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

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
SENTINEL Compliance Intelligence

AML/CFT compliance oracle: wallet screening, sanctions, PEPs, jurisdiction risk.

LegalPayments & trading

Outdated check629 ms13 / 22
x402 SEC EDGAR Lookup

SEC EDGAR company lookup, filings, XBRL financials and filing text. Pay per call in USDC via x402.

Finance & CryptoPayments & trading

Responded630 ms13 / 22
Block402

Bitcoin RPC for AI agents. 7 read tools; x402 USDC on Base mainnet. Discovery is free.

Finance & CryptoPayments & trading

Responded639 ms13 / 22
Tokenized Stocks & Agent Data (x402)

x402-paid data for agents: tokenized stocks on Base, Solana token verdicts, AI-progress readings

Finance & CryptoPayments & trading

Responded641 ms13 / 22
Movable Capital: verified cash rates

Verified U.S. cash rates (sweeps, savings, money funds, CDs, T-bills), dated, with after-tax math.

Finance & CryptoPayments & trading

Responded641 ms13 / 22
Criptograma

Daily acrostics ES/EN/FR. Preview free; playable $0.01, solved $0.03 USDC (x402, Base).

Finance & CryptoPayments & trading

Outdated check641 ms13 / 22
China Import Quote Preflight

Before-payment check for China quotes to US/EU: costs, low-value rules, and compliance blockers.

Finance & CryptoPayments & trading

Responded643 ms13 / 22
io.github.JasonColapietro/agentic-commerce-catalog

AI music, video, image, and voice tools callable by agents with USDC payments via x402 on Base.

MediaPayments & trading

Responded644 ms13 / 22
Mara Briefing Service

Paid research briefings for agents: $0.10 USDC/question on Base Sepolia via x402. ERC-8004 #9395.

Finance & CryptoPayments & trading

Outdated check650 ms13 / 22
Robyn — Gasless Cross-Chain for AI Agents

Gasless cross-chain for AI agents: 25 nodes incl. Solana & native Bitcoin. One signature, no gas.

Finance & CryptoPayments & trading

Outdated check651 ms13 / 22
Google Play data for agents

7 Google Play endpoints. Pay per call in USDC via x402.

Finance & CryptoPayments & trading

Responded652 ms13 / 22
Subpay Invoice Reader

Reads invoices and receipts from PDF to JSON and checks the math. $0.04/page via x402.

Finance & CryptoPayments & trading

Responded654 ms13 / 22
HumanMirror x402 Microtools + Execution Market + OmniDome Commons

Clean JSON and advisory Safe Preflight: 0.010 USDC per call on Base via MCP and HTTP.

Finance & CryptoPayments & trading

Outdated check654 ms13 / 22
Instagram data for agents

16 Instagram endpoints. Pay per call in USDC via x402.

Finance & CryptoPayments & trading

Responded656 ms13 / 22
cryptofeed402

Hyperliquid perp funding, OI, preflight & news sentiment for agents. Pay per call in USDC (x402).

Finance & CryptoPayments & trading

Responded656 ms13 / 22
Zipp

Multi-language crypto news with editorial sentiment + importance scoring; cites original publisher.

Finance & CryptoPayments & trading

Outdated check656 ms13 / 22
io.github.agtrepo/agtrepo-memory

Encrypted, pay-per-use persistent memory storage for AI agents, gated by x402 payments on Base.

Finance & CryptoPayments & trading

Responded658 ms13 / 22
Responded663 ms13 / 22
App Store data for agents

9 App Store endpoints. Pay per call in USDC via x402.

Finance & CryptoPayments & trading

Responded663 ms13 / 22
Twitter / X data for agents

15 Twitter / X endpoints. Pay per call in USDC via x402.

Finance & CryptoPayments & trading

Responded665 ms13 / 22
Yelp data for agents

4 Yelp endpoints. Pay per call in USDC via x402.

Finance & CryptoPayments & trading

Responded667 ms13 / 22
graded-x402

Discover and call 2,000+ x402 machine-payable services through one graded API key + gateway.

Finance & CryptoPayments & trading

Responded669 ms13 / 22
YouTube data for agents

15 YouTube endpoints. Pay per call in USDC via x402.

Finance & CryptoPayments & trading

Responded669 ms13 / 22
x402 Domain Lookup & DNS Email Auth

Domain lookup (DNS records + RDAP registrar/age/expiry), bulk, and SPF/DKIM/DMARC audit via x402.

ProductivityCommunication & messaging

Responded670 ms13 / 22

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