diff --git a/README.md b/README.md
index 140db09..ae2ad68 100644
--- a/README.md
+++ b/README.md
@@ -29,7 +29,7 @@ fastify.get('/accounts', async function (request, reply) {
         const applinkAddon = request.sdk.addons.applink;
 
         logger.info(`Getting org '${orgName}' connection from Heroku Applink add-on...`);
-        const anotherOrg = await applinkAddon.getConnection(orgName);
+        const anotherOrg = await applinkAddon.getAuthorization(orgName);
 
         logger.info(`Querying org '${orgName}' (${anotherOrg.id}) Accounts...`);
         try {
diff --git a/src/add-ons/heroku-applink.ts b/src/add-ons/heroku-applink.ts
index 984707c..f37f526 100644
--- a/src/add-ons/heroku-applink.ts
+++ b/src/add-ons/heroku-applink.ts
@@ -8,45 +8,47 @@
 import { HttpRequestUtil } from "../utils/request";
 import { OrgImpl } from "../sdk/org";
 import { Org } from "../index";
+import {
+  resolveAddonConfigByAttachment,
+  resolveAddonConfigByUrl,
+} from "~/utils/addon-config";
 
 const HTTP_REQUEST = new HttpRequestUtil();
 
 /**
- * Get stored Salesforce or Data Cloud org user credentials for given name or alias.
- * @param name or alias
+ * Get stored Salesforce or Data Cloud org user credentials for given developer name or alias.
+ * @param developerName or alias
+ * @param attachmentNameOrUrl Either an attachment name (e.g. "HEROKU_APPLINK") or a full URL. Defaults to "HEROKU_APPLINK"
  * @returns Org
  */
-export async function getConnection(name: string): Promise<Org> {
-  if (!name) {
-    throw Error(`Connection name not provided`);
+export async function getAuthorization(
+  developerName: string,
+  attachmentNameOrUrl = "HEROKU_APPLINK"
+): Promise<Org> {
+  if (!developerName) {
+    throw Error(`Developer name not provided`);
   }
 
-  const addonEndpoint =
-    process.env.HEROKU_APPLINK_API_URL ||
-    process.env.HEROKU_APPLINK_STAGING_API_URL;
-  if (!addonEndpoint) {
-    throw Error(
-      `Heroku Applink add-on not provisioned on app or endpoint not provided`
-    );
+  // Check if the attachmentNameOrUrl is a URL by attempting to parse it
+  let resolveConfigByUrl = false;
+  try {
+    new URL(attachmentNameOrUrl);
+    resolveConfigByUrl = true;
+  } catch {
+    resolveConfigByUrl = false;
   }
 
-  const addonAuthToken = process.env.HEROKU_APPLINK_TOKEN;
-  if (!addonAuthToken) {
-    throw Error(
-      `Heroku Applink add-on not provisioned on app or authorization token not found`
-    );
-  }
+  const config = resolveConfigByUrl
+    ? resolveAddonConfigByUrl(attachmentNameOrUrl)
+    : resolveAddonConfigByAttachment(attachmentNameOrUrl);
 
-  const authUrl = `${addonEndpoint}/invocations/authorization`;
+  const authUrl = `${config.apiUrl}/authorizations/${developerName}`;
   const opts = {
-    method: "POST",
+    method: "GET",
     headers: {
-      Authorization: `Bearer ${addonAuthToken}`,
+      Authorization: `Bearer ${config.token}`,
       "Content-Type": "application/json",
     },
-    body: JSON.stringify({
-      org_name: name,
-    }),
     retry: {
       limit: 1,
     },
diff --git a/src/index.ts b/src/index.ts
index 73f9606..1d12674 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -9,7 +9,7 @@ import { ContextImpl } from "./sdk/context.js";
 import { InvocationEventImpl } from "./sdk/invocation-event.js";
 import { LoggerImpl } from "./sdk/logger.js";
 import { QueryOperation } from "jsforce/lib/api/bulk";
-import { getConnection } from "./add-ons/heroku-applink.js";
+import { getAuthorization } from "./add-ons/heroku-applink.js";
 
