diff --git a/lib/airdrop/points.ts b/lib/airdrop/points.ts
new file mode 100644
index 00000000..1f08ae8f
--- /dev/null
+++ b/lib/airdrop/points.ts
@@ -0,0 +1,50 @@
+/**
+ * Airdrop points helpers (#881)
+ *
+ * Computes buy points with streak boost, and referral points.
+ */
+
+import { AIRDROP_CONFIG } from "./config";
+
+/**
+ * Look up the streak boost multiplier for a given streak length.
+ * Returns the highest qualifying boost (e.g. streak=15 → 0.10 for the 14-day tier).
+ */
+export function getStreakBoost(currentStreak: number): number {
+  const thresholds = Object.keys(AIRDROP_CONFIG.STREAK_BOOSTS)
+    .map(Number)
+    .sort((a, b) => b - a); // descending
+
+  for (const threshold of thresholds) {
+    if (currentStreak >= threshold) {
+      return AIRDROP_CONFIG.STREAK_BOOSTS[threshold];
+    }
+  }
+  return 0;
+}
+
+/**
+ * Compute buy points for a trade.
+ * Points = PLOT spent × BUY_PER_PLOT × (1 + streak boost)
+ */
+export function computeBuyPoints(
+  plotSpent: number,
+  currentStreak: number,
+): number {
+  const base = plotSpent * AIRDROP_CONFIG.POINTS.BUY_PER_PLOT;
+  const boost = getStreakBoost(currentStreak);
+  return base * (1 + boost);
+}
+
+/**
+ * Compute referral points (percentage of buyer's boosted buy points).
+ * Also boosted by the referrer's own streak.
+ */
+export function computeReferralPoints(
+  buyerBoostedPoints: number,
+  referrerStreak: number,
+): number {
+  const base = buyerBoostedPoints * (AIRDROP_CONFIG.POINTS.REFERRAL_PCT / 100);
+  const boost = getStreakBoost(referrerStreak);
+  return base * (1 + boost);
+}
diff --git a/src/app/api/cron/airdrop-points/route.ts b/src/app/api/cron/airdrop-points/route.ts
new file mode 100644
index 00000000..f28775ce
--- /dev/null
+++ b/src/app/api/cron/airdrop-points/route.ts
@@ -0,0 +1,173 @@
+/**
+ * Airdrop buy-points sync cron (#881)
+ *
+ * Syncs trade_history mint events → pl_points for buy + referral points.
+ * Schedule: every 5 min
+ */
+
+import { NextResponse } from "next/server";
+import { createServerClient } from "../../../../../lib/supabase";
+import { ZAP_PLOTLINK } from "../../../../../lib/contracts/constants";
+import { AIRDROP_CONFIG } from "../../../../../lib/airdrop/config";
+import { computeBuyPoints, computeReferralPoints } from "../../../../../lib/airdrop/points";
+
+/** Fail closed in production when CRON_SECRET is unset */
+function verifyCron(req: Request): boolean {
+  const secret = process.env.CRON_SECRET;
+  if (!secret) {
+    return process.env.NODE_ENV !== "production";
+  }
+  const authHeader = req.headers.get("authorization");
+  return authHeader === `Bearer ${secret}`;
+}
+
+export async function POST(req: Request) {
+  if (!verifyCron(req)) {
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+  }
+
+  const supabase = createServerClient();
+  if (!supabase) {
+    return NextResponse.json({ error: "Supabase not configured" }, { status: 500 });
+  }
+
+  const now = new Date();
+  if (now > AIRDROP_CONFIG.CAMPAIGN_END) {
+    return NextResponse.json({ message: "Campaign ended, no points awarded" });
+  }
+
+  const zapAddress = ZAP_PLOTLINK.toLowerCase();
+
+  // Fetch mint trades within the campaign window
+  const { data: trades, error: tradesErr } = await supabase
+    .from("trade_history")
+    .select("id, user_address, reserve_amount, block_timestamp")
+    .eq("event_type", "mint")
+    .gte("block_timestamp", AIRDROP_CONFIG.CAMPAIGN_START.toISOString())
+    .lte("block_timestamp", AIRDROP_CONFIG.CAMPAIGN_END.toISOString())
+    .not("user_address", "is", null);
+
+  if (tradesErr) {
+    console.error("[airdrop-points] Failed to fetch trades:", tradesErr.message);
+    return NextResponse.json({ error: "Failed to fetch trades" }, { status: 500 });
+  }
+
+  if (!trades || trades.length === 0) {
