diff --git a/core/src/exchanges/gemini-titan/index.ts b/core/src/exchanges/gemini-titan/index.ts
index 1fa4336c..abf55dca 100644
--- a/core/src/exchanges/gemini-titan/index.ts
+++ b/core/src/exchanges/gemini-titan/index.ts
@@ -172,7 +172,7 @@ export class GeminiTitanExchange extends PredictionMarketExchange {
                 side: 'buy',
                 type: 'limit',
                 amount: 0,
-                status: 'cancelled',
+                status: 'canceled',
                 filled: 0,
                 remaining: 0,
                 timestamp: Date.now(),
diff --git a/core/src/exchanges/gemini-titan/normalizer.ts b/core/src/exchanges/gemini-titan/normalizer.ts
index bccbcb87..c92c1276 100644
--- a/core/src/exchanges/gemini-titan/normalizer.ts
+++ b/core/src/exchanges/gemini-titan/normalizer.ts
@@ -39,8 +39,8 @@ function mapOrderStatus(geminiStatus: string): Order['status'] {
         case 'open': return 'open';
         case 'accepted': return 'open';
         case 'filled': return 'filled';
-        case 'cancelled': return 'cancelled';
-        case 'canceled': return 'cancelled';
+        case 'cancelled': return 'canceled';
+        case 'canceled': return 'canceled';
         case 'rejected': return 'rejected';
         default: return 'open';
     }
diff --git a/core/src/exchanges/hyperliquid/index.ts b/core/src/exchanges/hyperliquid/index.ts
index 665968f4..54814288 100644
--- a/core/src/exchanges/hyperliquid/index.ts
+++ b/core/src/exchanges/hyperliquid/index.ts
@@ -288,7 +288,7 @@ export class HyperliquidExchange extends PredictionMarketExchange {
                 side: 'buy',
                 type: 'limit',
                 amount: 0,
-                status: 'cancelled',
+                status: 'canceled',
                 filled: 0,
                 remaining: 0,
                 timestamp: Date.now(),
diff --git a/core/src/exchanges/kalshi/index.ts b/core/src/exchanges/kalshi/index.ts
index 450eef35..f8c09144 100644
--- a/core/src/exchanges/kalshi/index.ts
+++ b/core/src/exchanges/kalshi/index.ts
@@ -352,7 +352,7 @@ export class KalshiExchange extends PredictionMarketExchange {
             side: order.side === 'yes' ? 'buy' : 'sell',
             type: 'limit',
             amount: order.count,
-            status: 'cancelled',
+            status: 'canceled',
             filled: order.count - (order.remaining_count || 0),
             remaining: 0,
             timestamp: new Date(order.created_time).getTime(),
diff --git a/core/src/exchanges/kalshi/normalizer.ts b/core/src/exchanges/kalshi/normalizer.ts
index eaf23f82..74a2a2c1 100644
--- a/core/src/exchanges/kalshi/normalizer.ts
+++ b/core/src/exchanges/kalshi/normalizer.ts
@@ -275,11 +275,11 @@ export class KalshiNormalizer implements IExchangeNormalizer<KalshiRawEvent, Kal
 
