Document header injection for remote MCP servers #473
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Add "Inject custom headers" section to the remote server configuration guide covering the new --remote-forward-headers and --remote-forward-headers-secret flags.
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Pull request overview
This PR adds documentation for the new custom header injection feature for remote MCP servers. This feature allows users to inject custom headers into requests forwarded to remote MCP servers, with support for both plaintext values and secret-backed values from ToolHive's secrets manager.
Changes:
- Added a new "Inject custom headers" section under "Advanced remote server configuration"
- Documented the
--remote-forward-headersflag for plaintext headers - Documented the
--remote-forward-headers-secretflag for secret-backed headers - Included security warnings about storing sensitive values
- Referenced
thv proxycommand support for these flags
danbarr
requested changes
Jan 28, 2026
The thv proxy command lacks narrative documentation explaining when to use it vs thv run, so referencing it here would confuse readers.
danbarr
approved these changes
Jan 28, 2026
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Description
Add "Inject custom headers" section to the remote server configuration guide covering the new --remote-forward-headers and --remote-forward-headers-secret flags.
Type of change
Related issues/PRs
stacklok/toolhive#3452
stacklok/toolhive#3316
Screenshots
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Submitter checklist
Content and formatting
Reviewer checklist
Content