Which remote MCP servers actually answer

Pay-per-call China macro and supply monitors: revisions, FDI, LEI changes, 1688 suppliers.

Look up Chinese phone number carrier, province, and city from official MIIT allocation data.

China A-shares MCP. Keyless.

China export tax rebate rate & HS code lookup (官方退税率).

Search ChooseHelp's US addiction & mental-health treatment facility directory. No referral fees.

Strom- und Gastarife sowie Produktinformationen für Energievergleiche, live per MCP-Tool.

Calendar API for AI agents — events, availability, scheduling, webhooks, and iCal feeds.

Chuck Norris MCP — wraps chucknorris.io (free, no auth)

Buyer-side SaaS due diligence: upload subscription CSV, detect hidden churn risk

Wholesale BOM pricer: send a parts list, get a priced line-by-line quote by email in minutes.

8 CIPHER tools — Solana scan, breach check, Jito, FRED, Drift, repo health, more. x402-paid on Base.

Production-grade cryptography toolkit with 31 MCP tools for classical, PQC, and KMS workflows.

CISA Known Exploited Vulnerabilities catalog

Citation check for AI output — deterministic, line-exact mechanical claim verification.

Does a cited URL exist, and does the source name what your claim names? Two answers.

Verifies legal citations vs primary sources: existence, quote match, proposition support.

Cloudflare Workers MCP server: citation-verifier

Verify citations in AI text: fetches each cited source, returns verdicts with evidence quotes.

Search papers, format citations in 60 styles, and verify bibliographies against scholarly sources.

Full AI visibility audits: schema, citations, agentic readiness, agent journeys, WordPress deploys.

Citation-health over a CC0 citation graph: what supports, refutes, or cites a paper. Read-only.

Live Estonia real estate listings with search, geo filters, and property metadata.

Live Latvia real estate listings with search, geo filters, and property metadata.

Cost-of-living & quality-of-life comparison: take-home pay, equivalent salary, safety-net deltas.

Citybikes MCP — wraps CityBik.es API (free, no auth required)

Parametric estimating engine: CESMM4/NRM2/SMM7/MMHW Bills of Quantities for civils assemblies.

U.S. civic data for AI agents: reps, votes, bills, finance, lobbying, cited gov sources. 47 tools.

Governed agent city-state. Register, fill mission slots, earn under constitutional protocol.

Civitai MCP.

Biomedical failure intelligence platform for terminated trials and translational analysis.

Find products and standards that may infringe a patent - verified, evidence-backed targets.

Findet zertifizierte Kfz-Sachverständige im Umkreis einer deutschen PLZ — anonym, read-only.

AI business intelligence: sign up, ingest data, run analyses, generate reports from any MCP client.

Condition-aware ingredient & product safety for AI agents: verdict, evidence tier, citations.

Clash Royale player, clan, war, tournament, rankings, cards. Supercell dev key.

Validate ClaudeBot and Claude-SearchBot IP addresses. Remote MCP validate_ip tool.

Search and install Claude Code plugins from the ClaudeRegistry marketplace (read-only).

Persistent project context for Claude. IANA-registered .faf format.

Cloudflare Workers MCP server: claude-skill-validator

Search the Claudeers registry of Claude tools, ranked by maintenance and community signals.

Book a San Francisco apartment cleaning. $40/hr, weekends 8am-6pm PT, SF only.

MCP Gateway: wrap any MCP server with cold-start retries, uptime SLA, and per-execution MPP billing.

Agent-first task marketplace MCP — discover, claim, and deliver paid workspace tasks.

Zero-auth image optimize/convert + cited storage, image-format & QR data for AI builders.

Architecture docs and patterns for NestJS + Nuxt full-stack apps

Connect your Clear account to AI via Brazil's Open Finance: balances, statements, cards, investments

Reference data for prediction markets: graded resolution clarity, cross-venue links, provenance.

Access Clerk authentication docs, SDK snippets, and quickstart guides

Cleveland Museum of Art Open Access API (~63k artworks, many CC0)

Read teams, spaces, lists and tasks; create, update and comment on tasks and track time.

