diff --git a/customer.ts b/customer.ts
new file mode 100644
index 0000000..6d7fd9d
--- /dev/null
+++ b/customer.ts
@@ -0,0 +1,96 @@
+import {
+  HOST,
+  Paginacion,
+  paginacionToSearchParams,
+  Paging,
+} from "./common.js";
+
+export interface CustomerQuery {
+  paginacion?: Paginacion;
+}
+
+export interface Customer {
+  Code: string;
+  BusinessName: string;
+  TradeName: string;
+  Address: string;
+  PostalCode: string;
+  City: string;
+  ProvinceCode: string;
+  TradeAddress: string;
+  PhoneNumbers: string;
+  Email: string;
+  MobilePhoneNumber: string;
+  WebPage: string;
+  IvaCategoryCode: string;
+  DocumentType: string;
+  DocumentNumber: string;
+  PriceListNumber: number;
+  Discount: number;
+  Observations: string;
+  DisabledDate: string;
+  SellerCode: string;
+  CreditQuota: number;
+  LocalAccountBalance: number;
+  ForeignAccountBalance: number;
+  ForeignCurrencyClause: boolean;
+  CreditQuotaCurrencyCode: string;
+  UpdateDatetime?: null;
+  LastUpdateUtc?: string;
+  ShippingAddresses: ShippingAddress[];
+  CustomerComments: CustomerComment[];
+  SaleConditionCode: number;
+  TransportCode: string;
+}
+
+export interface CustomerComment {
+  Line: number;
+  Text: string;
+}
+
+export interface ShippingAddress {
+  Code: string;
+  Address: string;
+  ProvinceCode: string;
+  City: string;
+  PostalCode: string;
+  PhoneNumber1: string;
+  PhoneNumber2: string;
+  DefaultAddress: string;
+  Enabled: string;
+  DeliveryHours: string;
+  DeliversMonday: string;
+  DeliversTuesday: string;
+  DeliversWednesday: string;
+  DeliversThursday: string;
+  DeliversFriday: string;
+  DeliversSaturday: string;
+  DeliversSunday: string;
+}
+
+export interface CustomerResponse {
+  Paging: Paging;
+  Data: Customer[];
+}
+
+export async function getCustomers(
+  token: string,
+  options: CustomerQuery
+): Promise<CustomerResponse> {
+  let searchParams = new URLSearchParams();
+  paginacionToSearchParams(options.paginacion, searchParams);
+  const res = await fetch(
+    `${HOST}/api/Aperture/Customer?${searchParams.toString()}`,
+    {
+      headers: {
+        accesstoken: token,
+      },
+    }
+  );
+  const json = await res.json();
+  console.debug(json);
+  if (json.Message) {
+    throw new Error(`Tango: ${json.Message}`);
+  }
+  return json;
+}
diff --git a/demo/demo.ts b/demo/demo.ts
new file mode 100644
index 0000000..02de6a3
--- /dev/null
+++ b/demo/demo.ts
@@ -0,0 +1,76 @@
+import {
+  dummy,
+  getProductos,
+  getPrices,
+  getPricesByCustomer,
+  getCustomers,
+} from "../index.js";
+
+const tokenInput = document.querySelector<HTMLInputElement>("#token-input")!;
+
+if (localStorage.token) {
+  tokenInput.value = localStorage.token;
+}
+
+function token() {
+  return tokenInput.value;
+}
+
+function clear(el: Node) {
+  while (el.firstChild) {
+    el.firstChild.remove();
+  }
+}
+
+function objectToDom(object: any) {
+  const preEl = document.createElement("pre");
+  const codeEl = document.createElement("code");
+  if (typeof object === "string") {
+    codeEl.append(JSON.stringify(JSON.parse(object), null, 2));
+  } else if (Object.keys(object).length > 0) {
+    codeEl.append(JSON.stringify(object, null, 2));
+  } else {
+    codeEl.append(object);
+  }
+  preEl.append(codeEl);
+  return preEl;
+}
+
+async function showResponse(statusEl: Element | null, promise: Promise<any>) {
+  if (statusEl) clear(statusEl);
+  try {
+    const response = await promise;
+    if (statusEl) {
+      statusEl.append("¡Funcionó!");
+      if (response) {
+        statusEl.append(" Respuesta:", objectToDom(response));
+      }
+    } else alert(`¡Funcionó!${response ? ` Respuesta: ${response}` : ""}`);
+  } catch (error) {
+    if (statusEl) statusEl.append("Hubo un error :(", objectToDom(error));
+    else alert(`Hubo un error: ${error}`);
+  }
+}
+
+function setupForm(selector: string, listener: () => Promise<any>) {
+  const formEl = document.querySelector<HTMLFormElement>(selector);
+  if (!formEl) throw new Error(`No existe el formulario ${selector}`);
+  const statusEl = formEl.querySelector<HTMLElement>(".status");
+  if (!statusEl)
+    console.error(
+      `El formulario ${selector} no tiene un .status, voy a reportar los errores con alert()`
+    );
+  formEl.addEventListener("submit", async (event) => {
+    event.preventDefault();
+    showResponse(statusEl, listener());
+  });
+}
+
+setupForm("#token", () => dummy(token()));
+setupForm("#save-token", async () => {
+  localStorage.token = token();
+});
+setupForm("#productos", () => getProductos(token(), {}));
+setupForm("#price", () => getPrices(token(), {}));
+setupForm("#price-by-customer", () => getPricesByCustomer(token(), {}));
+setupForm("#customer", () => getCustomers(token(), {}));
diff --git a/demo/index.html b/demo/index.html
index 7300564..3d10c88 100644
--- a/demo/index.html
+++ b/demo/index.html
@@ -13,7 +13,12 @@
 <input id="token-input" name="token" />
 
