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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4909 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
gleanyard (read-only)

Search gleanyard source recipes and read public gleanyard projects' records and health.

Developer ToolsCode & DevOps

Outdated check56 ms14 / 22
Little Green Light MCP by usefulapi

Search Little Green Light donors, gifts, notes and memberships, and add gifts and contact reports.

ProductivityData access / search

Responded58 ms14 / 22
AIReady

Scan and fix your site's AI discoverability: crawler access, llms.txt, JSON-LD. Free.

Developer ToolsBrowser & web scraping

Outdated check60 ms14 / 22
Raziel Calculators

Free investment and startup math, guide search and prompts: IRR, MOIC, SAFE, QSBS, burn multiple.

OtherData access / search

Responded61 ms14 / 22
SingleOps MCP by usefulapi

Search clients, list operations and custom inputs; create leads in SingleOps.

Marketing & SalesData access / search

Responded61 ms14 / 22
Order Desk MCP by usefulapi

Search Order Desk orders and inventory; read order items and shipments; create or update orders.

Developer ToolsData access / search

Responded62 ms14 / 22
Job Spotter

Search current US and UK job listings by role and place, title matches first.

Developer ToolsCode & DevOps

Outdated check62 ms14 / 22
Crawl Census

Ask before you fetch: will this domain serve your crawler, refuse it, or charge it?

GovernmentBrowser & web scraping

Responded63 ms14 / 22
janbrennenstuhl.eu

Search, read and cite Jan Brennenstuhl's essays on AppSec, identity and agent identity.

Developer ToolsData access / search

Outdated check63 ms14 / 22
secondlayer

Stacks chain data: contracts, events, transfers, subgraph scaffolds. Hosted with browser sign-in.

LegalKnowledge & memory

Responded64 ms14 / 22
io.github.AtlasDigitalDesign/intertwine-plans

Search Angela Kamer's coastal house plans by beds, sq ft, lot width, pilings and elevator.

Developer ToolsCode & DevOps

Outdated check66 ms14 / 22
IntakeQ MCP by usefulapi

Search clients, appointments, intakes, notes and invoices in IntakeQ, and book or cancel visits.

Finance & CryptoPayments & trading

Responded68 ms14 / 22
AgentScout

Read-only search over 2,065+ AI agent tools and 276 MCP servers. Free, no sign-up needed.

Developer ToolsData access / search

Responded69 ms14 / 22
DiamondPaintingWinkel.nl shop advisor

Search diamond painting kits, get size and price advice for your own photo, shop info. No login.

MediaCode & DevOps

Responded69 ms14 / 22
GenPM

Search, inspect and inject full source modules (code + AI rules + MCP) pinned to a Git commit.

Developer ToolsCode & DevOps

Outdated check69 ms14 / 22
Robot Skill Hub

Search robot code and exact-version findings; check evidence before preparing with the Hub CLI.

Developer ToolsCode & DevOps

Responded70 ms14 / 22
Eremos Thai Bible

Quote the Eremos Translation (Thai Bible, CC0) word for word: passages, search, decision notes.

ProductivityData access / search

Outdated check71 ms14 / 22
AI SENSE Free Public Tools

87 public tools: agent workflows, audio data transfer, semantic search, queues and webhooks.

MediaAutomation & workflows

Outdated check71 ms14 / 22
Droppy docs

Search and read the Droppy for Mac handbook, droplets, DroppyKit SDK and release notes.

ProductivityData access / search

Responded73 ms14 / 22
Sellsy MCP by usefulapi

Search and read Sellsy companies, contacts, opportunities, invoices and tasks; create records.

Finance & CryptoPayments & trading

Responded73 ms14 / 22
HuntBoard

Search real, recent job postings from company career pages and ATS boards, scored for fit.

ProductivityData access / search

Responded75 ms14 / 22
TheSkillVault

Search and fetch vibe-coding Agent Skills (SKILL.md files) and prompts from TheSkillVault library.

Developer ToolsData access / search

Outdated check76 ms14 / 22
Stoic Sage

Semantic search and citation of Stoic texts: Marcus Aurelius, Seneca and Epictetus.

OtherKnowledge & memory

Responded77 ms14 / 22
OmniForce

AI-search visibility: GEO audits, tracked prompts, competitors, citations.

Developer ToolsCode & DevOps

Outdated check78 ms14 / 22

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