MCP HeartbeatTHE MCP OBSERVATORY
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Evidence for your next connection.

Independent measurements of remote MCP servers. Every observation has a timestamp.

Read-only probes

DiscoveryServer directory

Remote MCP servers

Find a server for your workflow, with connection evidence you can inspect.

Connect your agent

3367 servers

Ordered by checks passedClear filters
Dated server measurements. The status describes the last probe or a listed authentication requirement. Checks that have not been measured are not failures. Open a server to inspect the evidence.
Server / capabilityLast probeMedian latencyChecks passedLast checked
United Arab Emirates Payments (Tap Payments — Apple Pay / cards)

United Arab Emirates payments for AI agents — Apple Pay / cards via Tap Payments. Never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
United Kingdom Payments (Stripe — Stripe checkout)

United Kingdom payments for AI agents — Stripe checkout via Stripe. Never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
United States Payments (Stripe — Stripe checkout)

United States payments for AI agents — Stripe checkout via Stripe. Never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Uprampr Marketplace

Buy and sell with Bitcoin, Monero or Pirate Chain. Listings, Want Ads, offers, escrow.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
URL Shortener API

Shorten URLs with hash-based codes or custom aliases. x402 micropayment.

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
Uruguay Payments (Mercado Pago — Mercado Pago wallet)

Uruguay payments for AI agents — Mercado Pago wallet via Mercado Pago. Never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
User Agent Parser API

Parse user agents — browser, OS, device, bot detection. x402 micropayment.

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
UUID Generator API

Generate UUIDs v4, v7, ULID, nanoid. Batch support. x402 micropayment.

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
Vector Search API

In-memory vector search with TF-IDF and cosine similarity. x402 micropayment.

Developer ToolsAI / LLM tooling

Outdated checkNot measured4 / 22
VerifyRef

AI agent recruiting: talent pool match, reference checks, credit packs via Stripe MPP

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Vietnam Payments (MoMo — wallet QR / ATM / cards)

Vietnam payments for AI agents — MoMo wallet QR, ATM, cards. Zero-setup sandbox. Never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Wallet Portfolio Tracker API

Crypto wallet balances, ERC-20 tokens, USD values across Base and Ethereum. x402.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Weather API

Current weather and 7-day forecast for any location. OpenMeteo-powered. x402 micropayment.

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
Web Scraper to Markdown API

Extract clean markdown from any URL. Removes boilerplate. For RAG pipelines. x402.

Developer ToolsBrowser & web scraping

Outdated checkNot measured4 / 22
Web Search API

Web search returning structured results — titles, URLs, snippets. x402 micropayment.

Developer ToolsData access / search

Outdated checkNot measured4 / 22
Webhook Tester API

Test webhook endpoints — send requests, measure latency, validate responses. x402 micropayment.

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
well-001-extract-table

Extract tables from a PDF. x402 $0.01 USDC, Base. As is, no warranty.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
well-002-url-to-markdown

Public https page to markdown. x402 $0.005 USDC, Base. As is, no warranty.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
well-003-json-to-markdown

https JSON URL to tidy markdown. x402 $0.005 USDC, Base. As is, no warranty.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
well-004-html-to-markdown

HTML string or https URL to markdown. x402 $0.005 USDC, Base. As is, no warranty.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
well-005-csv-to-table

https CSV to headers and rows. x402 $0.005 USDC, Base. As is, no warranty.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
well-006-url-metadata

Page title, description and Open Graph tags. x402 $0.005 USDC, Base. As is, no warranty.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
well-007-rss-to-markdown

RSS/Atom feed to markdown items. x402 $0.005 USDC, Base. As is, no warranty.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
well-008-text-stats

https text to counts and sha256. x402 $0.005 USDC, Base. As is, no warranty.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22

Automated measurements. Not a rating. Unmeasured checks are not failures. How to read the evidence