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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1497 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
Toolcall

30 pay-per-call APIs for AI agents: compliance, trade, safety, web, data. USDC on Base via x402.

Finance & CryptoPayments & trading

Outdated check119 ms14 / 22
Hacker Bob public records

Read-only public CVE records, capability metadata, and agent instructions from Hacker Bob.

GovernmentCode & DevOps

Outdated check125 ms14 / 22
MCP x402 - Evidence-Backed Web Verification

Evidence-backed pre-purchase checks for offer terms, seller trust and policy compliance.

Developer ToolsCode & DevOps

Outdated check130 ms14 / 22
net.arclera/arclera

Read-only company facts for ARCLERA DIGITAL, LLC: contact, services, legal identity.

LegalKnowledge & memory

Outdated check133 ms14 / 22
io.github.parkyucheol-del/alphapipeline

Pay-per-call x402 API for AI trading agents: pre-trade security checks, Polymarket & HIP-4 odds.

Finance & CryptoPayments & trading

Outdated check143 ms14 / 22
FrankKi

The agentic layer of letters. Agents send real printed mail worldwide, German compliance built in.

Developer ToolsCode & DevOps

Outdated check148 ms14 / 22
Presend MCP Server

Before an AI agent installs an npm/PyPI package: typosquat, vulnerability and existence checks.

Developer ToolsCode & DevOps

Outdated check171 ms14 / 22
Castle MCP by usefulapi

Investigate security events and manage the allow/deny lists an analyst acts on.

Developer ToolsCode & DevOps

Outdated check179 ms14 / 22
COLA Insight

Read-only Social Security COLA data, calculations, history, and official source links.

Developer ToolsCode & DevOps

Outdated check194 ms14 / 22
Hail

Phone, SMS and email for AI agents. One remote MCP endpoint, OAuth login, zero install.

ProductivityCommunication & messaging

Outdated check199 ms14 / 22
AILANG Parse

Parse, convert and create Office and PDF documents. OAuth at /mcp/connect/, API key at /mcp/.

Developer ToolsFile & docs

Responded202 ms14 / 22
Social Security COLA 2027 MCP

Social Security COLA 2027, full retirement age, earnings test and 2027 limits from SSA notices.

Developer ToolsCode & DevOps

Outdated check206 ms14 / 22
io.github.pscale-commons/bsp-mcp

Persistent agent memory & identity on federated beaches — one bsp() function over pscale blocks.

TravelCode & DevOps

Outdated check209 ms14 / 22
io.github.beneb89/changegamer

Agent-first resource directory for AI agents: protocols, security, RAG, memory, evals, and more.

Developer ToolsCode & DevOps

Outdated check219 ms14 / 22
CVE Risk Check

Triage a CVE: how severe it is, whether it is exploited, and how likely exploitation is.

SecurityMonitoring & observability

Outdated check238 ms14 / 22
ContrastAPI

55 tools, 7 Resources, Sigma rules, email SPF/DMARC, MITRE, CVE/KEV, risk_score. No key.

ProductivityCommunication & messaging

Outdated check303 ms14 / 22
dev.cz-agents/eu-registry

EU company registry lookup: 16 countries incl. Lithuania (JAR: identity + legal status).

LegalData access / search

Outdated check309 ms14 / 22
XRPL Token Guard

Read-only XRP Ledger token-risk, issuer-authenticity and wallet-security checks.

Finance & CryptoPayments & trading

Outdated check325 ms14 / 22
Velox TriFit: Virtual Try-On API

Virtual try-on (VTO) API docs and SDK examples; OAuth account/guest photo uploads and try-ons.

Developer ToolsCode & DevOps

Responded353 ms14 / 22
Vextorium

200+ x402 APIs for AI agents: official statistics, crypto prices, compliance and web tools.

GovernmentPayments & trading

Outdated check356 ms14 / 22
nyna — AI wedding planner

Wedding provider directory, gift ideas, and a couple's own wedding plan behind OAuth.

OtherOther

Outdated check367 ms14 / 22
Easy!Appointments

Find open slots, book, move and cancel Easy!Appointments bookings, with OAuth and a call log.

OtherOther

Outdated check381 ms14 / 22
Goalz

Manage your Goalz football manager account via hosted OAuth MCP.

MediaCode & DevOps

Outdated check390 ms14 / 22
Nymrel

Four public utilities plus seven OAuth-protected Remote read tools for paired Nymrel devices.

Developer ToolsCode & DevOps

Outdated check471 ms14 / 22

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