diff --git a/js/.changeset/lemon-geese-hear.md b/js/.changeset/lemon-geese-hear.md
new file mode 100644
index 0000000000..24870d616e
--- /dev/null
+++ b/js/.changeset/lemon-geese-hear.md
@@ -0,0 +1,5 @@
+---
+"@arizeai/openinference-instrumentation-openai": minor
+---
+
+extract url for span attributes
diff --git a/js/packages/openinference-instrumentation-openai/src/httpUtils.ts b/js/packages/openinference-instrumentation-openai/src/httpUtils.ts
new file mode 100644
index 0000000000..fd56fd0867
--- /dev/null
+++ b/js/packages/openinference-instrumentation-openai/src/httpUtils.ts
@@ -0,0 +1,91 @@
+/**
+ * HTTP utilities for OpenTelemetry instrumentation
+ * JavaScript equivalent of opentelemetry-python-contrib/util/opentelemetry-util-http
+ * Minimal version containing only URL redaction functionality
+ */
+
+/**
+ * List of query parameters that should be redacted for security
+ */
+const PARAMS_TO_REDACT = [
+  "AWSAccessKeyId",
+  "Signature",
+  "sig",
+  "X-Goog-Signature",
+];
+
+/**
+ * Replaces the username and password with the keyword `REDACTED` in a URL
+ * Only modifies the URL if it is valid and contains credentials
+ * @param url The URL string to process
+ * @returns The URL with credentials redacted, or original URL if invalid
+ */
+export function removeUrlCredentials(url: string): string {
+  try {
+    const parsed = new URL(url);
+
+    // Check if URL has credentials
+    if (parsed.username || parsed.password) {
+      // Create new URL with redacted credentials
+      const newUrl = new URL(url);
+      newUrl.username = "REDACTED";
+      newUrl.password = "REDACTED";
+      return newUrl.toString();
+    }
+
+    return url;
+  } catch (error) {
+    // If URL parsing fails, return original URL
+    return url;
+  }
+}
+
+/**
+ * Redacts sensitive query parameter values in a URL
+ * @param url The URL string to process
+ * @returns The URL with sensitive query parameters redacted, or original URL if no changes needed
+ */
+export function redactQueryParameters(url: string): string {
+  try {
+    const parsed = new URL(url);
+
+    if (!parsed.search) {
+      // No query parameters to redact
+      return url;
+    }
+
+    const searchParams = new URLSearchParams(parsed.search);
+    let hasRedactedParams = false;
+
+    // Check if any parameters need redaction
+    for (const param of PARAMS_TO_REDACT) {
+      if (searchParams.has(param)) {
+        searchParams.set(param, "REDACTED");
+        hasRedactedParams = true;
+      }
+    }
+
+    if (!hasRedactedParams) {
+      return url;
+    }
+
+    // Reconstruct URL with redacted parameters
+    const newUrl = new URL(url);
+    newUrl.search = searchParams.toString();
+    return newUrl.toString();
+  } catch (error) {
+    // If URL parsing fails, return original URL
+    return url;
+  }
+}
+
+/**
+ * Redacts sensitive data from the URL, including credentials and query parameters
+ * @param url The URL string to process
+ * @returns The URL with all sensitive data redacted
+ */
+export function redactUrl(url: string): string {
+  let redactedUrl = removeUrlCredentials(url);
+  redactedUrl = redactQueryParameters(redactedUrl);
+  return redactedUrl;
+}
diff --git a/js/packages/openinference-instrumentation-openai/src/instrumentation.ts b/js/packages/openinference-instrumentation-openai/src/instrumentation.ts
index d2bead6188..53a36d851e 100644
--- a/js/packages/openinference-instrumentation-openai/src/instrumentation.ts
+++ b/js/packages/openinference-instrumentation-openai/src/instrumentation.ts
@@ -41,6 +41,7 @@ import {
 } from "openai/resources";
 import { assertUnreachable, isString } from "./typeUtils";
 import { isTracingSuppressed } from "@opentelemetry/core";
