diff --git a/config-template.json b/config-template.json
index 31cb500..8b2b039 100644
--- a/config-template.json
+++ b/config-template.json
@@ -1,111 +1,112 @@
 {
-  "credentials": {
-    "club-assistant": {
-      "username": "club-assistant",
-      "password": "clubmiau"
-    },
-    "dooris-hauptraum": {
-      "username": "dooris-hauptraum",
-      "password": "doorimiau"
-    }
-  },
-  "dynamic": {
-    "sensors": {
-      "temperature": [
-        {
-          "sensor_data": {
-            "unit": "°C",
-            "location": "Hauptraum",
-            "name": "Kueche",
-            "description": "Sensor im Ofen"
-          },
-          "allowed_credentials": [
-            "club-assistant"
-          ]
-        },
-        {
-          "sensor_data": {
-            "unit": "°C",
-            "location": "Hauptraum",
-            "description": "Sensor im Hauptraum"
-          },
-          "allowed_credentials": [
-            "club-assistant"
-          ]
-        }
-      ],
-      "humidity": [
-        {
-          "sensor_data": {
-            "unit": "%",
-            "location": "Hauptraum",
-            "name": "Kueche",
-            "description": "Sensor im Wasserhahn"
-          },
-          "allowed_credentials": [
-            "club-assistant"
-          ]
-        }
-      ],
-      "beverage_supply": [
-        {
-          "sensor_data": {
-            "unit": "btl"
-          },
-          "allowed_credentials": [
-            "club-assistant"
-          ]
-        }
-      ]
-    },
-    "state": {
-      "open": {
-        "allowed_credentials": [
-          "dooris-hauptraum"
-        ]
-      }
-    }
-  },
-  "response": {
-    "api_compatibility": [
-      "14"
-    ],
-    "space": "CCCHH",
-    "logo": "https://hamburg.ccc.de/images/logo.svg",
-    "ext_ccc": "erfa",
-    "url": "https://hamburg.ccc.de/",
-    "location": {
-      "address": "Zeiseweg 9, 22765 Hamburg, Germany",
-      "lon": 9.94444,
-      "lat": 53.5584
-    },
-    "contact": {
-      "phone": "+49 40 23830150",
-      "irc": "ircs://irc.hackint.org:6697/#ccchh",
-      "mastodon": "@ccchh@chaos.social",
-      "email": "mail@hamburg.ccc.de",
-      "ml": "talk@hamburg.ccc.de",
-      "matrix": "#ccchh:hamburg.ccc.de"
-    },
-    "feeds": {
-      "blog": {
-        "type": "application/rss+xml",
-        "url": "https://hamburg.ccc.de/feed.xml"
-      },
-      "calendar": {
-        "type": "ical",
-        "url": "webcal://cloud.hamburg.ccc.de/remote.php/dav/public-calendars/QJAdExziSnNJEz5g/?export"
-      }
-    },
-    "links": [
-      {
-        "name": "Wiki",
-        "url": "https://wiki.hamburg.ccc.de"
-      },
-      {
-        "name": "Git (Forgejo)",
-        "url": "https://git.hamburg.ccc.de"
-      }
-    ]
-  }
+	"credentials": {
+		"club-assistant":   {
+			"username": "club-assistant",
+			"password": "clubmiau"
+		},
+		"dooris-hauptraum": {
+			"username": "dooris-hauptraum",
+			"password": "doorimiau"
+		}
+	},
+	"dynamic":     {
+		"sensors": {
+			"temperature":     [
+				{
+					"sensor_data":         {
+						"unit":        "°C",
+						"location":    "Hauptraum",
+						"name":        "Kueche",
+						"description": "Sensor im Ofen"
+					},
+					"allowed_credentials": [
+						"club-assistant"
+					]
+				},
+				{
+					"sensor_data":         {
+						"unit":        "°C",
+						"location":    "Hauptraum",
+						"description": "Sensor im Hauptraum"
+					},
+					"allowed_credentials": [
+						"club-assistant"
+					]
+				}
+			],
+			"humidity":        [
+				{
+					"sensor_data":         {
+						"unit":        "%",
+						"location":    "Hauptraum",
+						"name":        "Kueche",
+						"description": "Sensor im Wasserhahn"
+					},
+					"allowed_credentials": [
+						"club-assistant"
+					]
+				}
+			],
+			"beverage_supply": [
+				{
+					"sensor_data":         {
+						"unit": "btl"
+					},
+					"allowed_credentials": [
+						"club-assistant"
+					]
+				}
+			]
+		},
+		"state":   {
+			"open": {
+				"allowed_credentials": [
+					"dooris-hauptraum"
+				]
+			}
+		}
+	},
+	"response":    {
+		"api_compatibility": [
+			"14",
+			"15"
+		],
+		"space":             "CCCHH",
+		"logo":              "https://hamburg.ccc.de/images/logo.svg",
+		"ext_ccc":           "erfa",
+		"url":               "https://hamburg.ccc.de/",
+		"location":          {
+			"address": "Zeiseweg 9, 22765 Hamburg, Germany",
+			"lon":     9.94444,
+			"lat":     53.5584
+		},
+		"contact":           {
+			"phone":    "+49 40 23830150",
+			"irc":      "ircs://irc.hackint.org:6697/#ccchh",
+			"mastodon": "@ccchh@chaos.social",
+			"email":    "mail@hamburg.ccc.de",
+			"ml":       "talk@hamburg.ccc.de",
+			"matrix":   "#ccchh:hamburg.ccc.de"
+		},
+		"feeds":             {
+			"blog":     {
+				"type": "application/rss+xml",
+				"url":  "https://hamburg.ccc.de/feed.xml"
+			},
+			"calendar": {
+				"type": "ical",
+				"url":  "webcal://cloud.hamburg.ccc.de/remote.php/dav/public-calendars/QJAdExziSnNJEz5g/?export"
+			}
+		},
+		"links":             [
+			{
+				"name": "Wiki",
+				"url":  "https://wiki.hamburg.ccc.de"
+			},
+			{
+				"name": "Git (Forgejo)",
+				"url":  "https://git.hamburg.ccc.de"
+			}
+		]
+	}
 }
diff --git a/config/config.go b/config/config.go
index 444fd45..b57d615 100644
--- a/config/config.go
+++ b/config/config.go
@@ -59,7 +59,7 @@ func getConfigPaths() (paths pathsT) {
 
