diff --git a/src/components/ApplicationHandlerInfo/index.tsx b/src/components/ApplicationHandlerInfo/index.tsx
new file mode 100644
index 0000000..7adcd8a
--- /dev/null
+++ b/src/components/ApplicationHandlerInfo/index.tsx
@@ -0,0 +1,137 @@
+import { Badge } from '@/components/ui/badge'
+import { Button } from '@/components/ui/button'
+import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card'
+import { ExternalLink, Globe, Smartphone, Monitor } from 'lucide-react'
+import { Event } from 'nostr-tools'
+import { useMemo } from 'react'
+import { useTranslation } from 'react-i18next'
+import nip89Service from '@/services/nip89.service'
+
+interface ApplicationHandlerInfoProps {
+  event: Event
+  className?: string
+}
+
+export default function ApplicationHandlerInfo({ event, className }: ApplicationHandlerInfoProps) {
+  const { t } = useTranslation()
+  
+  const handlerInfo = useMemo(() => {
+    return nip89Service.parseApplicationHandlerInfo(event)
+  }, [event])
+
+  if (!handlerInfo) {
+    return null
+  }
+
+  const handlePlatformClick = (url: string) => {
+    // Replace bech32 placeholder with actual event ID
+    const actualUrl = url.replace('bech32', event.id)
+    window.open(actualUrl, '_blank', 'noopener,noreferrer')
+  }
+
+  const platformButtons = Object.entries(handlerInfo.platforms)
+    .filter(([_, url]) => url)
+    .map(([platform, url]) => {
+      const icons = {
+        web: Globe,
+        ios: Smartphone,
+        android: Smartphone,
+        desktop: Monitor
+      }
+      
+      const Icon = icons[platform as keyof typeof icons]
+      const platformName = platform.charAt(0).toUpperCase() + platform.slice(1)
+      
+      return (
+        <Button
+          key={platform}
+          variant="outline"
+          size="sm"
+          onClick={() => handlePlatformClick(url)}
+          className="flex items-center gap-2"
+        >
+          <Icon className="w-4 h-4" />
+          {platformName}
+        </Button>
+      )
+    })
+
+  return (
+    <Card className={className}>
+      <CardHeader>
+        <div className="flex items-start gap-4">
+          {handlerInfo.picture && (
+            <img
+              src={handlerInfo.picture}
+              alt={handlerInfo.name}
+              className="w-16 h-16 rounded-lg object-cover"
+            />
+          )}
+          <div className="flex-1 min-w-0">
+            <CardTitle className="text-xl">{handlerInfo.name}</CardTitle>
+            {handlerInfo.description && (
+              <CardDescription className="mt-2">
+                {handlerInfo.description}
+              </CardDescription>
+            )}
+            {handlerInfo.website && (
+              <a
+                href={handlerInfo.website}
+                target="_blank"
+                rel="noopener noreferrer"
+                className="inline-flex items-center gap-1 text-sm text-blue-600 hover:text-blue-800 mt-2"
+              >
+                <ExternalLink className="w-4 h-4" />
+                {handlerInfo.website}
+              </a>
+            )}
+          </div>
+        </div>
+      </CardHeader>
+      
+      <CardContent className="space-y-4">
+        {/* Supported Event Kinds */}
+        <div>
+          <h4 className="text-sm font-semibold mb-2">
+            {t('Supported Event Types')}
+          </h4>
+          <div className="flex flex-wrap gap-1">
+            {handlerInfo.supportedKinds.map(kind => (
+              <Badge key={kind} variant="secondary">
+                Kind {kind}
+              </Badge>
+            ))}
+          </div>
+        </div>
+
+        {/* Platform Access */}
+        {platformButtons.length > 0 && (
+          <div>
+            <h4 className="text-sm font-semibold mb-2">
+              {t('Access via')}
+            </h4>
+            <div className="flex flex-wrap gap-2">
+              {platformButtons}
+            </div>
+          </div>
+        )}
+
+        {/* Relays */}
+        {handlerInfo.relays.length > 0 && (
+          <div>
+            <h4 className="text-sm font-semibold mb-2">
+              {t('Recommended Relays')}
+            </h4>
+            <div className="space-y-1">
+              {handlerInfo.relays.map((relay, index) => (
+                <div key={index} className="text-sm text-muted-foreground font-mono">
+                  {relay}
+                </div>
+              ))}
+            </div>
+          </div>
+        )}
+      </CardContent>
+    </Card>
+  )
+}
diff --git a/src/components/ApplicationHandlerRecommendation/index.tsx b/src/components/ApplicationHandlerRecommendation/index.tsx
new file mode 100644
index 0000000..f67730a
--- /dev/null
+++ b/src/components/ApplicationHandlerRecommendation/index.tsx
@@ -0,0 +1,78 @@
+import { Badge } from '@/components/ui/badge'
+import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card'
+import { Event } from 'nostr-tools'
+import { useMemo } from 'react'
+import { useTranslation } from 'react-i18next'
+import nip89Service from '@/services/nip89.service'
+
+interface ApplicationHandlerRecommendationProps {
+  event: Event
+  className?: string
+}
+
+export default function ApplicationHandlerRecommendation({ 
+  event, 
+  className 
+}: ApplicationHandlerRecommendationProps) {
+  const { t } = useTranslation()
+  
+  const recommendation = useMemo(() => {
+    return nip89Service.parseApplicationHandlerRecommendation(event)
+  }, [event])
+
+  if (!recommendation) {
+    return null
+  }
+
+  return (
+    <Card className={className}>
+      <CardHeader>
+        <CardTitle className="text-lg">
+          {t('Application Recommendations')}
+        </CardTitle>
+        <CardDescription>
+          {t('Recommended applications for handling events of kind {{kind}}', { 
+            kind: recommendation.supportedKind 
+          })}
+        </CardDescription>
+      </CardHeader>
+      
+      <CardContent>
+        <div className="space-y-3">
+          {recommendation.handlers.map((handler, index) => (
+            <div key={index} className="flex items-center justify-between p-3 border rounded-lg">
+              <div className="flex-1 min-w-0">
+                <div className="text-sm font-medium">
+                  {t('Handler {{index}}', { index: index + 1 })}
+                </div>
+                <div className="text-xs text-muted-foreground font-mono">
+                  {handler.pubkey.substring(0, 16)}...{handler.pubkey.substring(-8)}
+                </div>
+                {handler.identifier && (
+                  <div className="text-xs text-muted-foreground">
+                    ID: {handler.identifier}
+                  </div>
+                )}
+                {handler.relay && (
+                  <div className="text-xs text-muted-foreground font-mono">
+                    {handler.relay}
+                  </div>
+                )}
+              </div>
+              <div className="flex items-center gap-2">
+                {handler.platform && (
+                  <Badge variant="outline">
+                    {handler.platform}
+                  </Badge>
+                )}
+                <Badge variant="secondary">
+                  Kind {recommendation.supportedKind}
+                </Badge>
+              </div>
+            </div>
+          ))}
+        </div>
+      </CardContent>
+    </Card>
+  )
+}
diff --git a/src/components/ClientTag/index.tsx b/src/components/ClientTag/index.tsx
index b441cc0..f7b1cea 100644
--- a/src/components/ClientTag/index.tsx
+++ b/src/components/ClientTag/index.tsx
@@ -1,17 +1,16 @@
 import { getUsingClient } from '@/lib/event'
 import { NostrEvent } from 'nostr-tools'
 import { useMemo } from 'react'
-import { useTranslation } from 'react-i18next'
+import { Badge } from '@/components/ui/badge'
 
