diff --git a/apps/admin-desktop/src/hooks/useEligibleResponders.ts b/apps/admin-desktop/src/hooks/useEligibleResponders.ts
new file mode 100644
index 00000000..b9846557
--- /dev/null
+++ b/apps/admin-desktop/src/hooks/useEligibleResponders.ts
@@ -0,0 +1,53 @@
+import { useEffect, useState } from 'react'
+import { collection, onSnapshot, query, where } from 'firebase/firestore'
+import { db } from '../app/firebase'
+import { getDatabase, ref, onValue } from 'firebase/database'
+import { firebaseApp } from '../app/firebase'
+
+export interface EligibleResponder {
+  uid: string
+  displayName: string
+  agencyId: string
+}
+
+export function useEligibleResponders(municipalityId: string | undefined) {
+  const [responders, setResponders] = useState<Record<string, EligibleResponder>>({})
+  const [shift, setShift] = useState<Record<string, { isOnShift: boolean }>>({})
+
+  useEffect(() => {
+    if (!municipalityId) return
+    const q = query(
+      collection(db, 'responders'),
+      where('municipalityId', '==', municipalityId),
+      where('isActive', '==', true),
+    )
+    return onSnapshot(q, (snap) => {
+      const out: Record<string, EligibleResponder> = {}
+      snap.docs.forEach((d) => {
+        const data = d.data()
+        out[d.id] = {
+          uid: d.id,
+          displayName: String(data.displayName ?? d.id),
+          agencyId: String(data.agencyId ?? 'unknown'),
+        }
+      })
+      setResponders(out)
+    })
+  }, [municipalityId])
+
+  useEffect(() => {
+    if (!municipalityId) return
+    const rtdb = getDatabase(firebaseApp)
+    const node = ref(rtdb, `/responder_index/${municipalityId}`)
+    const unsub = onValue(node, (s) => {
+      const snapVal = s.val()
+      setShift(snapVal !== null ? (snapVal as Record<string, { isOnShift: boolean }>) : {})
+    })
+    return unsub
+  }, [municipalityId])
+
+  const eligible = Object.values(responders)
+    .filter((r) => shift[r.uid]?.isOnShift === true)
+    .sort((a, b) => a.displayName.localeCompare(b.displayName))
+  return eligible
+}
diff --git a/apps/admin-desktop/src/pages/DispatchModal.tsx b/apps/admin-desktop/src/pages/DispatchModal.tsx
new file mode 100644
index 00000000..e85224db
--- /dev/null
+++ b/apps/admin-desktop/src/pages/DispatchModal.tsx
@@ -0,0 +1,67 @@
+import { useState } from 'react'
+import { useAuth } from '../app/auth-provider'
+import { useEligibleResponders } from '../hooks/useEligibleResponders'
+import { callables } from '../services/callables'
+
+export function DispatchModal({
+  reportId,
+  onClose,
+  onError,
+}: {
+  reportId: string
+  onClose: () => void
+  onError: (msg: string) => void
+}) {
+  const { claims } = useAuth()
+  const eligible = useEligibleResponders(claims?.municipalityId)
+  const [picked, setPicked] = useState<string | null>(null)
+  const [submitting, setSubmitting] = useState(false)
+
+  async function confirm() {
+    if (!picked) return
+    setSubmitting(true)
+    try {
+      await callables.dispatchResponder({
+        reportId,
+        responderUid: picked,
+        idempotencyKey: crypto.randomUUID(),
+      })
+      onClose()
+    } catch (err: unknown) {
+      onError(err instanceof Error ? err.message : 'Dispatch failed')
+      setSubmitting(false)
+    }
+  }
+
+  return (
+    <div role="dialog" aria-modal="true">
+      <h2>Dispatch a responder</h2>
+      {eligible.length === 0 ? (
+        <p>No responders on shift in your municipality.</p>
+      ) : (
+        <ul>
+          {eligible.map((r) => (
+            <li key={r.uid}>
+              <label>
