Keystone
runafterasun/keystone-core
C4 architecture model of your system, built from code by your AI and read back as focused context.
- tools
- 10
- auth
- Secret needed
- transport
- HTTP
- last updated
- Nov 10, 2026
Tools
10 toolsPublic tool metadata for what this MCP can expose to an agent.
search_architectureElements and tables by name, role or module, with IDs and ready reads for the hits
Elements and tables by name, role or module, with IDs and ready reads for the hits
No parameter schema in public metadata yet.
get_architectureThe whole model as a short map, one module or chosen elements in full
The whole model as a short map, one module or chosen elements in full
No parameter schema in public metadata yet.
traverse_architectureWhat depends on an element and what it depends on, to a chosen depth
What depends on an element and what it depends on, to a chosen depth
No parameter schema in public metadata yet.
analyze_impactWhat a change of an element or table affects, with reasons and paths
What a change of an element or table affects, with reasons and paths
No parameter schema in public metadata yet.
find_architecture_pathThe chain of calls and data access between two elements
The chain of calls and data access between two elements
No parameter schema in public metadata yet.
get_architecture_deltaOnly what changed since a version of the model
Only what changed since a version of the model
No parameter schema in public metadata yet.
find_antipattern_candidatesShared databases, cycles of synchronous calls, overloaded services
Shared databases, cycles of synchronous calls, overloaded services
No parameter schema in public metadata yet.
propose_changesA proposal becomes a branch that a person reviews and merges
A proposal becomes a branch that a person reviews and merges
No parameter schema in public metadata yet.
report_validationReports checks of the diagram against the code
Reports checks of the diagram against the code
No parameter schema in public metadata yet.
report_antipatternsReports antipattern findings
Reports antipattern findings
No parameter schema in public metadata yet.
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Keystone
Understand your system before you change it.
Keystone keeps a C4 model of your software: systems, services, components with their public API, databases down to tables and columns, scenarios and architecture decisions. Your AI coding assistant builds the model from the code in your environment, keeps it in step with the code and reads it back over MCP as context for its next task. Every change arrives as a branch that your team reviews.
- Website: https://keystone-core.pro
- Live demo, no sign-up: https://keystone-core.pro/demo
- Guide: https://keystone-core.pro/docs
- MCP server:
https://keystone-core.pro/mcp(Streamable HTTP, bearer token)
This repository holds no source code: it is the public home of Keystone for its MCP server, docs links and feedback.
The Keystone editor: a service with its components and labelled relationshipsWhat it does
Details
- Repository
- github.com/runafterasun/keystone-core
- Website
- keystone-core.pro
- Transport
- HTTP
- Auth
- Required
- Registry
- MCP registry, active