 export default function ClientTag({ event }: { event: NostrEvent }) {
-  const { t } = useTranslation()
   const usingClient = useMemo(() => getUsingClient(event), [event])
 
   if (!usingClient) return null
 
   return (
-    <span className="text-sm text-muted-foreground shrink-0">
-      {t('via {{client}}', { client: usingClient })}
-    </span>
+    <Badge variant="outline" className="text-xs px-2 py-1 h-auto">
+      {usingClient}
+    </Badge>
   )
 }
diff --git a/src/components/ContentPreview/index.tsx b/src/components/ContentPreview/index.tsx
index 8b4b8bd..8772acc 100644
--- a/src/components/ContentPreview/index.tsx
+++ b/src/components/ContentPreview/index.tsx
@@ -17,6 +17,8 @@ import PollPreview from './PollPreview'
 import VideoNotePreview from './VideoNotePreview'
 import ZapPreview from './ZapPreview'
 import DiscussionNote from '../DiscussionNote'
+import ApplicationHandlerInfo from '../ApplicationHandlerInfo'
+import ApplicationHandlerRecommendation from '../ApplicationHandlerRecommendation'
 
 export default function ContentPreview({
   event,
@@ -111,5 +113,13 @@ export default function ContentPreview({
     return <ZapPreview event={event} className={className} />
   }
 
