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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3326 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
Quant Agent Shop

Search, filings, sanctions, company, domain, email, SEO and weather tools, paid per call over x402.

Data & AnalyticsCommunication & messaging

Responded584 ms14 / 22
Imperium Pre-Flight Readiness Auditor — A2A, MCP & x402 Validator

Audit any domain or agent for A2A, MCP, x402, MPP, ERC-8004, and Poppy readiness.

TravelPayments & trading

Outdated check585 ms14 / 22
Income Factory Toll Fabric

Eight metered machine-intelligence tools for AI agents with native x402 payment paths.

Finance & CryptoPayments & trading

Outdated check586 ms14 / 22
mcp-x402 — MCP server for agents with autonomous USDC/RLUSD payments

85+ pay-per-call MCP tools: trading, federal grants/contracts, SEC, FTD. x402 USDC/RLUSD. No keys.

Finance & CryptoPayments & trading

Outdated check592 ms14 / 22
AgentData - Executable Liquidity / Exit-Cost

Size-aware exit cost, depeg risk & liquidity fragility for a Base token (x402, testnet).

Developer ToolsCode & DevOps

Outdated check594 ms14 / 22
groTAX by Grovisor

UAE Corporate Tax: CT computation, SBR, penalties, free zone test, TP and health-check.

Finance & CryptoPayments & trading

Responded596 ms14 / 22
X402 Git

Buy private git repos and agent skills with USDC over x402. Read the manifest free, then pay.

Finance & CryptoPayments & trading

Responded598 ms14 / 22
io.github.m9labs-railscope/verantis-mcp

Verified directory for machine payments (x402 & MPP): check services and wallets before agents pay.

Finance & CryptoPayments & trading

Outdated check602 ms14 / 22
io.github.bevanding/signaldaemon

Narrative & signal intelligence for AI agents: crypto/AI/macro convergence & divergence.

Finance & CryptoCode & DevOps

Responded603 ms14 / 22
com.mart402/docs

Documents and web for AI agents: PDF parse, OCR, web extract, invoice checks. x402, no API key.

Finance & CryptoPayments & trading

Responded604 ms14 / 22
A.U.G.U.R Foresight

Solana + pump.fun intel for agents: launch verdicts, token risk, dev/wallet records, smart money.

Finance & CryptoPayments & trading

Responded608 ms14 / 22
Inbox eSIM

Travel eSIMs for 200+ countries: compare 100+ eSIM brands' prices and buy a plan (MPP, Stripe).

Finance & CryptoPayments & trading

Responded609 ms14 / 22
X402-Broker Global B2A & A2A Tool Marketplace

Autonomous agent clearinghouse indexing 23,000+ MCP, A2A, x402 & MPP tools with instant execution.

Finance & CryptoPayments & trading

Responded610 ms14 / 22
SCRIPTMASTERLABS — GhostKey MCP

Remote MCP for compliant pay-per-use agent capabilities with x402 execution.

Finance & CryptoPayments & trading

Outdated check610 ms14 / 22
RWA Leads

Scored RWA, tokenization and family-office intent signals with source URLs. x402 pay-per-call.

Marketing & SalesPayments & trading

Responded615 ms14 / 22
AgentDiet 4-Protocol MCP Glama 5.0/5.0 TDQS, A2A Card & x402/MPP Schema Compiler

Audits any live MCP server URL or GitHub repo on Glama's 6-dimension TDQS rubric and compiles dro.

Developer ToolsCode & DevOps

Outdated check616 ms14 / 22
Pass-through tax rules

Cited, tax-year-dated rules for state PTET, the federal SALT cap, and bonus-depreciation conformity.

GovernmentData access / search

Responded617 ms14 / 22
FactStamp

Verify a company, figure or citation before you rely on it. Card or crypto; signed receipt.

Finance & CryptoKnowledge & memory

Outdated check617 ms14 / 22
Goldsky

Goldsky docs: Edge RPC on 150+ chains, Feeds APIs, Subgraphs, Turbo, x402 pay-per-request.

Finance & CryptoPayments & trading

Outdated check618 ms14 / 22
Penny Rounding

Round cash totals to the nearest nickel correctly — after tax, on the total, cash only.

Finance & CryptoPayments & trading

Outdated check619 ms14 / 22
xytara MCP Executor

Pay-per-call MCP tools and signed on-chain attestations: 20 free/day, then x402 or a spend key.

Finance & CryptoPayments & trading

Responded620 ms14 / 22
RQM WaveEngine Jobs

Delegate 20 typed, evidence-backed WaveEngine signal work products with fixed-request x402.

Finance & CryptoPayments & trading

Outdated check622 ms14 / 22
Gexno Web3

Free Ethereum wallet profile & NFT metadata MCP tools (no signup).

Finance & CryptoPayments & trading

Outdated check623 ms14 / 22
Wizeb AI-Native Index

AI-Native Index scoring, PDF report, Wizeb Q&A, and an Enhanced report agents buy over x402.

Finance & CryptoPayments & trading

Outdated check629 ms14 / 22

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