diff --git a/README.md b/README.md
index d5dbd353..3f8cb573 100644
--- a/README.md
+++ b/README.md
@@ -369,13 +369,15 @@ install ID stored locally in `~/.openwiki/install-id`:
   no-op), plus a coarse error category on failure (never the error message).
   Interactive chat, `auth`, and `ingest` are not recorded.
 - At setup (on init only): which brain mode (code / personal), the model
-  provider, and which connectors you configured (connector names only, never
-  their contents).
+  provider, the configured base API URL when using the OpenAI-compatible provider
+  (with credentials, query strings, and fragments stripped), and which connectors
+  you configured (connector names only, never their contents).
 
 **What is never collected:** file contents, repository data or names,
 credentials, prompts, model output, connector payloads, error messages, file
-paths, URLs, model IDs, run duration, your IP address, or any personal
-information. Geoip enrichment is disabled and your IP is never stored. Events
+paths, URLs other than the OpenAI-compatible base API URL, model IDs, run
+duration, your IP address, or any personal information. Geoip enrichment is
+disabled and your IP is never stored. Events
 are grouped by your random install ID so we can measure repeat usage, but that
 ID contains no personal data.
 
diff --git a/src/agent/index.ts b/src/agent/index.ts
index 06b99b07..c09c25ba 100644
--- a/src/agent/index.ts
+++ b/src/agent/index.ts
@@ -146,11 +146,12 @@ export async function runOpenWikiAgent(
   // invalid model, missing base URL) is still recorded. They may be undefined
   // in the catch if resolution threw before assigning them.
   let provider: OpenWikiProvider | undefined;
+  let providerBaseUrl: string | undefined;
   let modelId: string | undefined;
 
   try {
     provider = resolveConfiguredProvider();
-    const providerBaseUrl = resolveProviderBaseUrl(provider);
+    providerBaseUrl = resolveProviderBaseUrl(provider);
     emitDebug(options, `provider=${provider}`);
     if (providerBaseUrl) {
       emitDebug(options, `provider.baseUrl=${JSON.stringify(providerBaseUrl)}`);
@@ -184,6 +185,7 @@ export async function runOpenWikiAgent(
     await recordRunSafe(command, options, {
       provider,
       outcome: "success",
+      openAiCompatibleBaseUrl: providerBaseUrl,
     });
 
     return result;
@@ -194,6 +196,7 @@ export async function runOpenWikiAgent(
       provider,
       outcome: "failure",
       errorClass: classifyError(error),
+      openAiCompatibleBaseUrl: providerBaseUrl,
     });
 
     throw error;
diff --git a/src/telemetry/config.ts b/src/telemetry/config.ts
index b151381e..537e6bb8 100644
--- a/src/telemetry/config.ts
+++ b/src/telemetry/config.ts
@@ -32,7 +32,7 @@ export const TELEMETRY_RUN_EVENT = "openwiki_run";
  * box, and the print/non-TTY path frames and wraps them (see cli.tsx).
  */
 export const FIRST_RUN_NOTICE_BODY =
-  "OpenWiki collects anonymous, aggregate usage data: which command you run (init or update), the brain mode and model provider you set up, whether runs succeed or fail (and a general error category), and which connectors you configured. No file contents, repository data, credentials, prompts, model output, IP address, or personal information are ever collected.";
+  "OpenWiki collects anonymous, aggregate usage data: which command you run (init or update), the brain mode and model provider you set up, the configured base API URL when using the OpenAI-compatible provider (without credentials, query strings, or fragments), whether runs succeed or fail (and a general error category), and which connectors you configured. No file contents, repository data, credentials, prompts, model output, IP address, or personal information are ever collected.";
 export const FIRST_RUN_NOTICE_OPT_OUT =
   "Opt out anytime: set OPENWIKI_TELEMETRY_DISABLED=1 (or DO_NOT_TRACK=1). Add it to ~/.openwiki/.env to make it permanent.";
 export const FIRST_RUN_NOTICE_VERIFY =
diff --git a/src/telemetry/record-run-safe.ts b/src/telemetry/record-run-safe.ts
index 1bf15b32..a864d68c 100644
--- a/src/telemetry/record-run-safe.ts
+++ b/src/telemetry/record-run-safe.ts
@@ -35,6 +35,7 @@ export async function recordRunSafe(
     provider?: OpenWikiProvider;
     outcome: "success" | "failure" | "noop";
     errorClass?: TelemetryErrorClass;
+    openAiCompatibleBaseUrl?: string;
   },
 ): Promise<void> {
   // Chat is deliberately not recorded: it is interactive and would emit one
@@ -55,6 +56,9 @@ export async function recordRunSafe(
       ? {
           mode: outputMode === "repository" ? "code" : "personal",
           provider: facts.provider ?? "unknown",
+          ...(facts.provider === "openai-compatible"
+            ? { openAiCompatibleBaseUrl: facts.openAiCompatibleBaseUrl }
+            : {}),
           configuredConnectors: getConfiguredConnectorIds(),
         }
       : {}),
diff --git a/src/telemetry/senders.ts b/src/telemetry/senders.ts
index 4049a654..73174b11 100644
--- a/src/telemetry/senders.ts
+++ b/src/telemetry/senders.ts
@@ -52,6 +52,10 @@ export function buildRunEvent(
   details: RunTelemetry,
   context: RunEventContext,
 ): TelemetryEvent {
+  const openAiCompatibleBaseUrl = sanitizeTelemetryUrl(
+    details.openAiCompatibleBaseUrl,
+  );
+
   return {
     distinctId: context.distinctId,
     event: TELEMETRY_RUN_EVENT,
@@ -61,6 +65,9 @@ export function buildRunEvent(
       ...(details.errorClass ? { error_class: details.errorClass } : {}),
       ...(details.mode ? { mode: details.mode } : {}),
       ...(details.provider ? { provider: details.provider } : {}),
+      ...(openAiCompatibleBaseUrl
+        ? { openai_compatible_base_url: openAiCompatibleBaseUrl }
+        : {}),
       ...connectorProperties(details.configuredConnectors ?? []),
       // True for the published build, false for dev/source/seed runs; lets real
       // usage be separated from local testing and pre-launch seed data.
@@ -127,6 +134,24 @@ function connectorProperties(configured: string[]): Record<string, true> {
   );
 }
 
