LibreChat/api/app
J.C. Bartle 6e46fbbb59 🧊 fix: Inline-refresh OpenID session tokens at MCP OBO call time
Resolves the walk-away failure mode where MCP tool calls using OBO auth
fail with "No valid OpenID access token is available for OBO exchange"
after a user idles past their access-token lifetime. The strategy-time
snapshot on `user.federatedTokens` could expire mid-stream before
`resolveOboToken` ran, while `req.session.openidTokens` carried a still-
valid (or refreshable) token that nothing read.

- New OpenIDSessionRefresh service: per-user single-flighted closure that
  reads `req.session.openidTokens` at OBO time and inline-refreshes via
  `openid-client.refreshTokenGrant` when expired (30s skew), persisting
  via `req.session.save()`. No cookie writes (headers already flushed).
- `resolveOboToken` gains a required UpstreamTokenProvider parameter
  (typed as `() => Promise<OIDCTokens | null>`, reusing the shared shape
  from @librechat/data-schemas). Compile-time guarantee that every call
  site is updated.
- New `session_refresh_failed` OboTokenResolutionReason distinguishes
  "session expired and IdP rejected refresh" from "no upstream token
  ever existed."
- `req` threaded through createMCPTool/createMCPTools/createToolInstance
  to construct the closure with captured request, plus fail-closed
  guards in MCPConnectionFactory.getOboTokens and MCPManager.callTool
  when the closure isn't plumbed.
- Startup warning in MCPServersInitializer when OBO is configured but
  OPENID_REUSE_TOKENS is unset (the strategy populating
  user.federatedTokens is only registered under reuse, so OBO would
  fail every call without it).

Tests: 16 new in OpenIDSessionRefresh.spec.js; obo.spec.ts extended
for the new param + error reason; wiring smoke tests in MCPManager,
MCPConnectionFactory, MCPServersInitializer, and MCP.spec.js.
2026-06-11 21:36:04 -04:00
..
clients 🧊 fix: Inline-refresh OpenID session tokens at MCP OBO call time 2026-06-11 21:36:04 -04:00
index.js 🛠️ fix: Optionally add OpenID Sig. Algo. from Server Discovery (#5398) 2025-01-21 21:49:27 -05:00