+    return NextResponse.json({ message: "No trades to process", processed: 0 });
+  }
+
+  // Filter out ZAP_PLOTLINK self-mints
+  const eligible = trades.filter(
+    (t) => t.user_address && t.user_address.toLowerCase() !== zapAddress,
+  );
+
+  // Fetch existing trade_ids from pl_points to dedup
+  const tradeIds = eligible.map((t) => t.id);
+  const { data: existing } = await supabase
+    .from("pl_points")
+    .select("metadata")
+    .eq("action", "buy")
+    .in("metadata->>trade_id", tradeIds.map(String));
+
+  const processedTradeIds = new Set(
+    (existing ?? [])
+      .map((r) => {
+        const meta = r.metadata as Record<string, unknown> | null;
+        return meta?.trade_id != null ? String(meta.trade_id) : null;
+      })
+      .filter(Boolean),
+  );
+
+  // Collect unique buyer addresses for streak lookup
+  const buyerAddresses = [
+    ...new Set(eligible.filter((t) => !processedTradeIds.has(String(t.id))).map((t) => t.user_address!.toLowerCase())),
+  ];
+
+  // Batch-fetch streaks
+  const { data: streaks } = await supabase
+    .from("pl_streaks")
+    .select("address, current_streak")
+    .in("address", buyerAddresses);
+
+  const streakMap = new Map(
+    (streaks ?? []).map((s) => [s.address.toLowerCase(), s.current_streak]),
+  );
+
+  // Batch-fetch referrals for buyers
+  const { data: referrals } = await supabase
+    .from("pl_referrals")
+    .select("referred_address, referrer_address")
+    .in("referred_address", buyerAddresses);
+
+  const referralMap = new Map(
+    (referrals ?? []).map((r) => [r.referred_address.toLowerCase(), r.referrer_address.toLowerCase()]),
+  );
+
+  // Collect referrer addresses for streak lookup
+  const referrerAddresses = [...new Set(referralMap.values())];
+  const { data: referrerStreaks } = referrerAddresses.length > 0
+    ? await supabase
+        .from("pl_streaks")
+        .select("address, current_streak")
+        .in("address", referrerAddresses)
+    : { data: [] };
+
+  const referrerStreakMap = new Map(
+    (referrerStreaks ?? []).map((s) => [s.address.toLowerCase(), s.current_streak]),
+  );
+
+  let buyCount = 0;
+  let referralCount = 0;
+  const inserts: Array<{
+    address: string;
+    action: string;
+    points: number;
+    metadata: Record<string, unknown>;
+  }> = [];
+
+  for (const trade of eligible) {
+    if (processedTradeIds.has(String(trade.id))) continue;
+
+    const address = trade.user_address!.toLowerCase();
+    const plotSpent = trade.reserve_amount;
+    const buyerStreak = streakMap.get(address) ?? 0;
+
+    // Buy points
+    const buyPoints = computeBuyPoints(plotSpent, buyerStreak);
+    inserts.push({
+      address,
+      action: "buy",
+      points: buyPoints,
+      metadata: { trade_id: trade.id },
+    });
+    buyCount++;
+
+    // Referral points
+    const referrer = referralMap.get(address);
+    if (referrer) {
+      const referrerStreak = referrerStreakMap.get(referrer) ?? 0;
+      const refPoints = computeReferralPoints(buyPoints, referrerStreak);
+      inserts.push({
+        address: referrer,
+        action: "referral",
+        points: refPoints,
+        metadata: { trade_id: trade.id, referred_address: address },
+      });
+      referralCount++;
+    }
+  }
+
+  if (inserts.length > 0) {
+    const { error: insertErr } = await supabase.from("pl_points").insert(inserts);
+    if (insertErr) {
+      console.error("[airdrop-points] Insert failed:", insertErr.message);
+      return NextResponse.json({ error: "Insert failed" }, { status: 500 });
+    }
+  }
+
+  console.info(`[airdrop-points] Processed ${buyCount} buys, ${referralCount} referrals`);
+  return NextResponse.json({
+    message: "Points synced",
+    processed: { buys: buyCount, referrals: referralCount },
+  });
+}