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.

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4754 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
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Outdated checkNot measured4 / 22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Outdated checkNot measured4 / 22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Outdated checkNot measured4 / 22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Outdated checkNot measured4 / 22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Outdated checkNot measured4 / 22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Outdated checkNot measured4 / 22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Outdated checkNot measured4 / 22
well-009-url-change-watch

Has this https URL changed? (sha256/etag). x402 $0.01 USDC, Base. As is, no warranty.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
well-010-docx-to-text

Word .docx to text and tables. x402 $0.005 USDC, Base. As is, no warranty.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
well-011-sharescan

Pre-share scan of text for your terms and secrets/PII. x402 $0.005 USDC, Base. As is, no warranty.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
well-012-x402-probe

Unpaid x402 probe: status, latency, payment terms. x402 $0.005 USDC, Base. As is, no warranty.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
well-015-municipal-notices

Public municipal notices with source links. x402 $0.005 USDC, Base. As is, no warranty.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
well-016-datacleanup

CSV cleanup: dates, emails, phones, dedupe. x402 $0.005 USDC, Base. As is, no warranty.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Whale Alert API

Track large on-chain whale transactions on Ethereum and Base. x402 micropayment.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Wisely x402 Agent-Payment Infrastructure

Self-facilitated x402/MCP payments for hosted endpoints, rail proofs, receipts, and agents.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Wodan Posture

Access-posture reports for agent data sourcing: robots, bot wall, licensing. Paid per call via x402.

Finance & CryptoPayments & trading

UnreachableNot measured4 / 22
x402 Agent Tools

Pay-per-call web reader (Markdown/RAG chunks) and agent utilities; x402 USDC on Base.

Finance & CryptoPayments & trading

UnreachableNot measured4 / 22
x402 Text Tools Catalog

Pay-per-call NLP & embeddings APIs on Base via x402. No keys/signup; agents pay per call in USDC.

Finance & CryptoAI / LLM tooling

Outdated checkNot measured4 / 22
x402 Text Tools Catalog

Pay-per-call NLP & embeddings APIs on Base via x402. No keys/signup; agents pay per call in USDC.

Finance & CryptoAI / LLM tooling

Outdated checkNot measured4 / 22
Zambia Payments (Flutterwave — mobile money)

Zambia payments for AI agents — mobile money via Flutterwave. Never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
agency.lona/trading

AI-powered trading strategy development: backtesting, market data, and portfolio analysis

Finance & CryptoData access / search

Requires authOutdated checkNot measured4 / 22
ai.plero/plero

Operating system for creative companies: clients, projects, estimates, contracts, invoices, talent

Finance & CryptoPayments & trading

Requires authOutdated checkNot measured4 / 22
ai.smithery/alphago2580-naramarketmcp

Access Korea’s G2B procurement and Nara Market data for bid notices, awards, contracts, statistics…

Finance & CryptoData access / search

Requires authNot measured4 / 22Not checked yet
ai.smithery/anirbanbasu-frankfurtermcp

A MCP server for the Frankfurter API for currency exchange rates.

Finance & CryptoPayments & trading

Requires authNot measured4 / 22Not checked yet

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