diff --git a/src/Jackett.Common/Definitions/redbits-api.yml b/src/Jackett.Common/Definitions/redbits-api.yml
new file mode 100644
index 000000000..f9af54553
--- /dev/null
+++ b/src/Jackett.Common/Definitions/redbits-api.yml
@@ -0,0 +1,160 @@
+---
+id: redbits-api
+name: RedBits (API)
+description: "RedBits is a SPANISH site for classic content"
+language: es-ES
+type: private
+encoding: UTF-8
+links:
+  - https://red-bits.com/
+
+caps:
+  categorymappings:
+    - {id: 1, cat: Movies, desc: "Películas"}
+    - {id: 2, cat: TV, desc: "Series"}
+    - {id: 6, cat: TV/Documentary, desc: "Documentales"}
+    - {id: 7, cat: TV/Sport, desc: "Deportes"}
+    - {id: 8, cat: Movies, desc: "Hagbard"}
+    - {id: 9, cat: Movies, desc: "Studio Ghibli"}
+
+  modes:
+    search: [q]
+    tv-search: [q, season, ep, imdbid, tvdbid]
+    movie-search: [q, imdbid, tmdbid]
+
+settings:
+  - name: apikey
+    type: text
+    label: APIKey
+  - name: info_key
+    type: info
+    label: About your API key
+    default: "Find or Generate a new API Token by accessing your <a href=\"https://red-bits.com/\" target =_blank>RedBits</a> account <i>My Security</i> page and clicking on the <b>API Token</b> tab."
+  - name: freeleech
+    type: checkbox
+    label: Search freeleech only
+    default: false
+  - name: sort
+    type: select
+    label: Sort requested from site
+    default: created_at
+    options:
+      created_at: created
+      seeders: seeders
+      size: size
+      name: title
+  - name: type
+    type: select
+    label: Order requested from site
+    default: desc
+    options:
+      desc: desc
+      asc: asc
+
+login:
+  path: /api/torrents
+  method: get
+  inputs:
+    api_token: "{{ .Config.apikey }}"
+  error:
+    - selector: a[href*="/login"]
+      message:
+        text: "The API key was not accepted by {{ .Config.sitelink }}."
+
+search:
+  paths:
+    # https://hdinnovations.github.io/UNIT3D-Community-Edition-Docs/api_endpoints.html
+    # https://github.com/HDInnovations/UNIT3D-Community-Edition/blob/master/app/Http/Controllers/API/TorrentController.php
+    - path: "/api/torrents/filter?api_token={{ .Config.apikey }}&name={{ if .Query.IMDBID }}{{ else }}{{ .Keywords }}{{ end }}{{ if .Query.TMDBID }}&tmdbId={{ .Query.TMDBID }}{{ else }}{{ end }}{{ if .Query.IMDBIDShort }}&imdbId={{ .Query.IMDBIDShort }}{{ else }}{{ end }}{{ if  .Query.TVDBID }}&tvdbId={{ .Query.TVDBID }}{{ else }}{{ end }}&sortField={{ .Config.sort }}&sortDirection={{ .Config.type }}&perPage=100&page=1{{ range .Categories }}&categories[]={{.}}{{end}}{{ if .Config.freeleech }}&free=1{{ else }}{{ end }}"
+      response:
+        type: json
+
+  rows:
+    selector: data
+    attribute: attributes
+    count:
+      selector: meta.total
+
+  fields:
+    categorydesc:
+      selector: category
+    title_vose:
+      selector: name:contains(VOSE)
+      optional: true
+      filters:
+        - name: re_replace
+          args: ["(?i)bdfull", "BluRay"] # BDfull  -> BluRay
+        - name: re_replace
+          args: ["(?i)RedBits", ""] # Delete RedBits
+        - name: append
+          args: " English" # Add english to fix Sonarr/Radarr language
+        - name: re_replace
+          args: ["\\[|\\]", " "]
+        - name: re_replace
+          args: ["  ", " "]
+        - name: re_replace
+          args: ["(?i)T(\\d{1,2})\\b", "S$1"]
+    title_notvose:
+      selector: name:not(:contains(VOSE))
+      optional: true
+      filters:
+        - name: re_replace
