diff --git a/src/lib/event-metadata.ts b/src/lib/event-metadata.ts
index 383d1bee..d14b7052 100644
--- a/src/lib/event-metadata.ts
+++ b/src/lib/event-metadata.ts
@@ -57,6 +57,41 @@ export function getRelayListFromEvent(event?: Event | null, blockedRelays?: stri
   }
 }
 
+/** Kind 0 JSON `nip05` may be a string or string[]; tags are always strings. */
+function firstNip05StringFromJson(raw: unknown): string | undefined {
+  if (typeof raw === 'string') {
+    const t = raw.trim()
+    return t || undefined
+  }
+  if (Array.isArray(raw)) {
+    for (const x of raw) {
+      if (typeof x === 'string') {
+        const t = x.trim()
+        if (t) return t
+      }
+    }
+  }
+  return undefined
+}
+
+function nip05ListFromJson(raw: unknown): string[] | undefined {
+  const out: string[] = []
+  const seen = new Set<string>()
+  const add = (s: string) => {
+    const t = s.trim()
+    if (!t || seen.has(t)) return
+    seen.add(t)
+    out.push(t)
+  }
+  if (typeof raw === 'string') add(raw)
+  else if (Array.isArray(raw)) {
+    for (const x of raw) {
+      if (typeof x === 'string') add(x)
+    }
+  }
+  return out.length > 0 ? out : undefined
+}
+
 export function getProfileFromEvent(event: Event) {
   // Parse JSON content as fallback
   let profileObj: any = {}
@@ -73,8 +108,10 @@ export function getProfileFromEvent(event: Event) {
   const lud16Tags = event.tags.filter(tag => tag[0] === 'lud16' && tag[1]).map(tag => tag[1])
   
   // Use first tag entry for single values, or fallback to JSON
-  const nip05 = nip05Tags.length > 0 ? nip05Tags[0] : profileObj.nip05
-  const nip05List = nip05Tags.length > 0 ? nip05Tags : (profileObj.nip05 ? [profileObj.nip05] : undefined)
+  const nip05 =
+    nip05Tags.length > 0 ? nip05Tags[0] : firstNip05StringFromJson(profileObj.nip05)
+  const nip05List =
+    nip05Tags.length > 0 ? nip05Tags : nip05ListFromJson(profileObj.nip05)
   
   const website = websiteTags.length > 0 
     ? normalizeHttpUrl(websiteTags[0]) 
diff --git a/src/lib/nip05.ts b/src/lib/nip05.ts
index 32bd4d03..72cbbcc1 100644
--- a/src/lib/nip05.ts
+++ b/src/lib/nip05.ts
@@ -9,16 +9,31 @@ type TVerifyNip05Result = {
   relays?: string[]
 }
 
+function asNip05LookupString(value: unknown): string {
+  if (typeof value === 'string') return value
+  if (value == null) return ''
+  if (Array.isArray(value)) {
+    for (const x of value) {
+      if (typeof x === 'string' && x.trim()) return x
+    }
+    return ''
+  }
+  return String(value)
+}
+
 const verifyNip05ResultCache = new LRUCache<string, TVerifyNip05Result>({
   max: 1000,
   fetchMethod: (key) => {
-    const { nip05, pubkey } = JSON.parse(key)
-    return _verifyNip05(nip05, pubkey)
+    const { nip05, pubkey } = JSON.parse(key) as { nip05?: unknown; pubkey?: unknown }
+    return _verifyNip05(asNip05LookupString(nip05), typeof pubkey === 'string' ? pubkey : '')
   }
 })
 
 async function _verifyNip05(nip05: string, pubkey: string): Promise<TVerifyNip05Result> {
-  const [nip05Name, nip05Domain] = nip05?.split('@') || [undefined, undefined]
+  const nip05Str = asNip05LookupString(nip05)
+  const parts = nip05Str ? nip05Str.split('@') : []
+  const nip05Name = parts[0]
+  const nip05Domain = parts[1]
   const result: TVerifyNip05Result = { isVerified: false, nip05Name, nip05Domain }
   if (!nip05Name || !nip05Domain || !pubkey) return result
 
@@ -37,12 +52,14 @@ async function _verifyNip05(nip05: string, pubkey: string): Promise<TVerifyNip05
 }
 
 export async function verifyNip05(nip05: string, pubkey: string): Promise<TVerifyNip05Result> {
-  const result = await verifyNip05ResultCache.fetch(JSON.stringify({ nip05, pubkey }))
+  const nip05Str = asNip05LookupString(nip05)
+  const pubkeyStr = typeof pubkey === 'string' ? pubkey : ''
+  const result = await verifyNip05ResultCache.fetch(JSON.stringify({ nip05: nip05Str, pubkey: pubkeyStr }))
   if (result) {
     return result
   }
-  const [nip05Name, nip05Domain] = nip05?.split('@') || [undefined, undefined]
-  return { isVerified: false, nip05Name, nip05Domain }
+  const parts = nip05Str ? nip05Str.split('@') : []
+  return { isVerified: false, nip05Name: parts[0], nip05Domain: parts[1] }
 }
 
 export function getWellKnownNip05Url(domain: string, name?: string): string {