diff --git a/examples/indexes.ts b/examples/indexes.ts
index ad03a03..0a7e97b 100644
--- a/examples/indexes.ts
+++ b/examples/indexes.ts
@@ -5,7 +5,10 @@ import Client from "../src";
 const client = new Client();
 
 (async () => {
-    const index = await client.indexes.create("support-tickets");
+    let index = await client.indexes.get("support-tickets");
+    if (!index) {
+        index = await client.indexes.create("support-tickets");
+    }
 
     const tickets = [
         {
diff --git a/package.json b/package.json
index 4fb144c..d7797be 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "opperai",
-  "version": "0.5.2",
+  "version": "0.6.0",
   "description": "Typescript SDK for the Opper API",
   "main": "dist/index.js",
   "types": "dist/index.js",
diff --git a/src/__tests__/__snapshots__/spans.test.ts.snap b/src/__tests__/__snapshots__/spans.test.ts.snap
index 3976d4d..b87e72f 100644
--- a/src/__tests__/__snapshots__/spans.test.ts.snap
+++ b/src/__tests__/__snapshots__/spans.test.ts.snap
@@ -17,7 +17,6 @@ exports[`Spans span with child span Should create a parent and child span 1`] =
   "name": "child-span",
   "output": "child output",
   "parent_uuid": "parent-uuid",
-  "project": "missing_project",
   "start_time": 2020-04-01T00:00:00.000Z,
   "uuid": "return-a-uuid",
 }
@@ -30,7 +29,6 @@ exports[`Spans span with child span Should create a parent and child span 2`] =
   "name": "parent-span",
   "output": "parent output",
   "parent_uuid": undefined,
-  "project": "missing_project",
   "start_time": 2020-04-01T00:00:00.000Z,
   "uuid": "return-a-uuid",
 }
@@ -40,7 +38,6 @@ exports[`Spans startSpan should call fetch with correct parameters and resolve w
 {
   "input": "",
   "name": "test-span",
-  "project": "missing_project",
   "start_time": 2020-04-01T00:00:00.000Z,
   "uuid": "span-uuid",
 }
diff --git a/src/__tests__/client.test.ts b/src/__tests__/client.test.ts
index de2a4bc..6b6f776 100644
--- a/src/__tests__/client.test.ts
+++ b/src/__tests__/client.test.ts
@@ -96,13 +96,13 @@ describe("OpperAIClient", () => {
         it("should be able to list indexes", async () => {
             const mockIndexes: Index[] = [
                 {
-                    id: 1,
+                    uuid: "1",
                     name: "Test Index 1",
                     created_at: new Date(),
                     files: [],
                 },
                 {
-                    id: 2,
+                    uuid: "2",
                     name: "Test Index 2",
                     created_at: new Date(),
                     files: [],
diff --git a/src/__tests__/opperai-indexes.test.ts b/src/__tests__/opperai-indexes.test.ts
index 7f02ed0..4499fb5 100644
--- a/src/__tests__/opperai-indexes.test.ts
+++ b/src/__tests__/opperai-indexes.test.ts
@@ -17,13 +17,13 @@ describe("OpperAIIndexes", () => {
 
     const mockIndexes: Index[] = [
         {
-            id: 1,
+            uuid: "1",
             name: "Test Index 1",
             created_at: new Date(),
             files: [],
         },
         {
-            id: 2,
+            uuid: "2",
             name: "Test Index 2",
             created_at: new Date(),
             files: [],
diff --git a/src/__tests__/spans.test.ts b/src/__tests__/spans.test.ts
index 5516154..97fa077 100644
--- a/src/__tests__/spans.test.ts
+++ b/src/__tests__/spans.test.ts
@@ -157,13 +157,11 @@ describe("Spans", () => {
             expect(childEndSpan.name).toBe("child-span");
             expect(childEndSpan.output).toBe("child output");
             expect(childEndSpan.parent_uuid).toBe("parent-uuid");
-            expect(childEndSpan.project).toBe("missing_project");
             expect(childEndSpan).toMatchSnapshot();
 
             expect(parentEndSpan.name).toBe("parent-span");
             expect(parentEndSpan.output).toBe("parent output");
             expect(parentEndSpan.parent_uuid).toBe(undefined);
-            expect(parentEndSpan.project).toBe("missing_project");
             expect(parentEndSpan).toMatchSnapshot();
         });
     });
diff --git a/src/api-resource.ts b/src/api-resource.ts
index 9044305..1947f0d 100644
--- a/src/api-resource.ts
+++ b/src/api-resource.ts
@@ -254,11 +254,11 @@ class APIResource {
         });
 
         if (response.status === 200) {
-            const { id } = await response.json();
+            const { uuid } = await response.json();
 
             const update = await this.doPost(
-                `${paths.create}/${id}`,
-                JSON.stringify({ ...data, id })
+                `${paths.create}/${uuid}`,
+                JSON.stringify({ ...data, uuid })
             );
 
