diff --git a/bin/helpers/utils.js b/bin/helpers/utils.js
index a6903720..c15cc69d 100644
--- a/bin/helpers/utils.js
+++ b/bin/helpers/utils.js
@@ -31,7 +31,7 @@ const usageReporting = require("./usageReporting"),
   pkg = require('../../package.json'),
   transports = require('./logger').transports,
   o11yHelpers = require('../testObservability/helper/helper'),
-  { OBSERVABILITY_ENV_VARS, TEST_OBSERVABILITY_REPORTER } = require('../testObservability/helper/constants');
+  { OBSERVABILITY_ENV_VARS, TEST_OBSERVABILITY_REPORTER, remoteReporterApiUrl } = require('../testObservability/helper/constants');
 
 const { default: axios } = require("axios");
 const { shouldProcessEventForTesthub } = require("../testhub/utils");
@@ -610,6 +610,10 @@ exports.setSystemEnvs = (bsConfig) => {
    logger.error(`Error in adding accessibility configs ${error}`)
   }
 
+  // Remote reporter must post to this build's collector, not its package default. Kept out of the
+  // try below, which swallows errors: a rejected override must fail rather than fall back silently.
+  envKeys['BROWSERSTACK_TEST_OBSERVABILITY_API_URL'] = remoteReporterApiUrl();
+
   try {
     OBSERVABILITY_ENV_VARS.forEach(key => {
       envKeys[key] = process.env[key];
diff --git a/bin/testObservability/helper/constants.js b/bin/testObservability/helper/constants.js
index d3013f40..c2cb0c8f 100644
--- a/bin/testObservability/helper/constants.js
+++ b/bin/testObservability/helper/constants.js
@@ -3,7 +3,37 @@ const path = require('path');
 exports.consoleHolder = Object.assign({},console);
 exports.BATCH_SIZE = 1000;
 exports.BATCH_INTERVAL = 2000;
-exports.API_URL = 'https://collector-observability.browserstack.com';
+const DEFAULT_API_URL = 'https://collector-observability.browserstack.com';
+
+// Requests to the collector carry BS_TESTOPS_JWT, so an http:// override would put the build's token
+// on the wire in cleartext. Request urls are also built as `${base}/${path}`, so a query or fragment
+// would swallow the endpoint. Reject such values instead of quietly using the default collector.
+const httpsOverride = (name) => {
+  const value = process.env[name];
+  if (!value) return undefined;
+  let parsed;
+  // The value can carry credentials, and callers log the error, so never echo it back.
+  try {
+    parsed = new URL(value);
+  } catch (err) {
+    throw new Error(`${name} must be a valid https:// URL`);
+  }
+  if (parsed.protocol !== 'https:' || !parsed.hostname) {
+    throw new Error(`${name} must be an https:// URL`);
+  }
+  if (parsed.search || parsed.hash) {
+    throw new Error(`${name} must not contain a query or fragment`);
+  }
+  // Normalise to origin + path with no trailing separator: a stray `/`, `?` or `#` would otherwise
+  // turn the appended endpoint into a query or fragment.
+  return `${parsed.origin}${parsed.pathname}`.replace(/\/+$/, '');
+};
+
+// Overridable so the remote reporter (own install of this package) can target the launching cli's collector
+exports.API_URL = httpsOverride('BROWSERSTACK_TEST_OBSERVABILITY_API_URL') || DEFAULT_API_URL;
+// Collector handed to the reporter on the remote machine; separate override for when it cannot reach API_URL
+exports.remoteReporterApiUrl = () => httpsOverride('BROWSERSTACK_TEST_OBSERVABILITY_REMOTE_API_URL')
+  || httpsOverride('BROWSERSTACK_TEST_OBSERVABILITY_API_URL') || DEFAULT_API_URL;
 
