diff --git a/platform/support/faqs.mdx b/platform/support/faqs.mdx
index a14eaaf..eca8348 100644
--- a/platform/support/faqs.mdx
+++ b/platform/support/faqs.mdx
@@ -121,7 +121,7 @@ Yes, with [Enterprise](/platform/support/pricing#enterprise), which is self-host
 
 ## Still stuck
 
-Ask in [Discord](https://discord.gg/graphify). Teams and Enterprise workspaces also have a dedicated Slack support channel. For the open-source engine, open a [GitHub issue](https://github.com/Graphify-Labs/graphify/issues). Include what you ran, the exact error, and the `correlationId` from an API error if there is one.
+Ask in [Discord](https://discord.gg/graphify). Teams and Enterprise workspaces also have a dedicated Slack support channel. For the open-source engine, open a [GitHub issue](https://github.com/Graphify-Labs/graphify/issues). Include what you ran, the exact error, and the `correlationId` from an API error if there is one. If you sent `X-Request-Id` and got it back, include that as well.
 
 ## Next steps
 
diff --git a/platform/support/rate-limits.mdx b/platform/support/rate-limits.mdx
index d634948..f7130df 100644
--- a/platform/support/rate-limits.mdx
+++ b/platform/support/rate-limits.mdx
@@ -85,7 +85,7 @@ The console shows plan limits as messages:
 | **Monthly reviews used** | The plan's reviews for this month are used. |
 | **Workspace paused** | A Free workspace wasn't used for 7 days, so indexing and reviews are paused. Click **Resume** on **Repositories**. See [Inactive Free workspaces](/platform/support/pricing#inactive-free-workspaces). |
 
-Include the `correlationId` from the response, or the `X-Correlation-ID` header, when you contact support. It lets the team find your request.
+Include the `correlationId` from the response, or the `X-Correlation-ID` header, when you contact support. If your client sent `X-Request-Id` and the response echoed it, include that too. It lets the team find your request. See [Troubleshooting](/platform/support/troubleshooting) for the format and when the header is not echoed.
 
 ## Need more capacity
 
diff --git a/platform/support/troubleshooting.mdx b/platform/support/troubleshooting.mdx
index 0ee798b..ec6e53b 100644
--- a/platform/support/troubleshooting.mdx
+++ b/platform/support/troubleshooting.mdx
@@ -18,6 +18,8 @@ Every API error has the same shape. Include the `correlationId` when you contact
 }
 ```
 
+If your client sends an `X-Request-Id` header, Graphify echoes it on the response, except on publicly cached responses such as `/.well-known/*`. The value must be 1 to 128 characters from letters, digits, and `._:+=/-`. This does not replace `correlationId` or the `X-Correlation-ID` header. Include both when you contact support if you have them. Cross-origin browser callers can't use `X-Request-Id`.
+
 ## Sign-in and MCP OAuth errors
 
 ### MCP client shows "Needs login" or "needs authentication"