diff --git a/README.md b/README.md
index 201a8b6..a0e6e20 100644
--- a/README.md
+++ b/README.md
@@ -9,12 +9,19 @@ Pulls MyAnimeList and TVDB ID associations from https://raw.githubusercontent.co
 ### GET /anime
 See https://docs.api.jikan.moe/#tag/anime/operation/getAnimeSearch for parameters.
 
+Additional parameters supported:
+- `allow_duplicates`: skips de-duplication of results
+
 Example request:
 ```bash
 # fetches the top 10 most popular currently airing tv anime
 curl "http://localhost:3333/anime?type=tv&status=airing&order_by=popularity&sort=asc&limit=10"
 ```
 
+## Environment
+One configuration environment variable is supported:
+- `ALWAYS_SKIP_IDS`: Comma-separated list of MyAnimeList IDs to always skip. These do not count towards the return limit.
+
 ## Docker Compose
 ```yaml
 services:
@@ -23,6 +30,21 @@ services:
     container_name: sonarr-mal-importer
     ports:
       - 3333:3333
+    environment:
+      - ALWAYS_SKIP_IDS=12345,67890 # Comma-separated
     restart: unless-stopped
 
-```
\ No newline at end of file
+```
+
+# TODO
+- [x] Add de-duplication and a query param to disable it
+- [x] Add perma-skip by MALId option in environment variable
+- [ ] Only do "a.k.a." when logging if the anime has different romanized and english titles
+
+# Albums that fueled development
+| Album                   | Artist                       |
+|-------------------------|------------------------------|
+| ZOO!!                   | Necry Talkie (ネクライトーキー) |
+| FREAK                   | Necry Talkie (ネクライトーキー) |
+| Expert In A Dying Field | The Beths                    |
+| Vivid                   | ADOY                         |
\ No newline at end of file
diff --git a/main.go b/main.go
index b7f1d6d..71a38df 100644
--- a/main.go
+++ b/main.go
@@ -5,7 +5,10 @@ import (
 	"io"
 	"log"
 	"net/http"
+	"net/url"
+	"os"
 	"reflect"
+	"slices"
 	"strconv"
 	"strings"
 	"sync"
@@ -37,23 +40,28 @@ func (m *ConcurrentMap) Get(i int) int {
 var lastBuiltAnimeIdList time.Time
 
 func main() {
-	log.Println("sonarr-mal-importer v0.0.5")
+	log.Println("sonarr-mal-importer v0.1.0")
 	log.Println("Building Anime ID Associations...")
 	var malToTvdb = new(ConcurrentMap)
 	buildIdMap(malToTvdb)
-	http.HandleFunc("/anime", handleAnimeSearch(malToTvdb))
+	permaSkipStr := os.Getenv("ALWAYS_SKIP_IDS")
+	permaSkipIds := strings.Split(permaSkipStr, ",")
+	if permaSkipStr != "" {
+		log.Printf("Always skipping: %v\n", permaSkipIds)
+	}
+	http.HandleFunc("/anime", handleAnimeSearch(malToTvdb, permaSkipIds))
 	log.Println("Listening on :3333")
 	log.Fatal(http.ListenAndServe(":3333", nil))
 }
 
-func handleAnimeSearch(malToTvdb *ConcurrentMap) func(w http.ResponseWriter, r *http.Request) {
+func handleAnimeSearch(malToTvdb *ConcurrentMap, permaSkipIds []string) func(w http.ResponseWriter, r *http.Request) {
 	return func(w http.ResponseWriter, r *http.Request) {
 		log.Printf("%s %s?%s", r.Method, r.URL.Path, r.URL.RawQuery)
 		if time.Since(lastBuiltAnimeIdList) > 24*time.Hour {
 			log.Println("Anime ID association table expired, building new table...")
 			buildIdMap(malToTvdb)
 		}
-		search, err := getAnimeSearch(malToTvdb, r)
+		search, err := getAnimeSearch(malToTvdb, permaSkipIds, r)
 		if err != nil {
 			w.WriteHeader(500)
 		} else {
@@ -62,7 +70,7 @@ func handleAnimeSearch(malToTvdb *ConcurrentMap) func(w http.ResponseWriter, r *
 	}
 }
 
-func getAnimeSearch(malToTvdb *ConcurrentMap, r *http.Request) (string, error) {
+func getAnimeSearch(malToTvdb *ConcurrentMap, permaSkipIds []string, r *http.Request) (string, error) {
 	q := r.URL.Query()
 
 	limit, err := strconv.Atoi(q.Get("limit"))
@@ -70,6 +78,8 @@ func getAnimeSearch(malToTvdb *ConcurrentMap, r *http.Request) (string, error) {
 		limit = 9999 // limit not specified or invalid
 	}
 
+	skipDedup := parseBoolParam(q, "allow_duplicates")
+
 	// for some reason Jikan responds with 400 Bad Request for any limit >25
 	// so instead, we just limit when mapping the data and remove the limit from the Jikan request
 	q.Del("limit")
@@ -78,6 +88,7 @@ func getAnimeSearch(malToTvdb *ConcurrentMap, r *http.Request) (string, error) {
 	page := 0
 	resp := []ResponseItem{}
 	count := 0
+	usedIds := make(map[int]bool, 0)
 	for hasNextPage {
 		page++
 		q.Set("page", strconv.Itoa(page))
@@ -93,6 +104,14 @@ func getAnimeSearch(malToTvdb *ConcurrentMap, r *http.Request) (string, error) {
 				log.Printf("MyAnimeList ID %d (%s a.k.a. %s) has no associated TVDB ID, skipping...\n", item.MalId, item.Title, item.TitleEnglish)
 				continue
 			}
+			if usedIds[item.MalId] && !skipDedup {
+				log.Printf("MyAnimeList ID %d (%s a.k.a. %s) is a duplicate, skipping...\n", item.MalId, item.Title, item.TitleEnglish)
+				continue
+			}
+			if slices.Contains(permaSkipIds, strconv.Itoa(item.MalId)) {
+				log.Printf("MyAnimeList ID %d (%s a.k.a. %s) is set to always skip, skipping...\n", item.MalId, item.Title, item.TitleEnglish)
+				continue
+			}
 			count++
 			if count > limit {
 				break
@@ -103,6 +122,7 @@ func getAnimeSearch(malToTvdb *ConcurrentMap, r *http.Request) (string, error) {
 					item.MalId,
 					malToTvdb.Get(item.MalId),
 				})
+			usedIds[item.MalId] = true
 		}
 		hasNextPage = result.Pagination.HasNextPage
 		if count > limit {
@@ -165,3 +185,18 @@ func buildIdMap(idMap *ConcurrentMap) {
 	}
 	lastBuiltAnimeIdList = time.Now()
 }
+
+// parses the boolean param "name" from url.Values "values"
+func parseBoolParam(values url.Values, name string) bool {
+	param := values.Get(name)
+
+	if param != "" {
+		val, err := strconv.ParseBool(param)
+		if err == nil {
+			return val
+		}
+	} else if _, exists := values[name]; exists {
+		return true
+	}
+	return false
+}