+  if (event.kind === ExtendedKind.APPLICATION_HANDLER_INFO) {
+    return <ApplicationHandlerInfo event={event} className={className} />
+  }
+
+  if (event.kind === ExtendedKind.APPLICATION_HANDLER_RECOMMENDATION) {
+    return <ApplicationHandlerRecommendation event={event} className={className} />
+  }
+
   return <div className={className}>[{t('Cannot handle event of kind k', { k: event.kind })}]</div>
 }
diff --git a/src/constants.ts b/src/constants.ts
index d069f16..3148a37 100644
--- a/src/constants.ts
+++ b/src/constants.ts
@@ -130,7 +130,10 @@ export const ExtendedKind = {
   ZAP_RECEIPT: 9735,
   PUBLICATION: 30040,
   WIKI_ARTICLE: 30818,
-  WIKI_CHAPTER: 30041
+  PUBLICATION_CONTENT: 30041,
+  // NIP-89 Application Handlers
+  APPLICATION_HANDLER_RECOMMENDATION: 31989,
+  APPLICATION_HANDLER_INFO: 31990
 }
 
 export const SUPPORTED_KINDS = [
@@ -151,7 +154,10 @@ export const SUPPORTED_KINDS = [
   ExtendedKind.ZAP_RECEIPT,
   ExtendedKind.PUBLICATION,
   ExtendedKind.WIKI_ARTICLE,
-  ExtendedKind.WIKI_CHAPTER
+  ExtendedKind.PUBLICATION_CONTENT,
+  // NIP-89 Application Handlers
+  ExtendedKind.APPLICATION_HANDLER_RECOMMENDATION,
+  ExtendedKind.APPLICATION_HANDLER_INFO
 ]
 
 export const URL_REGEX =
diff --git a/src/lib/draft-event.ts b/src/lib/draft-event.ts
index 1cc3631..5881d44 100644
--- a/src/lib/draft-event.ts
+++ b/src/lib/draft-event.ts
@@ -868,7 +868,18 @@ function buildResponseTag(value: string) {
   return ['response', value]
 }
 
-function buildClientTag() {
+function buildClientTag(handlerPubkey?: string, handlerIdentifier?: string, relay?: string) {
+  // Use NIP-89 format if handler information is provided
+  if (handlerPubkey && handlerIdentifier) {
+    const aTag = `31990:${handlerPubkey}:${handlerIdentifier}`
+    const tag = ['client', 'Jumble ImWald', aTag]
+    if (relay) {
+      tag.push(relay)
+    }
+    return tag
+  }
+  
+  // Fallback to simple format for backward compatibility
   return ['client', 'jumble']
 }
 
diff --git a/src/lib/event.ts b/src/lib/event.ts
index 5f034eb..829a715 100644
--- a/src/lib/event.ts
+++ b/src/lib/event.ts
@@ -194,7 +194,13 @@ export function getNoteBech32Id(event: Event) {
 }
 
 export function getUsingClient(event: Event) {
-  return event.tags.find(tagNameEquals('client'))?.[1]
+  const clientTag = event.tags.find(tagNameEquals('client'))
+  if (!clientTag) return undefined
+  
+  // NIP-89 client tag format: ["client", "Client Name", "31990:pubkey:identifier", "relay"]
+  // Simple format: ["client", "client_name"]
+  // For display purposes, we use the client name (second element)
+  return clientTag[1]
 }
 
 export function getImetaInfosFromEvent(event: Event) {
diff --git a/src/lib/nip89-utils.ts b/src/lib/nip89-utils.ts
new file mode 100644
index 0000000..261cbf2
--- /dev/null
+++ b/src/lib/nip89-utils.ts
@@ -0,0 +1,24 @@
+import { Event } from 'nostr-tools'
+import nip89Service from '@/services/nip89.service'
+
+/**
+ * Create the Jumble ImWald application handler info event (kind 31990)
+ * This can be published using the existing publish function from NostrProvider
+ */
+export function createJumbleImWaldHandlerInfoEvent(pubkey: string): Omit<Event, 'id' | 'sig'> {
+  return nip89Service.createJumbleImWaldHandlerInfo(pubkey)
+}
+
+/**
+ * Example usage in a component:
+ * 
+ * const { pubkey, signEvent, publish } = useNostr()
+ * 
+ * const handlePublishHandlerInfo = async () => {
+ *   if (!pubkey) return
+ *   
+ *   const handlerInfoEvent = createJumbleImWaldHandlerInfoEvent(pubkey)
+ *   const signedEvent = await signEvent(handlerInfoEvent)
+ *   await publish(signedEvent)
+ * }
+ */
diff --git a/src/pages/primary/DiscussionsPage/CreateThreadDialog.tsx b/src/pages/primary/DiscussionsPage/CreateThreadDialog.tsx
index 7d22d08..776ab03 100644
--- a/src/pages/primary/DiscussionsPage/CreateThreadDialog.tsx
+++ b/src/pages/primary/DiscussionsPage/CreateThreadDialog.tsx
@@ -45,6 +45,10 @@ function buildClientTag(): string[] {
   return ['client', 'jumble']
 }
 
