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.
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Pre-execution tool validation, failure prevention hints, dynamic skill selection, and agent dispatch gate MCP server.
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dev-harness-cligithub.com/bakr-bagaber/dev-harnessupdated this year
Agent-agnostic development harness for AI coding agents — gated phase pipeline with a next-step trajectory engine, built-in MCP server, craft skills library, and deterministic gate validation. Works inside Claude Code, Codex, Cursor, VS Code, and any MCP-
npm MIT -
agent-guardrailsgithub.com/logi-cmd/agent-guardrailsupdated this year
Local merge gates for AI coding agents with scope, validation, risk, and review evidence
npm MIT -
scpa-governance-centergithub.com/TolhNguyen/scpa-governance-centerupdated this year
SCPA Governance Center: a deployable control plane that provides governed, scoped service context to AI agents through MCP, REST APIs, portal UI, schema validation, CI gates, and OPA policies.
NOASSERTION -
Validation gates, plan checks, and token-budget guardrails for AI coding agents.
npm MIT -
ContextHubgithub.com/BryceEWatson/ContextHubupdated this year
Deterministic MCP server for coordinating AI agents across software development lifecycles. SQLite graph traversal, Zod validation gates, RFC 6902 patching, and 100+ tests with <200ms p95 latency.
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Eval-driven SQL reliability for AI agents — generate, validate, safely execute, and regression-test LLM SQL. MCP + FastAPI gateways, execution-truth evals, CI regression gate.
MIT ★ 3 -
cadclawgithub.com/sunnyday-technologies/cadclawupdated this year
CADCLAW: automated assembly and validation for STEP CAD. Places authored parts by declared constraints, then runs geometric, structural, tolerance, and BOM-vs-CAD gates. Includes an MCP server.
pypi MIT -
Daily, plain-language GTFS quality scorecards for small transit agencies: the grade, the three fixes that matter most, and why. 2,600+ curated Schedule and Realtime feed records (US, Canada, reviewed canaries), 2,100+ scorecards built on MobilityData's validator. Free CLI, read API, GitHub Action gate, MCP server, alerts and open data.
Apache-2.0 ★ 1 -
Multi-source clinical lab analysis pipeline: lab tests + PubMed evidence + MRI cross-validation, with DSPy dual-track LLM, quant gates and MCP server.
MIT ★ 1 -
Ask US Census data questions in plain English, with a validation gate between generated SQL and DuckDB. Includes public county pages and an MCP server.
MIT ★ 3 -
MCP server for safe, approval-gated deployments to Plesk servers: inspect a project, generate and validate a deploy kit, and check status, logs and rollback over your own SSH.
npm MIT -
MCP server for KiCad, connecting AI agents to schematic and PCB workflows, ERC/DRC validation, DFM checks, BOM analysis, and manufacturing preparation—with controlled edits and human-gated release workflows.
npm MIT ★ 217 -
The Data Control Plane for AI Agents — acquire, validate, and land data over MCP with scoped keys, approval gates, and an audit log. Self-hosted, open source.
pypi Apache-2.0 ★ 14 -
تمهيد — ground work for execution: turn a project description into a validated, execution-ready planning & handoff package for Claude Code. Relational package store (SQLite ⇄ canonical JSONL), MCP-only writes, schema-enforced quality gates, HTML review surface. Successor of Keystone.
MIT -
Deterministic power-intent intelligence for IEEE 1801 (UPF): validate, model, analyze and diff UPF before power-aware implementation. 77 rules, cross-file scope modeling, a CI quality gate, local API + web UI, and an MCP server. No EDA tool or LLM required.
MIT -
MCP server in Ruby on Rails connecting Claude to a store's products, orders, and inventory. Schema-validated tools, approval-gated writes, semantic search via Voyage AI + pgvector, and a full migration story from a legacy-SSE gem to the official MCP Ruby SDK over Streamable HTTP.
MIT -
Independent V&V for coding agents. The agent says done; Proofline re-runs every check against a contract, rejects claims the evidence does not support, and gates the push.
npm Apache-2.0 -
artefact-mcpgithub.com/alexboissav/artefact-mcp-serverupdated this year
The AI-native operational layer for HubSpot. Free tier: 9 tools (5 GTM OS builders + 4 HubSpot audit tools — lifecycle stages, pipeline hygiene, AI readiness, property governance). Pro tier: live HubSpot revenue intelligence (RFM, ICP triangulation, pipeline health) gated by Lemon Squeezy.
pypi BSL-1.1 -
kontrol-freek-mcpgithub.com/berkbayri/kontrol-freek-mcpupdated this year
AI assumption firewall for MCP agents — intercepts risky decisions, detects contradictions, and gates human approval via Telegram or Slack.
pypi MIT