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

3302 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
Genesis402 by UnyKorn (x402 pay-per-call)

Counterparty checks, sanctions screening, company lookup and 360+ pay-per-call APIs over x402.

Developer ToolsCode & DevOps

Outdated check677 ms15 / 22
SCRIPTMASTERLABS — x402 Gateway

OMNIGATE by ScriptMasterLabs: x402 gateway + facilitator — Base/Arc USDC, 117+ services, no custody.

Finance & CryptoPayments & trading

Outdated check685 ms15 / 22
com.insumermodel/insumer

Wallet auth: send a wallet and conditions, get a signed boolean across 37 chains.

Finance & CryptoPayments & trading

Responded687 ms15 / 22
Mercury402: Treasury/FRED financial data over x402

Treasury/FRED financial data over x402: pay-per-call US yields, macro and forex in USDC on Base

Finance & CryptoPayments & trading

Outdated check687 ms15 / 22
Anyway Possible Agent Utilities

A free tool recommender plus eight x402 tools for payments, merchants, wallets, and web evidence.

Finance & CryptoPayments & trading

Outdated check689 ms15 / 22
TapTax

UK tax: take-home pay, self-employed and company tax, VAT, stamp duty, invoices and MTD.

Finance & CryptoPayments & trading

Responded705 ms15 / 22
Anyway Possible Paid Agent Utilities

Paid x402 tools for merchant intelligence, Base payment readiness, and verifiable web evidence.

Finance & CryptoPayments & trading

Outdated check709 ms15 / 22
Liquid Agent

Money tools for AI agents over x402: USDC bridge to 16 chains, Polymarket data, stocks, USDC gas.

Finance & CryptoPayments & trading

Outdated check725 ms15 / 22
AI Web Research & Research Brief Agent

x402 cited web research and synthesis for agents. $1.99 per completed brief.

Developer ToolsCode & DevOps

Outdated check731 ms15 / 22
io.github.maginaryai/maginary-mcp

AI image + video generation for agents: --flag prompt DSL, async generate/poll, x402 pay-per-use.

MediaCode & DevOps

Responded759 ms15 / 22
Sato Hub: Build Onchain & Crypto Agents

Build any crypto agent: x402, ERC-8004, wallets. Does a server take your key? Hosted? Maintained?

Finance & CryptoPayments & trading

Outdated check762 ms15 / 22
HiddenSwap

No-KYC crypto swaps, no account or email. Read-only quotes, coins, swap links, order status.

Finance & CryptoCommunication & messaging

Outdated check763 ms15 / 22
Boundra — Payment Approval Gateway for AI Agents

Allow, ask, or veto — a policy decision point your agent consults before signing any payment

Finance & CryptoPayments & trading

Outdated check766 ms15 / 22
vet402

Before your agent pays an x402 URL, see whether vet402 paid it and got the content back.

Finance & CryptoPayments & trading

Outdated check775 ms15 / 22
Ichimoku Signal

Free Ichimoku trend; paid signals, levels, scan, setups and Telegram signal alerts via x402.

Developer ToolsCommunication & messaging

Outdated check803 ms15 / 22
RiskState — Crypto Risk Engine

Live BTC/ETH risk state: risk policy, market structure and trading playbooks. Keyless free tier.

Finance & CryptoPayments & trading

Outdated check806 ms15 / 22
Fizzl Buy

Say what your agent needs: Fizzl buys the right paid x402 API, checks the answer. Free pick.

Developer ToolsCode & DevOps

Outdated check807 ms15 / 22
Quietforge x402 Tools

Free tools: x402 endpoint directory + probe, on-chain x402 demand signal, sudoku, API pricing.

Finance & CryptoCode & DevOps

Responded808 ms15 / 22
x402 Endpoint Check (Tanod)

Check an x402 endpoint before you pay it, then test a payment and follow it to settlement.

Finance & CryptoPayments & trading

Outdated check881 ms15 / 22
com.oceanalt/aml

Pre-payment checks for AI agents: sanctions and AML screening of payees, payment pages and requests.

Finance & CryptoPayments & trading

Responded885 ms15 / 22
x402 Micropayments MCP

Pay-per-call US city property compliance and Base tx checks, paid in USDC on Base via x402.

Finance & CryptoPayments & trading

Outdated check894 ms15 / 22
TWZRD Agent Intelligence

Pre-spend trust for AI agents that buy: check x402 services and product listings before paying.

Finance & CryptoPayments & trading

Responded901 ms15 / 22
x402 Doctor

Is this x402/MPP API safe to pay? $0.001 preflight, fixes, a $0.25 test purchase. Free quick check.

Developer ToolsCode & DevOps

Outdated check913 ms15 / 22
Ontario Protocol

Find live x402 APIs for any task (0.005 USDC, no match no charge); Base balance, tx and gas reads.

Finance & CryptoPayments & trading

Outdated check934 ms15 / 22

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