     // -- Helpers ---------------------------------------------------------------
 
-    private mapOrderStatus(status: string | undefined): 'pending' | 'open' | 'filled' | 'cancelled' | 'rejected' {
+    private mapOrderStatus(status: string | undefined): 'pending' | 'open' | 'filled' | 'canceled' | 'rejected' {
         switch ((status ?? '').toLowerCase()) {
             case 'resting': return 'open';
             case 'canceled':
-            case 'cancelled': return 'cancelled';
+            case 'cancelled': return 'canceled';
             case 'executed':
             case 'filled': return 'filled';
             default: return 'open';
diff --git a/core/src/exchanges/limitless/index.ts b/core/src/exchanges/limitless/index.ts
index 7b337e28..f081d575 100644
--- a/core/src/exchanges/limitless/index.ts
+++ b/core/src/exchanges/limitless/index.ts
@@ -355,7 +355,7 @@ export class LimitlessExchange extends PredictionMarketExchange {
                 side: 'buy',
                 type: 'limit',
                 amount: 0,
-                status: 'cancelled',
+                status: 'canceled',
                 filled: 0,
                 remaining: 0,
                 timestamp: Date.now(),
diff --git a/core/src/exchanges/metaculus/cancelOrder.ts b/core/src/exchanges/metaculus/cancelOrder.ts
index 2b1e1e0f..ca30e0d8 100644
--- a/core/src/exchanges/metaculus/cancelOrder.ts
+++ b/core/src/exchanges/metaculus/cancelOrder.ts
@@ -36,7 +36,7 @@ export interface CancelOrderContext {
  *
  * @param orderId  The Metaculus question ID to withdraw the forecast from.
  * @param ctx      HTTP client and auth context.
- * @returns A synthetic Order with status "cancelled".
+ * @returns A synthetic Order with status "canceled".
  *
  * @throws {AuthenticationError} If no API token is configured.
  * @throws {ValidationError} If the orderId is not a valid numeric question ID.
@@ -75,7 +75,7 @@ export async function cancelOrder(
             headers: { "Content-Type": "application/json", ...headers },
         });
 
-        // 4. Return synthetic cancelled order
+        // 4. Return synthetic canceled order
         return {
             id: `mc-withdraw-${questionId}-${Date.now()}`,
             marketId: orderId,
@@ -83,7 +83,7 @@ export async function cancelOrder(
             side: "buy",
             type: "market",
             amount: 1,
-            status: "cancelled",
+            status: "canceled",
             filled: 0,
             remaining: 0,
             timestamp: Date.now(),
diff --git a/core/src/exchanges/metaculus/createOrder.ts b/core/src/exchanges/metaculus/createOrder.ts
index 7f368572..b5930d0e 100644
--- a/core/src/exchanges/metaculus/createOrder.ts
+++ b/core/src/exchanges/metaculus/createOrder.ts
@@ -208,7 +208,7 @@ export function redistributeProbabilities(
  */
 function buildSyntheticOrder(
     params: CreateOrderParams,
-    status: "filled" | "cancelled",
+    status: "filled" | "canceled",
 ): Order {
     return {
         id: `mc-${params.marketId}-${Date.now()}`,
diff --git a/core/src/exchanges/mock/index.ts b/core/src/exchanges/mock/index.ts
index edefef25..d7379313 100644
--- a/core/src/exchanges/mock/index.ts
+++ b/core/src/exchanges/mock/index.ts
@@ -631,7 +631,7 @@ export class MockExchange extends PredictionMarketExchange {
             this._freeCash += rest;
             this._lockedByBuy.delete(orderId);
         }
-        const u: Order = { ...current, status: 'cancelled', remaining: 0, timestamp: Date.now() };
+        const u: Order = { ...current, status: 'canceled', remaining: 0, timestamp: Date.now() };
         this._orders.set(orderId, u);
         return { ...u };
     }
@@ -656,7 +656,7 @@ export class MockExchange extends PredictionMarketExchange {
 
     override async fetchClosedOrders(): Promise<Order[]> {
         return Array.from(this._orders.values())
-            .filter(o => o.status === 'filled' || o.status === 'cancelled' || o.status === 'rejected')
+            .filter(o => o.status === 'filled' || o.status === 'canceled' || o.status === 'rejected')
             .map(o => ({ ...o }));
     }
 
diff --git a/core/src/exchanges/opinion/index.ts b/core/src/exchanges/opinion/index.ts
index 1f24dad9..97941042 100644
--- a/core/src/exchanges/opinion/index.ts
+++ b/core/src/exchanges/opinion/index.ts
@@ -376,7 +376,7 @@ export class OpinionExchange extends PredictionMarketExchange {
                 side: 'buy',
                 type: 'limit',
                 amount: 0,
-                status: 'cancelled',
+                status: 'canceled',
                 filled: 0,
                 remaining: 0,
                 timestamp: Date.now(),
diff --git a/core/src/exchanges/opinion/utils.ts b/core/src/exchanges/opinion/utils.ts
index 5425b554..07868d4c 100644
--- a/core/src/exchanges/opinion/utils.ts
+++ b/core/src/exchanges/opinion/utils.ts
@@ -54,12 +54,12 @@ export function mapIntervalToOpinion(interval: CandleInterval): string {
 }
 
