{ "schema": "varexis-index-free-publication-preview/1", "catalogue_version": "ice-09-tranche-68-v1", "route_id": "agentic_reviewed_mcp_multiple_issuers_separate_registration_state", "record_id": "VXI-EXT-ICE09-MCP-MULTIPLE-ISSUERS-SEPARATE-REGISTRATION-STATE-01-v1", "question": "Can MCP credentials carry over to another advertised authorization server?", "answer": "Do not assume so. MCP 2026-07-28 requires separate registration state for each authorization server and association of credentials and tokens with the issuing server. An advertised alternative issuer does not establish that it accepts another issuer's credentials.", "records": [ { "record_id": "VXI-EXT-ICE09-MCP-MULTIPLE-ISSUERS-SEPARATE-REGISTRATION-STATE-01-v1", "url": "/varexis-index/records/mcp-multiple-issuers-separate-registration-state.json", "content_sha256": "3ebbcd3d544c31afb8007b96802df33d3ea1bb05e34b907b69f38dfac25910a0", "evidence": { "schema": "varexis-public-evidence-record/0.3", "generated_at_utc": "2026-10-30T15:17:58.235744+00:00", "record_id": "VXI-EXT-ICE09-MCP-MULTIPLE-ISSUERS-SEPARATE-REGISTRATION-STATE-01-v1", "record_kind": "external_reference", "title": "Can MCP credentials carry over to another advertised authorization server", "system": "Model Context Protocol", "evidence_family": "vendor_evidence_review", "index_status": "PUBLIC_SAFE_SOURCE_REVIEW", "evidence_state": "PRIMARY_DOCUMENTATION_REVIEW_ONLY", "canonical_question": "Can MCP credentials carry over to another advertised authorization server?", "near_questions": [ "Can two advertised MCP issuers share client registration state?", "Should cached credentials be keyed by authorization server?", "What happens when the selected issuer changes?", "Can a token from one issuer be reused at another advertised server?" ], "supported_claims": [ { "claim": "Do not assume so. MCP 2026-07-28 requires separate registration state for each authorization server and association of credentials and tokens with the issuing server. An advertised alternative issuer does not establish that it accepts another issuer's credentials.", "reliance": "DOCUMENTED_CAPABILITY_ONLY" } ], "not_demonstrated_claims": [ "Require issuer-specific registration and authorization evidence before reuse.", "Buyer implementation, live runtime enforcement, settled payment, verified deletion or certification are not established.", "No expanded capabilities or licences for existing INDEX executables." ], "public_summary": "Do not assume so. MCP 2026-07-28 requires separate registration state for each authorization server and association of credentials and tokens with the issuing server. An advertised alternative issuer does not establish that it accepts another issuer's credentials.", "related_record_ids": [], "source_review": { "source_type": "official_external_documentation", "source_title": "Model Context Protocol primary documentation: mcp authorization server discovery", "source_url": "https://modelcontextprotocol.io/specification/2026-07-28/basic/authorization/authorization-server-discovery.md", "checked_on": "2026-10-30", "candidate_record_id": "VXI-EXT-ICE09-MCP-MULTIPLE-ISSUERS-SEPARATE-REGISTRATION-STATE-01-v1", "candidate_record_sha256": "e9fc99dd0a9151477126771c2cf5dfa6fd1493fdb502976d7e3330384304cb92", "method": "Primary documentation reviewed for the published bounded statement.", "deployment_tested_by_varexis": false, "revalidation": "The delivered snapshot preserves the review date shown. Recheck current primary documentation and deployment context before relying on present applicability; payment does not trigger fresh research." }, "answer_policy": { "classification": "DOCUMENTED_WITH_DEPLOYMENT_BOUNDARY", "bounded_answer": "Do not assume so. MCP 2026-07-28 requires separate registration state for each authorization server and association of credentials and tokens with the issuing server. An advertised alternative issuer does not establish that it accepts another issuer's credentials.", "required_buyer_context": "resource metadata; selected issuer; registration; token issuer summary. Buyer deployment not inspected.", "missing_evidence": "A broader claim needs evidence matching the intended use. Payment does not upgrade the evidence state." }, "private_boundary": "Raw logs, thresholds, private paths, source code, protected mechanisms and reconstruction-level details are excluded from public and paid