diff --git a/apps/web/package.json b/apps/web/package.json
index ec3ac8e..a087ab0 100644
--- a/apps/web/package.json
+++ b/apps/web/package.json
@@ -22,7 +22,7 @@
     "@nichedb/premium": "workspace:*",
     "@nichedb/queue": "workspace:*",
     "@profullstack/affiliates": "^0.2.0",
-    "@profullstack/coinpay-onboard": "0.3.1",
+    "@profullstack/coinpay-onboard": "^0.5.0",
     "@profullstack/footer": "latest",
     "@profullstack/leaderboard": "^0.3.1",
     "@profullstack/nichedb": "workspace:*",
diff --git a/apps/web/src/routes/coinpay.js b/apps/web/src/routes/coinpay.js
index 7b13add..52e22c5 100644
--- a/apps/web/src/routes/coinpay.js
+++ b/apps/web/src/routes/coinpay.js
@@ -1,3 +1,4 @@
+import { grantCoinpayPass } from '@nichedb/payments/coinpay-pass';
 import { saveOpenProfileContact } from '@profullstack/profile';
 import { getCookie, setCookie } from 'hono/cookie';
 import {
@@ -114,6 +115,15 @@ export function registerCoinpay(app, overrides = null) {
       return c.text('CoinPay sign-in could not be verified.', 400);
     }
     const store = identityStore(d.run);
+    // Profullstack Pass: the claim is only seen here, so an active pass becomes
+    // a free Pro term until it expires (once per pass, bound to the CoinPay sub).
+    const grantPass = async (userId) => {
+      try {
+        await grantCoinpayPass(d.run, { userId: String(userId), sub: who.sub, pass: who.pass });
+      } catch (err) {
+        console.error('[coinpay] pass grant failed:', err instanceof Error ? err.message : err);
+      }
+    };
 
     if (pending.mode === 'connect') {
       const user = c.get('user');
@@ -121,6 +131,7 @@ export function registerCoinpay(app, overrides = null) {
         return c.redirect(back('/login', 'Sign in first, then connect CoinPay.'), 303);
       const r = await store.link(user.id, { sub: who.sub, email: who.email });
       if (r.ok) {
+        await grantPass(user.id);
         const openprofileUrl = who.userinfo?.openprofile_url;
         if (typeof openprofileUrl === 'string') {
           try {
@@ -143,6 +154,7 @@ export function registerCoinpay(app, overrides = null) {
     }
 
     const { userId } = await store.signIn({ sub: who.sub, email: who.email, name: who.name });
+    await grantPass(userId);
     const sid = await d.startSession(userId, c.req.header('user-agent'));
     c.header('set-cookie', d.sessionCookie(sid), { append: true });
     return c.redirect(pending.next || '/following', 303);
diff --git a/apps/web/src/routes/coinpay.test.js b/apps/web/src/routes/coinpay.test.js
index 86cdc19..fb695ff 100644
--- a/apps/web/src/routes/coinpay.test.js
+++ b/apps/web/src/routes/coinpay.test.js
@@ -42,7 +42,7 @@ const addUser = async (email) =>
 
 const b64 = (o) => Buffer.from(JSON.stringify(o)).toString('base64url');
 const fakeCoinpay =
-  ({ sub, email, nonce }) =>
+  ({ sub, email, nonce, pass }) =>
   async (url) => {
     const u = String(url);
     if (u.endsWith('/api/oauth/token'))
@@ -53,7 +53,7 @@ const fakeCoinpay =
         id_token: `${b64({ alg: 'HS256' })}.${b64({ iss: 'https://coinpayportal.com', aud: 'cp_test_client', sub, nonce, exp: Math.floor(Date.now() / 1000) + 600 })}.sig`,
       });
     if (u.endsWith('/api/oauth/userinfo'))
-      return Response.json({ sub, email, email_verified: false });
+      return Response.json({ sub, email, email_verified: false, ...(pass ? { pass } : {}) });
     return new Response('{}', { status: 404 });
   };
 
@@ -146,6 +146,56 @@ describe('Sign in with CoinPay', () => {
     expect(again).toEqual({ userId: sessions[0], created: false });
   });
 
