MCP HeartbeatTHE MCP OBSERVATORY
Public workspace

Explore

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.

Connect your agent

40876 servers

Ordered by checks passed
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
DoorLoop MCP by usefulapi

Read DoorLoop properties, units, leases, tenants and payments; create tasks and task updates.

Real Estate & PropertyPayments & trading

Responded138 ms15 / 22
CentralStationCRM MCP by usefulapi

Read CentralStationCRM people, companies, deals, tasks; create and update people, companies, deals.

Developer ToolsCode & DevOps

Responded138 ms15 / 22
Stellara

Plain-language astrology: birth chart wheel, sun sign, transits and celebrity star matches (en/nl).

Developer ToolsCode & DevOps

Responded138 ms15 / 22
FindAIforWork Directory

Search and compare AI tools for work from a curated, read-only directory.

Developer ToolsCode & DevOps

Outdated check138 ms15 / 22
Private SuperIntelligence

Private SuperIntelligence by Mitosis Labs: define the term, see privacy layers, join the waitlist.

OtherOther

Responded139 ms15 / 22
Lightspeed Retail (R-Series) MCP by usefulapi

Read Lightspeed R-Series items, stock, sales, customers and POs; create customers and set stock.

Finance & CryptoPayments & trading

Responded139 ms15 / 22
EZRentOut MCP by usefulapi

MCP server for EZRentOut — rental orders, assets, customers, inventory and work orders.

Developer ToolsCode & DevOps

Responded139 ms15 / 22
apiwatch

Is this model or API still safe to call? Retirement and breaking change dates, with the fix.

Developer ToolsCode & DevOps

Responded139 ms15 / 22
FDA import alert red lists

Is a foreign supplier on an FDA import alert red list, detained at the US border? 14,000+ listings.

Developer ToolsCode & DevOps

Outdated check139 ms15 / 22
Enchant MCP by usefulapi

Work with Enchant help desk tickets: list, read, reply, add notes and labels, manage customers.

ProductivityFile & docs

Responded140 ms15 / 22
Census MCP by usefulapi

List reverse-ETL sources, destinations, models, syncs and runs; trigger syncs into SaaS tools.

GovernmentData access / search

Responded140 ms15 / 22
Perigee

Positions, distances, mission facts and 3D views of objects orbiting the Earth, Moon, Mars and Sun.

Developer ToolsCode & DevOps

Outdated check140 ms15 / 22
Eviduct — Independent MCP Discovery

Read-only MCP discovery with direct network observations and no paid rankings.

Developer ToolsCode & DevOps

Responded141 ms15 / 22
aft.page

Deploy a folder, build output, or public GitHub repo to a live URL. Update, roll back.

Developer ToolsCode & DevOps

Responded141 ms15 / 22
Linear MCP by usefulapi

Search, read and create Linear issues, projects, teams and cycles.

Developer ToolsData access / search

Responded141 ms15 / 22
Financial Modeling Prep MCP Server

MCP server for Financial Modeling Prep API with 250+ financial data tools

Developer ToolsCode & DevOps

Outdated check141 ms15 / 22
yieldhunter

Risk-adjusted stablecoin yield ranks for other agents. Research only. Never holds keys or executes.

Finance & CryptoPayments & trading

Outdated check141 ms15 / 22
InjectScan

Prompt-injection scanner for agents: risk score, categories and spans for text, pages, MCP tools

Developer ToolsCode & DevOps

Outdated check141 ms15 / 22
Digital Gemology: gem identification and gemstone properties

Identify 36 gems by refractive index, birefringence, SG, pleochroism and spectrum; cut scores in 30

OtherOther

Outdated check141 ms15 / 22
DNSimple MCP by usefulapi

MCP server for DNSimple — domains, DNS zone records, availability, pricing and contacts.

Developer ToolsCode & DevOps

Responded142 ms15 / 22
Billy MCP by usefulapi

Read Billy invoices, bills, contacts, products and postings; create contacts and draft invoices.

Finance & CryptoPayments & trading

Responded142 ms15 / 22
Agent Tools MCP

32 free MCP tools for data validation, text optimization, and synthetic test data.

Developer ToolsCode & DevOps

Responded142 ms15 / 22
SCVD General Store

Evidence observatory: x402/MPP inspection, signed receipt checks and settlement attestations.

Finance & CryptoPayments & trading

Responded143 ms15 / 22
JobNimbus MCP by usefulapi

Manage JobNimbus contacts, jobs, tasks, estimates and invoices from chat.

Finance & CryptoPayments & trading

Responded143 ms15 / 22

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