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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4898 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
Ratevert MCP

Read-only Ratevert MCP for asset search, pair rates, and conversions.

Developer ToolsData access / search

Outdated check271 ms15 / 22
BumbleBox

Search and triage all your mailboxes; draft replies and campaigns; send only as you allow.

Marketing & SalesData access / search

Outdated check272 ms15 / 22
audioknihy.cz Catalog

Czech audiobook catalog MCP server. Search 12 000+ titles + compare prices across 5 partners.

OtherData access / search

Outdated check274 ms15 / 22
NPMScan

Detect malicious or vulnerable npm packages: registry search, OSV.dev and GitHub advisory lookups

Developer ToolsData access / search

Responded275 ms15 / 22
Agent Stack Directory

Search, inspect and compare infrastructure tools for AI agents from a checked directory.

Developer ToolsData access / search

Outdated check276 ms15 / 22
UnoRouter

Search 200+ UnoRouter models (most free), check pricing, and chat through one key

Developer ToolsData access / search

Outdated check296 ms15 / 22
Padel Expert Lab

Padel racket comparator for France and Belgium, in French: search, brand specs, profile-based picks.

OtherData access / search

Outdated check307 ms15 / 22
Vadivam Icons

Search 24px outline icons by name, tag, or category and get SVG or framework code.

Developer ToolsCode & DevOps

Responded309 ms15 / 22
Index Agentica

Search a curated directory of agent tools, MCP servers, APIs, protocols and skills. No auth.

Developer ToolsData access / search

Outdated check320 ms15 / 22
fysio.care clinic discovery

Discover Swedish MSK clinics on fysio.care: search clinics, services, and open appointment times.

HealthcareData access / search

Outdated check353 ms15 / 22
Product catalog

Search a product catalog for a title, price, pictures, and a page where it can be bought.

E-commerceCode & DevOps

Responded362 ms15 / 22
BMLT Meetings

Search Narcotics Anonymous meetings worldwide via the BMLT directory.

Developer ToolsCode & DevOps

Outdated check365 ms15 / 22
Neuronto ARD Registry: Agentic Resource Discovery (ARD) Index

Agent Resource Discovery (ARD, IETF draft) registry: search every ARD registry + verified MCP tools

Developer ToolsData access / search

Outdated check369 ms15 / 22
SEC EDGAR Insider Trades & Financials

SEC EDGAR for agents: Form 4 insider trades, cluster buys, filings, XBRL financials and search.

Developer ToolsCode & DevOps

Responded370 ms15 / 22
DomainKits

Search newly registered, expired, aged, active, deleted and for-sale domains, plus WHOIS and DNS.

Developer ToolsCode & DevOps

Outdated check371 ms15 / 22
4dayweek.io Jobs

Search reduced-hours jobs and employers: 4-day weeks, 9-day fortnights, half-day Fridays and more.

OtherData access / search

Outdated check375 ms15 / 22
Source Library

Search 15K rare pre-modern texts translated to English: philosophy, religion, science, literature.

Developer ToolsCode & DevOps

Responded384 ms15 / 22
freeq

Read and verify freeq conversations: channels, history, search, signatures, pins.

Developer ToolsCode & DevOps

Responded402 ms15 / 22
Vibes-Coded Agent Tools

Web search, page-to-markdown, memory, leases and proof for agents. x402, no signup.

Developer ToolsData access / search

Responded406 ms15 / 22
SkyAccess

Search 5,000+ live empty leg flights, get charter estimates and booking links. Free, no API key.

TravelData access / search

Outdated check413 ms15 / 22
Online Poll Maker

Create poll drafts on onlinepollmaker.com. Free, no sign-up; you review and publish in the browser.

Developer ToolsCode & DevOps

Responded415 ms15 / 22
Scigantic

Search public scientific datasets and read schema cards that describe their files, columns and rows

Data & AnalyticsData access / search

Outdated check421 ms15 / 22
Spin Wheel Names

Spin a random picker wheel, pick a random number, and search shared wheels from spinwheelnames.com.

Developer ToolsCode & DevOps

Responded427 ms15 / 22
Atom.com — Premium Domains

Search, appraise, trademark-check, and buy premium brandable domain names from Atom.com.

LegalData access / search

Outdated check433 ms15 / 22

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