diff --git a/.gitignore b/.gitignore
index f97aab7..b566f0e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -24,4 +24,5 @@ go.work
 __debug_bin
 
 argo_workflows/*
-*.xml
\ No newline at end of file
+*.xml
+*.txt
\ No newline at end of file
diff --git a/go.mod b/go.mod
index 1263fa1..d0ff358 100644
--- a/go.mod
+++ b/go.mod
@@ -7,6 +7,7 @@ require (
 	github.com/beego/beego v1.12.12
 	github.com/beego/beego/v2 v2.2.2
 	github.com/goraz/onion v0.1.3
+	github.com/nats-io/nats.go v1.9.1
 	github.com/nwtgck/go-fakelish v0.1.3
 	github.com/rs/zerolog v1.33.0
 	github.com/tidwall/gjson v1.17.1
@@ -24,10 +25,13 @@ require (
 	github.com/golang/snappy v0.0.2 // indirect
 	github.com/hashicorp/golang-lru v0.5.4 // indirect
 	github.com/jmespath/go-jmespath v0.4.0 // indirect
-	github.com/klauspost/compress v1.11.7 // indirect
+	github.com/klauspost/compress v1.17.2 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.19 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
+	github.com/nats-io/jwt v0.3.2 // indirect
+	github.com/nats-io/nkeys v0.1.3 // indirect
+	github.com/nats-io/nuid v1.0.1 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/prometheus/client_golang v1.19.0 // indirect
 	github.com/prometheus/client_model v0.5.0 // indirect
diff --git a/go.sum b/go.sum
index 2696d91..1223f39 100644
--- a/go.sum
+++ b/go.sum
@@ -247,8 +247,9 @@ github.com/kisielk/errcheck v1.1.0/go.mod h1:EZBBE59ingxPouuu3KfxchcWSUPOHkagtvW
 github.com/kisielk/errcheck v1.2.0/go.mod h1:/BMXB+zMLi60iA8Vv6Ksmxu/1UDYcXs4uQLJ+jE2L00=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/klauspost/compress v1.9.5/go.mod h1:RyIbtBH6LamlWaDj8nUwkbUhJ87Yi3uG0guNDohfE1A=
-github.com/klauspost/compress v1.11.7 h1:0hzRabrMN4tSTvMfnL3SCv1ZGeAP23ynzodBgaHeMeg=
 github.com/klauspost/compress v1.11.7/go.mod h1:aoV0uJVorq1K+umq18yTdKaF57EivdYsUV+/s2qKfXs=
+github.com/klauspost/compress v1.17.2 h1:RlWWUY/Dr4fL8qk9YG7DTZ7PDgME2V4csBXA8L/ixi4=
+github.com/klauspost/compress v1.17.2/go.mod h1:ntbaceVETuRiXiv4DpjP66DpAtAGkEQskQzEyD//IeE=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/konsorten/go-windows-terminal-sequences v1.0.2/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/konsorten/go-windows-terminal-sequences v1.0.3/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
@@ -302,11 +303,16 @@ github.com/montanaflynn/stats v0.0.0-20171201202039-1bf9dbcd8cbe/go.mod h1:wL8QJ
 github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
 github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
 github.com/nats-io/jwt v0.3.0/go.mod h1:fRYCDE99xlTsqUzISS1Bi75UBJ6ljOJQOAAu5VglpSg=
+github.com/nats-io/jwt v0.3.2 h1:+RB5hMpXUUA2dfxuhBTEkMOrYmM+gKIZYS1KjSostMI=
 github.com/nats-io/jwt v0.3.2/go.mod h1:/euKqTS1ZD+zzjYrY7pseZrTtWQSjujC7xjPc8wL6eU=
+github.com/nats-io/nats-server/v2 v2.1.2 h1:i2Ly0B+1+rzNZHHWtD4ZwKi+OU5l+uQo1iDHZ2PmiIc=
 github.com/nats-io/nats-server/v2 v2.1.2/go.mod h1:Afk+wRZqkMQs/p45uXdrVLuab3gwv3Z8C4HTBu8GD/k=
+github.com/nats-io/nats.go v1.9.1 h1:ik3HbLhZ0YABLto7iX80pZLPw/6dx3T+++MZJwLnMrQ=
 github.com/nats-io/nats.go v1.9.1/go.mod h1:ZjDU1L/7fJ09jvUSRVBR2e7+RnLiiIQyqyzEE/Zbp4w=
 github.com/nats-io/nkeys v0.1.0/go.mod h1:xpnFELMwJABBLVhffcfd1MZx6VsNRFpEugbxziKVo7w=
+github.com/nats-io/nkeys v0.1.3 h1:6JrEfig+HzTH85yxzhSVbjHRJv9cn0p6n3IngIcM5/k=
 github.com/nats-io/nkeys v0.1.3/go.mod h1:xpnFELMwJABBLVhffcfd1MZx6VsNRFpEugbxziKVo7w=
+github.com/nats-io/nuid v1.0.1 h1:5iA8DT8V7q8WK2EScv2padNa/rTESc1KdnPw4TC2paw=
 github.com/nats-io/nuid v1.0.1/go.mod h1:19wcPz3Ph3q0Jbyiqsd0kePYG7A95tJPxeL+1OSON2c=
 github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e/go.mod h1:zD1mROLANZcx1PVRCS0qkT7pwLkGfwJo4zjcN/Tysno=
 github.com/nwtgck/go-fakelish v0.1.3 h1:bA8/xa9hQmzppexIhBvdmztcd/PJ4SPuAUTBdMKZ8G4=
diff --git a/graph.go b/graph.go
index 1847bb4..8a7689f 100644
--- a/graph.go
+++ b/graph.go
@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"maps"
 	"net/url"
+	"oc-scheduler/daemons"
 