 	// If paths is still empty we are missing something
 	if len(paths) == 0 {
-		log.Fatalln("Error: Neither env: ", envConfigPath, "nor cli flag was specified, unable to start without config.")
+		log.Fatalln("Error: Neither env:", envConfigPath, "nor cli flag was specified, unable to start without config.")
 	}
 	return
 }
diff --git a/config/types.go b/config/types.go
index 4a305ce..9361579 100644
--- a/config/types.go
+++ b/config/types.go
@@ -34,5 +34,5 @@ type SpaceapidConfig struct {
 	// The dynamic part of the spaceapi JSON
 	Dynamic DynamicStateConfig `json:"dynamic"`
 	// The static part of the spaceapi JSON
-	Response types.SpaceAPIResponseV14 `json:"response"`
+	Response types.SpaceAPIResponse `json:"response"`
 }
diff --git a/handlers/root.go b/handlers/root.go
index 47091d5..88cdc55 100644
--- a/handlers/root.go
+++ b/handlers/root.go
@@ -8,7 +8,7 @@ import (
 	"git.hamburg.ccc.de/ccchh/spaceapid/types"
 )
 
-func Root(resp *types.SpaceAPIResponseV14) func(http.ResponseWriter, *http.Request) {
+func Root(resp *types.SpaceAPIResponse) func(http.ResponseWriter, *http.Request) {
 	return func(w http.ResponseWriter, r *http.Request) {
 		// Check if GET method
 		if r.Method != http.MethodGet {
diff --git a/handlers/state.go b/handlers/state.go
index d1ab9d9..d4962c1 100644
--- a/handlers/state.go
+++ b/handlers/state.go
@@ -12,7 +12,7 @@ import (
 
 func StateOpen(
 	authDB config.HTTPBACredentials, validCredentials []config.HTTPBACredentialID,
-	resp *types.SpaceState,
+	resp *types.SpaceAPIState,
 ) func(http.ResponseWriter, *http.Request) {
 	return func(w http.ResponseWriter, r *http.Request) {
 		body, err := updateEndpointValidator(authDB, validCredentials, w, r)
@@ -37,7 +37,7 @@ func StateOpen(
 
 func StateMessagePUT(
 	authDB config.HTTPBACredentials, validCredentials []config.HTTPBACredentialID,
-	resp *types.SpaceState,
+	resp *types.SpaceAPIState,
 ) func(http.ResponseWriter, *http.Request) {
 	return func(w http.ResponseWriter, r *http.Request) {
 		body, err := updateEndpointValidator(authDB, validCredentials, w, r)
@@ -54,7 +54,7 @@ func StateMessagePUT(
 
