diff --git a/esi_sso.go b/esi_sso.go
index 660df59..073661b 100644
--- a/esi_sso.go
+++ b/esi_sso.go
@@ -50,6 +50,9 @@ type ESISSO struct {
 	server       *http.Server
 
 	db *gorm.DB
+
+	nameCacheOnce sync.Once
+	nameToID      map[string]int64 // lowercased name -> id
 }
 
 type SolarSystem struct {
@@ -556,172 +559,58 @@ func parseTokenCharacter(jwt string) (name string, id int64) {
 	return
 }
 
-// ResolveSystemIDByName ... DB-first then ESI fallbacks
-func (s *ESISSO) ResolveSystemIDByName(ctx context.Context, name string) (int64, error) {
-	name = strings.TrimSpace(name)
-	if name == "" {
-		return 0, errors.New("empty system name")
-	}
-	if s.db != nil {
-		var sys SolarSystem
-		if err := s.db.Where("solarSystemName = ?", name).First(&sys).Error; err == nil && sys.SolarSystemID != 0 {
-			fmt.Printf("DB: resolved %q -> %d\n", name, sys.SolarSystemID)
-			return sys.SolarSystemID, nil
-		}
-	}
-	// Fallbacks (universe/ids -> strict search -> non-strict + names)
-	type idsReq struct{ Names []string `json:"names"` }
-	body, _ := json.Marshal(idsReq{Names: []string{name}})
-	idsURL := esiBase + "/v3/universe/ids/?datasource=tranquility"
-	fmt.Printf("ESI: resolve system id via universe/ids for name=%q\n", name)
-	req, err := http.NewRequestWithContext(ctx, http.MethodPost, idsURL, strings.NewReader(string(body)))
-	if err == nil {
-		req.Header.Set("Content-Type", "application/json")
-		req.Header.Set("Accept", "application/json")
-		resp, errDo := http.DefaultClient.Do(req)
-		if errDo == nil {
-			defer resp.Body.Close()
-			if resp.StatusCode == http.StatusOK {
-				var idsResp struct{ Systems []struct{ ID int64 `json:"id"`; Name string `json:"name"` } `json:"systems"` }
-				if err := json.NewDecoder(resp.Body).Decode(&idsResp); err == nil {
-					if len(idsResp.Systems) > 0 {
-						fmt.Printf("ESI: universe/ids hit: %s -> %d\n", idsResp.Systems[0].Name, idsResp.Systems[0].ID)
-						return idsResp.Systems[0].ID, nil
-					}
-				}
+// ensureNameCache loads a lowercase name->id map from the local DB once
+func (s *ESISSO) ensureNameCache() error {
+	var err error
+	s.nameCacheOnce.Do(func() {
+		cache := make(map[string]int64, 50000)
+		if s.db != nil {
+			var rows []SolarSystem
+			// Only select required columns
+			if e := s.db.Select("solarSystemID, solarSystemName").Find(&rows).Error; e != nil {
+				err = e
+				return
+			}
+			for _, r := range rows {
+				cache[strings.ToLower(r.SolarSystemName)] = r.SolarSystemID
 			}
 		}
-	}
-	q := url.Values{}
-	q.Set("categories", "solar_system")
-	q.Set("search", name)
-	q.Set("strict", "true")
-	searchURL := esiBase + "/v3/search/?" + q.Encode()
-	fmt.Printf("ESI: strict search for %q\n", name)
-	req2, err := http.NewRequestWithContext(ctx, http.MethodGet, searchURL, nil)
-	if err != nil {
-		return 0, err
-	}
-	req2.Header.Set("Accept", "application/json")
-	resp2, err := http.DefaultClient.Do(req2)
-	if err == nil {
-		defer resp2.Body.Close()
-		if resp2.StatusCode == http.StatusOK {
-			var payload struct{ SolarSystem []int64 `json:"solar_system"` }
-			if err := json.NewDecoder(resp2.Body).Decode(&payload); err == nil && len(payload.SolarSystem) > 0 {
-				fmt.Printf("ESI: strict search hit: %d\n", payload.SolarSystem[0])
-				return payload.SolarSystem[0], nil
-			}
-		}
-	}
-	q.Set("strict", "false")
-	searchURL2 := esiBase + "/v3/search/?" + q.Encode()
-	fmt.Printf("ESI: non-strict search for %q\n", name)
-	req3, err := http.NewRequestWithContext(ctx, http.MethodGet, searchURL2, nil)
-	if err != nil {
-		return 0, err
-	}
-	req3.Header.Set("Accept", "application/json")
-	resp3, err := http.DefaultClient.Do(req3)
-	if err != nil {
-		return 0, err
-	}
-	defer resp3.Body.Close()
-	if resp3.StatusCode != http.StatusOK {
-		b, _ := io.ReadAll(resp3.Body)
-		return 0, fmt.Errorf("search failed: %s: %s", resp3.Status, string(b))
-	}
-	var payload struct{ SolarSystem []int64 `json:"solar_system"` }
-	if err := json.NewDecoder(resp3.Body).Decode(&payload); err != nil || len(payload.SolarSystem) == 0 {
-		return 0, fmt.Errorf("system not found: %s", name)
-	}
-	if len(payload.SolarSystem) == 1 {
-		fmt.Printf("ESI: non-strict search single hit: %d\n", payload.SolarSystem[0])
-		return payload.SolarSystem[0], nil
-	}
-	ids := payload.SolarSystem
-	namesURL := esiBase + "/v3/universe/names/?datasource=tranquility"
-	idsBody, _ := json.Marshal(ids)
-	req4, err := http.NewRequestWithContext(ctx, http.MethodPost, namesURL, strings.NewReader(string(idsBody)))
-	if err != nil {
-		return 0, err
-	}
-	req4.Header.Set("Content-Type", "application/json")
-	req4.Header.Set("Accept", "application/json")
-	resp4, err := http.DefaultClient.Do(req4)
-	if err != nil {
-		return 0, err
-	}
-	defer resp4.Body.Close()
-	if resp4.StatusCode != http.StatusOK {
-		b, _ := io.ReadAll(resp4.Body)
-		return 0, fmt.Errorf("names lookup failed: %s: %s", resp4.Status, string(b))
-	}
-	var namesResp []struct{ Category string `json:"category"`; ID int64 `json:"id"`; Name string `json:"name"` }
-	if err := json.NewDecoder(resp4.Body).Decode(&namesResp); err != nil {
-		return 0, err
-	}
-	lower := strings.ToLower(name)
-	for _, n := range namesResp {
-		if n.Category == "solar_system" && strings.ToLower(n.Name) == lower {
-			fmt.Printf("ESI: names resolved exact: %s -> %d\n", n.Name, n.ID)
-			return n.ID, nil
-		}
-	}
-	fmt.Printf("ESI: names resolved fallback: returning %d for %q\n", namesResp[0].ID, name)
-	return namesResp[0].ID, nil
+		s.nameToID = cache
+	})
+	return err
 }
 
