diff --git a/metricdata/archive.go b/metricdata/archive.go
index 176e922..d4c9ab5 100644
--- a/metricdata/archive.go
+++ b/metricdata/archive.go
@@ -2,13 +2,18 @@ package metricdata
 
 import (
 	"bufio"
+	"context"
 	"encoding/json"
+	"errors"
 	"fmt"
+	"math"
 	"os"
+	"path"
 	"path/filepath"
 	"strconv"
 	"strings"
 
+	"github.com/ClusterCockpit/cc-jobarchive/config"
 	"github.com/ClusterCockpit/cc-jobarchive/graph/model"
 	"github.com/ClusterCockpit/cc-jobarchive/schema"
 )
@@ -23,8 +28,13 @@ func getPath(job *model.Job, file string) (string, error) {
 		return "", err
 	}
 
-	lvl1, lvl2 := id/1000, id%1000
-	return filepath.Join(JobArchivePath, job.ClusterID, fmt.Sprintf("%d", lvl1), fmt.Sprintf("%03d", lvl2), file), nil
+	lvl1, lvl2 := fmt.Sprintf("%d", id/1000), fmt.Sprintf("%03d", id%1000)
+	legacyPath := filepath.Join(JobArchivePath, job.ClusterID, lvl1, lvl2, file)
+	if _, err := os.Stat(legacyPath); errors.Is(err, os.ErrNotExist) {
+		return filepath.Join(JobArchivePath, job.ClusterID, lvl1, lvl2, strconv.FormatInt(job.StartTime.Unix(), 10), file), nil
+	}
+
+	return legacyPath, nil
 }
 
 // Assuming job is completed/archived, return the jobs metric data.
@@ -123,3 +133,99 @@ func loadAveragesFromArchive(job *model.Job, metrics []string, data [][]schema.F
 
