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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4741 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
AgentLot Marketplace

AI marketplace for agents to find paid work and trade digital services via MCP and x402.

Finance & CryptoPayments & trading

Responded151 ms10 / 22
Agent Domain Search

Agent-first domain registration and DNS management, paid with USDC via x402.

Finance & CryptoPayments & trading

Responded307 ms10 / 22
AgentGrade

Scan any website for AI agent readiness, payment protocols, and discovery endpoints

Finance & CryptoPayments & trading

Responded312 ms10 / 22
com.textforagents/paid-call-checkout-conformance-probe

Pays your endpoint like a stranger would and signs a checkout conformance verdict.

Finance & CryptoPayments & trading

Responded334 ms10 / 22
Duty & Rest for agents

Cross-session fatigue ledger for agents: FIT/CAUTION/GROUNDED dispatch gating.

Finance & CryptoPayments & trading

Responded336 ms10 / 22
CreditLabs

Credit payment and amortization calculations, editorial sources and simulator discovery.

Finance & CryptoPayments & trading

Responded364 ms10 / 22
Wheeler Hubbell Publishing Standing Mark

Signed, object-bound claim examinations. 1.00 USDC on Base via x402. Free verification.

Finance & CryptoPayments & trading

Responded405 ms10 / 22
Home-Services Agent Network

Home-services agent network: registry of local pros, standard job-request form, receipts ledger.

Finance & CryptoPayments & trading

Responded440 ms10 / 22
Forecast Calibration Ledger: agent self-forecasts, resolved and scored

Signed agent self-forecasts, resolved and scored per cohort, with a self-killing trust weight.

Finance & CryptoPayments & trading

Responded447 ms10 / 22
xportalx

AI agent gateway with web fetching, data extraction, crypto pricing, and x402 payments

Finance & CryptoPayments & trading

Responded452 ms10 / 22
InsureLink

AI agent-to-agent SLA agreements on Base with insurance, reputation, and x402 payments.

Finance & CryptoPayments & trading

Responded741 ms10 / 22
NexusSDR AI — 4-Agent B2B Buying-Intent & Outbound MCP Server

Generate B2B buying-intent dossiers, ICP signals & multi-touch outbound sequences via MCP & x402.

Finance & CryptoPayments & trading

Responded1096 ms10 / 22
AgentStack (agentstack.tech)

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

Finance & CryptoPayments & trading

Unreachable337 ms10 / 22
FillStub - options trading journal

Options journal from broker exports: contract lifecycle, Section 1256 vs 8949 tax split, intervals

Finance & CryptoPayments & trading

Responded75 ms9 / 22
404KIN FIELD Transaction Intent

Token intent checks; no simulation/signing. Free trial ends 2026-09-25. No NFT required.

Finance & CryptoAI / LLM tooling

Responded98 ms9 / 22
agentshop — cross-country economic reports

Economic reports for 20 economies, 2015-2025. Search free, pay per fetch in USDC on Base via x402.

Finance & CryptoPayments & trading

Requires auth1438 ms9 / 22
com.ainetcafe/ai-netcafe

Tables and ledgers checked by arithmetic, not by a model. 24 tools. MCP 2026-07-28 ready.

Finance & CryptoPayments & trading

Unreachable2073 ms9 / 22
Fivebar Trading

Trading tools for AI agents: token risk checks, swap quotes, unsigned swaps, holdings on 5 chains.

Finance & CryptoPayments & trading

Unreachable269 ms9 / 22
IFSO

Conditional USDG payments on Robinhood Chain: look up, explain and prepare if-so payments.

Finance & CryptoData access / search

Unreachable732 ms9 / 22
CrossingKey MCP

Agent-native MCP for governed commerce, x402 payments, paid capabilities, and verifiable receipts.

Finance & CryptoPayments & trading

Unreachable1410 ms9 / 22
Kerne Honesty Index

Advertised versus realized yield for stablecoin vaults, signed hourly, reproducible from chain.

Finance & CryptoPayments & trading

Unreachable720 ms9 / 22
Ghostdom

Headless-browser-as-JSON with memorymarket cache economics. Real Chromium, crypto settlement.

Finance & CryptoBrowser & web scraping

Responded83 ms8 / 22
SolidInvoice

Create and send invoices and quotes, manage clients, and track payments in SolidInvoice.

Finance & CryptoPayments & trading

Requires auth214 ms8 / 22
x402 Tools

Pay-per-call research tools for AI agents, paid via x402 USDC. Remote MCP, one free tool.

Finance & CryptoPayments & trading

Requires auth801 ms8 / 22

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