') + ')', 'gi'); if (regex.test(text)) { found = true; var frag = document.createDocumentFragment(); var parts = text.split(regex); parts.forEach(function(part, i) { if (i % 2 === 0) { frag.appendChild(document.createTextNode(part)); } else { var span = document.createElement('span'); span.className = 'userscript-highlight'; span.textContent = part; frag.appendChild(span); } }); node.parentNode.replaceChild(frag, node); } }); } else if (node.nodeType === 1 && node.childNodes) { // element var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT']; if (!skipTags.includes(node.tagName)) { Array.from(node.childNodes).forEach(highlight); } } } highlight(document.body); // Re-highlight on dynamic content var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1 || node.nodeType === 3) highlight(node); }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ', 'i'); if (__m === '*' || __re.test(location.href)) { // Strip utm_, fbclid, gclid, etc. from all links on page (function() { var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content', 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid', 'ref', 'ref_src', 'source', 'medium', 'campaign']; function cleanUrl(url) { try { var u = new URL(url, window.location.origin); var changed = false; trackingParams.forEach(function(p) { if (u.searchParams.has(p)) { u.searchParams.delete(p); changed = true; } }); return changed ? u.toString() : url; } catch (e) { return url; } } function cleanLinks() { document.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } cleanLinks(); var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1) { if (node.tagName === 'A') cleanLinks(); node.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); } })(); (function(){ try { var __m = "youtube.com"; var __re = new RegExp('^' + "youtube\\.com" + ', 'i'); if (__m === '*' || __re.test(location.href)) { // Auto-enable theater mode on YouTube (function() { function tryTheater() { var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]'); if (btn && !btn.classList.contains('activated')) { btn.click(); } } // Try immediately tryTheater(); // Try after navigation (SPA) var lastUrl = location.href; setInterval(function() { if (location.href !== lastUrl) { lastUrl = location.href; setTimeout(tryTheater, 500); } }, 1000); // Also try on player load var observer = new MutationObserver(tryTheater); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ', 'i'); if (__m === '*' || __re.test(location.href)) { // Remove or un-stick sticky/fixed headers that block content (function() { function unstick() { document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) { if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') { el.style.position = 'static'; el.style.top = 'auto'; el.style.zIndex = 'auto'; } }); } unstick(); var observer = new MutationObserver(unstick); observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] }); })(); } } catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); } })(); })(); Verify SEP-2207: OIDC refresh token handling (already implemented via #676) · Issue #882 · modelcontextprotocol/rust-sdk · GitHub
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Verify SEP-2207: OIDC refresh token handling (already implemented via #676) #882

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#897
Closed
Verify SEP-2207: OIDC refresh token handling (already implemented via #676)#882
#897
Labels
2026-07-28P3Low: nice-to-have, long-term, or exploratoryT-securitySecurity-related changesT-testTesting related changesT-transportTransport layer changes
Milestone
2026-07-28 spec

Description

@alexhancock
alexhancock
opened on Jun 2, 2026

SEP-2207: OIDC-flavored refresh token guidance — rust-sdk impact

Spec PR:modelcontextprotocol/modelcontextprotocol#2207
Track: Specification · Stage: final · Theme: Enterprise Readiness
Needs code changes: Already implemented (verify only) — None

Summary

Guidance for MCP clients talking to OIDC-flavored authorization servers about requesting refresh
tokens via the offline_access scope, and that MCP servers should not include
offline_access in their responses. Pure additive guidance, no behavior change required.

rust-sdk status

Already implemented.crates/rmcp/src/transport/auth.rs has
AuthorizationManager::add_offline_access_if_supported(..), called from select_scopes(..), with a
comment explicitly citing SEP-2207: "when the AS advertises offline_access in scopes_supported,
append it so OIDC-flavored Authorization Servers will issue refresh tokens." It also guards against
duplicate/empty appends. The SEP itself lists rust-sdk#676 as the implementing PR.

Proposed work (verification only)

  • Confirm add_offline_access_if_supported is exercised on all token-request paths (initial auth + refresh + step-up re-auth), not just the initial one.
  • Confirm the server side does not advertise offline_access in its own scopes_supported.
  • If both hold, close as already-implemented (no new code).

Affected areas

crates/rmcp/src/transport/auth.rs (only if a gap is found on a token path).

Notes

  • Effectively a no-op beyond verification; included for release completeness.

Related work

This issue is verification-only: confirm the existing implementation satisfies the finalized SEP-2207 guidance across all token paths. Close as done if it does.

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    2026-07-28P3Low: nice-to-have, long-term, or exploratoryT-securitySecurity-related changesT-testTesting related changesT-transportTransport layer changes

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    2026-07-28 Spec Implementation
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