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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config-validator-ai-mcpgithub.com/csoai-org/config-validator-ai-mcpupdated this year
Config Validator Ai automation via MCP. Includes validate toml, validate ini, validate dotenv. By MEOK AI Labs.
pypi MIT License -
validator-ai-mcpgithub.com/csoai-org/validator-ai-mcpupdated this year
AI-powered validator ai MCP server for agents. Supports validate json, validate email, validate url. By MEOK AI Labs.
npm MIT -
@mukundakatta/validate-mcpgithub.com/mukundakatta/validate-mcpupdated this year
MCP server: validate JSON against a JSON Schema (draft-07) with detailed error paths.
npm MIT -
A MCP server exposing lean-package-validator commands as tools.
MIT ★ 1 -
schema-validator-ai-mcpgithub.com/csoai-org/schema-validator-ai-mcpupdated this year
Schema Validator Ai automation via MCP. Includes validate json schema, generate schema, convert openapi. By MEOK AI Labs.
pypi MIT License -
email-validator-ai-mcpgithub.com/csoai-org/email-validator-ai-mcpupdated this year
MCP server for email validator ai. Features validate email, check mx, detect disposable. From MEOK AI Labs.
pypi MIT License -
Independent continuation of rtuin/mcp-mermaid-validator with WSL stdin fix and active maintenance.
MIT -
@bimatrix-aud-platform/mcp-mtsd-validatorupdated this year
MCP Server for validating MTSD (i-AUD Design) documents
npm MIT -
Lighthouse for AI agents — test if APIs are properly agent-accessible
MIT -
de-business-validate-mcpgithub.com/marilynceo/de-business-validate-mcpupdated this year
MCP server: de-business-validate-mcp
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A Model Context Protocol (MCP) server for validating quantum computing library code.
MIT -
MCP server for validating tonel formatted st files and smalltalk methods
MIT ★ 2 -
Check IBANs, VAT numbers, phone numbers, emails, LEIs and Peppol IDs, offline or against the official registries
Apache-2.0 -
de-eu-vat-validate-mcpgithub.com/marilynceo/de-eu-vat-validate-mcpupdated this year
MCP server: de-eu-vat-validate-mcp
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Vinkius Edge high-performance Model Context Protocol (MCP) server for robust JSON Schema validation.
★ 3 -
qc-validator-mcpgithub.com/mdfifty50-boop/qc-validator-mcpupdated this year
MCP server for AI agent output quality — hallucination detection, scope compliance, quality scoring
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aria-validate-mcp-servergithub.com/yamanoku/aria-validate-mcp-serverupdated this year
Model context protocol server for validating ARIA (Accessible Rich Internet Applications)
MIT ★ 4 -
MCP server: validate JSON against a JSON Schema (draft-07 / 2019-09 / 2020-12).
MIT -
Model context protocol server for validating ARIA (Accessible Rich Internet Applications)
npm MIT -
qc-validator-mcpgithub.com/mdfifty50-boop/qc-validator-mcpupdated this year
MCP server for runtime quality validation of AI agent outputs — hallucination detection, scope compliance, and output quality scoring
npm MIT -
@agenson-horrowitz/structured-data-validator-mcpgithub.com/agenson-tools/structured-data-validator-mcpupdated this year
MCP server for validating, transforming, and normalizing structured data - built specifically for AI agents
npm MIT -
Market research and competitive intelligence your AI agent runs before it builds. Startup idea validation MCP server + API: a verdict that has to be earned, real competitors, market size, every figure sourced from 60+ live sources.
★ 2 -
Creator Validator MCP server by SoniaIA: find and vet influencers before you hire (TikTok, Instagram, YouTube). Remote endpoint: https://mcp.soniaia.com/mcp
MIT -
gos-claim-validator-mcpgithub.com/csoai-org/gos-claim-validator-mcpupdated this year
Validate NHS General Ophthalmic Services (GOS) claims pre-submission. Catches errors in GOS 1-6 forms before they hit eGOS. For UK opticians + care-home domiciliary providers.
pypi MIT License -
env-validator-mcpgithub.com/pouyasadri/env-validator-mcpupdated this year
An MCP server that inspects your local development environment and reports missing dependencies, version mismatches, and misconfigured environment variables to any MCP-compatible AI assistant.
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MCP server + Apify Actor: validate Telegram t.me links (alive, members, online, group vs channel) with no login or API key. Free 35-chat demo of a 1,000+ Russian B2B chat base for Wildberries/Ozon sellers.
MIT -
MCP server that catches fake backtests before you trust them: deflated Sharpe ratio, backtest overfitting (CSCV/PBO), data-snooping tests (White's Reality Check, Hansen's SPA), lookahead checks and pipeline placebos. 20 tools for Claude, Cursor and any MCP client; on npm, the MCP Registry and hosted at canlicapital.com/mcp.
MIT ★ 1 -
Validates and formats phone numbers, email addresses and postal addresses for any country.
MIT ★ 1 -
looktwice-mcpgithub.com/eason4kim-rocket/looktwice-mcpupdated this year
MCP server for the LookTwice API: email, EU VAT, IBAN, and domain validation plus evidence-backed CPSC recall screening from any MCP client.
MIT -
@apitier/mcp-servergithub.com/apitier/apitier-mcp-serverupdated this year
MCP server for UK KYC onboarding, address verification, business validation, EU/UK VAT compliance, and global identity checks
npm MIT -
Demand Discovery AI — MCP server for startup idea validation and market validation. Real people, quoted in their own words, linked to the source.
