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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18175 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
HornLib — Interactive French Horn F/Bb Double Horn Fingering & Harmonics Engine

Look up French Horn F/Bb double horn valve fingerings, trigger combinations & partials.

Developer ToolsData access / search

Responded97 ms15 / 22
saagarpatel.dev Portfolio

Agent-native MCP server over the public saagarpatel.dev corpus. Read-only, stateless.

Developer ToolsCode & DevOps

Responded98 ms15 / 22
The Agent Lounge

A guestbook for AI agents: read what other agents wrote, sign it yourself, and check the counters.

Developer ToolsCode & DevOps

Responded98 ms15 / 22
Ocean of Jobs

Search 1.2M+ open jobs from 22k companies, read full listings and look up employers.

Developer ToolsData access / search

Responded98 ms15 / 22
pump.fun launch feed + trend radar

Live pump.fun launches matched to Google Trends and Polymarket topics; pay per call with x402

Developer ToolsCode & DevOps

Responded99 ms15 / 22
Notify Sound

Design notification sounds from layered tones and get an editor link to play and download.

Developer ToolsCommunication & messaging

Responded99 ms15 / 22
Flaim Fantasy

Fantasy analysis for your ESPN, Yahoo, and Sleeper leagues. Reads your leagues, never changes them.

Developer ToolsCode & DevOps

Responded99 ms15 / 22
LicenseGuard

Check if a dependency's license obligates you, based on how you ship. npm, PyPI, Go.

Developer ToolsCode & DevOps

Responded100 ms15 / 22
Microlaunch

Find tools and apps by indie makers: top launches, categories, product details and deals.

Developer ToolsCode & DevOps

Responded100 ms15 / 22
Banco Central do Brasil (BCB) — SGS Time Series MCP Server

Banco Central do Brasil (BCB): SGS series, Focus expectations, PTAX, stats + provenance. 17 tools.

Developer ToolsCode & DevOps

Responded101 ms15 / 22
Art Spotter - Eye of the Beholder

Original art and prints from independent artists, fair prices, and help for artists to sell.

Developer ToolsCode & DevOps

Responded101 ms15 / 22
SL – Stockholm public transport

Stockholm public transport (SL): live departures, trips to addresses with exits, disruptions.

Developer ToolsCode & DevOps

Responded101 ms15 / 22
Polyxd

Write Polyxd UI documents, check them, and show them as real screens in any design-system pack.

Developer ToolsFile & docs

Responded101 ms15 / 22
Forest Factory

Paid x402 agent: API discovery,commerce availability/buyable,domain/package preflight,release asset

Developer ToolsCode & DevOps

Responded102 ms15 / 22
Invokary Platform Requirements

What Claude, ChatGPT, Cursor and the MCP Registry require to list an MCP connector or plugin.

Developer ToolsAI / LLM tooling

Responded102 ms15 / 22
Lotus Wisdom

Contemplative reasoning with Lotus Sutra wisdom framework and ext-apps visualization.

Developer ToolsCode & DevOps

Responded103 ms15 / 22
Dueback

Outcome-based bill negotiation — pay only a percentage of bank-verified savings. Free to try.

Developer ToolsCode & DevOps

Responded103 ms15 / 22
Amtsblick

Wetter und Pegel je Gemeinde in Österreich. Privates Projekt, kein offizielles Behördenangebot.

Developer ToolsCode & DevOps

Responded106 ms15 / 22
AgentMsgr

Group chat for agents: 9 tools — messages, replies, briefings, approvals, wake links, setup reports.

Developer ToolsCode & DevOps

Responded106 ms15 / 22
PersonalKnowHow

Live public demo: query one person's learning and work history as a knowledge graph via MCP.

Developer ToolsCode & DevOps

Responded107 ms15 / 22
MAC Address Lookup

Find the organization behind a MAC address or OUI prefix in the IEEE registries. No auth, no key.

Developer ToolsData access / search

Responded107 ms15 / 22
CKB Pulse

Who builds on Nervos CKB, from public GitHub: projects, people, updates, DAO-funded work. Read-only.

Developer ToolsCode & DevOps

Responded108 ms15 / 22
Lavenders (LAVNDR120)

Read-only facts on Lavenders (LAVNDR120): packages, prices, FAQ and the live consumer index card.

Developer ToolsCode & DevOps

Responded109 ms15 / 22
CSS SOTA

What CSS you can actually ship today, from live Baseline data and MDN browser-compat-data.

Developer ToolsCode & DevOps

Responded110 ms15 / 22

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