+          args: ["(?i)bdfull", "BluRay"] # BDfull  -> BluRay
+        - name: re_replace
+          args: ["(?i)RedBits", ""] # Delete RedBits
+        - name: append
+          args: " Spanish" # Add spanish to fix Sonarr/Radarr language
+        - name: re_replace
+          args: ["\\[|\\]", " "]
+        - name: re_replace
+          args: ["  ", " "]
+        - name: re_replace
+          args: ["(?i)T(\\d{1,2})\\b", "S$1"]
+    title:
+      text: "{{ if .Result.title_vose }}{{ .Result.title_vose }}{{ else }}{{ .Result.title_notvose }}{{ end }}"
+    details:
+      selector: details_link
+    download:
+      selector: download_link
+    poster:
+      selector: poster
+      filters:
+        - name: replace
+          args: ["https://via.placeholder.com/90x135", ""]
+    imdbid:
+      selector: imdb_id
+    tmdbid:
+      selector: tmdb_id
+    tvdbid:
+      selector: tvdb_id
+    files:
+      selector: num_file
+    seeders:
+      selector: seeders
+    leechers:
+      selector: leechers
+    grabs:
+      selector: times_completed
+    date:
+      # 2021-10-18T00:34:50.000000Z"
+      selector: created_at
+    size:
+      selector: size
+    downloadvolumefactor:
+      # api returns 0=false, 1=true
+      selector: freeleech
+      case:
+        0: 1 # not free
+        1: 0 # freeleech
+    uploadvolumefactor:
+      # api returns 0=false, 1=true
+      selector: double_upload
+      case:
+        0: 1 # normal
+        1: 2 # double
+    minimumratio:
+      text: 0.4
+    minimumseedtime:
+      # 4 days (as seconds = 4 x 24 x 60 x 60)
+      text: 345600
+# json UNIT3D 5.3.0
diff --git a/src/Jackett.Common/Definitions/redbits.yml b/src/Jackett.Common/Definitions/redbits.yml
deleted file mode 100644
index 3c566cda8..000000000
--- a/src/Jackett.Common/Definitions/redbits.yml
+++ /dev/null
@@ -1,227 +0,0 @@
----
-id: redbits
-name: RedBits
-description: "RedBits is a SPANISH site for classic content"
-language: es-ES
-type: private
-encoding: UTF-8
-links:
-  - https://red-bits.com/
-
-caps:
-  categorymappings:
-    - {id: 1, cat: Movies, desc: "Películas"}
-    - {id: 2, cat: TV, desc: "Series"}
-    - {id: 6, cat: TV/Documentary, desc: "Documentales"}
-    - {id: 7, cat: TV/Sport, desc: "Deportes"}
-    - {id: 8, cat: Movies, desc: "Hagbard"}
-    - {id: 9, cat: Movies, desc: "Studio Ghibli"}
-
-  modes:
-    search: [q]
-    tv-search: [q, season, ep, imdbid, tvdbid]
-    movie-search: [q, imdbid, tmdbid]
-
-settings:
-  - name: username
-    type: text
-    label: Username
-  - name: password
-    type: password
-    label: Password
-  - name: freeleech
-    type: checkbox
-    label: Search freeleech only
-    default: false
-  - name: sort
-    type: select
-    label: Sort requested from site
-    default: created_at
-    options:
-      created_at: created
-      seeders: seeders
-      size: size
-      name: title
-  - name: type
-    type: select
-    label: Order requested from site
-    default: desc
-    options:
-      desc: desc
-      asc: asc
-
-login:
-  path: login
-  method: form
-  form: form[action$="/login"]
-  inputs:
-    username: "{{ .Config.username }}"
-    password: "{{ .Config.password }}"
-    remember: on
-  selectorinputs:
-    _token:
-      selector: input[name="_token"]
-      attribute: value
-  error:
-    - selector: div#ERROR_COPY
-#    test:
-#      path: /
-#      selector: a[href$="/logout"]
-
-search:
-  paths:
-    - path: torrents/filter
-  keywordsfilters:
