response.content)
+
+        space_open = len(at_object['users']) > 0
+        people_now_present['value'] = len(at_object['users'])
+        people_now_present['names'] = list(user['login'] for user in at_object['users'])
+
+        open_day = space_open and int(strftime("%w")) == app.config['OPEN_DAY_WEEKDAY'] \
+                              and int(strftime("%H")) >= app.config['OPEN_DAY_BEGIN_HOUR']
+    except:
+        import traceback
+        traceback.print_exc()
+
+    result = {
+            "api": "0.13",
+            "space": "Warsaw Hackerspace",
+            "logo": "https://static.hackerspace.pl/img/syrenka-black.png",
+            "url": "https://hackerspace.pl",
+            "location": {
+                "lat": 52.2462275,
+                "lon": 21.003067,
+                "address": "ul. Długa 44/50, 00-241 Warszawa, Poland",
+            },
+            "state": {
+                "open": space_open,
+                "message": "open for public" if open_day else "members only",
+                # @TODO: customized *space* logo
+                "icon": {
+                    "open": "https://static.hackerspace.pl/img/status-open-small.png",
+                    "closed": "https://static.hackerspace.pl/img/status-closed-small.png",
+                }
+            },
+            "contact": {
+                "irc": "irc://chat.freenode.net/#hackerspace-pl",
+                "twitter": "@hackerspacepl",
+                "facebook": "hackerspacepl",
+                "ml": "waw@lists.hackerspace.pl",
+            },
+            "issue_report_channels": [
+                "ml"
+            ],
+            "projects": [
+                "https://wiki.hackerspace.pl/projects",
+            ],
+            "feeds": {
+                "blog": {"type": "atom", "url": "https://blog.hackerspace.pl/feed/atom/"},
+                "calendar": {"type": "ical", "url": "https://www.google.com/calendar/ical/hackerspacewaw%40gmail.com/public/basic.ics"},
+                "wiki": {"type": "rss", "url": "https://wiki.hackerspace.pl/feed.php"},
+            },
+            "sensors": {
+                "people_now_present": [people_now_present]
+            },
+        }
+
+    # SpaceAPI version <0.13 compliance
+    result['open'] = result['state']['open']
+    result['icon'] = result['state']['icon']
+
+    return jsonify(result)
+
 @app.before_request
 def csrf_protect():
     if request.method == "POST":