MCP Server Directory

Debian Security Advisories — buy per-query in-session (debianwatch) com.a2awire/data-debian-security-advisory-dsa-linux

Debian Security Advisories (DSA). $0.01/query. Register in-session — free testnet funds.

TheRundown Data MCP io.github.TheRundown/data

Six Product API tools require authentication; protocol metadata discovery is keyless.

FirstSales io.github.firstsalesio/firstsales

OAuth CRM tools for companies, deals, campaign insights and contact creation in FirstSales.

OptionWhales io.optionwhales/options-flow

US options flow & stock data: unusual activity, gamma levels, IV, earnings. OAuth sign-in or keys.

guide-registry guide.babyname/guide-registry

Read-only Bicycle Guide registry: published guides, homes, taxonomy, capability spine. No auth.

genko.me me.genko/cms

Headless CMS. Search the docs and read, draft, publish, and schedule entries via OAuth.

Kaption WhatsApp (Cloud) io.github.Kaption-AI/mcp-extension-remote

Use WhatsApp from AI apps through the Kaption extension. OAuth 2.1 relay that cannot read messages.

Pay-per-call x402 tools on Base: web extract/render, burn-once secret vault, chart, GeoTIFF

QR Branding io.github.quartzondev/qr-branding

Generate branded, scan-validated QR codes (manual, AI, templates, Wi-Fi, vCard, geo).

Authorizes MCP tool calls against a session policy, not one call at a time.

Barcode Tools (decode, render, GTIN validate) io.github.appvantagelabs2-a11y/barcode

Decode, render, validate barcodes: QR, DataMatrix, EAN, UPC, PDF417. All tools free, no auth.

RatedWithAI accessibility checker com.ratedwithai/accessibility-checker

Scan a live web page for WCAG 2.1/2.2 AA issues with axe-core: score, grade, failing rules.

crosscheck com.crosscheckapi/crosscheck

Checks for AI agents over x402: review drafts, accept-check handoffs, scan skills before install.

PlateQuery MCP — US License Plate & Vehicle Information com.platequery/plate-api

License plate lookup for AI agents: plate messages and ALPR history via PlateQuery. OAuth 2.1.

guide-registry guide.selfhelp/guide-registry

Read-only Bicycle Guide registry: published guides, homes, taxonomy, capability spine. No auth.

InvoiceParser Pro com.invoiceparserpro/ipp

Invoice PDFs, scans and photos to Excel, with the math checked: fields, line items and totals.

Shipvela com.shipvela/shipvela

Create website projects, deploy GitHub sites and read logs/usage via remote OAuth MCP.

Stemma kitchen.stemma/stemma

Recipes, meal plan, shopping list and pantry from the Stemma iOS app, with per-area OAuth scopes.

Authentication-Info nextnonce shape, value discarded io.github.sadri-dridi/auth-info

Authentication-Info nextnonce shape, value discarded

Secure MCP server framework with 23 security layers and ML threat detection. Zero deps.

Query OSV.dev for known vulnerabilities by package and version, and scan lockfiles in batch.

FindWeedNY com.findweedny/findweedny

Licensed NY cannabis dispensaries, brands, deals, license checks and lab-anchored reviews. No auth.

CERT-FR Security Advisories — buy per-query in-session (certfrwatch) com.a2awire/data-cert-fr-advisory-national-cert-alert

CERT-FR (ANSSI) security advisories & alerts: French national CERT vulnerability feed, hourly

Connect AI assistants to the Rubrik Security Cloud GraphQL API to discover, query, and automate.