             return update.json();
@@ -359,14 +359,14 @@ class APIResource {
     protected calcURLIndexes = () => {
         return `${this._client.baseURL}/v1/indexes`;
     };
-    protected calcURLIndex = (id: number) => {
-        return `${this._client.baseURL}/v1/indexes/${id}`;
+    protected calcURLIndex = (uuid: string) => {
+        return `${this._client.baseURL}/v1/indexes/${uuid}`;
     };
-    protected calcURLAddIndex = (id: number) => {
-        return `${this._client.baseURL}/v1/indexes/${id}/index`;
+    protected calcURLAddIndex = (uuid: string) => {
+        return `${this._client.baseURL}/v1/indexes/${uuid}/index`;
     };
-    protected calcURLQueryIndex = (id: number) => {
-        return `${this._client.baseURL}/v1/indexes/${id}/query`;
+    protected calcURLQueryIndex = (uuid: string) => {
+        return `${this._client.baseURL}/v1/indexes/${uuid}/query`;
     };
     protected calcURLCreateFunction = () => {
         return `${this._client.baseURL}/api/v1/functions`;
@@ -374,8 +374,8 @@ class APIResource {
     protected calcURLGetFunctionByPath = (path: string) => {
         return `${this._client.baseURL}/api/v1/functions/by_path/${path}`;
     };
-    protected calcURLUpdateFunction = (id: number) => {
-        return `${this._client.baseURL}/api/v1/functions/${id}`;
+    protected calcURLUpdateFunction = (uuid: string) => {
+        return `${this._client.baseURL}/api/v1/functions/${uuid}`;
     };
 
     protected calcURLSpans = () => {
diff --git a/src/functions.ts b/src/functions.ts
index 278570d..9dcc401 100644
--- a/src/functions.ts
+++ b/src/functions.ts
@@ -30,10 +30,10 @@ class Functions extends APIResource {
      * @throws {OpperError} If the function id is not provided.
      */
     public async update(f: AIFunction): Promise<AIFunction> {
-        if (!f.id) {
-            throw new OpperError("Function id is required");
+        if (!f.uuid) {
+            throw new OpperError("Function uuid is required");
         }
-        const response = await this.doPost(this.calcURLUpdateFunction(f.id), JSON.stringify(f));
+        const response = await this.doPost(this.calcURLUpdateFunction(f.uuid), JSON.stringify(f));
         if (response.status !== 200) {
             const responseData = await response.json();
             throw new OpperError(
@@ -60,7 +60,7 @@ class Functions extends APIResource {
                 if (!update) {
                     throw new OpperError(`Function with path ${f.path} already exists`);
                 }
-                f.id = responseData.id;
+                f.uuid = responseData.uuid;
                 return await this.update(f);
             }
         } catch (error) {
@@ -75,7 +75,7 @@ class Functions extends APIResource {
 
         if (response.status === 200) {
             const data = await response.json();
-            f.id = data.id;
+            f.uuid = data.uuid;
             return f;
         }
 
diff --git a/src/indexes.ts b/src/indexes.ts
index 5f2a4f7..01fcfc6 100644
--- a/src/indexes.ts
+++ b/src/indexes.ts
@@ -52,12 +52,12 @@ class Indexes extends APIResource {
 
     /**
      * Deletes an index
-     * @param id The id of the index to delete.
+     * @param uuid The uuid of the index to delete.
      * @returns A promise that resolves to void.
      * @throws {APIError} If the response status is not 200.
      */
-    public async delete(id: number): Promise<void> {
-        await this.doDelete(this.calcURLIndex(id));
+    public async delete(uuid: string): Promise<void> {
+        await this.doDelete(this.calcURLIndex(uuid));
     }
 
     /**
@@ -74,7 +74,7 @@ class Indexes extends APIResource {
      * ```
      */
     public async add(index: Index, document: Document): Promise<void> {
-        await this.doPost(this.calcURLAddIndex(index.id), JSON.stringify(document));
+        await this.doPost(this.calcURLAddIndex(index.uuid), JSON.stringify(document));
     }
 
     /**
@@ -93,7 +93,7 @@ class Indexes extends APIResource {
         filters: Filter[] | null
     ): Promise<Document[]> {
         const response = await this.doPost(
-            this.calcURLQueryIndex(index.id),
+            this.calcURLQueryIndex(index.uuid),
             JSON.stringify({ q: query, k: k, filters: filters })
         );
 
diff --git a/src/spans.ts b/src/spans.ts
index 8289554..a655cb4 100644
--- a/src/spans.ts
+++ b/src/spans.ts
@@ -16,7 +16,6 @@ class Spans extends APIResource {
         input = "",
         start_time = new Date(),
         uuid = this.nanoId(),
-        project = process.env.OPPER_PROJECT || "missing_project",
         ...rest
     }: Omit<Span, "uuid"> & { uuid?: string }) {
         spanContextStorage.enterWith({ spanId: uuid });
@@ -26,7 +25,6 @@ class Spans extends APIResource {
             name,
             input,
             start_time,
-            project,
             uuid,
         });
     }
diff --git a/src/types.ts b/src/types.ts
index 2ecb7db..11416f7 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -55,7 +55,7 @@ export interface OpperAIChatResponse {
 }
 
 export type IndexFileData = {
-    id: number;
+    uuid: string;
     original_filename: string;
     size: number;
     index_status:
@@ -72,7 +72,7 @@ export type IndexFileData = {
 };
 
 export type Index = {
-    id: number;
+    uuid: string;
     name: string;
     created_at: Date;
     files: IndexFileData[];
@@ -87,13 +87,13 @@ export interface Filter {
 }
 
 export type Document = {
-    id?: string;
+    uuid?: string;
     key?: string; // a unique key that one can use if you want to update the document
     content: string;
     metadata: Record<string, unknown>;
 };
 export type AIFunction = {
-    id?: number;
+    uuid?: string;
     path: string;
     description: string;
     instructions: string;
@@ -114,7 +114,6 @@ export interface CacheConfig {
 
 export type Span = {
     uuid: string;
-    project?: string;
     name?: string;
     input?: string;
     output?: string;