diff --git a/packages/fetch-links/links/authHeadersLink.ts b/packages/fetch-links/links/authHeadersLink.ts
deleted file mode 100644
index 4a05667..0000000
--- a/packages/fetch-links/links/authHeadersLink.ts
+++ /dev/null
@@ -1,35 +0,0 @@
-import {AuthClientOptions, mergeHeaders, modifyRequest} from '@opensdks/runtime'
-import {Link} from '../link.js'
-
-export function authHeadersLink(auth: AuthClientOptions): Link {
-  if (auth.oauth && auth.authorizationHeader) {
-    throw new Error('Cannot use both oauth and authorizationHeader')
-  }
-
-  const headers = {
-    ['authorization']: auth.oauth?.accessToken
-      ? `Bearer ${auth.oauth.accessToken}`
-      : auth.authorizationHeader?.bearer
-        ? `Bearer ${auth.authorizationHeader.bearer}`
-        : auth.authorizationHeader?.basic
-          ? `Basic ${btoa(
-              `${auth.authorizationHeader.basic.username}:${auth.authorizationHeader.basic.password}`,
-            )}`
-          : '',
-  } satisfies HeadersInit
-
-  if (!headers['authorization']) {
-    throw new Error('No authorization paramater found')
-  }
-
-  return async (req, next) => {
-    req.headers.delete('authorization')
-    const res = await next(
-      modifyRequest(req, {
-        headers: mergeHeaders(req.headers, headers, {}),
-        body: req.body,
-      }),
-    )
-    return res
-  }
-}
diff --git a/packages/fetch-links/links/authLink.ts b/packages/fetch-links/links/authLink.ts
new file mode 100644
index 0000000..f76ca9a
--- /dev/null
+++ b/packages/fetch-links/links/authLink.ts
@@ -0,0 +1,39 @@
+import {
+  AuthClientOptions,
+  mergeHeaders,
+  modifyRequest,
+  openIntProxyLink,
+} from '@opensdks/runtime'
+import {Link} from '../link.js'
+
+export function authLink(auth: AuthClientOptions, baseUrl: string): Link {
+  if (!auth) {
+    // No Op
+    return (req, next) => next(req)
+  }
+
+  if (auth.openInt) {
+    return openIntProxyLink(auth.openInt, baseUrl)
+  }
+
+  const headers = {
+    ['authorization']: auth.oauth?.accessToken
+      ? `Bearer ${auth.oauth.accessToken}`
+      : auth?.bearer
+        ? `Bearer ${auth.bearer}`
+        : auth?.basic
+          ? `Basic ${btoa(`${auth.basic?.username}:${auth.basic?.password}`)}`
+          : '',
+  } satisfies HeadersInit
+
+  return async (req, next) => {
+    req.headers.delete('authorization')
+    const res = await next(
+      modifyRequest(req, {
+        headers: mergeHeaders(req.headers, headers, {}),
+        body: req.body,
+      }),
+    )
+    return res
+  }
+}
diff --git a/packages/fetch-links/links/openIntProxyLink.ts b/packages/fetch-links/links/openIntProxyLink.ts
index 5b40359..0084aa0 100644
--- a/packages/fetch-links/links/openIntProxyLink.ts
+++ b/packages/fetch-links/links/openIntProxyLink.ts
@@ -53,11 +53,14 @@ interface OpenIntProxyHeaders {
 
 function removeEmptyHeaders(headers: OpenIntProxyHeaders): HeadersInit {
   return Object.fromEntries(
-    Object.entries(headers).filter(([_, value]) => value !== ''),
+    Object.entries(headers).filter(([_, value]) => value && value !== ''),
   ) satisfies HeadersInit
 }
 
-export function openIntProxyLink(opts: OpenIntProxyLinkOptions): Link {
+export function openIntProxyLink(
+  opts: OpenIntProxyLinkOptions,
+  baseUrl: string,
+): Link {
   validateOpenIntProxyLinkOptions(opts)
   const {apiKey, token, resourceId, endUserId, connectorName} = opts
 
@@ -70,13 +73,12 @@ export function openIntProxyLink(opts: OpenIntProxyLinkOptions): Link {
   }) satisfies HeadersInit
 
   return async (req, next) => {
-    const baseUrl = getBaseUrl(req.url)
-    const proxyUrl = 'https://app.openint.dev/api/proxy/'
+    // if (req.url.includes(proxyUrl)) {
+    //   // Was previously necessary as link called twice leading to /api/proxy/api/proxy/?
+    //   return next(req)
+    // }
+    const proxyUrl = 'https://api.openint.dev/proxy'
 