+  test('an active Profullstack Pass makes the account Pro until it expires, once', async () => {
+    const expires = new Date(Date.now() + 20 * 86_400_000).toISOString();
+    const signIn = async (pass) => {
+      const coinpay = {};
+      const { app, sessions } = appWith({ coinpay });
+      const { loc, cookie } = await start(app);
+      coinpay.fetch = fakeCoinpay({
+        sub: 'pass-sub',
+        email: 'pass@example.com',
+        nonce: loc.searchParams.get('nonce'),
+        pass,
+      });
+      await app.request(
+        `/api/v1/coinpay/oauth/callback?code=c&state=${loc.searchParams.get('state')}`,
+        { headers: { cookie } },
+      );
+      return sessions[0];
+    };
+    const userId = await signIn({ active: true, expires_at: expires });
+    await signIn({ active: true, expires_at: expires });
+    const rows = await run(
+      'select plan, price_cents, expires_at, grant_ref from memberships where user_id = $1',
+      [userId],
+    );
+    expect(rows.length).toBe(1);
+    expect(rows[0].plan).toBe('pro');
+    expect(rows[0].price_cents).toBe(0);
+    expect(new Date(rows[0].expires_at).toISOString()).toBe(expires);
+    expect(rows[0].grant_ref).toBe(`coinpay-pass:pass-sub:${expires}`);
+  });
+
+  test('an inactive or expired pass grants nothing', async () => {
+    for (const [sub, pass] of [
+      ['nopass-a', { active: false }],
+      ['nopass-b', { active: true, expires_at: new Date(Date.now() - 1000).toISOString() }],
+      ['nopass-c', { active: true }],
+    ]) {
+      const coinpay = {};
+      const { app, sessions } = appWith({ coinpay });
+      const { loc, cookie } = await start(app);
+      coinpay.fetch = fakeCoinpay({ sub, email: null, nonce: loc.searchParams.get('nonce'), pass });
+      await app.request(
+        `/api/v1/coinpay/oauth/callback?code=c&state=${loc.searchParams.get('state')}`,
+        { headers: { cookie } },
+      );
+      const rows = await run('select 1 from memberships where user_id = $1', [sessions[0]]);
+      expect(rows.length).toBe(0);
+    }
+  });
+
   test('a forged state is refused and nothing is created', async () => {
     const coinpay = {
       fetch: fakeCoinpay({ sub: 'forged-sub', email: 'f@example.com', nonce: 'n' }),
diff --git a/apps/web/src/views/premium.jsx b/apps/web/src/views/premium.jsx
index 44e11d2..a2094ad 100644
--- a/apps/web/src/views/premium.jsx
+++ b/apps/web/src/views/premium.jsx
@@ -298,6 +298,11 @@ export const PremiumPage = ({
             The same Premium benefits in every term. Prices in {config.premium.currency}; paid
             upfront through CoinPay in any major coin or PayPal.
           </p>
+          <p class="muted">
+            Deposit $99 in your CoinPay wallet and get a free month:{' '}
+            <a href="https://coinpayportal.com/pass">CoinPay Pass</a>. Sign in with CoinPay to use
+            it.
+          </p>
           <form method="get" action="/premium#plans" class="row premium-promo">
             <input type="hidden" name="term" value={selectedTerm} />
             <label class="small" for="promo">
diff --git a/bun.lock b/bun.lock
index 16d35e2..6945b82 100644
--- a/bun.lock
+++ b/bun.lock
@@ -36,7 +36,7 @@
         "@nichedb/premium": "workspace:*",
         "@nichedb/queue": "workspace:*",
         "@profullstack/affiliates": "^0.2.0",
-        "@profullstack/coinpay-onboard": "0.3.1",
+        "@profullstack/coinpay-onboard": "^0.5.0",
         "@profullstack/footer": "latest",
         "@profullstack/leaderboard": "^0.3.1",
         "@profullstack/nichedb": "workspace:*",
@@ -367,7 +367,7 @@
 
     "@profullstack/coinpay": ["@profullstack/coinpay@0.25.0", "", { "dependencies": { "@inquirer/prompts": "^8.3.0", "@noble/curves": "^1.6.0", "@noble/hashes": "^1.5.0", "@profullstack/hqtui": "^0.6.3", "@scure/bip32": "^1.5.0", "@scure/bip39": "^1.4.0" }, "bin": { "coinpay": "bin/coinpay.js" } }, "sha512-ZoK8COqBCdJXvr0fO5UWw9HPh88CdMBLycc/dU6kXwAyeIrwZ4WkBApisuDgs4leXNN+SMjwex2etgrEvlICTQ=="],
 
-    "@profullstack/coinpay-onboard": ["@profullstack/coinpay-onboard@0.3.1", "", { "dependencies": { "@modelcontextprotocol/sdk": "^1.32.2", "zod": "^4.6.7" }, "bin": { "coinpay-onboard": "bin/coinpay-onboard" } }, "sha512-+K7D6uaX10y+0V5sg7To1jKwNG8iCNbN9SSW6q5ACzoiDNswMox3G7gzY/Swxd128klq7ecN2Ni4JVNr50nRIQ=="],
+    "@profullstack/coinpay-onboard": ["@profullstack/coinpay-onboard@0.5.0", "", { "dependencies": { "@modelcontextprotocol/sdk": "^1.32.2", "zod": "^4.6.7" }, "bin": { "coinpay-onboard": "bin/coinpay-onboard" } }, "sha512-yqSx3pgJLP521Km+XNNn9fyjbbHppgozuGTtzTln9yy+2I0h0bjqXSpsFPwoSgVb5QcyBx+Wzv5170Qb7va1iQ=="],
 