+import { redactUrl } from "./httpUtils";
 
 import {
   OITracer,
@@ -95,6 +96,73 @@ function getExecContext(span: Span) {
   return execContext;
 }
 
+/**
+ * Extracts the base URL from an OpenAI client instance
+ * @param instance The OpenAI client instance (may be nested)
+ * @returns The base URL string, or undefined if not found
+ */
+function getBaseUrl(instance: unknown): string | undefined {
+  const client = instance as {
+    baseURL?: string;
+    _client?: { baseURL?: string };
+  };
+  return client.baseURL || client._client?.baseURL;
+}
+
+/**
+ * Extracts the relative path from a full URL given a base URL
+ * @param fullUrl The complete URL to extract the path from
+ * @param baseUrl The base URL to remove from the full URL
+ * @returns The relative path, or null if extraction fails
+ */
+const extractRelativePath = (
+  fullUrl: string,
+  baseUrl: string,
+): string | null => {
+  try {
+    const [basePath, fullPath] = [
+      new URL(baseUrl).pathname,
+      new URL(fullUrl).pathname,
+    ];
+    const path = fullPath.startsWith(basePath)
+      ? fullPath.slice(basePath.length)
+      : fullPath;
+    return path.startsWith("/") ? path : `/${path}`;
+  } catch {
+    return null;
+  }
+};
+
+/**
+ * Adds back non-sensitive query parameters to a redacted URL
+ * @param redactedUrl The URL that has been redacted
+ * @param originalUrl The original URL containing parameters
+ * @param paramsToRestore Array of parameter names to restore (defaults to ["api-version"])
+ * @returns The redacted URL with specified parameters restored
+ */
+const addBackNonSensitiveParams = (
+  redactedUrl: string,
+  originalUrl: string,
+  paramsToRestore: string[] = ["api-version"],
+): string => {
+  try {
+    const [original, redacted] = [new URL(originalUrl), new URL(redactedUrl)];
+    let hasChanges = false;
+
+    for (const param of paramsToRestore) {
+      const value = original.searchParams.get(param);
+      if (value) {
+        redacted.searchParams.set(param, value);
+        hasChanges = true;
+      }
+    }
+
+    return hasChanges ? redacted.toString() : redactedUrl;
+  } catch {
+    return redactedUrl;
+  }
+};
+
 /**
  * Gets the appropriate LLM provider based on the OpenAI client instance
  * Follows the same logic as the Python implementation by checking the baseURL host
@@ -256,6 +324,33 @@ export class OpenAIInstrumentation extends InstrumentationBase<typeof openai> {
     // eslint-disable-next-line @typescript-eslint/no-this-alias
     const instrumentation: OpenAIInstrumentation = this;
 
+    // Patch the buildURL method to capture URL information
+    this._wrap(
+      module.OpenAI.prototype,
+      "buildURL",
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      (original: any): any => {
+        return function patchedBuildURL(this: unknown, ...args: unknown[]) {
+          const urlFull = original.apply(this, args) as string;
+          const activeSpan = trace.getActiveSpan();
+
+          if (!activeSpan) return urlFull;
+
+          const redactedUrl = redactUrl(urlFull);
+          const finalUrl = addBackNonSensitiveParams(redactedUrl, urlFull);
+          activeSpan.setAttribute("url.full", finalUrl);
+
+          const baseUrl = getBaseUrl(this);
+          const urlPath = baseUrl && extractRelativePath(urlFull, baseUrl);
+          if (urlPath) {
+            activeSpan.setAttribute("url.path", urlPath);
+          }
+
+          return urlFull;
+        };
+      },
+    );
+
     // Patch create chat completions
     type ChatCompletionCreateType =
       typeof module.OpenAI.Chat.Completions.prototype.create;
@@ -614,6 +709,7 @@ export class OpenAIInstrumentation extends InstrumentationBase<typeof openai> {