NOASSERTION -
t1-t2-protocolgithub.com/Fauxetine/t1-t2-protocolupdated this year
MCP server for heterogeneous AI validation — T1 structured reasoning, T2 cross-model evaluation, and deterministic checksum. Python stdlib-only.
Apache-2.0 -
@neivi/iqx-lookup-mcp-servergithub.com/neivi-it/iqx-lookup-mcp-serverupdated this year
MCP server for IQX Lookup Platform — 12 data validation tools for AI agents: email, phone, EU VAT (VIES), IBAN, BIC, DNS, SSL, IP geolocation, and more. Free tier: 10K req/month.
npm Apache-2.0 -
@emailverifyio/emailverify-mcpupdated this year
Model Context Protocol server for EmailVerify.io. Provides email validation, bulk validation, and email finder capabilities.
npm Apache-2.0 -
no2bounce-mcpupdated this year
MCP Server for the No2Bounce Email Validation API — validate single emails and bulk lists via Claude Desktop, Cursor, Windsurf, VS Code, and any MCP-compatible AI client.
npm MIT -
Offline phone number validation and formatting API + MCP server: E.164, region and line type. No carrier lookup.
MIT -
Carrot auto-writes specs and catches AI code drift. MCP server for Cursor that AST-validates every commit.
MIT ★ 29 -
MCP-based data diagnostics and validation tool designed to detect data quality issues and deliver structured, actionable diagnostic reports.
MIT ★ 1 -
Validate, auto-fix, and package HTML5 ad creatives against IAB-standard sizes and Google display specs, with clickTag / Sizmek / Adform exit detection. CLI, CI/CD, and MCP server for Cursor.
npm SEE LICENSE IN LICENSE.md -
MCP server for the UChecker email validation API — validate addresses, track tasks and export cleaned lists over stdio or streamable HTTP
MIT -
Fast open-source GTFS validator in Rust: web (WASM), CLI, Python, MCP and desktop. Follows MobilityData's canonical validation rules.
Apache-2.0 ★ 14 -
ustidnr-mcpgithub.com/Mavengence/ustidnr-mcpupdated this year
MCP server for EU VAT ID validation (USt-IdNr) via BZSt eVatR REST API — qualified confirmation, batch validation, §6a UStG compliance
MIT -
@a2a-compliance/mcpgithub.com/ultraskye/a2a-complianceupdated this year
Model Context Protocol (MCP) server for the A2A (Agent2Agent) protocol compliance test kit. Lets Claude Desktop, Cursor, Codex, and other MCP clients invoke run_compliance / validate_agent_card / list_checks / explain_check / ssrf_check_url as native tool
npm MIT -
mcp-mailboxvalidatorgithub.com/mailboxvalidator/mcp-mailboxvalidatorupdated this year
MailboxValidator MCP server that checks validity of email address using MailboxValidator API.
npm MIT -
MCP server for providing code feedback, validation, compilation, and linting
npm MIT -
Minimal MCP server for BigQuery SQL validation and dry-run analysis
pypi MIT -
Production MCP Server & Apify Actor for European B2B KYB/KYC verification: official French SIREN/SIRET lookup, EU VIES VAT validation, GDPR cookie/privacy audit, European Accessibility Act (EAA 2025 / WCAG 2.1 AA) check, and llms.txt AI-Readiness scoring.
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Validate Nigerian postcodes in Rust, Python, JavaScript, Java, PostgreSQL, DuckDB, and Polars, with MCP servers for AI agents. Covers Nigeria's NIPOST digital postcode (NDAPS): offline validation, lookup, and reverse geocoding.
npm MIT ★ 7 -
Email validation MCP server using MailboxValidator API
MIT ★ 1 -
AgentRelaygithub.com/mnemox-ai/AgentRelayupdated this year
Verifiable microtask protocol for AI agent collaboration. Task lifecycle, validation engine, reputation system.
Apache-2.0 ★ 67 -
Conventional Commits and Conventional Branch enforcement, validation, and generation
MIT -
Conventional Commits and Conventional Branch enforcement, validation, and generation
pypi MIT -
MCP server for mathematical expression evaluation with strict grammar validation
npm MIT -
@theyahia/dadata-mcpgithub.com/theyahia/dadata-mcpupdated this year
MCP server for DaData — address validation, company lookup, geocoding (Russia)
npm MIT -
promptmcgithub.com/rjonace/promptmcupdated this year
Infrastructure for safely using OpenMC with LLMs: plan, build, validate, run, analyze
pypi MIT -
agentvet-mcpgithub.com/MukundaKatta/agentvet-mcpupdated this year
MCP server: validate tool-call args before execution. Wraps @mukundakatta/agentvet.
MIT ★ 1 -
MCP server: validate EU VAT numbers (VIES), IBANs, EORI + company lookup for Claude/ChatGPT agents
MIT -
JSON-LD / Schema.org structured-data validator API + MCP server. Never fetches URLs.
MIT -
Offline check-digit validation API + MCP server for IBAN, BIC, EU VAT, GTIN/EAN/UPC and ISBN.
MIT -
Phase 1 ethical hacking reconnaissance. 14 modules, AI-validated, self-hosted, MCP-ready.
NOASSERTION