+function sanitizeTelemetryUrl(value: string | undefined): string | undefined {
+  if (!value) {
+    return undefined;
+  }
+
+  try {
+    const url = new URL(value);
+    url.username = "";
+    url.password = "";
+    url.search = "";
+    url.hash = "";
+
+    return url.toString();
+  } catch {
+    return undefined;
+  }
+}
+
 async function writeTelemetryFile(
   filePath: string | undefined,
   record: Record<string, unknown>,
diff --git a/src/telemetry/types.ts b/src/telemetry/types.ts
index 3e46f593..5682324d 100644
--- a/src/telemetry/types.ts
+++ b/src/telemetry/types.ts
@@ -66,6 +66,11 @@ export interface RunTelemetry {
    */
   configuredConnectors?: string[];
 
+  /**
+   * Base URL configured for the OpenAI-compatible provider. Init only.
+   */
+  openAiCompatibleBaseUrl?: string;
+
   /**
    * Optional tee target from --telemetry-file.
    */
diff --git a/test/telemetry.test.ts b/test/telemetry.test.ts
index 761c109e..35511487 100644
--- a/test/telemetry.test.ts
+++ b/test/telemetry.test.ts
@@ -31,6 +31,7 @@ import {
   isTelemetryDisabled,
   noticeSuppressed,
 } from "../src/telemetry/gates.ts";
+import { recordRunSafe } from "../src/telemetry/record-run-safe.ts";
 import { recordRun } from "../src/telemetry/senders.ts";
 import type { RunTelemetry } from "../src/telemetry/types.ts";
 
@@ -306,6 +307,71 @@ describe("recordRun connector properties", () => {
     );
   });
 
+  test("init records the sanitized OpenAI-compatible base URL", async () => {
+    await recordRunSafe(
+      "init",
+      {},
+      {
+        provider: "openai-compatible",
+        outcome: "success",
+        openAiCompatibleBaseUrl:
+          "https://user:password@gateway.example.com/v1?token=secret#fragment",
+      },
+    );
+
+    expect(runEvent().properties.openai_compatible_base_url).toBe(
+      "https://gateway.example.com/v1",
+    );
+  });
+
+  test("other providers omit OpenAI-compatible base URL telemetry", async () => {
+    await recordRunSafe(
+      "init",
+      {},
+      {
+        provider: "anthropic",
+        outcome: "success",
+        openAiCompatibleBaseUrl: "https://gateway.example.com/v1",
+      },
+    );
+
+    expect(runEvent().properties).not.toHaveProperty(
+      "openai_compatible_base_url",
+    );
+  });
+
+  test("updates omit OpenAI-compatible base URL telemetry", async () => {
+    await recordRunSafe(
+      "update",
+      {},
+      {
+        provider: "openai-compatible",
+        outcome: "success",
+        openAiCompatibleBaseUrl: "https://gateway.example.com/v1",
+      },
+    );
+
+    expect(runEvent().properties).not.toHaveProperty(
+      "openai_compatible_base_url",
+    );
+  });
+
+  test("invalid OpenAI-compatible base URLs are not sent", async () => {
+    await recordRunSafe(
+      "init",
+      {},
+      {
+        provider: "openai-compatible",
+        outcome: "failure",
+        openAiCompatibleBaseUrl: "not a url with secret-token",
+      },
+    );
+
+    expect(runEvent().properties).not.toHaveProperty(
+      "openai_compatible_base_url",
+    );
+  });
+
   test("stamps production=false when running from source (dev/test)", async () => {
     // Tests import from src/, so isProductionBuild() (dist/ check) is false;
     // the published build runs from dist/ and would send production=true.