Semantic Layer Python Packages

metricflow

MetricFlow allows you to define, build, and maintain metrics in code.

dbt-metricflow

MetricFlow allows you to define, build, and maintain metrics in code.

dqtlib

A Data Quality Tool that tells you what and surfaces the why

agentic-data-contracts

YAML-first, domain-driven data governance for AI agents — teach agents your business domains, metrics, and rules before they write SQL

motley-slayer

SLayer: a lightweight semantic layer for AI agents and humans

orionbelt-semantic-layer-mcp

MCP server for the OrionBelt Semantic Layer — enables LLMs to explore semantic models, compile queries, and execute analytics via natural language.

databao-context-engine

Databao Context Engine is an open-source engine that automatically generates a governed semantic context from your databases, BI tools, documents, and spreadsheets. It runs locally in your environment and integrates with any LLM to deliver accurate, context-aware answers

orionbelt-analytics

Ontology-based MCP server that analyzes database schemas (PostgreSQL, Snowflake, ClickHouse, Dremio) and generates RDF/OWL ontologies with SQL mappings for fan-trap-free Text-to-SQL.

zillion

Make sense of it all. Semantic data modeling and analytics with a sprinkle of AI. https://totalhack.github.io/zillion/

databao

Databao agent is an open-source agent that enables you to chat with your data and receive answers in text, interactive charts, and tables.

driftdb

Metrics Observability & Troubleshooting

databao-agent

Databao agent is an open-source agent that enables you to chat with your data and receive answers in text, interactive charts, and tables.

intugle

The GenAI-powered toolkit for automated data intelligence.

datagit

Metrics Observability & Troubleshooting

boyce

Privacy-first SQL compiler and open semantic protocol exposed as an MCP server

sz-semantics

Transform JSON output from Senzing SDK for use with graph technologies, semantics, and downstream LLM integration

dbt-snapshot-analysis

Metrics Observability & Troubleshooting

metricflow-klook-data

MetricFlow allows you to define, build, and maintain metrics in code.

lamisema

Structured Information Extraction for Nepali and multilingual PDFs

agentic-slayer

SLayer: a lightweight semantic layer for AI agents and humans

ora-sql

ora — The NL2SQL Agentic Runtime. Connect any database. Ask in plain English.

semanticslayer

SLayer: a lightweight semantic layer for AI agents and humans

in-metricflow

MetricFlow allows you to define, build, and maintain metrics in code.