 func StateMessageDELETE(
 	authDB config.HTTPBACredentials, validCredentials []config.HTTPBACredentialID,
-	resp *types.SpaceState,
+	resp *types.SpaceAPIState,
 ) func(http.ResponseWriter, *http.Request) {
 	return func(w http.ResponseWriter, r *http.Request) {
 		_, err := updateEndpointValidator(authDB, validCredentials, w, r)
diff --git a/handlers/util.go b/handlers/util.go
index 27c2d9f..d7e6dd5 100644
--- a/handlers/util.go
+++ b/handlers/util.go
@@ -18,7 +18,7 @@ func updateEndpointValidator(
 	// Check BasicAuth credentials
 	username, password, ok := r.BasicAuth()
 	if !ok || !util.CheckCredentials(authDB, validCredentials, username, password) {
-		w.Header()["WWW-Authenticate"] = []string{"Basic realm=\"spaceapid\""}
+		w.Header().Set("WWW-Authenticate", "Basic realm=\"spaceapid\"")
 		http.Error(w, "", http.StatusUnauthorized)
 		return []byte{}, errors.New(fmt.Sprintf("Unauthorized request from %s Username: %s Password: %s", r.RemoteAddr, username, password))
 	}
diff --git a/main.go b/main.go
index 35b564d..b67c43f 100644
--- a/main.go
+++ b/main.go
@@ -43,7 +43,7 @@ func main() {
 	// Register signal handler
 	sc := make(chan os.Signal, 1)
 	signal.Notify(sc, syscall.SIGINT, syscall.SIGTERM)
-	go func(resp *types.SpaceAPIResponseV14) {
+	go func(resp *types.SpaceAPIResponse) {
 		<-sc
 		log.Println("Saving state and shutting down...")
 		persistence.SaveCurrentState(*resp)
diff --git a/persistence/persistentState.go b/persistence/persistentState.go
index 74fbdb2..87c3121 100644
--- a/persistence/persistentState.go
+++ b/persistence/persistentState.go
@@ -16,11 +16,11 @@ const (
 
 // MergeOldState merges a given SpaceAPIResponse with the state saved at the time of last program exit and then deletes
 // the file containing the old state.
-func MergeOldState(response *types.SpaceAPIResponseV14) {
+func MergeOldState(response *types.SpaceAPIResponse) {
 	var (
 		err            error
 		oldState       []byte
-		persistedState types.PersistentStateV14
+		persistedState types.PersistentSpaceState
 	)
 
 	log.Println("Merging old state from", persistentStatePath, "...")
@@ -48,7 +48,7 @@ func MergeOldState(response *types.SpaceAPIResponseV14) {
 	}
 
 	// Merge state
-	response.State = persistedState.State
+	response.State.FromPersistentSpaceState(persistedState)
 
 	// Merge sensors
 	for key, environmentSensors := range persistedState.Sensors {
@@ -72,7 +72,7 @@ removeOld:
 	}
 }
 
-func SaveCurrentState(response types.SpaceAPIResponseV14) {
+func SaveCurrentState(response types.SpaceAPIResponse) {
 	// Create state directory if not present
 	err := os.MkdirAll(persistentStateDir, 0750)
 	if err != nil {
@@ -87,7 +87,7 @@ func SaveCurrentState(response types.SpaceAPIResponseV14) {
 	defer file.Close()
 
