Free MCP servers · page 226

joshuawowk/signal-mcp

Send Signal messages and read replies through your own signal-cli JSON-RPC daemon (unofficial).

whitestone1121-web/signalbrain

Verifiable receipts for governed process changes; emit, validate, and gate trust

Signato-ai/signato-integrations

Local confidentiality chamber: blocks the wrong AI output before it leaves the machine.

temurkhan13/silentwatch-mcp

MCP server for cron silent-failure detection across crontab, systemd, and OpenClaw schedulers.

silex-tec/silex

Local-first MCP server that reconstructs architecture, workflows and business rules from your code.

Mustafashehab/SIMA

Read-only MCP server for SIMA Solana AI agent protection discovery. No API keys required.

cogswellspacely8-star/simengine

Monte Carlo decision-intelligence over MCP: simulate, optimize, and decide under uncertainty.

lvlrSajjad/simframe

Always-warm iOS Simulator and Android emulator frames: agents read the screen in ~20ms

simple-commenter/mcp-server

Search, export, triage, and manage authorized website and asset feedback in Simple Commenter.

spfunctions/simplefunctions-cli

Calibrated world model for AI agents. 40 tools: world state, markets, trading. Kalshi + Polymarket.

simplepush/simplepush-mcp

Send tasks and notifications to people's phones. Answers build a queryable knowledge base.

vitorantoniazzi/simples-nacional-mcp

Calcula o DAS do Simples Nacional e quantifica a carga que a alíquota não cobre.

willnewby/simpletel-mcp

Query your simpletel OpenTelemetry traces and account usage from a coding agent.

gersonfreire/simpliq

Simpliq Data Proxy MCP Server - Connects LLMs to SQL Databases via Semantic Mapping

com.sgpdirectory/mcp

Singapore business directory. Search companies, UENs, and SSIC industry classifications.

com.sgpdirectory/singapore-business-directory

Singapore business directory. Search companies, UENs, and SSIC industry classifications.

oov1317/singularis-mcp

Unlimited computation for agents. Results depend on your equipment; GPU optional.

cdutr/sisrun-mcp

Read your SisRUN (appsisrun.com.br) training plan: prescribed workouts, pace/HR windows, structure

bounded-systems/site-mcp

Read-only MCP server over robertdelanghe.dev's Sigstore-verified static API (stdio).

thegridwork/siteaudit

Audit websites for accessibility, performance, SEO, design, and mobile. 47 WCAG checks.

pipeworx-io/mcp-sitemap-stats

Sitemap Stats MCP — reads a domain's sitemap(s) and reports their STRUCTURE, not their content.…

io.github.saucer-inc/siteon

Add forms, a CMS and hosting to static and AI-built sites: forms, inquiries, content, deploys.

pipeworx-io/mcp-sk-rpo

RPO — Register právnických osôb, podnikateľov a orgánov verejnej moci (Register of Legal Entities…

skarn-security/skarn-dist

Scans AI coding sessions and assistant configs for leaked secrets and risky hooks; local, redacted

chrischall/skill-mcp

Serves a directory of Agent Skills over MCP: list, load, read files, run declared scripts

useotterkit/skill

Tunnels and webhooks for AI agents: capture, await, verify, replay, and send signed test events.

praeceptor-thesis/skill-builder-landing

Search the skill-builder registry and auto-install skills for Claude Code, Cursor, and Codex.

sudo-ai-git/mcp-skill-sec

Audit agent skills/prompts against 8 supply-chain attack patterns. Deterministic, no-LLM scanner.

CloudCorpRecords/skillcheck

SKILL.md validator: frontmatter, structure, links, and referenced files checked.

ericm1018/skillfm-mcp

AI health, token usage, LLM cost optimization, BYOK vault, and cleanup audits for MCP agents.

ericm1018/skillfm-byok-vault-mcp

BYOK vault, provider API key guidance, usage visibility, and SkillFM Beacon checks for MCP agents.

ericm1018/skillfm-claude-code-token-usage-mcp

Claude Code token usage, cost visibility, and SkillFM Beacon AI health checks for MCP agents.

ericm1018/skillfm-llm-cost-optimizer-mcp

LLM cost optimizer for OpenAI, Anthropic, token usage, BYOK, and SkillFM Beacon audits.

furkan708/skillkit

Toolbox for AI agent skills: scaffold, lint, pack, install, and serve SKILL.md skills

tinh2/skills-hub

Search & install 13,000+ AI agent skills from skills-hub.ai inside any MCP tool.

helloderekg/skim-mcp

Lossless skim-then-expand reading of big files, repos, and command output with far fewer tokens

CSOAI-ORG/skip-hire-ai-mcp

UK Waste Carrier Registration, EA waste codes, hazardous waste consignment notes for skip hire a...

sklarstad/sklarstad-storefront-mcp

Sklarstad products for AI agents: FirstTake, free open-source video production, shoot to master.

KSAklfszf921/skolverket-mcp

MCP server for Skolverket's open APIs - Curriculum, School Units, and Adult Education

darshjoshi/skyglance-mcp

What's flying above you: live aircraft, identity, routes, and your own sighting history.

andypgray/sliderule

A .NET architecture checker that enforces one C# spec and renders the same rules for coding agents.

j4flmao/slim-sheet

Spreadsheet MCP for any agent: reads xlsx/xls/ods/csv, SQL, cleaning, formulas, safe edits

bickov/slimsnap-mcp

Your recent screen captures as structured JSON your AI agent can read. Local only, no network.

slingshot-fyi/brand-kit

Slingshot's brand guides, design tokens and an off-brand colour check, for any MCP client.

founder-ship-it/Slipmark

Record AI agent verdicts bound to file hashes; refuse ones whose files or instructions changed.

qompassai/slipway

Android build/sign/verify/install/release MCP server with measured certification gates.

RudrenduPaul/slop-eval

Wraps the slop-eval CLI as a single generic MCP tool for genericness scoring of AI UI output.

PILOTAAI/slotlock

Calendars for AI agents: free/busy, next free slot, and bookings PostgreSQL never double-books.