+                <input
+                  type="radio"
+                  name="responder"
+                  value={r.uid}
+                  checked={picked === r.uid}
+                  onChange={() => {
+                    setPicked(r.uid)
+                  }}
+                />
+                {r.displayName} · {r.agencyId}
+              </label>
+            </li>
+          ))}
+        </ul>
+      )}
+      <button disabled={!picked || submitting} onClick={() => void confirm()}>
+        {submitting ? 'Dispatching…' : 'Confirm'}
+      </button>
+      <button onClick={onClose}>Cancel</button>
+    </div>
+  )
+}
diff --git a/apps/admin-desktop/src/services/callables.ts b/apps/admin-desktop/src/services/callables.ts
new file mode 100644
index 00000000..ad32b0e0
--- /dev/null
+++ b/apps/admin-desktop/src/services/callables.ts
@@ -0,0 +1,40 @@
+import { httpsCallable } from 'firebase/functions'
+import { functions } from '../app/firebase'
+
+type IdempotencyKey = string
+
+export const callables = {
+  verifyReport: (payload: { reportId: string; idempotencyKey: IdempotencyKey }) =>
+    httpsCallable<typeof payload, { status: string; reportId: string }>(
+      functions,
+      'verifyReport',
+    )(payload).then((r) => r.data),
+  rejectReport: (payload: {
+    reportId: string
+    reason: 'obviously_false' | 'duplicate' | 'test_submission' | 'insufficient_detail'
+    notes?: string
+    idempotencyKey: IdempotencyKey
+  }) =>
+    httpsCallable<typeof payload, { status: string; reportId: string }>(
+      functions,
+      'rejectReport',
+    )(payload).then((r) => r.data),
+  dispatchResponder: (payload: {
+    reportId: string
+    responderUid: string
+    idempotencyKey: IdempotencyKey
+  }) =>
+    httpsCallable<typeof payload, { dispatchId: string; status: string; reportId: string }>(
+      functions,
+      'dispatchResponder',
+    )(payload).then((r) => r.data),
+  cancelDispatch: (payload: {
+    dispatchId: string
+    reason: 'responder_unavailable' | 'duplicate_report' | 'admin_error' | 'citizen_withdrew'
+    idempotencyKey: IdempotencyKey
+  }) =>
+    httpsCallable<typeof payload, { status: string; dispatchId: string }>(
+      functions,
+      'cancelDispatch',
+    )(payload).then((r) => r.data),
+}
diff --git a/apps/responder-app/package.json b/apps/responder-app/package.json
index 3d14d3aa..28a969da 100644
--- a/apps/responder-app/package.json
+++ b/apps/responder-app/package.json
@@ -15,6 +15,7 @@
     "@bantayog/shared-types": "workspace:*",
     "@bantayog/shared-ui": "workspace:*",
     "@capacitor/core": "^8.3.1",
+    "firebase": "^12.12.0",
     "react": "^19.2.5",
     "react-dom": "^19.2.5"
   },
diff --git a/functions/src/__tests__/services/rate-limit.test.ts b/functions/src/__tests__/services/rate-limit.test.ts
new file mode 100644
index 00000000..f1695745
--- /dev/null
+++ b/functions/src/__tests__/services/rate-limit.test.ts
@@ -0,0 +1,70 @@
+import { describe, it, expect, beforeEach, afterEach } from 'vitest'
+import { initializeTestEnvironment, type RulesTestEnvironment } from '@firebase/rules-unit-testing'
+import { Timestamp } from 'firebase-admin/firestore'
+import { checkRateLimit } from '../../services/rate-limit'
+import { readFileSync } from 'node:fs'
+import { resolve } from 'node:path'
+
+const RULES_PATH = resolve(import.meta.dirname, '../../../../infra/firebase/firestore.rules')
+
+let testEnv: RulesTestEnvironment
+
+beforeEach(async () => {
+  testEnv = await initializeTestEnvironment({
+    projectId: 'rate-limit-test',
+    firestore: {
+      host: 'localhost',