 	return nil
 }
+
+// Writes a running job to the job-archive
+func ArchiveJob(job *model.Job, ctx context.Context) error {
+	if job.State != model.JobStateRunning {
+		return errors.New("cannot archive job that is not running")
+	}
+
+	allMetrics := make([]string, 0)
+	metricConfigs := config.GetClusterConfig(job.ClusterID).MetricConfig
+	for _, mc := range metricConfigs {
+		allMetrics = append(allMetrics, mc.Name)
+	}
+	jobData, err := LoadData(job, allMetrics, ctx)
+	if err != nil {
+		return err
+	}
+
+	tags := []struct {
+		Name string `json:"name"`
+		Type string `json:"type"`
+	}{}
+	for _, tag := range job.Tags {
+		tags = append(tags, struct {
+			Name string `json:"name"`
+			Type string `json:"type"`
+		}{
+			Name: tag.TagName,
+			Type: tag.TagType,
+		})
+	}
+
+	metaData := &schema.JobMeta{
+		JobId:      job.JobID,
+		UserId:     job.UserID,
+		ClusterId:  job.ClusterID,
+		NumNodes:   job.NumNodes,
+		JobState:   job.State.String(),
+		StartTime:  job.StartTime.Unix(),
+		Duration:   int64(job.Duration),
+		Nodes:      job.Nodes,
+		Tags:       tags,
+		Statistics: make(map[string]*schema.JobMetaStatistics),
+	}
+
+	for metric, data := range jobData {
+		avg, min, max := 0.0, math.MaxFloat32, -math.MaxFloat32
+		for _, nodedata := range data.Series {
+			avg += nodedata.Statistics.Avg
+			min = math.Min(min, nodedata.Statistics.Min)
+			max = math.Max(max, nodedata.Statistics.Max)
+		}
+
+		metaData.Statistics[metric] = &schema.JobMetaStatistics{
+			Unit: config.GetMetricConfig(job.ClusterID, metric).Unit,
+			Avg:  avg / float64(job.NumNodes),
+			Min:  min,
+			Max:  max,
+		}
+	}
+
+	dirPath, err := getPath(job, "")
+	if err != nil {
+		return err
+	}
+
+	if err := os.MkdirAll(dirPath, 0777); err != nil {
+		return err
+	}
+
+	f, err := os.Create(path.Join(dirPath, "meta.json"))
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+	writer := bufio.NewWriter(f)
+	if err := json.NewEncoder(writer).Encode(metaData); err != nil {
+		return err
+	}
+	if err := writer.Flush(); err != nil {
+		return err
+	}
+
+	f, err = os.Create(path.Join(dirPath, "data.json"))
+	if err != nil {
+		return err
+	}
+	writer = bufio.NewWriter(f)
+	if err := json.NewEncoder(writer).Encode(metaData); err != nil {
+		return err
+	}
+	if err := writer.Flush(); err != nil {
+		return err
+	}
+
+	return f.Close()
+}
diff --git a/rest-api.go b/rest-api.go
new file mode 100644
index 0000000..b9caff6
--- /dev/null
+++ b/rest-api.go
@@ -0,0 +1,115 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"log"
+	"net/http"
+	"strings"
+
+	"github.com/ClusterCockpit/cc-jobarchive/config"
+	"github.com/ClusterCockpit/cc-jobarchive/graph"
+	"github.com/ClusterCockpit/cc-jobarchive/graph/model"
+	"github.com/ClusterCockpit/cc-jobarchive/metricdata"
+	sq "github.com/Masterminds/squirrel"
+)
+
+type StartJobRequestBody struct {
+	JobId     string   `json:"job_id"`
+	UserId    string   `json:"user_id"`
+	ProjectId string   `json:"project_id"`
+	ClusterId string   `json:"cluster_id"`
+	StartTime int64    `json:"start_time"`
+	Nodes     []string `json:"nodes"`
+	Metadata  string   `json:"metadata"`
+}
+
+type StartJobResponeBody struct {
+	DBID int64 `json:"db_id"`
+}
+
+type StopJobRequestBody struct {
+	DBID      *int64 `json:"db_id"`
+	JobId     string `json:"job_id"`
+	ClusterId string `json:"cluster_id"`
+	StartTime int64  `json:"start_time"`
+
+	StopTime int64 `json:"stop_time"`
+}
+
+func startJob(rw http.ResponseWriter, r *http.Request) {
+	req := StartJobRequestBody{}
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		http.Error(rw, err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	if config.GetClusterConfig(req.ClusterId) == nil {
+		http.Error(rw, fmt.Sprintf("cluster '%s' does not exist", req.ClusterId), http.StatusBadRequest)
+		return
+	}
+
+	res, err := db.Exec(
+		`INSERT INTO job (job_id, user_id, cluster_id, start_time, duration, job_state, num_nodes, node_list, metadata) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?);`,
+		req.JobId, req.UserId, req.ClusterId, req.StartTime, 0, model.JobStateRunning, len(req.Nodes), strings.Join(req.Nodes, ","), req.Metadata)
+	if err != nil {
+		http.Error(rw, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	id, err := res.LastInsertId()
+	if err != nil {
+		http.Error(rw, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	log.Printf("New job started (db-id=%d)\n", id)
+	rw.Header().Add("Content-Type", "application/json")
+	rw.WriteHeader(http.StatusOK)
+	json.NewEncoder(rw).Encode(StartJobResponeBody{
+		DBID: id,
+	})
+}
+
+func stopJob(rw http.ResponseWriter, r *http.Request) {
+	req := StopJobRequestBody{}
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		http.Error(rw, err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	var err error
+	var job *model.Job
+	if req.DBID != nil {
+		job, err = graph.ScanJob(sq.Select(graph.JobTableCols...).From("job").Where("job.id = ?", req.DBID).RunWith(db).QueryRow())
+	} else {
+		job, err = graph.ScanJob(sq.Select(graph.JobTableCols...).From("job").
+			Where("job.job_id = ?", req.JobId).
+			Where("job.cluster_id = ?", req.ClusterId).
+			Where("job.start_time = ?", req.StartTime).
+			RunWith(db).QueryRow())
+	}
+	if err != nil {
+		http.Error(rw, err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	if job == nil || job.StartTime.Unix() >= req.StopTime || job.State != model.JobStateRunning {
+		http.Error(rw, "stop_time must be larger than start_time and only running jobs can be stopped", http.StatusBadRequest)
+		return
+	}
+
+	job.Duration = int(job.StartTime.Unix() - req.StopTime)
+	if err := metricdata.ArchiveJob(job, r.Context()); err != nil {
+		http.Error(rw, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	if _, err := db.Exec(`UPDATE job SET job.duration = ?, job.job_state = ? WHERE job.id = ?;`,
+		job.Duration, model.JobStateCompleted, job.ID); err != nil {
+		http.Error(rw, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	rw.WriteHeader(http.StatusOK)
+}
diff --git a/schema/metrics.go b/schema/metrics.go
index c4e3b18..7939596 100644
--- a/schema/metrics.go
+++ b/schema/metrics.go
@@ -52,6 +52,13 @@ type MetricSeries struct {
 	Data       []Float           `json:"data"`
 }
 
