From eb4705c27b7c7af9209ee9d25e6b68c6dbce84ae Mon Sep 17 00:00:00 2001
From: Cesare Naldi <3353250+cesarenaldi@users.noreply.github.com>
Date: Fri, 5 Jun 2026 21:13:18 +0200
Subject: [PATCH 1/2] fix(client): accept copied event market URLs

---
 .changeset/dev-168-market-event-url.md            |  5 +++++
 packages/client/src/actions/markets.ts            |  2 +-
 packages/client/src/decorators/discovery.ts       |  2 +-
 packages/client/src/polymarket-url.ts             | 11 +++++++++++
 packages/client/tests/integration/markets.test.ts |  2 +-
 5 files changed, 19 insertions(+), 3 deletions(-)
 create mode 100644 .changeset/dev-168-market-event-url.md

diff --git a/.changeset/dev-168-market-event-url.md b/.changeset/dev-168-market-event-url.md
new file mode 100644
index 0000000..0342ac7
--- /dev/null
+++ b/.changeset/dev-168-market-event-url.md
@@ -0,0 +1,5 @@
+---
+"@polymarket/client": patch
+---
+
+Accept copied market URLs in the current `/event/{eventSlug}/{marketSlug}` shape when fetching markets by URL.
diff --git a/packages/client/src/actions/markets.ts b/packages/client/src/actions/markets.ts
index eaedc67..f765eb9 100644
--- a/packages/client/src/actions/markets.ts
+++ b/packages/client/src/actions/markets.ts
@@ -266,7 +266,7 @@ export const FetchMarketError = makeErrorGuard(
  * });
  *
  * const marketByUrl = await fetchMarket(client, {
- *   url: 'https://polymarket.com/market/some-market-slug',
+ *   url: 'https://polymarket.com/event/some-event-slug/some-market-slug',
  * });
  *
  * // market === Market
diff --git a/packages/client/src/decorators/discovery.ts b/packages/client/src/decorators/discovery.ts
index 0dac117..d1f989b 100644
--- a/packages/client/src/decorators/discovery.ts
+++ b/packages/client/src/decorators/discovery.ts
@@ -189,7 +189,7 @@ export type DiscoveryActions = {
    * });
    *
    * const marketByUrl = await client.fetchMarket({
-   *   url: 'https://polymarket.com/market/some-market-slug',
+   *   url: 'https://polymarket.com/event/some-event-slug/some-market-slug',
    * });
    * ```
    */
diff --git a/packages/client/src/polymarket-url.ts b/packages/client/src/polymarket-url.ts
index c1df836..7c14383 100644
--- a/packages/client/src/polymarket-url.ts
+++ b/packages/client/src/polymarket-url.ts
@@ -24,6 +24,17 @@ export function parsePolymarketSlugUrl(
   const [actualResource, slug, ...extraSegments] = url.pathname
     .split('/')
     .filter(Boolean);
+  const marketSlug = extraSegments[0];
+
+  if (
+    resource === 'market' &&
+    actualResource === 'event' &&
+    slug !== undefined &&
+    marketSlug !== undefined &&
+    extraSegments.length === 1
+  ) {
+    return marketSlug;
+  }
 
   if (
     actualResource !== resource ||
diff --git a/packages/client/tests/integration/markets.test.ts b/packages/client/tests/integration/markets.test.ts
index d284f24..d79f79c 100644
--- a/packages/client/tests/integration/markets.test.ts
+++ b/packages/client/tests/integration/markets.test.ts
@@ -58,7 +58,7 @@ describe('Markets', () => {
 
     it('fetches a market by URL', async ({ publicClient }) => {
       const marketByUrl = await publicClient.fetchMarket({
-        url: `https://polymarket.com/market/${expectPresent(market.slug)}`,
+        url: `https://polymarket.com/event/some-event-slug/${expectPresent(market.slug)}`,
       });
 
       expect(marketByUrl.id).toBe(market.id);

