ScrapeField
scrapefield/scrapefield
Google Maps, LinkedIn, Instagram, TikTok and X data as tools. Demo mode needs no key.
ScreenSeal
wthall05/screenseal-mcp
Sanctions screening for AI agents: check a name against OFAC and EU lists. Free during launch.
ScriptHaul
com.scripthaul/transcripts
Free YouTube transcripts, no API key: videos, channel lists, latest uploads, bulk download links.
Scrub
com.malgorath.scrub-mcp/scrub-mcp
Stateless PII redaction over MCP/REST. Free ≤1000 words or $0.01/call; file upload supported.
SDK
marginpad/sdk
Free crypto-futures paper trading and live market data for AI agents. 29 tools; no key for data.
SDSentry
com.0xpi.sdsentry/sds-lookup
Free SDS lookup for a product or inventory list, GHS label-maker links, pictograms, HazCom dates.
Seal
ai.aqta/seal
Verify Seal AI decision receipts: signed evidence anyone can check, no account needed.
SealsCrafter 印章
io.github.delicious28/sealmaker-mcp
Carve Western names into Chinese name seals (seal-script PNG) with real meanings. Free, no API key.
Seamgrin
Seamgrin/dubdubdub
Find alterations, free tailor training, and paid work opportunities for experienced tailors.
sebbi.pro
pro.sebbi/governance
Prove AI decisions in Bitcoin: 755 compliance checks, bank fraud proof, AI payment checks. Free.
Security Tools
com.rangercheck/security-tools
Free front-end security check for any website: a grade plus the secrets and keys it exposes.
Selah: Brand Deal Rates
fyi.selah/rates
Free creator rate benchmarks and brand-offer checks, with sources. No login, no API key.
Seldons Korea Trade
ai.seldons/korea-business-trade
Korean tax-office and fair-trade registries, HS codes, landed cost. Two tools need no API key.
Seller Profit Doctor
FelixNovaNexus/sellerprofitdoctor-mcp
Free profit check-up for Etsy, Shopify and Amazon sellers: fees, sales, ads, shipping, plans, rates.
Semantic Geometry
marcoret74/sg
Deterministic verifier: LLM proposes, graph verifies. Sub-ms, offline, 0 tokens.
SendPay free business calculators
com.sendpaybusiness.app/free-business-tools
Free VAT, card fee, loan, mortgage, margin, ROI and break-even calculators plus IBAN/SWIFT checks
SEO Audit
glivera/seo-audit-mcp-server
Professional SEO auditing: 15 tools, 9 checks, CWV, E-E-A-T, schema, GEO. Free tier.
SeoAiX SEO Audit
riverliu8/seoaix-mcp
Free SEO & AI-search (AEO) audits for any site or Shopify store, with emailed weekly score reports.
Sereno
com.asksereno/sereno
A cron job monitor your AI agent sets up and can ask why a job failed. Free for up to 200 checks.
ServeCounter booking
com.servecounter/booking
Find businesses that use ServeCounter, see their services, prices and free times, and book.
ServeReel
com.servereel/servereel-mcp
Free 7 day content plans built from a business website. ServeReel creates reels, videos, and images.
ServerScan
com.serverscan/mcp
PCI ASV scan prices, SAQ check, free payment page check, PCI guides and scan-failure fixes.
SettleIt
now.settleit/settleit
Group decisions in one link: polls, who's-in check-ins, find-a-time, and rankings. No sign-up.
shadcn.exchange
exchange.shadcn/blocks
Search 12,000+ shadcn/ui blocks from 130+ registries, free and paid, with install commands.
Shared Persistence
com.sharedpersistence/shared-persistence
Persistent shared message space for autonomous agents: read, write, reply, search. Free, no signup.
ShareNotes
dev.sharenotes/notes
Create and read text notes at memorable links like sharenotes.dev/blue-fox-42. No key, no account.
Sharpnel Trading
com.sharpnel-trading/dealer-gamma-levels
Free dealer-gamma call walls, put walls and gamma flip for ES, NQ, SPX and QQQ, graded daily.
Shiftmoor
dev.workers.cybermax-tools.cybermax/shiftmoor
Website change monitor MCP: see what changed on any public page. Free 3 pages; $4.99/mo.
shinnslist
com.shinnslist/shinnslist
Public-record parcel signals for off-market real estate. Free beta; only proven signals listed.
ShipLatch
com.shiplatch/scanner
Free passive security scan for AI-built apps: leaked API keys, public .env files, security headers
Shipping Rates & Postage Calculator
com.onlineshippingcalculator/shipping-rates
Live USPS, UPS & FedEx shipping rates plus USPS postage and stamp prices. Free, no API key.
SHPBL
com.shpbl/repository-audit-and-repair
Audit and repair any public GitHub repo. Free survey; paid source, unified diffs and a pull request.
Sibfly API
james-sib/sibfly-api
Measured ground motion per US address (NASA InSAR). Self-register, $0.40/report, misses free.
Sighttrue
kaitzyy-dev/sighttrue
Measured readings on open-source dependencies: health, end-of-life, model prices, incidents.
Sigma Prep Math Worksheets
io.sigmaprep/worksheets
Find free math worksheets (Pre-Algebra–Calculus, Statistics) as printable PDFs with answer keys.
Signal Lab
io.github.QDThead/signal-lab
Search and export free market, macro, weather, news and OSINT data sources, with terms and skills.
SignSimple
app.signsimple/signsimple
Send PDFs for legally binding e-signature, free and unlimited. Track status; free legal templates.
Signvoy
pushkar0108/pdf-sign
Send documents for e-signature, track signing status, and download signed PDFs. No API key required.
Silent Directive Tools
silentdirectivellc-hub/silentdirective-mcp
Free tools: 2026 API shutdown scanner, small-business website auditor, photo resale estimator.
Simple Lab Tools Label Maker
rgejman/simplelabtools
Create printable cryogenic lab, sample, tube and QR label sheets. Six templates; free, no login.
SimpleNPI
com.simplenpi/npi
Free NPI lookup and verification (CMS registry) and free NPI applications filed for you.
Simpler.Asia
asia.simpler/simpler-asia
Free back office for small businesses in Singapore and Southeast Asia: invoices, expenses, stock.
SimplyScan
io.simplyscan/simplyscan
Security, SEO and AI-visibility scanner for web apps · free scans and focused checks via MCP.
Singapore Entities Directory
com.sgpbusiness/singapore-entities-directory
Free, read-only lookup of Singapore registered entities by name or UEN, from ACRA/UEN open data.
SingChat
org.singchat/singchat
Free live chat and AI support agent. Auto-create a workspace and embed from your AI editor.
Sinkto.Link
link.sinkto/sinkto
Free URL shortener: manage short links, QR codes and click analytics from AI clients.
Siporpro
com.siporpro/directory
Find verified doctors, dentists, lawyers and accountants; see free times; request a booking.
Sirfus
com.sirfus/sirfus
Find one verified local pro for anyone: plumbers, roofers, cleaners, 110+ services. Free.