Trim trailing slashes on passed API and web URLs

js/src/client.ts

@@ -439,8 +439,14 @@ export class Client {
 
     this.tracingSampleRate = getTracingSamplingRate();
     this.apiUrl = trimQuotes(config.apiUrl ?? defaultConfig.apiUrl) ?? "";
+    if (this.apiUrl.endsWith("/")) {
+      this.apiUrl = this.apiUrl.slice(0, -1);
+    }
     this.apiKey = trimQuotes(config.apiKey ?? defaultConfig.apiKey);
     this.webUrl = trimQuotes(config.webUrl ?? defaultConfig.webUrl);
+    if (this.webUrl?.endsWith("/")) {
+      this.webUrl = this.webUrl.slice(0, -1);
+    }
     this.timeout_ms = config.timeout_ms ?? 12_000;
     this.caller = new AsyncCaller(config.callerOptions ?? {});
     this.batchIngestCaller = new AsyncCaller({

js/src/tests/client.test.ts

@@ -85,6 +85,12 @@ describe("Client", () => {
     });
   });
 
+  it("should trim trailing slash on a passed apiUrl", () => {
+    const client = new Client({ apiUrl: "https://example.com/" });
+    const result = (client as any).apiUrl;
+    expect(result).toBe("https://example.com");
+  });
+
   describe("getHostUrl", () => {
     it("should return the webUrl if it exists", () => {
       const client = new Client({
@@ -110,6 +116,12 @@ describe("Client", () => {
       expect(result).toBe("https://example.com");
     });
 
+    it("should trim trailing slash on a passed webUrl", () => {
+      const client = new Client({ webUrl: "https://example.com/" });
+      const result = (client as any).getHostUrl();
+      expect(result).toBe("https://example.com");
+    });
+
     it("should return 'https://dev.smith.langchain.com' if apiUrl contains 'dev'", () => {
       const client = new Client({
         apiUrl: "https://dev.smith.langchain.com/api",