-    - name: re_replace
-      args: ["(?i)\\bS0*(\\d+)\\b", "T$1"]
-  inputs:
-    $raw: "{{ range .Categories }}categories[]={{.}}&{{end}}"
-    search: "{{ if .Query.IMDBID }}{{ else }}{{ .Keywords }}{{ end }}" # for dashboard imdbid search
-    description: ""
-    keywords: ""
-    uploader: ""
-    imdb: "{{ .Query.IMDBIDShort }}"
-    tvdb: "{{ .Query.TVDBID }}"
-    tmdb: "{{ .Query.TMDBID }}"
-    mal: ""
-    igdb: ""
-    start_year: ""
-    end_year: ""
-    sorting: "{{ .Config.sort }}"
-    direction: "{{ .Config.type }}"
-    qty: 100
-    page: 0
-    view: list
-    freeleech: "{{ if .Config.freeleech }}1{{ else }}{{ end }}"
-
-  rows:
-    selector: table > tbody > tr
-
-  fields:
-    category:
-      selector: a[href*="/categories/"]
-      attribute: href
-      filters:
-        - name: regexp
-          args: "/categories/(\\d+)"
-    title_vose:
-      selector: a.view-torrent:contains("VOSE")
-      optional: true
-      filters:
-        - name: re_replace
-          args: ["(?i)bdfull", "BluRay"] # BDfull  -> BluRay
-        - name: re_replace
-          args: ["(?i)RedBits", ""] # Delete RedBits
-        - name: append
-          args: " English" # Add english to fix Sonarr/Radarr language
-        - name: re_replace
-          args: ["\\[|\\]", " "]
-        - name: re_replace
-          args: ["  ", " "]
-        - name: re_replace
-          args: ["(?i)T(\\d{1,2})\\b", "S$1"]
-    title_notvose:
-      selector: a.view-torrent:not(:contains("VOSE"))
-      optional: true
-      filters:
-        - name: re_replace
-          args: ["(?i)bdfull", "BluRay"] # BDfull  -> BluRay
-        - name: re_replace
-          args: ["(?i)RedBits", ""] # Delete RedBits
-        - name: append
-          args: " Spanish" # Add spanish to fix Sonarr/Radarr language
-        - name: re_replace
-          args: ["\\[|\\]", " "]
-        - name: re_replace
-          args: ["  ", " "]
-        - name: re_replace
-          args: ["(?i)T(\\d{1,2})\\b", "S$1"]
-    title:
-      text: "{{ if .Result.title_vose }}{{ .Result.title_vose }}{{ else }}{{ .Result.title_notvose }}{{ end }}"
-    download:
-      selector: a[href*="/download/"]
-      attribute: href
-    details:
-      selector: a.view-torrent
-      attribute: href
-    poster:
-      selector: div.torrent-poster img
-      attribute: src
-      filters:
-        - name: replace
-          args: ["&w=52&h=80", "&w=180&h=270"] # for display on dashboard
-        - name: replace
-          args: ["https://images.weserv.nl/?url=https://via.placeholder.com/52x80&w=180&h=270", ""]
-    size:
-      selector: td:nth-last-child(4)
-    seeders:
-      selector: td:nth-last-child(3)
-    leechers:
-      selector: td:nth-last-child(2)
-    grabs:
-      selector: td:nth-last-child(1)
-    imdbid:
-      selector: a[href*="imdb.com/title/tt"]
-      attribute: href
-    tmdbid:
-      selector: a[href*="themoviedb.org/movie/"]
-      attribute: href
-    date:
-      selector: time
-      filters:
-        # translations for Turkish|Estonian|Danish|Italian|Polish|Norwegian|Portuguese|Czech|Russian|Romanian|Spanish|French|German|Bulgarian|Dutch|Chinese|Japanese|Swedish
-        - name: re_replace
-          args: ["(?i)(önce|tagasi|geleden|fa|temu|siden|há|atrás|nazpět|назад|acum|în urmă|hace|il y a|vor|преди|前|sedan)", " ago"]
-        - name: re_replace
-          args: ["(?i)(saniye|sekundit|sekunder|secondi|sekund|segundos|sekundami|секунд|secunde|secondes|Sekunden|секунди|seconden|秒前)", "seconds"]