 	// Create persistent state
-	persistentStateV14 := types.PersistentStateV14{
+	persistentStateV14 := types.PersistentSpaceState{
 		State: struct {
 			Open       bool   `json:"open"`
 			LastChange int64  `json:"lastchange"`
diff --git a/types/v14.go b/types/v14.go
deleted file mode 100644
index 3763fe4..0000000
--- a/types/v14.go
+++ /dev/null
@@ -1,69 +0,0 @@
-package types
-
-type SpaceAPIResponseV14 struct {
-	APICompatibility []string `json:"api_compatibility"`
-	Space            string   `json:"space"`
-	Logo             string   `json:"logo"`
-	ExtCCC           string   `json:"ext_ccc"`
-	URL              string   `json:"url"`
-	Location         struct {
-		Address string  `json:"address"`
-		Lat     float64 `json:"lat"`
-		Lon     float64 `json:"lon"`
-	} `json:"location"`
-	State   SpaceState `json:"state"`
-	Contact struct {
-		Phone    string `json:"phone"`
-		IRC      string `json:"irc"`
-		Mastodon string `json:"mastodon"`
-		Email    string `json:"email"`
-		ML       string `json:"ml"`
-		Matrix   string `json:"matrix"`
-	} `json:"contact"`
-	Sensors map[string][]EnvironmentSensor `json:"sensors"`
-	Feeds   struct {
-		Blog struct {
-			Type string `json:"type"`
-			URL  string `json:"url"`
-		} `json:"blog"`
-		Calendar struct {
-			Type string `json:"type"`
-			URL  string `json:"url"`
-		} `json:"calendar"`
-	} `json:"feeds"`
-	Links []struct {
-		Name string `json:"name"`
-		URL  string `json:"url"`
-	} `json:"links"`
-}
-
-type SpaceState struct {
-	Open       bool   `json:"open"`
-	LastChange int64  `json:"lastchange"`
-	Message    string `json:"message,omitempty"`
-}
-
-type EnvironmentSensor struct {
-	Value       float64 `json:"value"`
-	Unit        string  `json:"unit"`
-	Location    string  `json:"location,omitempty"`
-	Name        string  `json:"name,omitempty"`
-	Description string  `json:"description,omitempty"`
-	LastChange  int64   `json:"lastchange,omitempty"`
-}
-
-type PersistentStateV14 struct {
-	State struct {
-		Open       bool   `json:"open"`
-		LastChange int64  `json:"lastchange"`
-		Message    string `json:"message,omitempty"`
-	} `json:"state"`
-	Sensors map[string][]PersistentEnvironmentSensor `json:"sensors,omitempty"`
-}
-
-type PersistentEnvironmentSensor struct {
-	Value      float64 `json:"value"`
-	Location   string  `json:"location,omitempty"`
-	Name       string  `json:"name,omitempty"`
-	LastChange int64   `json:"lastchange"`
-}
diff --git a/types/v15.go b/types/v15.go
new file mode 100644
index 0000000..0362fab
--- /dev/null
+++ b/types/v15.go
@@ -0,0 +1,159 @@
+package types
+
+type SpaceAPIResponse struct {
+	APICompatibility []string `json:"api_compatibility"` // REQUIRED
+	Space            string   `json:"space"`             // REQUIRED
+	Logo             string   `json:"logo"`              // REQUIRED
+	URL              string   `json:"url"`               // REQUIRED
+
+	// Minimum number of properties: 1
+	Location struct {
+		Address     string  `json:"address,omitzero"`
+		Lat         float64 `json:"lat,omitzero"`
+		Lon         float64 `json:"lon,omitzero"`
+		Timezone    string  `json:"timezone,omitzero"`
+		CountryCode string  `json:"country_code,omitzero"`
+		Hint        string  `json:"hint,omitzero"`
+		// Minimum number of items: 1
+		Areas []SpaceAPILocationAreas `json:"areas,omitempty"`
+	} `json:"location,omitzero"`
+
+	SpaceFed struct {
+		SpaceNet  bool `json:"spacenet,omitzero"`
+		SpaceSAML bool `json:"spacesaml,omitzero"`
+	} `json:"spacefed,omitzero"`
+
+	Cam []string `json:"cam,omitempty"`
+
+	State SpaceAPIState `json:"state,omitzero"`
+
+	Events []SpaceAPIEvents `json:"events,omitempty"`
+
+	Contact struct {
+		Phone string `json:"phone,omitzero"`
+		Sip   string `json:"sip,omitzero"`
+		// keymasters
+		Keymasters []struct {
+			Name     string `json:"name,omitzero"`
+			IRCNick  string `json:"irc_nick,omitzero"`
+			Phone    string `json:"phone,omitzero"`
+			Email    string `json:"email,omitzero"`
+			Twitter  string `json:"twitter,omitzero"`
+			Xmpp     string `json:"xmpp,omitzero"`