ClickUp MCP — wraps the ClickUp REST API v2 (BYO API key)

Behavioral intelligence for client-facing professionals. Know who you're walking into.

Climate MCP — wraps Open-Meteo Climate API (free, no auth)

Climate & Energy Feeds MCP.

Climatiq MCP — carbon footprint calculator with emission factors

Clinical trial search and status from ClinicalTrials.gov

NIH Clinical Tables: ICD-10/9, RxTerms, LOINC, NPI, conditions search. Keyless.

ClinicalTrials MCP — wraps ClinicalTrials.gov API v2 (free, no auth)

MCP server for ClinicalTrials.gov v2 API. Search, retrieve, compare, and analyze trials.

Hosted MCP server for Cliniko — patients, appointments, availability, and invoices for AI agents.

MCP server for Clipkit — gives AI agents a video toolbox via the Clipkit schema.

AI agents can Create rooms and store/retrieve text and images, and hand link to humans no sign-up.

Walk, bike, and transit travel times from every US census block to nearby amenities.

Close CRM MCP Pack — wraps the Close (close.com) API v1.

Search Closelook's AI-market explainers and daily readings of its functional AI indices. Read-only.

The agent-native cloud: database, functions, AI, storage, auth and more. 40+ tools, one API key.

Cloudflare Radar MCP — internet observatory (traffic, attacks, BGP, quality)

CloudOracle - 14-tool multi-cloud compliance MCP: AWS, Azure, GCP posture, IAM, configs.

Trusted B2B service providers with verified client reviews

CMS Open Data MCP — US Centers for Medicare & Medicaid Services.

Medicare spending, chronic conditions, hospital quality, readmissions, and enrollment

CMS Open Payments, with annual dataset discovery through the official DKAN API.

Czech National Bank daily FX rates: CZK exchange rates, currency conversion, history

Czech National Bank (Česká národní banka, ČNB) public API MCP. Keyless.

Issues the federal tax clearance certificate (CND) for a person or company from the CPF or CNPJ. Pla

Issues the federal debt and active-debt clearance certificate for a rural property from the CIB. Pla

Issues the municipal tax clearance certificate for a person or company from the CPF or CNPJ, municip

Issues the labor debt clearance certificate (CNDT) from the TST for a person or company from the CPF

Checks whether a person or company is in the National Register of Punished Companies (CNEP) from the

Checks convictions for administrative misconduct and ineligibility (CNIA) of a person or company fro

Free Brazilian CNPJ lookup (legal name, status, partners) + lawsuit discovery. Public data, no login

CNPJ Brazil MCP — Brazilian company-registry (Receita Federal) lookup via

Barbell strength training tools for AI assistants. Warmup, plate loading, and LP.

Payment rails for AI agents. Pay merchants in USDC on Base. Dual-protocol: x402 + OKX APP.

Validate Cốc Cốc Bot IP addresses. Remote MCP validate_ip tool.

Systematic medical reviews and evidence-based healthcare research

Search 500 cocktail recipes, get full recipes, find drinks by ingredient, suggest random picks.

Cocktails MCP — TheCocktailDB API (free, no auth)

MCP server for Codat — companies, connections, invoices, bills and financial statements.

Execute Python, JavaScript, SQL code in a sandbox. x402 micropayment.

Cloudflare Workers MCP server: code-explainer

Cloudflare Workers MCP server: code-pattern-risk-scanner

Finds real, maintained open-source repos that fit your project. MCP grounding for coding agents.

Codeforces competitive programming users, contests, problems

AI agent draws editable hand-drawn diagrams (flowchart, ER, architecture) via MCP, not static images

Enterprise code intelligence for M&A, security audits, and tech debt. Hosted server with 200k free.

Code::Stats public coding-XP profiles (codestats.net)

Search CodeStringers' Zoho & custom-software content and business details, live.

Codewars user profiles, completed kata, authored kata, kata detail. Keyless.

Search, preview, and install community Codex pet packs.