WinCC V8 MCP Server
MCP server providing access to Siemens WinCC V8 SCADA systems via REST API, enabling tag management, alarm logging, and archive operations.
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The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.
These names and descriptions are the publisher's own, read from the source code. We print them as written. Our assessment is the findings above, not this list.
login-userLogs a user in to WinCC using username and password. Stores the session credentials for subsequent requests. It is optional, because the MCP server could be started in the way that it is doing automatically a logon with the service account.
wincc-get-connectionsReads configuration data of all connections in Tag Management. Base URL: /tagManagement. Endpoint: Connections. According to WinCC REST docs, returns connections created below communication drivers; supports paging via itemLimit and continuationPoint.
wincc-get-connectionRead configuration data of a specific connection
wincc-get-groupsRead configuration data of all tag groups
wincc-get-groupRead configuration data of a specific tag group
wincc-get-structure-typesRead configuration data of all structure types
wincc-get-structure-typeRead configuration data of a specific structure type
wincc-get-structure-variablesRead instances of structure types
wincc-get-tag-valueRead runtime value of a specific tag
wincc-get-tag-valuesRead runtime values of multiple tags
wincc-write-tag-valueWrite a value to a specific tag
wincc-write-tag-valuesWrite values to multiple tags
wincc-get-tag-configRead configuration data of a specific tag
wincc-get-tags-configRead configuration data of all tags
wincc-get-archivesRead configuration data of all process value archives
wincc-get-archiveRead configuration data of a specific process value archive
wincc-get-archive-variableRead configuration data of a specific archive variable
wincc-get-archive-variablesRead configuration data of all variables in an archive
wincc-get-archive-valueRead runtime value of an archive variable
wincc-get-archive-valuesRead runtime values of multiple archive variables
wincc-get-timersRead configuration data of all archive system timers
wincc-get-timerRead configuration data of a specific archive system timer
wincc-get-archive-tagRead configuration data of an archive system tag
wincc-get-archive-tagsRead configuration data of all archive system tags
wincc-get-alarm-message-classesLists message classes. GET /alarmLogging/MessageClasses with optional paging (itemLimit, continuationPoint). Use Accept-Language for response language and Content-Language for name resolution.
wincc-get-alarm-message-classReads a message class. GET /alarmLogging/MessageClass/{messageClassName}. Use Accept-Language for response language and Content-Language for identifier resolution.
wincc-get-alarm-message-typesLists message types. GET /alarmLogging/MessageTypes with optional paging (itemLimit, continuationPoint). Use Accept-Language for response language and Content-Language for identifier resolution.
wincc-get-alarm-message-typeReads a message type. GET /alarmLogging/MessageType/{messageTypeName}. Use Accept-Language for response language and Content-Language for identifier resolution.
wincc-get-alarm-message-blocksLists message blocks. GET /alarmLogging/MessageBlocks with optional paging (itemLimit, continuationPoint). Use Accept-Language for response language and Content-Language for identifier resolution.
wincc-get-alarm-message-blockReads a message block. GET /alarmLogging/MessageBlock/{messageBlockName}. Use Accept-Language for response language and Content-Language for identifier resolution.
wincc-get-alarm-messagesLists messages. GET /alarmLogging/Messages with optional paging (itemLimit, continuationPoint). Use Accept-Language for response language and Content-Language for identifier resolution.
wincc-get-alarm-messageReads a message. GET /alarmLogging/Message/{messageNumber}. Use Accept-Language for response language and Content-Language for identifier resolution.
wincc-get-alarm-limit-valuesLists limit values. GET /alarmLogging/LimitValues with optional paging (itemLimit, continuationPoint). Use Accept-Language for response language and Content-Language for identifier resolution.
wincc-get-alarm-limit-valueReads limit values for a tag. GET /alarmLogging/LimitValue/{tagName}. Use Accept-Language for response language and Content-Language for identifier resolution.
wincc-get-alarm-message-groupsLists message groups. GET /alarmLogging/MessageGroups with optional paging (itemLimit, continuationPoint). Use Accept-Language for response language and Content-Language for identifier resolution.
wincc-get-alarm-message-groupReads a message group. GET /alarmLogging/MessageGroup/{messageGroupName}. Use Accept-Language for response language and Content-Language for identifier resolution.
wincc-get-alarm-rest-filtersLists configured REST filters. GET /alarmLogging/RestFilters. Use Accept-Language for response language and Content-Language for identifier resolution.
wincc-get-alarm-rest-filterReads a REST filter. GET /alarmLogging/RestFilter/{filterName}. Use Accept-Language for response language and Content-Language for identifier resolution.
wincc-get-alarm-message-listMessageList
wincc-get-alarm-short-term-archiveShortTermArchive
wincc-get-alarm-long-term-archiveLongTermArchive
wincc-get-alarm-hit-listHitList
wincc-get-alarm-lock-listLockList
wincc-get-alarm-hide-listHidelist
wincc-get-alarm-hidden-message-listHiddenMessageList
Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse
Anthropic's MCP TypeScript SDK has a ReDoS vulnerability
Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default
WINCC_ALLOW_ORIGINCORS Configuration: Use to restrict allowed origins in productionWINCC_BEARER_TOKENWINCC_PWDWINCC_SKIP_CERTIFICATE_VALIDATIONWINCC_URLWINCC_USRPORTTool annotations
No tools have read-only/destructive annotations
Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.
All four hints declared on every tool
45/45 tools missing one or more hints — login-user (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); wincc-get-connections (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); wincc-get-connection (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +42 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.
For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.
Tests exist
No test files found
Add tests that exercise each declared tool.
Secrets not logged
1 secret value sent to log
Redact or omit secret values from log output.
Production dependencies are patched
0 critical, 3 high severity in production deps — @modelcontextprotocol/sdk@1.13.1 (high), @modelcontextprotocol/sdk@1.13.1 (high)
Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.
Dependency freshness
1/6 production deps stale: node-fetch@2023-11-30 (2.8y)
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