MCP Server Directory

preflight402 io.ironshell/preflight402

Trust verdict for an x402 payment endpoint: health, 402 handshake, price, proceed/caution/avoid.

constitution-lint dev.agentopskit/constitution-lint

Static linter for CLAUDE.md-style agent constitution files: 10 operational-guardrail checks.

A fast, configurable filesystem server for the Model Context Protocol (MCP), written in Rust.

TAP tech.human/tap

Credential isolation for AI agents: placeholder secrets, policy checks, optional human approval.

Manage Kaiten spaces, boards, cards, comments, and tags with compact MCP responses.

Checkout.com io.github.checkout/mcp

Search Checkout.com docs and API reference, plus manage payments, refunds, and payment links.

Send push notifications, build audiences, and view campaign analytics from PushEngage.

Nalegalu MCP io.github.nalegaluorg/nalegalu

Semantic search over Polish law and case law, citing the exact in-force article.

Run AI-generated code safely. gVisor-isolated Python/JS sandboxes for any MCP client. Pay per run.

namailu.cz Agent Email cz.namailu/agent-email

namailu.cz gives your AI agent its own email inbox: read and send mail over MCP, with OAuth.

x402 service-quality oracle: check a service's paid-probe quality tier and score before paying it.

Power Expert India Regulatory Tariff MCP com.powerexpertindia/tariff-mcp

Indian electricity tariff and bill-verification MCP with fail-closed regulatory execution.

MCP server: seal & sign ISO 20022 readiness evidence into tamper-evident audit packs.

EVERJUST app.everjust/mcp

Operate your EVERJUST workspace: CRM, sales, projects, mail, documents, calendar, invoicing.

google-events io.github.johnisanerd/google-events

Google Events listings with dates, venues, and ticket links via a hosted MCP server.

Klyf ai.klyf/klyf

AI YouTube analyst in Claude for creators: audit, fix, decide what to make next, grow subs.

Google News data for agents sh.fetcher.google-news/mcp

12 Google News endpoints. Pay per call in USDC via x402.

Dados B3 io.github.Val7h/dados-b3

Brazilian stock (B3) fundamentals: ratios, dividends, scores, REITs (FIIs), ETFs. Open methodology.

APICK app.apick/all

APICK Korean data, simple-auth lookups, OCR, search, conversion, image, video and TTS

EngScript Engineering MCP com.engscript/mcp

Engineering calculation MCP server for oil and gas engineering applications.

ohio-business-registrations io.github.seanthings/ohio-business-registrations

New Ohio business registrations: name, filing date, entity type, registered agent, address.

arclera net.arclera/arclera

Read-only company facts for ARCLERA DIGITAL, LLC: contact, services, legal identity.

GridShot — AI Fashion Photography com.grid-shot/gridshot

Virtual try-on and on-model AI fashion photography: catalog search, try-on grids, HD delivery.

Layven io.layven/layven

Shared drive for your agents and teammates.