-// ResolveSystemIDsByNames returns IDs in the same order as names. Missing entries error.
+// ResolveSystemIDByName resolves using ONLY the local DB cache (case-insensitive)
+func (s *ESISSO) ResolveSystemIDByName(ctx context.Context, name string) (int64, error) {
+	if err := s.ensureNameCache(); err != nil {
+		return 0, err
+	}
+	key := strings.ToLower(strings.TrimSpace(name))
+	if id, ok := s.nameToID[key]; ok {
+		return id, nil
+	}
+	return 0, fmt.Errorf("system not found in local DB: %s", name)
+}
+
+// ResolveSystemIDsByNames returns IDs in the same order as names using ONLY the local DB cache
 func (s *ESISSO) ResolveSystemIDsByNames(ctx context.Context, names []string) ([]int64, error) {
-	ordered := make([]int64, len(names))
-	if len(names) == 0 {
-		return ordered, nil
+	if err := s.ensureNameCache(); err != nil {
+		return nil, err
 	}
-	// DB first
-	nameLower := make([]string, len(names))
-	for i, n := range names { nameLower[i] = strings.TrimSpace(n) }
-	found := map[string]int64{}
-	if s.db != nil {
-		var rows []SolarSystem
-		if err := s.db.Where("solarSystemName IN ?", nameLower).Find(&rows).Error; err == nil {
-			for _, r := range rows {
-				found[r.SolarSystemName] = r.SolarSystemID
-			}
-		}
-	}
-	// Collect missing for ESI batch
+	out := make([]int64, len(names))
 	missing := []string{}
-	for _, n := range nameLower {
-		if _, ok := found[n]; !ok {
+	for i, n := range names {
+		key := strings.ToLower(strings.TrimSpace(n))
+		if id, ok := s.nameToID[key]; ok {
+			out[i] = id
+		} else {
 			missing = append(missing, n)
 		}
 	}
 	if len(missing) > 0 {
-		idsURL := esiBase + "/v3/universe/ids/?datasource=tranquility"
-		body, _ := json.Marshal(struct{ Names []string `json:"names"` }{Names: missing})
-		req, err := http.NewRequestWithContext(ctx, http.MethodPost, idsURL, strings.NewReader(string(body)))
-		if err != nil { return nil, err }
-		req.Header.Set("Content-Type", "application/json")
-		req.Header.Set("Accept", "application/json")
-		resp, err := http.DefaultClient.Do(req)
-		if err != nil { return nil, err }
-		defer resp.Body.Close()
-		if resp.StatusCode != http.StatusOK {
-			b, _ := io.ReadAll(resp.Body)
-			return nil, fmt.Errorf("universe/ids failed: %s: %s", resp.Status, string(b))
-		}
-		var idsResp struct{ Systems []struct{ ID int64 `json:"id"`; Name string `json:"name"` } `json:"systems"` }
-		if err := json.NewDecoder(resp.Body).Decode(&idsResp); err != nil { return nil, err }
-		for _, it := range idsResp.Systems { found[it.Name] = it.ID }
+		return nil, fmt.Errorf("systems not found in local DB: %s", strings.Join(missing, ", "))
 	}
-	// Build ordered list
-	for i, n := range nameLower {
-		id, ok := found[n]
-		if !ok { return nil, fmt.Errorf("system not found: %s", n) }
-		ordered[i] = id
-	}
-	return ordered, nil
+	return out, nil
 }
 
 // PostRouteForAll clears route and posts vias then destination last