+			Mastodon string `json:"mastodon,omitzero"`
+			Matrix   string `json:"matrix,omitzero"`
+		} `json:"keymasters,omitempty"`
+		IRC        string `json:"irc,omitzero"`
+		Twitter    string `json:"twitter,omitzero"`
+		Mastodon   string `json:"mastodon,omitzero"`
+		Facebook   string `json:"facebook,omitzero"`
+		Identica   string `json:"identica,omitzero"`
+		Foursquare string `json:"foursquare,omitzero"`
+		Email      string `json:"email,omitzero"`
+		ML         string `json:"ml,omitzero"`
+		XMPP       string `json:"xmpp,omitzero"`
+		IssueMail  string `json:"issue_mail,omitzero"`
+		Gopher     string `json:"gopher,omitzero"`
+		Matrix     string `json:"matrix,omitzero"`
+		Mumble     string `json:"mumble,omitzero"`
+	} `json:"contact"`
+
+	Sensors map[string][]EnvironmentSensor `json:"sensors,omitempty"`
+
+	Feeds struct {
+		Blog struct {
+			Type string `json:"type,omitzero"`
+			URL  string `json:"url"` // REQUIRED
+		} `json:"blog,omitzero"`
+		Wiki struct {
+			Type string `json:"type,omitzero"`
+			URL  string `json:"url"` // REQUIRED
+		} `json:"wiki,omitzero"`
+		Calendar struct {
+			Type string `json:"type,omitzero"`
+			URL  string `json:"url"` // REQUIRED
+		} `json:"calendar,omitzero"`
+		Flickr struct {
+			Type string `json:"type,omitzero"`
+			URL  string `json:"url"` // REQUIRED
+		} `json:"flickr,omitzero"`
+	} `json:"feeds,omitzero"`
+
+	Projects []string `json:"projects,omitempty"`
+
+	Links []struct {
+		Name        string `json:"name"` // REQUIRED
+		URL         string `json:"url"`  // REQUIRED
+		Description string `json:"description,omitzero"`
+	} `json:"links,omitempty"`
+
+	MembershipPlans []struct {
+		Name            string `json:"name"`             // REQUIRED
+		Value           int64  `json:"value"`            // REQUIRED
+		Currency        string `json:"currency"`         // REQUIRED
+		BillingInterval string `json:"billing_interval"` // REQUIRED
+		Description     string `json:"description,omitzero"`
+	} `json:"membership_plans,omitempty"`
+
+	LinkedSpaces []struct {
+		Endpoint string `json:"endpoint,omitzero"`
+		Website  string `json:"website,omitzero"`
+	} `json:"linked_spaces,omitempty"`
+
+	ExtCCC string `json:"ext_ccc,omitzero"`
+}
+
+type SpaceAPILocationAreas struct {
+	Name         string  `json:"name,omitzero"`
+	Description  string  `json:"description,omitzero"`
+	SquareMeters float64 `json:"square_meters"` // REQUIRED
+}
+
+type SpaceAPIState struct {
+	Open          bool   `json:"open,omitempty"`
+	LastChange    int64  `json:"lastchange,omitempty"`
+	TriggerPerson string `json:"trigger_person,omitempty"`
+	Message       string `json:"message,omitempty"`
+	Icon          struct {
+		Open   string `json:"open,omitempty"`   // REQUIRED
+		Closed string `json:"closed,omitempty"` // REQUIRED
+	} `json:"icon,omitzero"`
+}
+
+func (s *SpaceAPIState) FromPersistentSpaceState(state PersistentSpaceState) {
+	s.Open = state.State.Open
+	s.LastChange = state.State.LastChange
+	s.Message = state.State.Message
+}
+
+type SpaceAPIEvents struct {
+	Name      string `json:"name"`      // REQUIRED
+	Type      string `json:"type"`      // REQUIRED
+	Timestamp int64  `json:"timestamp"` // REQUIRED
+	Extra     string `json:"extra,omitzero"`
+}
+
+type EnvironmentSensor struct {
+	Value       float64 `json:"value"`
+	Unit        string  `json:"unit"`
+	Location    string  `json:"location,omitempty"`
+	Name        string  `json:"name,omitempty"`
+	Description string  `json:"description,omitempty"`
+	LastChange  int64   `json:"lastchange,omitempty"`
+}
+
+type PersistentSpaceState struct {
+	State struct {
+		Open       bool   `json:"open"`
+		LastChange int64  `json:"lastchange"`
+		Message    string `json:"message,omitempty"`
+	} `json:"state"`
+	Sensors map[string][]PersistentEnvironmentSensor `json:"sensors,omitempty"`
+}
+
+type PersistentEnvironmentSensor struct {
+	Value      float64 `json:"value"`
+	Location   string  `json:"location,omitempty"`
+	Name       string  `json:"name,omitempty"`
+	LastChange int64   `json:"lastchange"`
+}