+function buildAltTag(): string[] {
+  return ['alt', 'This event was published by https://jumble.imwald.eu.']
+}
+
 
 interface DynamicTopic {
   id: string
@@ -406,6 +410,7 @@ export default function CreateThreadDialog({
       // Add client tag if enabled
       if (addClientTag) {
         tags.push(buildClientTag())
+        tags.push(buildAltTag())
       }
       
       // Create the thread event (kind 11)
diff --git a/src/services/nip89.service.ts b/src/services/nip89.service.ts
new file mode 100644
index 0000000..0434e34
--- /dev/null
+++ b/src/services/nip89.service.ts
@@ -0,0 +1,250 @@
+import { ExtendedKind } from '@/constants'
+import { Event, kinds } from 'nostr-tools'
+import * as nip19 from 'nostr-tools/nip19'
+
+export interface ApplicationHandlerInfo {
+  name: string
+  description?: string
+  website?: string
+  picture?: string
+  supportedKinds: number[]
+  platforms: {
+    web?: string
+    ios?: string
+    android?: string
+    desktop?: string
+  }
+  relays: string[]
+}
+
+export interface ApplicationHandlerRecommendation {
+  supportedKind: number
+  handlers: Array<{
+    pubkey: string
+    identifier: string
+    relay: string
+    platform?: string
+  }>
+}
+
+class Nip89Service {
+  static instance: Nip89Service
+
+  constructor() {
+    if (Nip89Service.instance) {
+      return Nip89Service.instance
+    }
+    Nip89Service.instance = this
+  }
+
+  /**
+   * Create a NIP-89 application handler info event (kind 31990)
+   */
+  createApplicationHandlerInfoEvent(
+    pubkey: string,
+    handlerInfo: ApplicationHandlerInfo,
+    identifier: string = 'main'
+  ): Omit<Event, 'id' | 'sig'> {
+    const content = JSON.stringify({
+      name: handlerInfo.name,
+      description: handlerInfo.description,
+      website: handlerInfo.website,
+      picture: handlerInfo.picture
+    })
+
+    const tags: string[][] = [
+      ['d', identifier],
+      ...handlerInfo.supportedKinds.map(kind => ['k', kind.toString()]),
+      ...handlerInfo.relays.map(relay => ['relay', relay])
+    ]
+
+    // Add platform-specific handlers
+    if (handlerInfo.platforms.web) {
+      tags.push(['web', handlerInfo.platforms.web, 'nevent'])
+    }
+    if (handlerInfo.platforms.ios) {
+      tags.push(['ios', handlerInfo.platforms.ios, 'nevent'])
+    }
+    if (handlerInfo.platforms.android) {
+      tags.push(['android', handlerInfo.platforms.android, 'nevent'])
+    }
+    if (handlerInfo.platforms.desktop) {
+      tags.push(['desktop', handlerInfo.platforms.desktop, 'nevent'])
+    }
+
+    return {
+      kind: ExtendedKind.APPLICATION_HANDLER_INFO,
+      pubkey,
+      content,
+      created_at: Math.floor(Date.now() / 1000),
+      tags
+    }
+  }
+
+  /**
+   * Create a NIP-89 application handler recommendation event (kind 31989)
+   */
+  createApplicationHandlerRecommendationEvent(
+    pubkey: string,
+    recommendation: ApplicationHandlerRecommendation
+  ): Omit<Event, 'id' | 'sig'> {
+    const tags: string[][] = [
+      ['d', recommendation.supportedKind.toString()],
+      ...recommendation.handlers.map(handler => {
+        const aTag = `31990:${handler.pubkey}:${handler.identifier}`
+        const tag = ['a', aTag, handler.relay]
+        if (handler.platform) {
+          tag.push(handler.platform)
+        }
+        return tag
+      })
+    ]
+
+    return {
+      kind: ExtendedKind.APPLICATION_HANDLER_RECOMMENDATION,
+      pubkey,
+      content: '',
+      created_at: Math.floor(Date.now() / 1000),
+      tags
+    }
+  }
+
+  /**
+   * Parse application handler info from a kind 31990 event
+   */
+  parseApplicationHandlerInfo(event: Event): ApplicationHandlerInfo | null {
+    if (event.kind !== ExtendedKind.APPLICATION_HANDLER_INFO) {
+      return null
+    }
+
+    let metadata: any = {}
