diff --git a/lib/actions/door.ts b/lib/actions/door.ts
index 8fd43a9..d558392 100644
--- a/lib/actions/door.ts
+++ b/lib/actions/door.ts
@@ -282,7 +282,7 @@ export async function testDoorConnection(input: unknown) {
   revalidatePath('/door/manage')
   return result.ok
     ? { data: { ok: true, status: result.status } }
-    : { error: result.reason }
+    : { error: 'The door controller call failed. Check the door audit log for the redacted detail.' }
 }
 
 export async function listDoorAccessLog() {
@@ -511,7 +511,7 @@ export async function grantCard(input: unknown) {
       targetMemberId, action: 'grant', success: false,
       detail: `failed: ${result.reason}`, password,
     })
-    return { error: result.reason }
+    return { error: 'The door controller call failed. Check the door audit log for the redacted detail.' }
   }
 
   await auditDoor(admin, {
@@ -590,7 +590,7 @@ export async function revokeCard(input: unknown) {
       targetMemberId, action: 'revoke', success: false,
       detail: `failed (slot ${slot} kept): ${result.reason}`, password,
     })
-    return { error: result.reason }
+    return { error: 'The door controller call failed. Check the door audit log for the redacted detail.' }
   }
 
   await admin.from('door_card_slots').delete().eq('connection_id', connectionId).eq('card_id', cardId)
@@ -688,7 +688,7 @@ export async function doorControl(input: unknown) {
   })
 
   revalidatePath('/door/manage')
-  return result.ok ? { data: { ok: true, status: result.status } } : { error: result.reason }
+  return result.ok ? { data: { ok: true, status: result.status } } : { error: 'The door controller call failed. Check the door audit log for the redacted detail.' }
 }
 
 // ─── Member self-entry ("buzz me in") ────────────────────────────────────────
@@ -799,7 +799,7 @@ export async function selfEntry(input: unknown) {
   })
 
   revalidatePath('/dashboard')
-  return result.ok ? { data: { ok: true } } : { error: result.reason }
+  return result.ok ? { data: { ok: true } } : { error: 'The door controller call failed. Check the door audit log for the redacted detail.' }
 }
 
 // The signed-in member's OWN door activity (rows where they were the actor or
diff --git a/lib/door-logic.ts b/lib/door-logic.ts
index ee19900..7f75e7b 100644
--- a/lib/door-logic.ts
+++ b/lib/door-logic.ts
@@ -211,11 +211,25 @@ export function applyTemplate(
 // the shared door password: any literal occurrence, and any e=/&e= query
 // value (the firmware auth param), become "<redacted>". The password is a
 // credential and must never land in door_access_log.
-export function redactDoorSecrets(text: string, password?: string | null): string {
+export function redactDoorSecrets(
+  text: string,
+  password?: string | null,
+  authParam?: string | null,
+): string {
   let out = text
   if (password && password.length > 0) {
     out = out.split(password).join('<redacted>')
   }
+  // The connection's actual auth query param (generic adapters may name it
+  // anything, not just e=/pw=). Scrub its value regardless of the name so a
+  // verbose upstream error echoing the URL cannot leak the secret even when
+  // `password` is empty/unknown.
+  if (authParam && /^\w+$/.test(authParam)) {
+    out = out.replace(
+      new RegExp(`([?&]${authParam}=)[^&\\s"']*`, 'gi'),
+      '$1<redacted>',
+    )
+  }
   out = out.replace(/([?&](?:e|pw|password|api[_-]?key|token)=)[^&\s"']*/gi, '$1<redacted>')
   return out
 }
diff --git a/lib/door/executor.ts b/lib/door/executor.ts
index 756d82a..e63f5cf 100644
--- a/lib/door/executor.ts
+++ b/lib/door/executor.ts
@@ -18,6 +18,7 @@ export async function callDoor(opts: {
   url: string
   pinnedHost: string
   password?: string | null
+  authParam?: string | null
   timeoutMs?: number
 }): Promise<DoorCallResult> {
   const guard = validateDoorTarget(opts.url, opts.pinnedHost)
@@ -57,11 +58,11 @@ export async function callDoor(opts: {
         /* ignore */
       }
     }
-    const snippet = redactDoorSecrets(received.slice(0, SNIPPET), opts.password)
+    const snippet = redactDoorSecrets(received.slice(0, SNIPPET), opts.password, opts.authParam)
     return { ok: res.ok, status: res.status, snippet }
   } catch (e) {
     const msg = e instanceof Error ? e.message : 'request failed'
-    return { ok: false, reason: redactDoorSecrets(msg, opts.password) }
+    return { ok: false, reason: redactDoorSecrets(msg, opts.password, opts.authParam) }
   } finally {
     clearTimeout(timer)
   }