+      port: 8080,
+      rules: readFileSync(RULES_PATH, 'utf8'),
+    },
+  })
+  await testEnv.clearFirestore()
+})
+
+afterEach(async () => {
+  await testEnv.cleanup()
+})
+
+describe('checkRateLimit', () => {
+  it('allows the first call under the limit', async () => {
+    await testEnv.withSecurityRulesDisabled(async (ctx) => {
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      const db = ctx.firestore() as any
+      // eslint-disable-next-line @typescript-eslint/no-unsafe-argument
+      const result = await checkRateLimit(db, {
+        key: 'verifyReport:uid-1',
+        limit: 60,
+        windowSeconds: 60,
+        now: Timestamp.now(),
+      })
+      expect(result.allowed).toBe(true)
+      expect(result.remaining).toBe(59)
+    })
+  })
+
+  it('denies calls past the limit and returns retryAfterSeconds', async () => {
+    await testEnv.withSecurityRulesDisabled(async (ctx) => {
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      const db = ctx.firestore() as any
+      const now = Timestamp.now()
+      for (let i = 0; i < 60; i++) {
+        // eslint-disable-next-line @typescript-eslint/no-unsafe-argument
+        await checkRateLimit(db, {
+          key: 'verifyReport:uid-1',
+          limit: 60,
+          windowSeconds: 60,
+          now,
+        })
+      }
+      // eslint-disable-next-line @typescript-eslint/no-unsafe-argument
+      const denied = await checkRateLimit(db, {
+        key: 'verifyReport:uid-1',
+        limit: 60,
+        windowSeconds: 60,
+        now,
+      })
+      expect(denied.allowed).toBe(false)
+      expect(denied.retryAfterSeconds).toBeGreaterThan(0)
+    })
+  })
+})
diff --git a/functions/src/services/rate-limit.ts b/functions/src/services/rate-limit.ts
new file mode 100644
index 00000000..c0df30d0
--- /dev/null
+++ b/functions/src/services/rate-limit.ts
@@ -0,0 +1,38 @@
+import type { Firestore, Timestamp } from 'firebase-admin/firestore'
+
+export interface RateLimitCheck {
+  key: string
+  limit: number
+  windowSeconds: number
+  now: Timestamp
+}
+
+export interface RateLimitResult {
+  allowed: boolean
+  remaining: number
+  retryAfterSeconds: number
+}
+
+export async function checkRateLimit(
+  db: Firestore,
+  { key, limit, windowSeconds, now }: RateLimitCheck,
+): Promise<RateLimitResult> {
+  const ref = db.collection('rate_limits').doc(key)
+  return db.runTransaction(async (tx) => {
+    const snap = await tx.get(ref)
+    const windowStartMs = now.toMillis() - windowSeconds * 1000
+    const bucket = snap.exists ? snap.data() : undefined
+    const existingTimes: number[] = Array.isArray(bucket?.timestamps) ? bucket.timestamps : []
+    const fresh = existingTimes.filter((ms) => ms >= windowStartMs)
+
+    if (fresh.length >= limit) {
+      const earliest = Math.min(...fresh)
+      const retryAfterSeconds = Math.ceil((earliest + windowSeconds * 1000 - now.toMillis()) / 1000)
+      return { allowed: false, remaining: 0, retryAfterSeconds: Math.max(retryAfterSeconds, 1) }
+    }
+
+    fresh.push(now.toMillis())
+    tx.set(ref, { timestamps: fresh }, { merge: true })
+    return { allowed: true, remaining: limit - fresh.length, retryAfterSeconds: 0 }
+  })
+}
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index de4f0072..099d7fe9 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -145,6 +145,9 @@ importers:
       '@capacitor/core':
         specifier: ^8.3.1
         version: 8.3.1
+      firebase:
+        specifier: ^12.12.0
+        version: 12.12.0
       react:
         specifier: ^19.2.5
         version: 19.2.5