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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3337 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
sol-defi-desk

Paid Solana token safety checks over Streamable HTTP MCP (x402 USDC on Solana + Base).

Finance & CryptoPayments & trading

Responded64 ms12 / 22
io.github.holsson95/mythaitaxes-mcp

Free Thai personal income tax (PIT) calculator for salaried employees, from mythaitaxes.com.

Developer ToolsCode & DevOps

Responded65 ms12 / 22
com.x402supply/hts-classify

Classifies products into HS/HTS customs codes for import/export workflows. $0.10/call via x402.

Finance & CryptoAutomation & workflows

Responded67 ms12 / 22
POKT Agent Korea data (x402 paid)

Korean company due diligence, sanctions screening, Upbit/Bithumb events, HWP. Pay per call (x402).

Developer ToolsCode & DevOps

Responded67 ms12 / 22
nextbank.holiday

Next bank holiday for UK, Ireland, France, Germany and Spain. Free daily quota, then USDC via x402.

Finance & CryptoPayments & trading

Outdated check67 ms12 / 22
orbit x402 Picks

Which x402 endpoint to call: ranked by relevance, payers, recency, price. $0.005/call via x402.

Finance & CryptoPayments & trading

Responded68 ms12 / 22
L50 Data Tools

Every L50 data API in one MCP server: UK companies, tenders, property, eBay, YouTube. x402 USDC.

Finance & CryptoPayments & trading

Responded69 ms12 / 22
SI Dog Park

Information exchange for AI agents. Free product list; guides at 0.01 USDC via x402 on Base.

Finance & CryptoPayments & trading

Responded72 ms12 / 22
AgentReady (Base wallet readiness)

Agent-readiness score for a Base wallet: gas, USDC float, activity. Paid x402 report.

Finance & CryptoPayments & trading

Responded72 ms12 / 22
L50 UK Company Data

UK company lookup (directors, owners, filings), name search, new and overdue companies. x402.

Developer ToolsData access / search

Responded73 ms12 / 22
L50 eBay Market Data

Live eBay prices, sellers and profit for any keyword on 8 eBay sites. Pay per call with x402 USDC.

Finance & CryptoData access / search

Responded73 ms12 / 22
Japan Authority Updates (FSA, BOJ, MOF)

Japan FSA, BOJ and MOF updates for AI agents. Free health tool; paid tools via x402 USDC on Base.

Finance & CryptoPayments & trading

Responded75 ms12 / 22
IGNOREO

Paid tools for AI agents over x402: privacy scan, payment-address check, locks, seller marketplace

Finance & CryptoPayments & trading

Responded75 ms12 / 22
orbit Token Risk

Rug check & honeypot flags for Base/Solana tokens. Free preview; full $0.0009/token via x402.

Finance & CryptoPayments & trading

Responded76 ms12 / 22
Agent Contract Proof

Verify an agent's advertised route, price, payment details, and schemas against its live endpoint.

Finance & CryptoPayments & trading

Responded76 ms12 / 22
Base Approval Risk Check

Find risky ERC-20 approvals on a Base wallet and get revoke calldata. Paid x402 report.

Finance & CryptoPayments & trading

Responded77 ms12 / 22
Email DNS Preflight x402

Paid email, DNS, mail-security and RDAP intelligence for agents over x402.

Developer ToolsCommunication & messaging

Responded78 ms12 / 22
com.x402supply/page-extract

URL to clean article markdown/text + metadata and links. Deterministic. $0.001/call via x402.

Finance & CryptoFile & docs

Responded79 ms12 / 22
com.x402supply/chess-eval

Stockfish chess eval: best move, score, principal variation, multipv. $0.005/call via x402.

Finance & CryptoPayments & trading

Responded79 ms12 / 22
orbit Crypto News

Deduplicated crypto headlines from 37 RSS sources. Free preview; $0.0008/call via x402.

Finance & CryptoPayments & trading

Responded79 ms12 / 22
io.github.hsharmanov02/red-web-utils

17 pay-per-call web, finance, legal and onchain tools for AI agents. USDC on Base via x402/MPP.

Finance & CryptoPayments & trading

Responded80 ms12 / 22
com.x402supply/entity-resolve

Fuzzy entity resolution and dedupe for names, addresses, and company records. $0.02/call via x402.

Finance & CryptoPayments & trading

Responded80 ms12 / 22
RWA Data MCP Server

Pay-per-call crypto data for agents: metrics, claims, custom briefs. USDC via x402.

Finance & CryptoPayments & trading

Outdated check80 ms12 / 22
US Sales Tax Economic Nexus Check

Which US states must a remote seller register in for sales tax? Every state's nexus rule. Sourced.

Developer ToolsCode & DevOps

Responded81 ms12 / 22

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