MCP HeartbeatTHE MCP OBSERVATORY
Public workspace

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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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5788 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
Excession Labs: site search and security test requests

Search excessionlabs.ai, the site of Excession Labs, a security lab, and request a security test.

OtherData access / search

Responded71 ms16 / 22
A2UI Atomic Catalog docs

Search the A2UI Atomic Catalog's own docs: auth, versioning, pricing, API surface.

OtherData access / search

Responded225 ms16 / 22
COTAL actions (cotal.ai)

cotal.ai actions: product overview, site search, build log, feedback, Cloud waitlist, updates, calls

OtherData access / search

Responded430 ms16 / 22
AgentMart core tools

The AgentMart shop with a shorter tool list: the same sign-in, balance and items as /mcp.

E-commerceData access / search

Responded541 ms16 / 22
Cerebrium Docs

Search the Cerebrium docs: deployment, cerebrium.toml, hardware, endpoints. Also sends feedback.

OtherData access / search

Responded776 ms16 / 22
DABYTE AI Visibility Index

Measured share of answer for 20 SaaS brands. An open dataset, not an audit of your site.

Data & AnalyticsData access / search

Responded836 ms16 / 22
DeepDNA

Pharmacogenomics for AI agents: cited drug–gene, gene and rsID lookups plus a medication screen.

HealthcareData access / search

Responded1277 ms16 / 22
Chinaready China Market-Entry Search

Read-only search over chinaready.co — China market entry for Western software teams.

OtherData access / search

Responded51 ms15 / 22
OboeLib — Conservatory Oboe Fingering, Half-Hole, Forked F & Trill Chart Engine

Look up Conservatory oboe fingerings, half-hole, left/forked F rules, octave keys & trills.

Developer ToolsData access / search

Responded66 ms15 / 22
OTInstaller Registry

Read-only search of the OTInstaller registry of OSINT tools and guides, with consent classes.

OtherData access / search

Responded69 ms15 / 22
easygroupflights

Group flight quotes for parties of 10 or more passengers.

TravelData access / search

Responded72 ms15 / 22
Akashi Notari

Proof of existence for files: anchor a SHA-256 hash on Base, look up proofs. Paid with x402.

Developer ToolsData access / search

Responded74 ms15 / 22
TbmLib — Tenor & F-Attachment Trombone Slide Position & Overtones Engine

Look up Tenor & F-attachment trombone slide positions (1st-7th), F-trigger & pitch adjustments.

Developer ToolsData access / search

Responded75 ms15 / 22
Web Search API Eval

Web search API benchmark for AI agents: You.com, Tavily, Exa, Parallel. Results and charts.

Developer ToolsData access / search

Responded80 ms15 / 22
Termcard

Create terminal business cards (npx <name>) in a chat, or look up anyone's card.

Developer ToolsData access / search

Responded80 ms15 / 22
MassageInChina — Authentic TCM Tuina, Acupressure Points & Bilingual Clinic Phrasebook

Look up Traditional Chinese Medicine (TCM) Tuina massage styles, meridian acupoints & phrases.

HealthcareData access / search

Responded80 ms15 / 22
LabelQueue — Avery Label Dimensions, Margin & Bleed Layout Engine

Look up exact Avery & standard sheet label dimensions, pitch, margins & print layout specs.

Developer ToolsData access / search

Responded84 ms15 / 22
GingerLive

GingerLive livestream ad formats, network reach stats, campaign case studies, and streamer program.

Marketing & SalesData access / search

Responded85 ms15 / 22
Zaps

Photos and a brief in, finished social-media designs out. First design free, no account.

Marketing & SalesData access / search

Responded87 ms15 / 22
esimgomobile — Travel eSIM Tools

Travel eSIM plan catalog, coverage and trip-planning tools for agents and developers.

TravelData access / search

Responded91 ms15 / 22
Thailand Fun Experiences

Phuket activity search with live weather, sea state, transfer times and party-fit filtering.

Data & AnalyticsData access / search

Responded92 ms15 / 22
ROAS Expert free AI SEO audit

Free AI SEO audit, product page check, agent readiness check and site comparison. No key.

Marketing & SalesData access / search

Responded94 ms15 / 22
Pentest requests, security headers checker, guides

Request a penetration test, grade a website's HTTP security headers, and search pentest guides.

SecurityData access / search

Responded96 ms15 / 22
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

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