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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7711 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
calcu.mx — calculadoras de México

Calculadoras de México: sueldo neto e ISR, IVA, inflación (INPC), pensión IMSS Ley 73 y liquidación

OtherOther

Responded620 ms14 / 22
Italian B2B Lead List Scoring, Ranking & JSON Decisions

Prioritize an existing Italian B2B lead list into up to 250 explained JSON decisions.

OtherOther

Responded620 ms14 / 22
Rust Crate Release Tracker — new cargo packages from crates.io (cratewatch)

New Rust crates & cargo package releases. $0.01/query. Be born in one call — free testnet funds.

OtherOther

Outdated check620 ms14 / 22
Radix Wiki

Community-maintained knowledge base for Radix DLT — search, read, and contribute wiki pages.

OtherKnowledge & memory

Responded623 ms14 / 22
Upfit Plan Builder

Read-only bodyweight workout builder and exercise form cues from the Upfit iPhone app.

OtherOther

Responded623 ms14 / 22
llms.txt Generator

Create, validate and audit llms.txt, incl. the Lighthouse Agentic Browsing check.

OtherOther

Responded623 ms14 / 22
SwishrJobs

Deterministic digital jobs with independently verified deliverables.

OtherOther

Responded624 ms14 / 22
ResearchCal

Research conference and call for papers deadlines by field, each linked to its official source.

OtherOther

Responded624 ms14 / 22
PedalBro

Guitar pedal specs, new and used prices, price history, review scores, board checks, buying guides.

OtherOther

Responded624 ms14 / 22
Energy Drink Ratings

Label facts (caffeine, sugar, ingredients) and community ratings for 1,000+ energy drinks.

OtherOther

Responded625 ms14 / 22
Timezone Truth

Convert times between IANA zones and detect skipped or ambiguous DST local times.

OtherOther

Responded628 ms14 / 22
Zakazat Zvezdu — book pop stars

Book Russian pop stars for corporate events and parties: search by genre, fees, profiles, requests.

OtherData access / search

Responded628 ms14 / 22
Lunonis Astrology

Birth charts, synastry and birth-place search from an ephemeris. Free, read-only, nothing stored.

OtherData access / search

Responded631 ms14 / 22
memecub

Find memes and Chinese 表情包, auto-place them into articles, or draw custom memes with AI.

OtherOther

Responded632 ms14 / 22
Gigstereo

Find event providers in Colombia (DJs, mariachis, photographers), see prices and request quotes.

OtherOther

Responded632 ms14 / 22
PageCritic

Audit a landing page's conversion (score, top issues, fixes) and check if AI crawlers can read it.

OtherBrowser & web scraping

Responded632 ms14 / 22
Rexity Website-Check

Checks a public website in six areas and returns scores from 0 to 100. Free, no key needed.

OtherOther

Responded632 ms14 / 22
upTake

See which posts, links and releases bring visits, signups and revenue, and draft the next posts.

OtherOther

Responded633 ms14 / 22
AnonPing

User-authorized anonymous matching and text conversations, with revocable OAuth permissions.

OtherOther

Responded633 ms14 / 22
The Pantry Butler

Answers 'what can I cook tonight?' from your own saved recipes and what's really in your kitchen.

OtherOther

Responded634 ms14 / 22
NutsGrowth

Startup and SaaS tools and their alternatives, with prices and when a person last checked them.

OtherOther

Responded634 ms14 / 22
UnscrambleKey

Unscramble letters, find anagrams, solve Wordle and patterns, list words and score them in Scrabble.

OtherOther

Responded635 ms14 / 22
Aviation Resources

Search FAA handbooks and Airman Certification Standards; read and cite pages with figures.

OtherData access / search

Responded636 ms14 / 22
CELPass: CELPIP practice and CRS calculator

CELPIP practice questions with answers, sample answers, and Canada's November 2026 CRS calculator.

OtherOther

Responded636 ms14 / 22

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