Code-only MCP servers — agent-tools.cloud

MCP servers that ship as code — a repository or a package you install and run locally (usually over stdio). They have no hosted endpoint, so we cannot probe or grade them: instead each one shows its repository, install command, license, stars and when it was last updated.

Collected from GitHub repositories and npm, PyPI, Cargo, Go, Maven, NuGet and RubyGems packages tagged as MCP servers, the official MCP Registry, Docker's MCP catalog, ModelScope, Baidu MCP World, Cline and other public directories; one entry per repository. A server that also offers a hosted endpoint is listed under Remote instead. These entries are not counted in our reachability, verification or readiness statistics.

nlqueries

github.com/nlqueries/nlqueries
active

Open source natural language to SQL (NL2SQL) engine with schema validation and an MCP server for Claude and Cursor

pypi NOASSERTION ★ 5
SmartDBChat

github.com/RYKK77/SmartDBChat
active

基于大语言模型的自然语言数据库查询与分析工作台（NL2SQL + 图谱 Schema Linking + AST 安全护栏 + 业务语义层 + MCP 服务中心 + RBAC 权限管理），内置 FastAPI + React 工作台，支持 DeepSeek / GLM / OpenAI / Qwen / Gemini / Ollama

MIT ★ 11
github-activity-agent

github.com/meiming2019-web/github-activity-agent
active

Verifiable NL2SQL agent: self-hosted MCP server, 3-config A/B/C experiment, deterministic offline grading, re-run noise audit (DeepSeek + DuckDB)

MIT ★ 1
DatosVivos

github.com/jsricop/DatosVivos
updated this year

Panorama nacional de datos abiertos para tomadores de decisiones + agente ciudadano NL2SQL verificado sobre +25.000 datasets de datos.gov.co (Next.js + FastAPI + ChromaDB + Claude Haiku). Concurso Datos al Ecosistema 2026, Reto 7 — ANI

MIT
mnemiq

github.com/agenticfabriq/mnemiq
active

Open-source text-to-SQL engine you tune and measure on your own database

Apache-2.0 ★ 81
dati

github.com/yimindev/dati
active

Turn your databases into secure, semantically rich MCP tools for agents.

Apache-2.0 ★ 78
nlp2sql

github.com/luiscarbonel1991/nlp2sql
active

Natural language to SQL for Python, with pluggable databases and LLM providers (OpenAI, Anthropic, Gemini). PostgreSQL and Redshift built in.

pypi MIT ★ 8
cds-db-nlquery-mcp

github.com/shahidla/cds-db-nlquery-mcp
updated this year

MCP server for natural language queries against SAP CAP db-layer entities. Schema auto-discovered from cds.model.

MIT
@asksql/mcp

github.com/rahulmahadik/asksql
active

Model Context Protocol server for AskSQL: exposes list-connections / schema / query / run as MCP tools so AI agents can safely query registered databases (read-only, guarded).

npm Apache-2.0
hs-sql-agent

github.com/tse-wei-chen/hs-sql-agent
active

.NET SQL Agent MCP server featuring raw SQL input, strict AST validation, and an embedded Admin UI. Eliminates LLM hallucinations and security risks across 6 major databases.

Apache-2.0 ★ 11
schemagate

github.com/ashishsinha1602/schemagate
active

Text-to-SQL access control: schema selection that gives the LLM only the tables the caller is allowed to read. Row-level-security-aware table pruning for LangChain, MCP and any SQL agent. Postgres, Oracle, MySQL, SQL Server. 75% fewer prompt tokens.

Apache-2.0 ★ 137
omniagent-ai-data-analyst

github.com/hoomanesteki/omniagent-ai-data-analyst
updated this year

Open source AI data analyst that answers questions about your data in plain English. Governed by a dbt semantic layer, runs locally on DuckDB, refuses to guess when it is unsure, and publishes execution accuracy on every commit. Text to SQL you can put in a board deck.

MIT ★ 1