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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3324 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
Kognai Kreativ: images and short videos by agents

One reviewed image or one 8 second video from a text prompt. Paid per call by x402, no account.

MediaPayments & trading

Responded641 ms14 / 22
TorrentSwap

No-account cross-chain crypto swaps (BTC, ETH, SOL, USDT, ZEC…) for AI agents. Flat 0.5% fee.

Finance & CryptoPayments & trading

Responded645 ms14 / 22
ServerScan

PCI ASV scan prices, SAQ check, free payment page check, PCI guides and scan-failure fixes.

Finance & CryptoPayments & trading

Responded649 ms14 / 22
CriptoNoticias Brasil

Notícias cripto do Brasil (pt-BR) com N fontes e citação pronta. Brazilian crypto news, cited.

Finance & CryptoPayments & trading

Responded649 ms14 / 22
Diamond Bitcoin Intelligence

Bitcoin MCP for fee budgets, transaction proofs and address checks. Free service discovery.

Finance & CryptoPayments & trading

Responded650 ms14 / 22
WalletProfit

Analyse crypto wallets (EVM, Solana, Bitcoin) and compare DeFi lending, borrowing and pool rates.

Finance & CryptoPayments & trading

Responded653 ms14 / 22
GrowVib: Social Media Growth

Discover, compare and buy social media growth (Instagram, TikTok, YouTube, Telegram, X); x402 ready

Marketing & SalesCommunication & messaging

Responded657 ms14 / 22
LiquiLens Trade Safety Gateway

Read-only checks for proposed orders against evidence and policy; no trading or payment authority.

Finance & CryptoPayments & trading

Outdated check657 ms14 / 22
Assay A2A, MCP & x402 Pre-Flight Verifier & Observatory

Live behavioral security verifier, schema auditor, and trust oracle for A2A, MCP & x402 agents.

TravelPayments & trading

Outdated check659 ms14 / 22
Heed

Tax intelligence for lives across borders: residency days, rates, rules and moves, as the member.

Finance & CryptoPayments & trading

Responded661 ms14 / 22
SCRIPTMASTERLABS — GatePay

Policy-gated Arc payment routing: hard caps, signed mandates, hash-chained proof.

Finance & CryptoPayments & trading

Responded661 ms14 / 22
Roth Conversion Calculator

Optimal Roth conversion plan by year: amounts, tax, and after-tax wealth vs no conversion. Free.

Finance & CryptoPayments & trading

Responded670 ms14 / 22
Decision Integrity

Paid x402 evaluator for evidence, warrant, provenance, and represented action authority.

Developer ToolsCode & DevOps

Responded678 ms14 / 22
io.github.0rkz/byte-protocol

PayPerByte — per-byte data for AI agents: x402 USDC on Base, EIP-712-attested. No token.

Finance & CryptoPayments & trading

Outdated check685 ms14 / 22
PumpPill — token safety and measured outcomes

Pre-trade risk check for agents; Robinhood Chain launches, flow, swaps, safety; Solana; x402

Finance & CryptoPayments & trading

Responded698 ms14 / 22
Aldro: small-business tax

US and Canada business tax deadlines, annual reports, sales tax permits and quotes, with sources.

Finance & CryptoPayments & trading

Responded702 ms14 / 22
sigtap Agent Tools

13 paid x402 tools, USDC/Base. Free check: GET /preview<path>=200 sample. Copy-paste pay: /llms.txt

Finance & CryptoPayments & trading

Responded704 ms14 / 22
Accounts Payable — Charge 3pl Invoice Audit — Verdant Springs Industrial Supply (749db5bd)

Free to compete: testnet faucet funds everything. 12 synthetic charge 3pl invoice exception cases:…

Finance & CryptoPayments & trading

Outdated check714 ms14 / 22
LocationLists

US business location data: search, sample, count, query rows or buy CSVs (Stripe or x402 USDC).

Finance & CryptoPayments & trading

Outdated check725 ms14 / 22
HomeCalc — Canadian Mortgage & Tax Calculators

34 read-only Canadian mortgage, tax and home-buying tools, including nationwide LTT coverage.

Real Estate & PropertyData access / search

Responded741 ms14 / 22
io.github.AgentTanuki/x402-payment-safety

Authorize x402 payments before signing with request-bound, signed safety decisions.

Finance & CryptoPayments & trading

Responded755 ms14 / 22
AISkills402

Tested AI agent skill files (SKILL.md), bought once over x402 for cents on Base. Free MCP search.

Finance & CryptoData access / search

Responded756 ms14 / 22
Hunt Auto Group Texas: guides

Search and read Texas used-car buying guides (title, tax, inspection, reviews) as Markdown.

Finance & CryptoFile & docs

Responded759 ms14 / 22
GhOsT77 crypto data + security

Read-only crypto tools via x402 (USDC/Base): Hyperliquid, DD, DeFi, rugs, bridges. +security reviews

Finance & CryptoPayments & trading

Responded765 ms14 / 22

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