 // Map Opinion order status code to pmxt status string
-export function mapOrderStatus(status: number): 'pending' | 'open' | 'filled' | 'cancelled' | 'rejected' {
+export function mapOrderStatus(status: number): 'pending' | 'open' | 'filled' | 'canceled' | 'rejected' {
     switch (status) {
         case OPINION_ORDER_STATUS.PENDING: return 'pending';
         case OPINION_ORDER_STATUS.FILLED: return 'filled';
-        case OPINION_ORDER_STATUS.CANCELED: return 'cancelled';
-        case OPINION_ORDER_STATUS.EXPIRED: return 'cancelled'; // expired -> cancelled
+        case OPINION_ORDER_STATUS.CANCELED: return 'canceled';
+        case OPINION_ORDER_STATUS.EXPIRED: return 'canceled'; // expired -> canceled
         case OPINION_ORDER_STATUS.FAILED: return 'rejected';   // failed -> rejected
         default: return 'pending';
     }
diff --git a/core/src/exchanges/polymarket/index.ts b/core/src/exchanges/polymarket/index.ts
index 02e555ef..8e70e09d 100644
--- a/core/src/exchanges/polymarket/index.ts
+++ b/core/src/exchanges/polymarket/index.ts
@@ -330,7 +330,7 @@ export class PolymarketExchange extends PredictionMarketExchange {
                 side: 'buy',
                 type: 'limit',
                 amount: 0,
-                status: 'cancelled',
+                status: 'canceled',
                 filled: 0,
                 remaining: 0,
                 timestamp: Date.now(),
diff --git a/core/src/exchanges/polymarket_us/normalizer.ts b/core/src/exchanges/polymarket_us/normalizer.ts
index baa417f0..9c7dad69 100644
--- a/core/src/exchanges/polymarket_us/normalizer.ts
+++ b/core/src/exchanges/polymarket_us/normalizer.ts
@@ -254,15 +254,15 @@ function mapOrderType(type: OrderType): 'market' | 'limit' {
     return type === 'ORDER_TYPE_MARKET' ? 'market' : 'limit';
 }
 
-// PMXT Order.status values: 'pending' | 'open' | 'filled' | 'cancelled' | 'rejected'
-// Note: PMXT has no 'expired' status; expired orders are mapped to 'cancelled'.
-function mapOrderStatus(state: OrderState): 'pending' | 'open' | 'filled' | 'cancelled' | 'rejected' {
+// PMXT Order.status values: 'pending' | 'open' | 'filled' | 'canceled' | 'rejected'
+// Note: PMXT has no 'expired' status; expired orders are mapped to 'canceled'.
+function mapOrderStatus(state: OrderState): 'pending' | 'open' | 'filled' | 'canceled' | 'rejected' {
     switch (state) {
         case 'ORDER_STATE_FILLED':
             return 'filled';
         case 'ORDER_STATE_CANCELED':
         case 'ORDER_STATE_EXPIRED':
-            return 'cancelled';
+            return 'canceled';
         case 'ORDER_STATE_REJECTED':
             return 'rejected';
         case 'ORDER_STATE_NEW':
diff --git a/core/src/exchanges/probable/index.ts b/core/src/exchanges/probable/index.ts
index 882cf421..e2ddfd5c 100644
--- a/core/src/exchanges/probable/index.ts
+++ b/core/src/exchanges/probable/index.ts
@@ -309,7 +309,7 @@ export class ProbableExchange extends PredictionMarketExchange {
                 side: 'buy',
                 type: 'limit',
                 amount: 0,
-                status: 'cancelled',
+                status: 'canceled',
                 filled: 0,
                 remaining: 0,
                 timestamp: Date.now(),
@@ -490,12 +490,12 @@ function parseCompoundId(compoundId: string): [string, string | undefined] {
     return [compoundId.substring(0, colonIndex), compoundId.substring(colonIndex + 1)];
 }
 