+    try {
+      metadata = JSON.parse(event.content || '{}')
+    } catch {
+      // If parsing fails, use empty object
+    }
+
+    const supportedKinds: number[] = []
+    const platforms: ApplicationHandlerInfo['platforms'] = {}
+    const relays: string[] = []
+
+    for (const tag of event.tags) {
+      if (tag[0] === 'k' && tag[1]) {
+        const kind = parseInt(tag[1])
+        if (!isNaN(kind)) {
+          supportedKinds.push(kind)
+        }
+      } else if (tag[0] === 'relay' && tag[1]) {
+        relays.push(tag[1])
+      } else if (tag[0] === 'web' && tag[1]) {
+        platforms.web = tag[1]
+      } else if (tag[0] === 'ios' && tag[1]) {
+        platforms.ios = tag[1]
+      } else if (tag[0] === 'android' && tag[1]) {
+        platforms.android = tag[1]
+      } else if (tag[0] === 'desktop' && tag[1]) {
+        platforms.desktop = tag[1]
+      }
+    }
+
+    return {
+      name: metadata.name || 'Unknown Application',
+      description: metadata.description,
+      website: metadata.website,
+      picture: metadata.picture,
+      supportedKinds,
+      platforms,
+      relays
+    }
+  }
+
+  /**
+   * Parse application handler recommendation from a kind 31989 event
+   */
+  parseApplicationHandlerRecommendation(event: Event): ApplicationHandlerRecommendation | null {
+    if (event.kind !== ExtendedKind.APPLICATION_HANDLER_RECOMMENDATION) {
+      return null
+    }
+
+    const dTag = event.tags.find(tag => tag[0] === 'd')
+    if (!dTag || !dTag[1]) {
+      return null
+    }
+
+    const supportedKind = parseInt(dTag[1])
+    if (isNaN(supportedKind)) {
+      return null
+    }
+
+    const handlers = event.tags
+      .filter(tag => tag[0] === 'a' && tag[1])
+      .map(tag => {
+        const aTag = tag[1]
+        const parts = aTag.split(':')
+        if (parts.length !== 3 || parts[0] !== '31990') {
+          return null
+        }
+
+        return {
+          pubkey: parts[1],
+          identifier: parts[2],
+          relay: tag[2] || '',
+          platform: tag[3]
+        }
+      })
+      .filter((handler): handler is NonNullable<typeof handler> => handler !== null)
+
+    return {
+      supportedKind,
+      handlers
+    }
+  }
+
+  /**
+   * Create the Jumble ImWald application handler info event
+   */
+  createJumbleImWaldHandlerInfo(pubkey: string): Omit<Event, 'id' | 'sig'> {
+    const handlerInfo: ApplicationHandlerInfo = {
+      name: 'Jumble ImWald',
+      description: 'A modern Nostr client with advanced features for content discovery, discussions, and community building.',
+      website: 'https://jumble.gitcitadel.eu',
+      picture: 'https://jumble.gitcitadel.eu/logo.png',
+      supportedKinds: [
+        kinds.ShortTextNote,
+        kinds.Repost,
+        kinds.Reaction,
+        kinds.Zap,
+        kinds.LongFormArticle,
+        kinds.Highlights,
+        ExtendedKind.PICTURE,
+        ExtendedKind.VIDEO,
+        ExtendedKind.SHORT_VIDEO,
+        ExtendedKind.POLL,
+        ExtendedKind.COMMENT,
+        ExtendedKind.VOICE,
+        ExtendedKind.VOICE_COMMENT,
+        ExtendedKind.DISCUSSION,
+        ExtendedKind.RELAY_REVIEW,
+        ExtendedKind.PUBLICATION,
+        ExtendedKind.WIKI_ARTICLE,
+        ExtendedKind.WIKI_CHAPTER
+      ],
+      platforms: {
+        web: 'https://jumble.gitcitadel.eu/note/bech32',
+        ios: 'jumble://note/bech32',
+        android: 'jumble://note/bech32',
+        desktop: 'jumble://note/bech32'
+      },
+      relays: [
+        'wss://relay.damus.io',
+        'wss://relay.snort.social',
+        'wss://nos.lol',
+        'wss://relay.nostr.band'
+      ]
+    }
+
+    return this.createApplicationHandlerInfoEvent(pubkey, handlerInfo, 'jumble-imwald')
+  }
+}
+
+export default new Nip89Service()