MCP Inspector 2.1.0 mirrors SEP-2243 x-mcp-header arguments to Mcp-Param-* on tools/call
The reference MCP Inspector published 2.1.0. The one functional protocol change is a fix implementing SEP-2243 header mirroring; the rest is repository hygiene restoring files dropped in the project's v2 tree swap plus dependency work clearing two advisories.
The reference MCP Inspector published release 2.1.0 on August 5
(2026-08-05T15:51:47Z), authored by cliffhall, not a prerelease. The
release notes contain a fix implementing SEP-2243 header mirroring:
"fix(core): mirror SEP-2243 x-mcp-header args to Mcp-Param-* on
tools/call", from PR #1847 by SamMorrowDrums.
Other notes cover dependency work (eslint 10 to clear a brace-expansion
DoS advisory; untangling vitest and Storybook pins to clear
GHSA-p63j-vcc4-9vmv) and restoring files lost in the project's v2 tree
swap, including SECURITY.md, the Claude Code workflow, and .mcp.json.
Tag 1.0.1, titled "1.0.1 - v1 deprecated" and published
2026-07-28T01:36:01Z, sits just outside this window.
Related spec revisions
- MCP 2026-07-28 - current
How was this verified, and what are the sources?
Published · last verified · confidence 0.90.