-function mapOrderStatus(status: string): 'pending' | 'open' | 'filled' | 'cancelled' | 'rejected' {
+function mapOrderStatus(status: string): 'pending' | 'open' | 'filled' | 'canceled' | 'rejected' {
     if (!status) return 'open';
     const lower = status.toLowerCase();
     if (lower === 'new' || lower === 'open' || lower === 'partially_filled') return 'open';
     if (lower === 'filled' || lower === 'trade') return 'filled';
-    if (lower === 'canceled' || lower === 'cancelled' || lower === 'expired') return 'cancelled';
+    if (lower === 'canceled' || lower === 'cancelled' || lower === 'expired') return 'canceled';
     if (lower === 'rejected') return 'rejected';
     return 'open';
 }
diff --git a/core/src/exchanges/smarkets/normalizer.ts b/core/src/exchanges/smarkets/normalizer.ts
index d9871615..c578364a 100644
--- a/core/src/exchanges/smarkets/normalizer.ts
+++ b/core/src/exchanges/smarkets/normalizer.ts
@@ -232,7 +232,7 @@ export class SmarketsNormalizer implements IExchangeNormalizer<SmarketsRawEventW
         const availableQty = raw.available_quantity || 0;
         const quantity = raw.quantity || (totalExecuted + availableQty);
 
-        let status: 'pending' | 'open' | 'filled' | 'cancelled' | 'rejected' = 'open';
+        let status: 'pending' | 'open' | 'filled' | 'canceled' | 'rejected' = 'open';
         if (totalExecuted > 0 && availableQty === 0) {
             status = 'filled';
         } else if (totalExecuted > 0) {
@@ -287,7 +287,7 @@ export class SmarketsNormalizer implements IExchangeNormalizer<SmarketsRawEventW
 
     // -- Private helpers ------------------------------------------------------
 
-    private mapOrderStatus(state: string): 'pending' | 'open' | 'filled' | 'cancelled' | 'rejected' {
+    private mapOrderStatus(state: string): 'pending' | 'open' | 'filled' | 'canceled' | 'rejected' {
         switch (state) {
             case 'created':
                 return 'pending';
diff --git a/core/src/server/openapi.yaml b/core/src/server/openapi.yaml
index 3dbeb7c0..e00e81e6 100644
--- a/core/src/server/openapi.yaml
+++ b/core/src/server/openapi.yaml
@@ -3164,7 +3164,7 @@ components:
             - pending
             - open
             - filled
-            - cancelled
+            - canceled
             - rejected
           description: Lifecycle status of the order.
         filled:
diff --git a/core/src/types.ts b/core/src/types.ts
index 78091e45..49d13870 100644
--- a/core/src/types.ts
+++ b/core/src/types.ts
@@ -190,7 +190,7 @@ export interface Order {
     price?: number;  // For limit orders
     amount: number;  // Size in contracts/shares
     /** Lifecycle status of the order. */
-    status: 'pending' | 'open' | 'filled' | 'cancelled' | 'rejected';
+    status: 'pending' | 'open' | 'filled' | 'canceled' | 'rejected';
     filled: number;  // Amount filled (USDC cost for buys, shares for sells)
     /** Amount filled in shares/contracts (if different from USDC-denominated `filled`). */
     filledShares?: number;
diff --git a/core/test/pipeline/order-lifecycle.test.ts b/core/test/pipeline/order-lifecycle.test.ts
index 55dcd2f9..887e35f5 100644
--- a/core/test/pipeline/order-lifecycle.test.ts
+++ b/core/test/pipeline/order-lifecycle.test.ts
@@ -375,7 +375,7 @@ describe('Partial fill', () => {
 // ---------------------------------------------------------------------------
 
