Worked on the LibreChat repository to deliver secure and resilient handling of MCP streamable HTTP transport redirects. Focused on implementing support for 307 and 308 method-preserving redirects, the work included robust SSRF-safe validation for redirect targets and careful stripping of sensitive headers such as Authorization and Cookie during cross-origin hops. Using JavaScript and Node.js, the developer ensured that request methods, bodies, and abort signals were preserved throughout the redirect chain, while also expanding test coverage to guard against regressions. Emphasis was placed on HTTP protocol compliance and security best practices, resulting in improved stability and protection against credential leaks.