delivery.", "decision_profile": { "schema": "varexis-vendor-evidence-review/1", "review_status": "documentation_review_only", "applicability_status": "Existing documented requirement; captured 2026-10-30; deployed behaviour unverified.", "checked_on": "2026-10-30", "claim_to_check": "Can MCP credentials carry over to another advertised authorization server?", "documented_statement": { "status": "documented", "statement": "Do not assume so. MCP 2026-07-28 requires separate registration state for each authorization server and association of credentials and tokens with the issuing server. An advertised alternative issuer does not establish that it accepts another issuer's credentials.", "source_ids": [ "mcp-authorization-server-discovery" ] }, "review_inference": { "status": "review_inference", "statement": "Can MCP credentials carry over to another advertised authorization server? Require issuer-specific registration and authorization evidence before reuse. Registration continuity differs from resource audience. This is an operational review inference, not an observed deployment outcome.", "source_ids": [ "mcp-authorization-server-discovery" ] }, "buyer_evidence_required": [ "resource metadata", "selected issuer", "registration", "token issuer summary" ], "review_condition": { "status": "varexis_review_policy", "statement": "Require issuer-specific registration and authorization evidence before reuse." }, "unknowns": "The buyer implementation, effective authority, source-data completeness and actual business outcomes were not inspected.", "unknown_finding": { "status": "unknown", "statement": "No buyer deployment or transaction was observed." }, "evidence_sources": [ { "source_id": "mcp-authorization-server-discovery", "url": "https://modelcontextprotocol.io/specification/2026-07-28/basic/authorization/authorization-server-discovery.md", "final_url": "https://modelcontextprotocol.io/specification/2026-07-28/basic/authorization/authorization-server-discovery.md", "captured_at_utc": "2026-10-30T14:26:17.557068+00:00", "status": 200, "content_type": "text/markdown; charset=utf-8", "bytes": 8186, "sha256": "f36d3290ba947feeb44a2afe264ec88f50925e47315f001e04a6a6302362f5b7", "title": "Model Context Protocol primary documentation: mcp authorization server discovery", "publisher": "Model Context Protocol", "checked_on": "2026-10-30", "capture_status": 200, "claim_review_completed": true, "hash_basis": "SHA-256 of captured HTTP response-body bytes; not a signature or factual guarantee.", "version_context": "Existing documented requirement; captured 2026-10-30; deployed behaviour unverified.", "rights_disposition": "Original bounded paraphrase with source attribution. Captured source body remains private; no source-body redistribution. Vendor documentation rights, code licences and marks are not transferred.", "reviewed_sections": [ "separate registration state", "For issuer URLs with path components" ] } ], "observed_deployment": false, "commercial_reliance_boundary": "Documentation supports only the stated boundary. Existing licensed checkers analyse supported supplied declarations locally; they do not inspect provider accounts, verify live behaviour, enforce decisions or certify compliance.", "paid_value": { "decision_context": "Can MCP credentials carry over to another advertised authorization server? Require issuer-specific registration and authorization evidence before reuse.", "free": "Complete source review, questions, provenance and limitations; free to read and save locally.", "single_request": "Unavailable for this publication-only record; historical saved retrieval is unchanged.", "evidence_receipt": "Unavailable for this publication-only record; no paid retrieval entitlement is added.", "excluded": [ "Fresh source research", "Native provider integration or schema support", "Live inspection or runtime enforcement", "Payment settlement or verified deletion", "Certification or expanded licences" ], "integrity": "Hashes identify content versions; they do not prove factual truth or provide a signature." }, "revalidation": { "trigger": "Recheck current primary documentation and the applicable API, service, account and configuration before reliance. No ongoing monitoring is included.", "specific_watch": "separate registration state" }, "buyer_relevance": "Can MCP credentials carry over to another advertised authorization server? Require issuer-specific registration and authorization evidence before reuse.", "refusal_conditions": [ "Require issuer-specific registration and authorization evidence before reuse.", "Do not infer deployment conformance, authority or successful outcomes from source documentation." ], "decision_context": { "operator": "Identity administrator or delegated-access reviewer", "scenario": "Can MCP credentials carry over to another advertised authorization server?", "consequence": "Require issuer-specific registration and authorization evidence before reuse.", "confidence": "High for the explicitly bounded captured clause; conflicts and version limits retained; deployment untested." }, "novelty_review": { "candidate_id": "ICE09-033", "disposition": "EXTENSION", "nearest_record_id": "VXI-EXT-PROCUREMENT-OAUTH-AUTHORIZATION-RESPONSE-ISSUER-COMPARISON-01-v1", "nearest_record_url": "/varexis-index/records/oauth-authorization-response-issuer-comparison.json", "nearest_record_sha256": "d78881114f3dad5ead1fb4fd357ee7b754cb4230fb3b383a20ee4d41a84f4369", "material_distinction": "Registration continuity differs from resource audience.", "review_status": "PASS: source qualification plus independent reviewer challenge and resolved corrections" }, "optional_selection": { "guide_id": "delegated-agent-identity-continuity", "guide_url": "/index-guides/delegated-agent-identity-continuity", "guide_manifest": "/varexis-index/decision-guides.json", "checker": { "product_id": "agent-tool-admission", "price_gbp_excluding_vat": 49, "purchase_url": "/index-access?route=agentic_pack_tool_admission_v1", "licence_scope": "Existing separate internal-use licence; subscriptions do not include the executable.", "benefit": "Optional local analysis of supported supplied declarations only; no native provider integration or verification is added." }, "boundary": "Optional existing checker analyses its supported supplied declarations locally. It does not connect to the documented provider, import native provider exports, verify tokens, establish live outcomes or extend its schema or licence." }, "exact_access": { "endpoint": "/mcp/catalogue", "tool": "get_publication_record", "arguments": { "record_id": "VXI-EXT-ICE09-MCP-MULTIPLE-ISSUERS-SEPARATE-REGISTRATION-STATE-01-v1" }, "record_url": "/varexis-index/records/mcp-multiple-issuers-separate-registration-state.json", "original_mcp_search": false, "paid_saved_retrieval": false } }, "niche": { "niche_id": "ice09-identity", "label": "Agent Identity, Credentials & Delegation", "classification_id": "identity", "classification_label": "Agent Identity, Credentials & Delegation", "topic_id": "identity", "buyer_intent": "Can MCP credentials carry over to another advertised authorization server? Require issuer-specific registration and authorization evidence before reuse.", "comparison_role": "supplementary_discovery" }, "paid_access_note": "The full published answer and boundaries are free. Paid access saves the selected route and source versions, with an unsigned receipt when purchased. Preview coverage before paying. Fresh research, bespoke assessment and protected evidence are excluded.", "service_route": { "request_guide": "/varexis-index/request.html", "request_workflow": "/varexis-index/request-workflow.json", "service_id": "single_request", "service_routes_url": "/varexis-index/service-routes.json", "payment_required": true, "availability_endpoint": "/api/index/capabilities", "operational_status": "AUTOMATIC_SERVICE_CAPABILITIES_GATED", "checkout_url": "/index-access" }, "authority_boundary": "VAREXIS-INDEX informs evidence reliance. It does not provide advice, certification, deployment authority, security assurance, production approval, or guarantee.", "human_page": "/varexis-index/catalog.html#mcp-multiple-issuers-separate-registration-state", "machine_readable_record": "/varexis-index/records/mcp-multiple-issuers-separate-registration-state.json" } } ], "access": { "mode": "exact_http_only", "payment_required": false, "purchase_url": null, "mcp_preview_available": false, "paid_saved_retrieval_available": false, "natural_language_search_qualified": false }, "boundary": "Catalogue additions are available free through the exact HTTP JSON links below. Enhanced natural-language discovery is not yet qualified for these records. They are outside MCP search, MCP preview and paid saved retrieval. No search qualification, executable capability or entitlement is added.", "content_sha256": "8627f52a697907d0594404aaebd31c5e48396277be66aa2a05798c7882c7b7a6" }