+type JobMetaStatistics struct {
+	Unit string  `json:"unit"`
+	Avg  float64 `json:"avg"`
+	Min  float64 `json:"min"`
+	Max  float64 `json:"max"`
+}
+
 // Format of `meta.json` files.
 type JobMeta struct {
 	JobId     string   `json:"job_id"`
@@ -67,10 +74,5 @@ type JobMeta struct {
 		Name string `json:"name"`
 		Type string `json:"type"`
 	} `json:"tags"`
-	Statistics map[string]struct {
-		Unit string  `json:"unit"`
-		Avg  float64 `json:"avg"`
-		Min  float64 `json:"min"`
-		Max  float64 `json:"max"`
-	} `json:"statistics"`
+	Statistics map[string]*JobMetaStatistics `json:"statistics"`
 }
diff --git a/server.go b/server.go
index f21871b..1859918 100644
--- a/server.go
+++ b/server.go
@@ -22,6 +22,8 @@ import (
 	_ "github.com/mattn/go-sqlite3"
 )
 
+var db *sqlx.DB
+
 func main() {
 	var reinitDB bool
 	var port, staticFiles, jobDBFile string
@@ -32,7 +34,8 @@ func main() {
 	flag.BoolVar(&reinitDB, "init-db", false, "Initialize new SQLite Database")
 	flag.Parse()
 
-	db, err := sqlx.Open("sqlite3", jobDBFile)
+	var err error
+	db, err = sqlx.Open("sqlite3", jobDBFile)
 	if err != nil {
 		log.Fatal(err)
 	}
@@ -47,7 +50,7 @@ func main() {
 		}
 	}
 
-	clusters, err := loadClusters()
+	config.Clusters, err = loadClusters()
 	if err != nil {
 		log.Fatal(err)
 	}
@@ -56,11 +59,15 @@ func main() {
 	loggedRouter := handlers.LoggingHandler(os.Stdout, r)
 
 	srv := handler.NewDefaultServer(generated.NewExecutableSchema(generated.Config{
-		Resolvers: &graph.Resolver{DB: db, ClusterConfigs: clusters}}))
+		Resolvers: &graph.Resolver{DB: db}}))
 	r.HandleFunc("/graphql-playground", playground.Handler("GraphQL playground", "/query"))
 	r.Handle("/query", srv)
+
 	r.HandleFunc("/config.json", config.ServeConfig).Methods("GET")
 
+	r.HandleFunc("/api/start-job", startJob).Methods("POST")
+	r.HandleFunc("/api/stop-job", stopJob).Methods("POST")
+
 	if len(staticFiles) != 0 {
 		r.PathPrefix("/").Handler(http.FileServer(http.Dir(staticFiles)))
 	}