     "@profullstack/emailer": ["@profullstack/emailer@1.0.3", "", {}, "sha512-VyAtCcfnSI6LOwJvWogCr3ZNmEsaZw+iuWrqnosLsdcKsbRyCrCmXigMNZJZEjlgYlR+lK//PwNPG+xtCFvWAw=="],
 
diff --git a/packages/payments/package.json b/packages/payments/package.json
index 0bbdfe6..a3d6b38 100644
--- a/packages/payments/package.json
+++ b/packages/payments/package.json
@@ -6,7 +6,8 @@
   "exports": {
     ".": "./src/index.js",
     "./membership": "./src/membership.js",
-    "./referrals": "./src/referrals.js"
+    "./referrals": "./src/referrals.js",
+    "./coinpay-pass": "./src/coinpay-pass.js"
   },
   "dependencies": {
     "@profullstack/coinpay": "^0.25.0",
diff --git a/packages/payments/src/coinpay-pass.js b/packages/payments/src/coinpay-pass.js
new file mode 100644
index 0000000..2db6fd4
--- /dev/null
+++ b/packages/payments/src/coinpay-pass.js
@@ -0,0 +1,71 @@
+/**
+ * Profullstack Pass: a CoinPay user who deposited $99 into their own CoinPay
+ * wallet gets a free month on every Profullstack property
+ * (https://coinpayportal.com/pass).
+ *
+ * CoinPay reports the pass as a userinfo claim, which this site only sees at
+ * sign-in. The sign-in callback turns an active pass into a free Pro term from
+ * now until the pass expires: one `memberships` row, plan 'pro', price 0, keyed
+ * on grant_ref `coinpay-pass:<coinpay sub>:<expires_at>`. That row IS the
+ * persisted pass: isProUser / activeMembership already read the furthest-out
+ * Pro term, and a paid Pro term bought during the pass stacks after it.
+ *
+ * Idempotent on the (user_id, grant_ref) partial unique index: signing in ten
+ * times during one pass inserts one row. Never stacks on a Pro term the member
+ * already holds: the pass is "Pro until it expires". Data dumps are not part
+ * of it.
+ */
+
+export const PASS_URL = 'https://coinpayportal.com/pass';
+export const PASS_GRANT_PREFIX = 'coinpay-pass';
+export const PASS_PLAN = 'pro';
+
+/**
+ * Active only when `active === true` AND the expiry parses to a future date.
+ * Accepts the raw claim (`{ active, expires_at }`) or the parsed one
+ * coinpay-onboard finishSignIn returns (`{ active, expiresAt: Date }`).
+ */
+export function normalizePass(pass, now = new Date()) {
+  if (!pass || typeof pass !== 'object') return { active: false, expiresAt: null };
+  const raw = pass.expiresAt ?? pass.expires_at ?? null;
+  const parsed =
+    raw instanceof Date ? raw : typeof raw === 'string' && raw.trim() ? new Date(raw) : null;
+  const expiresAt = parsed && Number.isFinite(parsed.getTime()) ? parsed : null;
+  const active = pass.active === true && expiresAt !== null && expiresAt.getTime() > now.getTime();
+  return { active, expiresAt };
+}
+
+export function passGrantRef(sub, expiresAt) {
+  return `${PASS_GRANT_PREFIX}:${sub}:${expiresAt.toISOString()}`;
+}
+
+/**
+ * Grant Pro until the pass expires, once per pass.
+ *
+ * @param {(text: string, params: unknown[]) => Promise<object[]>} run
+ * @returns {Promise<null | { expires_at: unknown, replayed: boolean }>}
+ */
+export async function grantCoinpayPass(
+  run,
+  { userId, sub, pass, now = new Date(), currency = 'USD' },
+) {
+  if (!userId || !sub) return null;
+  const p = normalizePass(pass, now);
+  if (!p.active) return null;
+  const ref = passGrantRef(sub, p.expiresAt);
+  const exp = p.expiresAt.toISOString();
+  const [row] = await run(
+    `insert into memberships (user_id, payment_id, started_at, expires_at, price_cents, currency, plan, grant_ref)
+     select $1::uuid, null, now(), $2::timestamptz, 0, $3, $4, $5
+     where $2::timestamptz > now()
+     on conflict do nothing
+     returning expires_at`,
+    [userId, exp, currency, PASS_PLAN, ref],
+  );
+  if (row) return { ...row, replayed: false };
+  const [existing] = await run(
+    'select expires_at from memberships where user_id = $1::uuid and grant_ref = $2',
+    [userId, ref],
+  );
+  return existing ? { ...existing, replayed: true } : null;
+}