From a75a6fd0a15b11a7a079dd70fac3f63eb1ca2789 Mon Sep 17 00:00:00 2001
From: Cesare Naldi <3353250+cesarenaldi@users.noreply.github.com>
Date: Fri, 5 Jun 2026 21:46:04 +0200
Subject: [PATCH 2/2] fix(client): support event slug market urls

---
 .changeset/dev-168-market-event-url.md            | 2 +-
 packages/client/src/actions/markets.ts            | 2 +-
 packages/client/src/decorators/discovery.ts       | 2 +-
 packages/client/src/polymarket-url.ts             | 5 ++---
 packages/client/tests/integration/markets.test.ts | 4 ++--
 5 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/.changeset/dev-168-market-event-url.md b/.changeset/dev-168-market-event-url.md
index 0342ac7..38f1317 100644
--- a/.changeset/dev-168-market-event-url.md
+++ b/.changeset/dev-168-market-event-url.md
@@ -2,4 +2,4 @@
 "@polymarket/client": patch
 ---
 
-Accept copied market URLs in the current `/event/{eventSlug}/{marketSlug}` shape when fetching markets by URL.
+Accept copied `/event/{slug}` market URLs when fetching markets by URL.
diff --git a/packages/client/src/actions/markets.ts b/packages/client/src/actions/markets.ts
index f765eb9..0c1f80f 100644
--- a/packages/client/src/actions/markets.ts
+++ b/packages/client/src/actions/markets.ts
@@ -266,7 +266,7 @@ export const FetchMarketError = makeErrorGuard(
  * });
  *
  * const marketByUrl = await fetchMarket(client, {
- *   url: 'https://polymarket.com/event/some-event-slug/some-market-slug',
+ *   url: 'https://polymarket.com/event/some-market-slug',
  * });
  *
  * // market === Market
diff --git a/packages/client/src/decorators/discovery.ts b/packages/client/src/decorators/discovery.ts
index d1f989b..fa30392 100644
--- a/packages/client/src/decorators/discovery.ts
+++ b/packages/client/src/decorators/discovery.ts
@@ -189,7 +189,7 @@ export type DiscoveryActions = {
    * });
    *
    * const marketByUrl = await client.fetchMarket({
-   *   url: 'https://polymarket.com/event/some-event-slug/some-market-slug',
+   *   url: 'https://polymarket.com/event/some-market-slug',
    * });
    * ```
    */
diff --git a/packages/client/src/polymarket-url.ts b/packages/client/src/polymarket-url.ts
index 7c14383..21b4a5a 100644
--- a/packages/client/src/polymarket-url.ts
+++ b/packages/client/src/polymarket-url.ts
@@ -30,10 +30,9 @@ export function parsePolymarketSlugUrl(
     resource === 'market' &&
     actualResource === 'event' &&
     slug !== undefined &&
-    marketSlug !== undefined &&
-    extraSegments.length === 1
+    extraSegments.length <= 1
   ) {
-    return marketSlug;
+    return marketSlug ?? slug;
   }
 
   if (
diff --git a/packages/client/tests/integration/markets.test.ts b/packages/client/tests/integration/markets.test.ts
index d79f79c..a2d6571 100644
--- a/packages/client/tests/integration/markets.test.ts
+++ b/packages/client/tests/integration/markets.test.ts
@@ -58,7 +58,7 @@ describe('Markets', () => {
 
     it('fetches a market by URL', async ({ publicClient }) => {
       const marketByUrl = await publicClient.fetchMarket({
-        url: `https://polymarket.com/event/some-event-slug/${expectPresent(market.slug)}`,
+        url: `https://polymarket.com/event/${expectPresent(market.slug)}`,
       });
 
       expect(marketByUrl.id).toBe(market.id);
@@ -79,7 +79,7 @@ describe('Markets', () => {
 
       await expect(
         publicClient.fetchMarket({
-          url: 'https://polymarket.com/event/presidential-election-2028',
+          url: 'https://polymarket.com/tag/politics',
         }),
       ).rejects.toThrow(UserInputError);
     });