     moduleVersion?: string,
   ) {
     diag.debug(`Removing patch for ${MODULE_NAME}@${moduleVersion}`);
+    this._unwrap(moduleExports.OpenAI.prototype, "buildURL");
     this._unwrap(moduleExports.OpenAI.Chat.Completions.prototype, "create");
     this._unwrap(moduleExports.OpenAI.Completions.prototype, "create");
     this._unwrap(moduleExports.OpenAI.Embeddings.prototype, "create");
diff --git a/js/packages/openinference-instrumentation-openai/test/httpUtils.test.ts b/js/packages/openinference-instrumentation-openai/test/httpUtils.test.ts
new file mode 100644
index 0000000000..7ae0c620c7
--- /dev/null
+++ b/js/packages/openinference-instrumentation-openai/test/httpUtils.test.ts
@@ -0,0 +1,37 @@
+import { redactUrl } from "../src/httpUtils";
+
+describe("httpUtils", () => {
+  describe("redactUrl", () => {
+    it("should redact credentials from URLs", () => {
+      const url = "https://user:pass@api.openai.com/v1/chat/completions";
+      const result = redactUrl(url);
+      expect(result).toBe(
+        "https://REDACTED:REDACTED@api.openai.com/v1/chat/completions",
+      );
+    });
+
+    it("should redact sensitive query parameters", () => {
+      const url =
+        "https://api.example.com/chat?AWSAccessKeyId=secret&Signature=secret&model=gpt-4";
+      const result = redactUrl(url);
+      expect(result).toBe(
+        "https://api.example.com/chat?AWSAccessKeyId=REDACTED&Signature=REDACTED&model=gpt-4",
+      );
+    });
+
+    it("should redact both credentials and query parameters", () => {
+      const url =
+        "https://user:pass@api.example.com/chat?AWSAccessKeyId=secret&model=gpt-4";
+      const result = redactUrl(url);
+      expect(result).toBe(
+        "https://REDACTED:REDACTED@api.example.com/chat?AWSAccessKeyId=REDACTED&model=gpt-4",
+      );
+    });
+
+    it("should handle malformed URLs gracefully", () => {
+      const malformedUrl = "not-a-valid-url";
+      const result = redactUrl(malformedUrl);
+      expect(result).toBe(malformedUrl);
+    });
+  });
+});
diff --git a/js/packages/openinference-instrumentation-openai/test/openai.test.ts b/js/packages/openinference-instrumentation-openai/test/openai.test.ts
index 3d31305f56..c8c219fbde 100644
--- a/js/packages/openinference-instrumentation-openai/test/openai.test.ts
+++ b/js/packages/openinference-instrumentation-openai/test/openai.test.ts
@@ -938,6 +938,12 @@ describe("OpenAIInstrumentation", () => {
 `);
   });
 
+  it("should ensure buildURL method exists on OpenAI prototype", () => {
+    // This test will fail if OpenAI SDK removes buildURL method
+    // If this fails, update the instrumentation to use a different approach
+    expect(typeof OpenAI.prototype.buildURL).toBe("function");
+  });
+
   it("should capture context attributes and add them to spans", async () => {
     const response = {
       id: "cmpl-8fZu1H3VijJUWev9asnxaYyQvJTC9",
@@ -1002,6 +1008,7 @@ describe("OpenAIInstrumentation", () => {
 }
 `);
   });
+
   it("creates a span for chat completions parse", async () => {
     const response = {
       id: "chatcmpl-parseTest",
@@ -1650,4 +1657,17 @@ describe("OpenAIInstrumentation with a custom tracer provider", () => {
       expect(span.attributes["llm.model_name"]).toBe("gpt-3.5-turbo-0613");
     });
   });
+
+  describe("URL extraction", () => {
+    it("should detect Azure provider correctly", () => {
+      const azureClient = new OpenAI({
+        apiKey: "test-key",
+        baseURL:
+          "https://test-resource.openai.azure.com/openai/deployments/gpt-4",
+      });
+
+      // Just verify the client was created with Azure base URL
+      expect(azureClient.baseURL).toContain("openai.azure.com");
+    });
+  });
 });