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

3298 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
Car Loan Interest Deduction Calculator

2025-2028 car loan interest deduction, SALT cap, child tax credit and 2026 tax brackets (IRS).

Developer ToolsCode & DevOps

Responded244 ms15 / 22
pumpdata

Check a pump.fun coin, dev or wallet: deployer record, bundle, PnL. Every pump.fun trade, ever.

Finance & CryptoPayments & trading

Outdated check244 ms15 / 22
Kairos Research

Base wallet activity and contract checks, web/PDF to Markdown, by an AI agent (x402).

Finance & CryptoPayments & trading

Outdated check255 ms15 / 22
nohumans.directory

We buy from x402 endpoints with real USDC and publish delivery outcomes. Check before you spend.

Finance & CryptoPayments & trading

Outdated check259 ms15 / 22
No Tax on Overtime

No tax on overtime, tips and senior deductions for 2025-2028 (OBBBA), with IRS caps and phase-outs.

Developer ToolsCode & DevOps

Responded263 ms15 / 22
Gale Finance

Risk and return metrics for stocks, ETFs, crypto and commodities, with citable Gale Finance sources.

Finance & CryptoPayments & trading

Outdated check272 ms15 / 22
Arzbin MCP Server

Live Iran exchange rates, gold, crypto, and Toman market data for AI agents.

Finance & CryptoData access / search

Outdated check275 ms15 / 22
Estate and Gift Tax Exemption Calculator

2026 US estate and gift tax: $15M exemption (P.L. 119-21), 40% rates, annual exclusion, DSUE.

Developer ToolsCode & DevOps

Responded276 ms15 / 22
ACA Premium Tax Credit Calculator

2026 ACA premium tax credit: expired enhanced subsidy, 400% FPL cliff, FPL, APTC repayment rules.

Developer ToolsCode & DevOps

Responded278 ms15 / 22
Bitview

Read-only Bitcoin blockchain, mempool, mining, market, and on-chain analytics; no API key.

Finance & CryptoPayments & trading

Outdated check278 ms15 / 22
UK Income Tax and Salary

UK income tax and take-home pay 2025/26 and 2026/27: Scottish bands, NI, student loans, 60% trap.

EducationCode & DevOps

Responded280 ms15 / 22
Duo Data Utilities: IBAN, VAT, ISIN Validation API

IBAN, ISIN, VAT/tax ID, GTIN validation; timezone, geo, text, chain utilities. Pay per call

Finance & CryptoPayments & trading

Outdated check289 ms15 / 22
NebenkostenPro

German utility costs (Nebenkosten): city data, property tax, housing benefit, deadlines, bill check

Real Estate & PropertyData access / search

Outdated check310 ms15 / 22
TraderSpy

AI crypto signals, whale positions, 19 technical indicators, derivatives, screener and backtests

Finance & CryptoPayments & trading

Outdated check330 ms15 / 22
Autoza UK

UK used cars: road tax (VED), ULEZ charges, MOT dates, DVSA reliability, live dealer stock.

Finance & CryptoCode & DevOps

Responded332 ms15 / 22
AgentStack (agentstack.tech)

Backend for AI agents: one batched tool over ~668 actions (hosting, storage, auth, payments).

Finance & CryptoPayments & trading

Outdated check337 ms15 / 22
Crypto Regime MCP

Crypto trend and regime MCP tools with automatic x402 payments or prepaid credits.

Finance & CryptoPayments & trading

Responded341 ms15 / 22
Crypto Pulse

x402 Solana crypto pulse for agents + free BTC/ETH/SOL prediction arena

Finance & CryptoPayments & trading

Outdated check353 ms15 / 22
ORA · ORUM

Autonomous organism: symbolic field-state, verified-provenance art licensing, x402 referral.

Developer ToolsCode & DevOps

Outdated check356 ms15 / 22
AgentFeed

Crypto briefs and data, Solana pre-trade checks, sanctions, papers, NLP. 102 tools, USDC, 20 chains.

Finance & CryptoPayments & trading

Responded357 ms15 / 22
Page Change

Free compare_page_observations for two held JSON pages. No fetch, wallet, or payment.

Finance & CryptoPayments & trading

Outdated check368 ms15 / 22
AI Storefront Readiness Grader

Grades any storefront URL A-F on 20 weighted conversion checks. $1.00/call via x402.

E-commerceCode & DevOps

Responded374 ms15 / 22
Banking Assistant (Metabind demo)

Demo personal-finance MCP App: spending, subscriptions, and net worth as interactive UI.

Finance & CryptoPayments & trading

Outdated check377 ms15 / 22
Privi Verify

Manufacturing lot verification and chain of custody for AI agents, paid per call in USDC (x402).

Finance & CryptoPayments & trading

Outdated check380 ms15 / 22

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