-        - name: re_replace
-          args: ["(?i)(minutit|minutter|minuti|minuty|minutos|минуты|минут|Minuten|минути|minuten|minuter)", "minutes"]
-        - name: re_replace
-          args: ["(?i)(dakika|minut|minuto|minuta|minutt|минута|Minute|minuut|分钟|分)", " minute"]
-        - name: re_replace
-          args: ["(?i)(tundi|timer|ore|godziny|horas|hodiny|hoden|часа|часов|ore|heures|Stunden|timmar)", "hours"]
-        - name: re_replace
-          args: ["(?i)(saat|tund|time|ora|godzina|hora|hodina|час|oră|heure|Stunde|uur|小时|時間|timme)", " hour"]
-        - name: re_replace
-          args: ["(?i)(päeva|dage|giorni|dni|dias|dny|дня|дней|zile|días|jours|Tagen|дни|dagen|dagar)", "days"]
-        - name: re_replace
-          args: ["(?i)(gün|päev|dag|giorno|dzień|dia|den|день|zi|día|jour|Tag|ден|天|日)", " day"]
-        - name: re_replace
-          args: ["(?i)(nädalat|uger|settimane|tygodnie|uker|semanas|týdny|недели|недель|săptămâni|semaines|Wochen|седмици|weken|veckor)", "weeks"]
-        - name: re_replace
-          args: ["(?i)(hafta|nädal|uge|settimana|tydzień|uke|semana|týden|неделю|săptămână|semaine|Woche|седмица|周|週間|vecka)", " week"]
-        - name: re_replace
-          args: ["(?i) (ay)", "month"]
-        - name: re_replace
-          args: ["(?i)(kuud|måneder|mesi|miesiące|meses|měsíce|месяца|месяцев|luni|meses|mois|Monaten|месеца|maanden|månader)", "months"]
-        - name: re_replace
-          args: ["(?i)(kuu|måned|mese|miesiąc|mês|měsíc|месяц|lună|mes|Monat|месец|maand|个月|ヶ月|månad)", " month"]
-        - name: re_replace
-          args: ["(?i)(aastat|anni|lata|anos|roky|года|ani|años|ans|Jahren|години)", " years"]
-        - name: re_replace
-          args: ["(?i)(yil|aasta|år|anno|rok|ano|год|año|Jahr|година|jaar|年)", " year"]
-        - name: re_replace
-          args: ["(?i) (an)", "year"]
-        - name: re_replace
-          args: ["(?i)(För |und)", ""] # Misc removals
-        - name: timeago
-    downloadvolumefactor:
-      case:
-        i[class*="fa-id-badge text-orange"]: 0 # 24 Hour FreeLeech From BON Store
-        i[class*="fa-trophy text-purple"]: 0 # Special FreeLeech For Certain User Groups
-        i[class*="fa-star text-bold"]: 0 # Freeleech From Token
-        i[class*="fa-coins text-bold"]: 0 # Freeleech From Token
-        i[class*="fa-globe text-blue"]: 0 # Global Freeleech
-        i[class*="fa-star text-gold"]: 0 # Freeleech
-        i[class*="fa-certificate text-pink"]: 0 # Featured Torrent
-        "*": 1
-    uploadvolumefactor:
-      case:
-        i[class*="fa-gem text-green"]: 2 # Single Torrent Double Upload
-        i[class*="fa-globe text-green"]: 2 # Global Double Upload
-        i[class*="fa-certificate text-pink"]: 2 # Featured Torrent
-        "*": 1
-    minimumseedtime:
-      # 4 days (as seconds = 4 x 24 x 60 x 60)
-      text: 345600
-# UNIT3D 5.1.0
diff --git a/src/Jackett.Updater/Program.cs b/src/Jackett.Updater/Program.cs
index e7e2d1062..d1ed8cba1 100644
--- a/src/Jackett.Updater/Program.cs
+++ b/src/Jackett.Updater/Program.cs
@@ -427,6 +427,7 @@ namespace Jackett.Updater
                 "Definitions/qxr.yml",
                 "Definitions/rapidetracker.yml",
                 "Definitions/rarbg.yml", // migrated to C#
+                "Definitions/redbits.yml", // switch to *-API #8682
                 "Definitions/redtopia.yml",
                 "Definitions/reelflix.yml", // switch to *-API #8682
                 "Definitions/renegade.yml",