 const CONTENT_TYPE_HEADER = "Content-Type";
 const X_CLIENT_CONTEXT_HEADER = "x-client-context";
@@ -25,7 +25,7 @@ export function init() {
   return {
     addons: {
       applink: {
-        getConnection,
+        getAuthorization,
       },
     },
     dataCloud: {
diff --git a/src/utils/addon-config.ts b/src/utils/addon-config.ts
new file mode 100644
index 0000000..7742184
--- /dev/null
+++ b/src/utils/addon-config.ts
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2024, salesforce.com, inc.
+ * All rights reserved.
+ * SPDX-License-Identifier: BSD-3-Clause
+ * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/BSD-3-Clause
+ */
+
+interface AddonConfig {
+  apiUrl: string;
+  token: string;
+}
+
+export function resolveAddonConfigByAttachment(
+  attachment: string
+): AddonConfig {
+  const apiUrl = process.env[`${attachment.toUpperCase()}_API_URL`];
+  const token = process.env[`${attachment.toUpperCase()}_TOKEN`];
+
+  if (!apiUrl || !token) {
+    throw Error(
+      `Heroku Applink config not found under attachment ${attachment}`
+    );
+  }
+
+  return {
+    apiUrl,
+    token,
+  };
+}
+
+export function resolveAddonConfigByUrl(url: string): AddonConfig {
+  // Find the environment variable ending with _API_URL that matches the given URL
+  const envVarEntries = Object.entries(process.env);
+  const matchingApiUrlEntry = envVarEntries.find(
+    ([key, value]) =>
+      key.endsWith("_API_URL") && value.toLowerCase() === url.toLowerCase()
+  );
+
+  if (!matchingApiUrlEntry) {
+    throw Error(`Heroku Applink config not found for API URL: ${url}`);
+  }
+
+  // Extract the prefix from the API_URL environment variable name
+  const [envVarName] = matchingApiUrlEntry;
+  const prefix = envVarName.slice(0, -"_API_URL".length); // Remove '_API_URL' suffix
+
+  // Look for corresponding token
+  const token = process.env[`${prefix}_TOKEN`];
+  if (!token) {
+    throw Error(`Heroku Applink token not found for API URL: ${url}`);
+  }
+
+  return {
+    apiUrl: matchingApiUrlEntry[1],
+    token,
+  };
+}
diff --git a/test/utils/addon-config.test.ts b/test/utils/addon-config.test.ts
new file mode 100644
index 0000000..c591c11
--- /dev/null
+++ b/test/utils/addon-config.test.ts
@@ -0,0 +1,122 @@
+/*
+ * Copyright (c) 2024, salesforce.com, inc.
+ * All rights reserved.
+ * SPDX-License-Identifier: BSD-3-Clause
+ * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/BSD-3-Clause
+ */
+
+import { expect } from "chai";
+import {
+  resolveAddonConfigByAttachment,
+  resolveAddonConfigByUrl,
+} from "../../src/utils/addon-config";
+
+const ATTACHMENT = "HEROKU_APPLINK";
+
+describe("resolveAddonConfigByAttachment", () => {
+  let originalEnv: NodeJS.ProcessEnv;
+
+  beforeEach(() => {
+    originalEnv = { ...process.env };
+  });
+
+  afterEach(() => {
+    process.env = originalEnv;
+  });
+
+  it("finds config for specified attachment", () => {
+    process.env.HEROKU_APPLINK_API_URL = "https://api.example.com";
+    process.env.HEROKU_APPLINK_TOKEN = "default-token";
+
+    const config = resolveAddonConfigByAttachment(ATTACHMENT);
+    expect(config.apiUrl).to.equal("https://api.example.com");
+    expect(config.token).to.equal("default-token");
+  });
+
+  it("finds config ignoring case of attachment name", () => {
+    process.env.HEROKU_APPLINK_API_URL = "https://api.example.com";
+    process.env.HEROKU_APPLINK_TOKEN = "default-token";
+
+    const config = resolveAddonConfigByAttachment(ATTACHMENT.toLowerCase());
+    expect(config.apiUrl).to.equal("https://api.example.com");
+    expect(config.token).to.equal("default-token");
+  });
+
+  it("throws if API_URL config not found", () => {
+    process.env.HEROKU_APPLINK_TOKEN = "token";
+    // APPLINK_API_URL intentionally not set
+
+    expect(() => resolveAddonConfigByAttachment(ATTACHMENT)).to.throw(
+      "Heroku Applink config not found under attachment HEROKU_APPLINK"
+    );
+  });
+
+  it("throws if TOKEN config not found", () => {
+    process.env.HEROKU_APPLINK_API_URL = "https://api.example.com";
+    // APPLINK_TOKEN intentionally not set
+
+    expect(() => resolveAddonConfigByAttachment(ATTACHMENT)).to.throw(
+      "Heroku Applink config not found under attachment HEROKU_APPLINK"
+    );
+  });
+});
+
+describe("resolveAddonConfigByUrl", () => {
+  let originalEnv: NodeJS.ProcessEnv;
+
+  beforeEach(() => {
+    originalEnv = { ...process.env };
+  });
+
+  afterEach(() => {
+    process.env = originalEnv;
+  });
+
+  it("finds config for matching URL", () => {
+    const testUrl = "https://api.example.com";
+    process.env.HEROKU_APPLINK_API_URL = testUrl;
+    process.env.HEROKU_APPLINK_TOKEN = "test-token";
+
+    const config = resolveAddonConfigByUrl(testUrl);
+    expect(config.apiUrl).to.equal(testUrl);
+    expect(config.token).to.equal("test-token");
+  });
+
+  it("finds config ignoring url case", () => {
+    const testUrl = "https://api.example.com";
+    process.env.HEROKU_APPLINK_API_URL = testUrl;
+    process.env.HEROKU_APPLINK_TOKEN = "test-token";
+
+    const config = resolveAddonConfigByUrl(testUrl.toUpperCase());
+    expect(config.apiUrl).to.equal(testUrl);
+    expect(config.token).to.equal("test-token");
+  });
+
+  it("finds custom prefix config for matching URL", () => {
+    const testUrl = "https://custom.example.com";
+    process.env.CUSTOM_ATTACHMENT_API_URL = testUrl;
+    process.env.CUSTOM_ATTACHMENT_TOKEN = "custom-token";
+
+    const config = resolveAddonConfigByUrl(testUrl);
+    expect(config.apiUrl).to.equal(testUrl);
+    expect(config.token).to.equal("custom-token");
+  });
+
+  it("throws if no matching URL is found", () => {
+    const testUrl = "https://nonexistent.example.com";
+
+    expect(() => resolveAddonConfigByUrl(testUrl)).to.throw(
+      `Heroku Applink config not found for API URL: ${testUrl}`
+    );
+  });
+
+  it("throws if matching URL found but no corresponding token", () => {
+    const testUrl = "https://api.example.com";
+    process.env.SOME_API_URL = testUrl;
+    // SOME_TOKEN intentionally not set
+
+    expect(() => resolveAddonConfigByUrl(testUrl)).to.throw(
+      `Heroku Applink token not found for API URL: ${testUrl}`
+    );
+  });
+});