 <form id="token">
-  <button>Probar</button>
+  <button>Probar token</button>
+  <p class="status"></p>
+</form>
+
+<form id="save-token">
+  <button>Guardar token</button>
   <p class="status"></p>
 </form>
 
@@ -22,69 +27,19 @@
   <p class="status"></p>
 </form>
 
-<form id="precios">
+<form id="price">
   <button>Conseguir precios</button>
   <p class="status"></p>
 </form>
 
-<script type="module">
-  import { dummy, getProductos, getPricesByCustomer } from "../build/index.js";
+<form id="price-by-customer">
+  <button>Conseguir precios by customer</button>
+  <p class="status"></p>
+</form>
 
-  function token() {
-    return document.querySelector("#token-input").value;
-  }
+<form id="customer">
+  <button>Conseguir clientes</button>
+  <p class="status"></p>
+</form>
 
-  function clear(el) {
-    while (el.firstChild) {
-      el.firstChild.remove();
-    }
-  }
-
-  function objectToDom(object) {
-    const preEl = document.createElement("pre");
-    const codeEl = document.createElement("code");
-    if (typeof object === "string") {
-      codeEl.append(JSON.stringify(JSON.parse(object), null, 2));
-    } else if (Object.entries(object).length > 0) {
-      codeEl.append(JSON.stringify(object, null, 2));
-    } else {
-      codeEl.append(object);
-    }
-    preEl.append(codeEl);
-    return preEl;
-  }
-
-  async function showResponse(statusEl, promise) {
-    clear(statusEl);
-    try {
-      const response = await promise;
-      statusEl.append("¡Funcionó!");
-      if (response) {
-        statusEl.append(" Respuesta:", objectToDom(response));
-      }
-    } catch (error) {
-      statusEl.append("Hubo un error :(", objectToDom(error));
-    }
-  }
-
-  const tokenForm = document.querySelector("#token");
-  tokenForm.addEventListener("submit", async (event) => {
-    event.preventDefault();
-    const statusEl = event.target.querySelector(".status");
-    showResponse(statusEl, dummy(token()));
-  });
-
-  const productosForm = document.querySelector("#productos");
-  productosForm.addEventListener("submit", async (event) => {
-    event.preventDefault();
-    const statusEl = event.target.querySelector(".status");
-    showResponse(statusEl, getProductos(token(), {}));
-  });
-
-  const preciosForm = document.querySelector("#precios");
-  preciosForm.addEventListener("submit", async (event) => {
-    event.preventDefault();
-    const statusEl = event.target.querySelector(".status");
-    showResponse(statusEl, getPricesByCustomer(token(), {}));
-  });
-</script>
+<script type="module" src="../build/demo/demo.js"></script>
diff --git a/index.ts b/index.ts
index 0d6a80c..2bcca5b 100644
--- a/index.ts
+++ b/index.ts
@@ -2,4 +2,6 @@
 export * from "./common.js";
 export * from "./dummy.js";
 export * from "./product.js";
+export * from "./price.js";
 export * from "./priceByCustomer.js";
+export * from "./customer.js";
diff --git a/price.ts b/price.ts
new file mode 100644
index 0000000..4f85c8d
--- /dev/null
+++ b/price.ts
@@ -0,0 +1,45 @@
+import {
+  HOST,
+  Paginacion,
+  paginacionToSearchParams,
+  Paging,
+} from "./common.js";
+
+export interface PriceQuery {
+  paginacion?: Paginacion;
+}
+
+export interface Price {
+  PriceListNumber: number;
+  SKUCode: string;
+  Price: number;
+  ValidityDateSince: string;
+  ValidityDateUntil: string;
+}
+
+export interface PriceResponse {
+  Paging: Paging;
+  Data: Price[];
+}
+
+export async function getPrices(
+  token: string,
+  options: PriceQuery
+): Promise<PriceResponse> {
+  let searchParams = new URLSearchParams();
+  paginacionToSearchParams(options.paginacion, searchParams);
+  const res = await fetch(
+    `${HOST}/api/Aperture/Price?${searchParams.toString()}`,
+    {
+      headers: {
+        accesstoken: token,
+      },
+    }
+  );
+  const json = await res.json();
+  console.debug(json);
+  if (json.Message) {
+    throw new Error(`Tango: ${json.Message}`);
+  }
+  return json;
+}