-    if (req.url.includes(proxyUrl)) {
-      // QQ: why is this necessary? why is this link called twice leading to /api/proxy/api/proxy/?
-      return next(req)
-    }
     req.headers.delete('authorization')
     const res = await next(
       modifyRequest(req, {
@@ -88,8 +90,3 @@ export function openIntProxyLink(opts: OpenIntProxyLinkOptions): Link {
     return res
   }
 }
-
-function getBaseUrl(urlStr: string) {
-  const url = new URL(urlStr)
-  return `${url.protocol}//${url.host}/`
-}
diff --git a/packages/runtime/createClient.spec.ts b/packages/runtime/createClient.spec.ts
index a533fe7..c4ec797 100644
--- a/packages/runtime/createClient.spec.ts
+++ b/packages/runtime/createClient.spec.ts
@@ -1,4 +1,7 @@
-import {createFormUrlEncodedBodySerializer} from '@opensdks/runtime'
+import {
+  createClient,
+  createFormUrlEncodedBodySerializer,
+} from '@opensdks/runtime'
 
 test('application/x-www-form-urlencoded defaut dot style', () => {
   const formUrlEncodedBodySerializer = createFormUrlEncodedBodySerializer({})
@@ -50,3 +53,8 @@ test('application/x-www-form-urlencoded bracket style', () => {
     'account=acct_111222&components[account_onboarding][enabled]=true&components[nested][0]=hello&components[nested][1][key]=world',
   )
 })
+
+test('expect links array to have 2 elements', () => {
+  const client = createClient()
+  expect(client.links.length).toBe(2)
+})
diff --git a/packages/runtime/createClient.ts b/packages/runtime/createClient.ts
index 06fad60..5fa8a82 100644
--- a/packages/runtime/createClient.ts
+++ b/packages/runtime/createClient.ts
@@ -4,12 +4,11 @@ import type {PathsWithMethod} from 'openapi-typescript-helpers'
 import {
   applyLinks,
   fetchLink,
-  openIntProxyLink,
   OpenIntProxyLinkOptions,
-  validateOpenIntProxyLinkOptions,
   type HTTPMethod,
   type Link,
 } from '@opensdks/fetch-links'
+import {authLink} from '../fetch-links/links/authLink.js'
 import {HTTPError} from './HTTPError.js'
 import {flattenNestedObject, FlattenOptions} from './utils.js'
 
@@ -18,11 +17,10 @@ type _ClientOptions = NonNullable<Parameters<typeof _createClient>[0]>
 export type AuthClientOptions = {
   openInt?: OpenIntProxyLinkOptions
   // to be passed as Authorization header as a bearer token
-  oauth?: {accessToken: string}
-  authorizationHeader?: {
-    basic?: {username: string; password: string}
-    bearer?: string
-  }
+  oauth?: {accessToken: string; refreshToken?: string; expiresAt?: number}
+  basic?: {username: string; password: string}
+  /** non oauth / directly specifying bearer token */
+  bearer?: string
 }
 export interface ClientOptions extends _ClientOptions {
   links?: Link[] | ((defaultLinks: Link[]) => Link[])
@@ -46,22 +44,7 @@ export function createClient<Paths extends {}>({
 }: ClientOptions = {}) {
   const links = typeof _links === 'function' ? _links(defaultLinks) : _links
 
-  const expectsAuthProxy = validateOpenIntProxyLinkOptions(
-    clientOptions.auth?.openInt ?? {},
-  )
-
-  const hasOtherAuthMethods =
-    clientOptions.auth?.authorizationHeader || clientOptions.auth?.oauth
-
-  if (expectsAuthProxy && hasOtherAuthMethods) {
-    throw new Error('Cannot use both openInt proxy and other auth methods')
-  }
-
-  if (expectsAuthProxy) {
-    links.unshift(openIntProxyLink(clientOptions.auth?.openInt ?? {}))
-  } else if (hasOtherAuthMethods) {
-    links.unshift(fetchLink())
-  }
+  links.unshift(authLink(clientOptions.auth ?? {}, clientOptions.baseUrl ?? ''))
 
   const customFetch: typeof fetch = (url, init) =>
     applyLinks(new Request(url, init), links)