{ "title": "MCP Deployment and Transport History", "schemaVersion": "1.0", "researchFreeze": "2026-08-26", "protocolRevision": "MCP 2026-07-28", "sourcePackage": "research/10", "integrityNote": "All 108 listed ordinary archive payloads verify. The package contains two incompatible numeric source namespaces; public records preserve an explicit archive namespace and never resolve IDs across families.", "evidencePolicy": "Only manually curated build_context source groups appear in sourceIds. Raw row tokens are preserved under archive and are not treated as publication citations.", "checkedAt": "2026-08-26", "count": 10, "records": [ { "Date": "2024-11-05", "Era": "Launch", "Transport/deployment": "stdio and HTTP+SSE", "State model": "Stateful connection/session", "Historical significance": "Two-endpoint SSE remote architecture; local subprocess already first-class", "Source IDs": "S019", "id": "R10-HIST001", "sourceIds": [ "S055", "S058", "S053", "S027", "S038", "S037", "S320", "S044", "S321", "S187", "S135" ], "evidenceStatus": "curated-dataset-level-evidence; not an archive row-level citation mapping", "archive": { "namespace": "research/10/deployment_history_timeline.json", "row": 1, "sourceIds": [ "S019" ], "raw": { "Date": "2024-11-05", "Era": "Launch", "Transport/deployment": "stdio and HTTP+SSE", "State model": "Stateful connection/session", "Historical significance": "Two-endpoint SSE remote architecture; local subprocess already first-class", "Source IDs": "S019" } } }, { "Date": "2024-11-25", "Era": "Public launch", "Transport/deployment": "Reference local servers and Claude Desktop", "State model": "Local-first product path", "Historical significance": "Local installation made MCP immediately usable but placed package trust on the user machine", "Source IDs": "S019 S011", "id": "R10-HIST002", "sourceIds": [ "S055", "S058", "S053", "S027", "S038", "S037", "S320", "S044", "S321", "S187", "S135" ], "evidenceStatus": "curated-dataset-level-evidence; not an archive row-level citation mapping", "archive": { "namespace": "research/10/deployment_history_timeline.json", "row": 2, "sourceIds": [ "S019", "S011" ], "raw": { "Date": "2024-11-25", "Era": "Public launch", "Transport/deployment": "Reference local servers and Claude Desktop", "State model": "Local-first product path", "Historical significance": "Local installation made MCP immediately usable but placed package trust on the user machine", "Source IDs": "S019 S011" } } }, { "Date": "2025-03-26", "Era": "Remote expansion", "Transport/deployment": "stdio and Streamable HTTP", "State model": "Initialize + optional sessions", "Historical significance": "Single HTTP endpoint and OAuth framework made remote services more practical", "Source IDs": "S020 S021", "id": "R10-HIST003", "sourceIds": [ "S055", "S058", "S053", "S027", "S038", "S037", "S320", "S044", "S321", "S187", "S135" ], "evidenceStatus": "curated-dataset-level-evidence; not an archive row-level citation mapping", "archive": { "namespace": "research/10/deployment_history_timeline.json", "row": 3, "sourceIds": [ "S020", "S021" ], "raw": { "Date": "2025-03-26", "Era": "Remote expansion", "Transport/deployment": "stdio and Streamable HTTP", "State model": "Initialize + optional sessions", "Historical significance": "Single HTTP endpoint and OAuth framework made remote services more practical", "Source IDs": "S020 S021" } } }, { "Date": "2025-06-18", "Era": "Security hardening", "Transport/deployment": "Streamable HTTP session era", "State model": "Protected resource metadata and Resource Indicators", "Historical significance": "Remote authorization and token audience became more precise", "Source IDs": "S022 S023 S024", "id": "R10-HIST004", "sourceIds": [ "S055", "S058", "S053", "S027", "S038", "S037", "S320", "S044", "S321", "S187", "S135" ], "evidenceStatus": "curated-dataset-level-evidence; not an archive row-level citation mapping", "archive": { "namespace": "research/10/deployment_history_timeline.json", "row": 4, "sourceIds": [ "S022", "S023", "S024" ], "raw": { "Date": "2025-06-18", "Era": "Security hardening", "Transport/deployment": "Streamable HTTP session era", "State model": "Protected resource metadata and Resource Indicators", "Historical significance": "Remote authorization and token audience became more precise", "Source IDs": "S022 S023 S024" } } }, { "Date": "2025-09-08", "Era": "Distribution", "Transport/deployment": "Official Registry preview", "State model": "Packages and remote endpoints", "Historical significance": "Discovery began to separate protocol interoperability from software distribution", "Source IDs": "S017 S018", "id": "R10-HIST005", "sourceIds": [ "S055", "S058", "S053", "S027", "S038", "S037", "S320", "S044", "S321", "S187", "S135" ], "evidenceStatus": "curated-dataset-level-evidence; not an archive row-level citation mapping", "archive": { "namespace": "research/10/deployment_history_timeline.json", "row": 5, "sourceIds": [ "S017", "S018" ], "raw": { "Date": "2025-09-08", "Era": "Distribution", "Transport/deployment": "Official Registry preview", "State model": "Packages and remote endpoints", "Historical significance": "Discovery began to separate protocol interoperability from software distribution", "Source IDs": "S017 S018" } } }, { "Date": "2025-11-20", "Era": "Local distribution", "Transport/deployment": "MCP Bundles", "State model": "Packaged local runtime", "Historical significance": "One-click local installation gained a portable package format", "Source IDs": "S014 S015", "id": "R10-HIST006", "sourceIds": [ "S055", "S058", "S053", "S027", "S038", "S037", "S320", "S044", "S321", "S187", "S135" ], "evidenceStatus": "curated-dataset-level-evidence; not an archive row-level citation mapping", "archive": { "namespace": "research/10/deployment_history_timeline.json", "row": 6, "sourceIds": [ "S014", "S015" ], "raw": { "Date": "2025-11-20", "Era": "Local distribution", "Transport/deployment": "MCP Bundles", "State model": "Packaged local runtime", "Historical significance": "One-click local installation gained a portable package format", "Source IDs": "S014 S015" } } }, { "Date": "2025-11-25", "Era": "Late handshake era", "Transport/deployment": "stdio and Streamable HTTP", "State model": "Sessions, GET stream, resumability", "Historical significance": "Remote infrastructure still needed session-aware operation in some patterns", "Source IDs": "S025 S026 S027", "id": "R10-HIST007", "sourceIds": [ "S055", "S058", "S053", "S027", "S038", "S037", "S320", "S044", "S321", "S187", "S135" ], "evidenceStatus": "curated-dataset-level-evidence; not an archive row-level citation mapping", "archive": { "namespace": "research/10/deployment_history_timeline.json", "row": 7, "sourceIds": [ "S025", "S026", "S027" ], "raw": { "Date": "2025-11-25", "Era": "Late handshake era", "Transport/deployment": "stdio and Streamable HTTP", "State model": "Sessions, GET stream, resumability", "Historical significance": "Remote infrastructure still needed session-aware operation in some patterns", "Source IDs": "S025 S026 S027" } } }, { "Date": "2026-05-29", "Era": "Stateless RC", "Transport/deployment": "Modern Streamable HTTP proposal", "State model": "No protocol sessions", "Historical significance": "Explicitly targeted sticky-session and shared-session-store scaling problems", "Source IDs": "S009", "id": "R10-HIST008", "sourceIds": [ "S055", "S058", "S053", "S027", "S038", "S037", "S320", "S044", "S321", "S187", "S135" ], "evidenceStatus": "curated-dataset-level-evidence; not an archive row-level citation mapping", "archive": { "namespace": "research/10/deployment_history_timeline.json", "row": 8, "sourceIds": [ "S009" ], "raw": { "Date": "2026-05-29", "Era": "Stateless RC", "Transport/deployment": "Modern Streamable HTTP proposal", "State model": "No protocol sessions", "Historical significance": "Explicitly targeted sticky-session and shared-session-store scaling problems", "Source IDs": "S009" } } }, { "Date": "2026-07-28", "Era": "Modern GA", "Transport/deployment": "stdio and modern Streamable HTTP", "State model": "Self-describing requests", "Historical significance": "Plain round-robin routing, headers, caching, MRTR and explicit state handles", "Source IDs": "S007 S008", "id": "R10-HIST009", "sourceIds": [ "S055", "S058", "S053", "S027", "S038", "S037", "S320", "S044", "S321", "S187", "S135" ], "evidenceStatus": "curated-dataset-level-evidence; not an archive row-level citation mapping", "archive": { "namespace": "research/10/deployment_history_timeline.json", "row": 9, "sourceIds": [ "S007", "S008" ], "raw": { "Date": "2026-07-28", "Era": "Modern GA", "Transport/deployment": "stdio and modern Streamable HTTP", "State model": "Self-describing requests", "Historical significance": "Plain round-robin routing, headers, caching, MRTR and explicit state handles", "Source IDs": "S007 S008" } } }, { "Date": "2026-08-26", "Era": "Research freeze", "Transport/deployment": "Mixed modern and legacy ecosystem", "State model": "Dual-era operation remains common", "Historical significance": "Hosts and cloud gateways support combinations of local/remote and multiple protocol revisions", "Source IDs": "S031 S037 S039 S042 S048 S052", "id": "R10-HIST010", "sourceIds": [ "S055", "S058", "S053", "S027", "S038", "S037", "S320", "S044", "S321", "S187", "S135" ], "evidenceStatus": "curated-dataset-level-evidence; not an archive row-level citation mapping", "archive": { "namespace": "research/10/deployment_history_timeline.json", "row": 10, "sourceIds": [ "S031", "S037", "S039", "S042", "S048", "S052" ], "raw": { "Date": "2026-08-26", "Era": "Research freeze", "Transport/deployment": "Mixed modern and legacy ecosystem", "State model": "Dual-era operation remains common", "Historical significance": "Hosts and cloud gateways support combinations of local/remote and multiple protocol revisions", "Source IDs": "S031 S037 S039 S042 S048 S052" } } } ] }