 describe('Cancel', () => {
-    it('cancelling an open resting order sets status to cancelled', async () => {
+    it('cancelling an open resting order sets status to canceled', async () => {
         const ex = makeExchange({ limitOrderMode: 'resting' });
         const order = await ex.createOrder({
             marketId: MARKET_ID,
@@ -386,8 +386,8 @@ describe('Cancel', () => {
             amount: 10,
         });
 
-        const cancelled = await ex.cancelOrder(order.id);
-        expect(cancelled.status).toBe('cancelled');
+        const canceled = await ex.cancelOrder(order.id);
+        expect(canceled.status).toBe('canceled');
     });
 
     it('cancelling returns locked funds to available', async () => {
@@ -903,7 +903,7 @@ describe('Order query methods', () => {
         expect(open.some(o => o.id === orderB.id)).toBe(true);
     });
 
-    it('fetchClosedOrders returns filled and cancelled orders', async () => {
+    it('fetchClosedOrders returns filled and canceled orders', async () => {
         const ex = makeExchange({ limitOrderMode: 'resting', balance: 1000 });
 
         const orderA = await ex.createOrder({
diff --git a/docs/api-reference/openapi.json b/docs/api-reference/openapi.json
index 72d2d4d8..91bc091c 100644
--- a/docs/api-reference/openapi.json
+++ b/docs/api-reference/openapi.json
@@ -10307,7 +10307,7 @@
               "pending",
               "open",
               "filled",
-              "cancelled",
+              "canceled",
               "rejected"
             ],
             "description": "Lifecycle status of the order."
diff --git a/sdks/python/pmxt/models.py b/sdks/python/pmxt/models.py
index 1a7f8b16..45f07229 100644
--- a/sdks/python/pmxt/models.py
+++ b/sdks/python/pmxt/models.py
@@ -364,7 +364,7 @@ class PaginatedEventsResult:
 
 @dataclass
 class Order:
-    """An order (open, filled, or cancelled)."""
+    """An order (open, filled, or canceled)."""
     
     id: str
     """Order ID"""
@@ -385,7 +385,7 @@ class Order:
     """Order amount (contracts)"""
     
     status: str
-    """Order status (pending, open, filled, cancelled, rejected)"""
+    """Order status (pending, open, filled, canceled, rejected)"""
     
     filled: float
     """Amount filled"""
diff --git a/sdks/python/tests/test_converters.py b/sdks/python/tests/test_converters.py
index 06ee22d4..70090757 100644
--- a/sdks/python/tests/test_converters.py
+++ b/sdks/python/tests/test_converters.py
@@ -896,7 +896,7 @@ def test_distinct_field_values(self):
             "side": "buy",
             "type": "limit",
             "amount": 111.0,
-            "status": "cancelled",
+            "status": "canceled",
             "filled": 22.0,
             "remaining": 89.0,
             "timestamp": 3333333333333,
@@ -910,7 +910,7 @@ def test_distinct_field_values(self):
         assert order.side == "buy"
         assert order.type == "limit"
         assert order.amount == 111.0
-        assert order.status == "cancelled"
+        assert order.status == "canceled"
         assert order.filled == 22.0
         assert order.remaining == 89.0
         assert order.timestamp == 3333333333333
diff --git a/sdks/typescript/pmxt/models.ts b/sdks/typescript/pmxt/models.ts
index 8d7bbaee..4e0b08aa 100644
--- a/sdks/typescript/pmxt/models.ts
+++ b/sdks/typescript/pmxt/models.ts
@@ -271,7 +271,7 @@ export interface Trade {
 }
 
 /**
- * An order (open, filled, or cancelled).
+ * An order (open, filled, or canceled).
  */
 export interface Order {
     /** Order ID */