Orionbelt Analytics
Builds RDF/OWL ontologies from relational database schemas across eight connectors including PostgreSQL, Snowflake, BigQuery, and DuckDB. The ontology includes SQL annotations that map OWL classes and properties back to actual tables, columns, and foreign keys. Exposes GraphRAG for semantic schema discovery, a SPARQL 1.1 query interface via Oxigraph, and deterministic OBQC validation that catches table/column mismatches, invalid joins, type errors, and fan traps before SQL hits the database. Also generates Plotly charts with MCP UI rendering. Reach for this when you need Text to SQL with structural guarantees, or when you want semantic layer tooling that understands relationships and prevents Cartesian products through ontology aware validation rather than hoping the LLM gets it right.
- GitHub stars
- 32
- tools
- 28
- transport
- STDIO
- last updated
- Feb 19, 2026
Tools
28 toolsPublic tool metadata for what this MCP can expose to an agent.
connect_databaseConnect to any supported database using .env credentials
Connect to any supported database using .env credentials
No parameter schema in public metadata yet.
list_databasesList the databases configured on the server, by name and description
List the databases configured on the server, by name and description
No parameter schema in public metadata yet.
list_schemasList available schemas in the connected database
List available schemas in the connected database
No parameter schema in public metadata yet.
reset_cacheClear cached schema and ontology data for the current session
Clear cached schema and ontology data for the current session
No parameter schema in public metadata yet.
discover_schemaAnalyze schema structure with automatic GraphRAG + ontology generation
Analyze schema structure with automatic GraphRAG + ontology generation
No parameter schema in public metadata yet.
get_table_detailsGet detailed column, key, and constraint info for a specific table
Get detailed column, key, and constraint info for a specific table
No parameter schema in public metadata yet.
cleanup_workspaceDelete all workspace files for the current connection and start fresh
Delete all workspace files for the current connection and start fresh
No parameter schema in public metadata yet.
generate_ontologyGenerate RDF/OWL ontology from schema with SQL mapping annotations
Generate RDF/OWL ontology from schema with SQL mapping annotations
No parameter schema in public metadata yet.
suggest_semantic_namesDetect abbreviations and cryptic names for business-friendly renaming
Detect abbreviations and cryptic names for business-friendly renaming
No parameter schema in public metadata yet.
apply_semantic_namesApply LLM-suggested semantic names and descriptions to ontology
Apply LLM-suggested semantic names and descriptions to ontology
No parameter schema in public metadata yet.
load_my_ontologyLoad a custom .ttl ontology file from an import folder
Load a custom .ttl ontology file from an import folder
No parameter schema in public metadata yet.
validate_relationshipCheck a relationship against the data and record the verdict in the ontology
Check a relationship against the data and record the verdict in the ontology
No parameter schema in public metadata yet.
download_artifactDownload ontology or R2RML mapping as a Turtle file
Download ontology or R2RML mapping as a Turtle file
No parameter schema in public metadata yet.
sample_table_dataPreview table data with row limit and injection protection
Preview table data with row limit and injection protection
No parameter schema in public metadata yet.
execute_sql_queryExecute SQL with OBQC validation, security checks, and fan-trap detection
Execute SQL with OBQC validation, security checks, and fan-trap detection
No parameter schema in public metadata yet.
generate_chartGenerate Plotly charts (bar, line, scatter, heatmap) with MCP-UI rendering
Generate Plotly charts (bar, line, scatter, heatmap) with MCP-UI rendering
No parameter schema in public metadata yet.
graphrag_searchSemantic search + schema overview (auto-initialized by discover_schema)
Semantic search + schema overview (auto-initialized by discover_schema)
No parameter schema in public metadata yet.
graphrag_query_contextGet optimized context for SQL generation (85-95% token reduction)
Get optimized context for SQL generation (85-95% token reduction)
No parameter schema in public metadata yet.
graphrag_find_join_pathDiscover join paths between tables via graph traversal
Discover join paths between tables via graph traversal
No parameter schema in public metadata yet.
reachable_fromDimension-capable tables for an anchor grain (many-to-one closure)
Dimension-capable tables for an anchor grain (many-to-one closure)
No parameter schema in public metadata yet.
measurable_fromMeasure-capable tables for an anchor grain (one-to-many closure)
Measure-capable tables for an anchor grain (one-to-many closure)
No parameter schema in public metadata yet.
plan_composite_queryAdvise a fan-trap-safe Composite Fact Layer (UNION ALL) decomposition
Advise a fan-trap-safe Composite Fact Layer (UNION ALL) decomposition
No parameter schema in public metadata yet.
store_ontology_in_rdfPersist ontology in Oxigraph for SPARQL access
Persist ontology in Oxigraph for SPARQL access
No parameter schema in public metadata yet.
query_sparqlExecute SPARQL queries (SELECT, ASK, CONSTRUCT — auto-detected)
Execute SPARQL queries (SELECT, ASK, CONSTRUCT — auto-detected)
No parameter schema in public metadata yet.
add_rdf_knowledgeAdd custom metadata triples to the RDF store
Add custom metadata triples to the RDF store
No parameter schema in public metadata yet.
save_semantic_modelSave a semantic model (e.g., OBML YAML) to the workspace
Save a semantic model (e.g., OBML YAML) to the workspace
No parameter schema in public metadata yet.
get_semantic_modelRetrieve a stored semantic model by name
Retrieve a stored semantic model by name
No parameter schema in public metadata yet.
list_semantic_modelsList all stored semantic models for the current connection
List all stored semantic models for the current connection
No parameter schema in public metadata yet.
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OrionBelt® Analytics
The Ontology-based MCP server for your Text-2-SQL convenience.
Details
- Repository
- github.com/ralfbecher/orionbelt-analytics
- Categories
- Databases, Monitoring & Observability
- Package
orionbelt-analytics- Transport
- STDIO
- Registry
- MCP registry, active
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