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

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
BotsRated (beta)

Signed checks of x402 sellers on Base and remote MCP servers, before your agent pays.

Finance & CryptoPayments & trading

Outdated check540 ms14 / 22
Terminal Tax

Tax software: your AI agent sends the facts, we calculate and e-file; you review and sign.

Developer ToolsCode & DevOps

Responded543 ms14 / 22
Imperium Workflow Studio — Multi-Agent DAG & Pipeline Executor

Execute multi-step A2A & MCP agent workflows with atomic x402/MPP settlement.

Finance & CryptoAutomation & workflows

Outdated check545 ms14 / 22
Imperium Live Multi-Specialist A2A Swarm Mesh Coordinator

Coordinate multi-specialist A2A agent swarms with cryptographic handshakes and x402 settlement.

Finance & CryptoPayments & trading

Outdated check547 ms14 / 22
io.github.onrampbtc/proof-of-custody

Bitcoin custody scores, failure registry, ETF custody, stablecoin and x402 data, source router.

Finance & CryptoPayments & trading

Responded554 ms14 / 22
Distill

Pre-computed answers with sources and confidence, paid per call over x402 (USDC on Base).

Finance & CryptoPayments & trading

Responded555 ms14 / 22
URL to Markdown API — ScriptMasterLabs

$0.001/read URL-to-Markdown via x402 on Base. Settle-proven end-to-end 2026-11-02 (SELF-PROOF).

Finance & CryptoFile & docs

Responded555 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

Responded556 ms14 / 22
OPX

Buyer-side machine commerce: choose where to spend using recent paid x402 provider evidence.

Finance & CryptoPayments & trading

Responded558 ms14 / 22
XRPL-Utilities

XRPL data tools for AI agents: wallet classifier, signals, RWA tracker, ETF flows. Pay via x402.

Finance & CryptoPayments & trading

Responded561 ms14 / 22
RQM Studio Jobs

Delegate 20 fail-closed RQM Studio quantum work products with fixed-request x402.

Finance & CryptoPayments & trading

Outdated check561 ms14 / 22
TeamPredict HR Calculators

HR, payroll and date calculators: turnover, eNPS, US take-home pay, bonus tax, overtime. No key.

Finance & CryptoPayments & trading

Responded564 ms14 / 22
SavePropTax

Free check of a California home for a Proposition 8 property tax reduction, plus owner filing.

Finance & CryptoPayments & trading

Outdated check565 ms14 / 22
Geo-Parity

Cost of living, fair global pay, healthcare costs, nomad visas and tax residency. Free, no key.

HealthcareData access / search

Responded566 ms14 / 22
Neuron Sports Ad Exchange

Autonomous AI sports ad exchange with quote-bound Stripe settlement and live delivery telemetry.

Finance & CryptoPayments & trading

Responded567 ms14 / 22
Signo

AI agents that watch DeFi positions: read a wallet report, draft agents for the owner to sign.

Finance & CryptoPayments & trading

Outdated check567 ms14 / 22
SignalHarness.ai

330 production AI-agent services for data, validation, AI, crypto, and x402 pay-per-use.

Finance & CryptoPayments & trading

Responded568 ms14 / 22
Leal

Design and launch Apple Wallet and Google Wallet loyalty stamp cards for your shop, café or salon.

Finance & CryptoPayments & trading

Responded569 ms14 / 22
Paddock

Pre-payment verification for AI agents.

Finance & CryptoPayments & trading

Outdated check574 ms14 / 22
PlainText Wallet Approval Checker

Explains wallet approvals and signature requests in plain language: SAFE, CAUTION or RISK.

Finance & CryptoPayments & trading

Outdated check577 ms14 / 22
SCRIPTMASTERLABS — Triple-Trigger

Triple-Trigger MCP: SPEC v2 triple-trigger ticker scans on live Schwab data. $0.05 x402 on Base.

Finance & CryptoPayments & trading

Responded583 ms14 / 22
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

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