diff --git a/static/js/podcast-article.js b/static/js/podcast-article.js
index b235943..831d0e7 100644
--- a/static/js/podcast-article.js
+++ b/static/js/podcast-article.js
@@ -260,6 +260,20 @@ const send = (url, method, body) => fetch(url, {
   body: body === undefined ? undefined : JSON.stringify(body),
 });
 
+// This device's name for reserving a wish (/article/claim/), kept per browser or app.
+let memDevice = '';
+export function deviceId() {
+  try {
+    let id = localStorage.getItem('diora-device-id');
+    if (!id) { id = 'd-' + Math.random().toString(36).slice(2, 12); localStorage.setItem('diora-device-id', id); }
+    return id;
+  } catch (e) {
+    return memDevice || (memDevice = 'd-' + Math.random().toString(36).slice(2, 12));
+  }
+}
+export const claimWish = id => send('/podcasts/episodes/' + id + '/article/claim/', 'POST', {device: deviceId()});
+export const release = id => send('/podcasts/episodes/' + id + '/article/claim/', 'DELETE', {device: deviceId()});
+
 async function getJson(url) {
   const r = await fetch(url, {cache: 'no-store'});
   return {status: r.status, ok: r.ok, data: r.ok ? await r.json() : null};
@@ -330,7 +344,7 @@ export async function pickUp({onState} = {}) {
     for (const wish of pending) {
       if (gaveUp.has(wish.episode_id)) { result.skipped++; continue; }
       let claim;
-      try { claim = await send('/podcasts/episodes/' + wish.episode_id + '/article/claim/', 'POST', {}); } catch (e) { return result; }
+      try { claim = await claimWish(wish.episode_id); } catch (e) { return result; }
       if (!claim.ok) { result.skipped++; continue; }   // 409: another device has it
       try {
         const saved = await write(wish.episode_id, {onState});
@@ -339,7 +353,7 @@ export async function pickUp({onState} = {}) {
       } catch (e) {
         result.failed++;
         gaveUp.add(wish.episode_id);
-        try { await send('/podcasts/episodes/' + wish.episode_id + '/article/claim/', 'DELETE'); } catch (e2) { /* it runs out in 15 minutes */ }
+        try { await release(wish.episode_id); } catch (e2) { /* it runs out in 15 minutes */ }
       }
     }
   } finally {
@@ -359,7 +373,7 @@ export function watch(on) {
 export const _reset = () => { running = false; gaveUp.clear(); };
 
 if (typeof window !== 'undefined' && typeof document !== 'undefined') {
-  window.DioraPodcastArticle = {write, pickUp, watch, notifyDone, markdownToHtml, transcriptToText};
+  window.DioraPodcastArticle = {write, pickUp, watch, notifyDone, claim: claimWish, release, deviceId, markdownToHtml, transcriptToText};
   window.dispatchEvent(new Event('diora-podcast-article'));
   // At the start of diora.
   setTimeout(() => { pickUp(); }, 4000);
diff --git a/tools/tests/podcast-article.test.mjs b/tools/tests/podcast-article.test.mjs
index 2b974ae..f1904c8 100644
--- a/tools/tests/podcast-article.test.mjs
+++ b/tools/tests/podcast-article.test.mjs
@@ -135,10 +135,10 @@ test('pickUp: claim, 409 skipped, failure releases the claim, notifier per succe
   });
   const r = await pa.pickUp();
   assert.deepEqual(r, {done: 1, failed: 1, skipped: 1});
-  assert.ok(w.calls.includes('POST /podcasts/episodes/2/article/claim/ {}'));
+  assert.ok(w.calls.some(c => /^POST \/podcasts\/episodes\/2\/article\/claim\/ \{"device":"d-/.test(c)));
   assert.ok(!w.calls.some(c => c.startsWith('GET /podcasts/episodes/2/')));      // 409: not written
-  assert.ok(w.calls.includes('DELETE /podcasts/episodes/4/article/claim/'));     // failed: released
-  assert.ok(!w.calls.includes('DELETE /podcasts/episodes/1/article/claim/'));
+  assert.ok(w.calls.some(c => c.startsWith('DELETE /podcasts/episodes/4/article/claim/')));     // failed: released
+  assert.ok(!w.calls.some(c => c.startsWith('DELETE /podcasts/episodes/1/article/claim/')));
   assert.deepEqual(w.notices, ['Artikel fertig: A']);
   // The failed one is not tried again in this visit.
   const w2 = stubWorld({pending: [{episode_id: 4, title: 'Vier'}]});
@@ -168,5 +168,5 @@ test('pickUp: no key does nothing, not even a request; no second run at the same
   const b = await pa.pickUp();
   assert.deepEqual(b, {busy: true});
   assert.equal((await a).done, 1);
-  assert.equal(w2.calls.filter(c => c.startsWith('POST') && c.endsWith('/claim/ {}')).length, 1);
+  assert.equal(w2.calls.filter(c => c.startsWith('POST') && c.includes('/claim/ {"device":')).length, 1);
 });