 exports.IPC_EVENTS = {
   LOG: 'testObservability:cypressLog',
diff --git a/test/unit/bin/helpers/utils.js b/test/unit/bin/helpers/utils.js
index 480cb5f4..cac8faf5 100644
--- a/test/unit/bin/helpers/utils.js
+++ b/test/unit/bin/helpers/utils.js
@@ -961,6 +961,93 @@ describe('utils', () => {
       delete process.env.CYPRESS_TEST_1;
       delete process.env.cypress_test_2;
     });
+
+    const URL_ENV_VARS = [
+      'BROWSERSTACK_TEST_OBSERVABILITY_API_URL',
+      'BROWSERSTACK_TEST_OBSERVABILITY_REMOTE_API_URL',
+    ];
+    let savedUrlEnvs = {};
+
+    beforeEach(() => {
+      URL_ENV_VARS.forEach((key) => {
+        savedUrlEnvs[key] = process.env[key];
+        delete process.env[key];
+      });
+    });
+
+    afterEach(() => {
+      URL_ENV_VARS.forEach((key) => {
+        if (savedUrlEnvs[key] === undefined) {
+          delete process.env[key];
+        } else {
+          process.env[key] = savedUrlEnvs[key];
+        }
+      });
+    });
+
+    it('forwards the observability collector url for the remote reporter', () => {
+      let bsConfig = { run_settings: { env: null } };
+
+      utils.setSystemEnvs(bsConfig);
+      expect(bsConfig.run_settings.system_env_vars)
+        .to.be.an('array')
+        .that.includes('BROWSERSTACK_TEST_OBSERVABILITY_API_URL=https://collector-observability.browserstack.com');
+    });
+
+    it('forwards an overridden observability collector url', () => {
+      process.env.BROWSERSTACK_TEST_OBSERVABILITY_API_URL = 'https://collector-example.bsstag.com';
+      let bsConfig = { run_settings: { env: null } };
+
+      utils.setSystemEnvs(bsConfig);
+      expect(bsConfig.run_settings.system_env_vars)
+        .to.be.an('array')
+        .that.includes('BROWSERSTACK_TEST_OBSERVABILITY_API_URL=https://collector-example.bsstag.com');
+    });
+
+    it('prefers a separate remote collector url for the remote reporter', () => {
+      process.env.BROWSERSTACK_TEST_OBSERVABILITY_API_URL = 'https://collector-private.bsstag.com';
+      process.env.BROWSERSTACK_TEST_OBSERVABILITY_REMOTE_API_URL = 'https://collector-public.bsstag.com';
+      let bsConfig = { run_settings: { env: null } };
+
+      utils.setSystemEnvs(bsConfig);
+      expect(bsConfig.run_settings.system_env_vars)
+        .to.be.an('array')
+        .that.includes('BROWSERSTACK_TEST_OBSERVABILITY_API_URL=https://collector-public.bsstag.com');
+    });
+
+    it('rejects a collector url that is not https', () => {
+      process.env.BROWSERSTACK_TEST_OBSERVABILITY_REMOTE_API_URL = 'http://collector-public.bsstag.com';
+      let bsConfig = { run_settings: { env: null } };
+
+      expect(() => utils.setSystemEnvs(bsConfig)).to.throw(/must be an https:\/\/ URL/);
+    });
+
+    it('rejects a collector url carrying a query or fragment', () => {
+      process.env.BROWSERSTACK_TEST_OBSERVABILITY_REMOTE_API_URL = 'https://collector-public.bsstag.com/#staging';
+      let bsConfig = { run_settings: { env: null } };
+
+      expect(() => utils.setSystemEnvs(bsConfig)).to.throw(/must not contain a query or fragment/);
+    });
+
+    it('normalises a bare query or fragment delimiter', () => {
+      process.env.BROWSERSTACK_TEST_OBSERVABILITY_REMOTE_API_URL = 'https://collector-public.bsstag.com?';
+      let bsConfig = { run_settings: { env: null } };
+
+      utils.setSystemEnvs(bsConfig);
+      expect(bsConfig.run_settings.system_env_vars)
+        .to.be.an('array')
+        .that.includes('BROWSERSTACK_TEST_OBSERVABILITY_API_URL=https://collector-public.bsstag.com');
+    });
+
+    it('trims a trailing slash so endpoint paths are not doubled', () => {
+      process.env.BROWSERSTACK_TEST_OBSERVABILITY_REMOTE_API_URL = 'https://collector-public.bsstag.com/';
+      let bsConfig = { run_settings: { env: null } };
+
+      utils.setSystemEnvs(bsConfig);
+      expect(bsConfig.run_settings.system_env_vars)
+        .to.be.an('array')
+        .that.includes('BROWSERSTACK_TEST_OBSERVABILITY_API_URL=https://collector-public.bsstag.com');
+    });
   });
 
   describe('fixCommaSeparatedString', () => {