 	"cloud.o-forge.io/core/oc-catalog/models"
 
@@ -20,7 +21,7 @@ type Graph struct {
 	Datacenters []models.DatacenterModel
 	Storages    []models.StorageModel
 	Links		map[string]models.Link 
-	ws          HttpQuery
+	ws          daemons.HttpQuery
 }
 
 // Create a dictionnaries with each  existing workflow from a workspace, associated to the JSON representation of its content
diff --git a/models/schedule.go b/models/schedule.go
new file mode 100644
index 0000000..8b4467f
--- /dev/null
+++ b/models/schedule.go
@@ -0,0 +1,70 @@
+package models
+
+import (
+	"fmt"
+	"oc-scheduler/logger"
+	"sync"
+	"time"
+)
+
+// Is duration really important ?
+
+type Booking struct {
+	Start		time.Time
+	Stop		time.Time
+	Duration	uint
+	Workflow	string
+}
+
+type ScheduledBooking struct {
+	Bookings	[]Booking
+	Mu			sync.Mutex
+}
+
+func (s Booking) Equals(other Booking) bool {
+    return s.Workflow == other.Workflow && s.Start == other.Start && s.Stop == other.Stop
+}
+
+func (sb *ScheduledBooking) AddSchedule(new_booking Booking){
+	if(!sb.scheduleAlreadyExists(new_booking)){
+		sb.Bookings = append(sb.Bookings,new_booking) 
+		logger.Logger.Info().Msg("Updated list schedules : \n " + sb.String())
+	} else {
+		// Debug condition : delete once this feature is ready to be implemented
+		logger.Logger.Debug().Msg("Workflow received not added, current schedule contains")
+		for _, booking := range(sb.Bookings){
+			logger.Logger.Debug().Msg(booking.String())
+		}
+	}
+}
+
+func (sb *ScheduledBooking) GetListNames()(list_names []string ){
+	for _, schedule := range(sb.Bookings){
+		list_names = append(list_names, schedule.Workflow)
+	}
+
+	return
+}
+
+func (sb *ScheduledBooking) scheduleAlreadyExists(new_booking Booking) bool {
+	for _, booking :=  range(sb.Bookings){
+		if booking.Equals(new_booking){
+			return true
+		}
+	}
+	return false
+}
+
+func (b *Booking) String() string {
+	return fmt.Sprintf("{Workflow : %s ,  startDate : %s ,  stopDate :  %s }", b.Workflow, b.Start.Format(time.RFC3339), b.Stop.Format(time.RFC3339))
+	
+}
+
+func (sb *ScheduledBooking) String() string {
+	var str string
+	for _, booking := range(sb.Bookings){
+		str += fmt.Sprintf("%s\n", booking.String())
+	}
+
+	return str
+}