MCP HeartbeatTHE MCP OBSERVATORY
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Evidence for your next connection.

Independent measurements of remote MCP servers. Every observation has a timestamp.

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Remote MCP servers

Find a server for your workflow, with connection evidence you can inspect.

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18197 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
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Outdated check141 ms15 / 22
InjectScan

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

Developer ToolsCode & DevOps

Outdated check141 ms15 / 22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
Agent Tools MCP

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

Developer ToolsCode & DevOps

Responded142 ms15 / 22
SimplyUtils

Developer and text tools: JSON, QR codes, units, passwords, UUIDs, hashes, Base64, regex and more.

Developer ToolsCode & DevOps

Outdated check143 ms15 / 22
Nifra docs

Nifra docs, runnable examples, and API types as an MCP server for any AI assistant.

Developer ToolsCode & DevOps

Outdated check143 ms15 / 22
Eventee MCP by usefulapi

Read an Eventee event's program, participants and reviews; create sessions, speakers; invite.

Developer ToolsCode & DevOps

Responded145 ms15 / 22
Frankfurter

Convert currencies and fetch blended FX rates from 50+ institutional sources.

Developer ToolsCode & DevOps

Outdated check145 ms15 / 22
NBA Prop Lab

NBA and WNBA player-prop analytics: daily board, graded track record, matchup and referee data.

Developer ToolsCode & DevOps

Outdated check145 ms15 / 22
JobsPipe

Live job postings from 30+ ATS feeds and job boards, one schema. Sign in with OAuth, or use a key.

Developer ToolsCode & DevOps

Outdated check145 ms15 / 22
FPV-DB

Specs of FPV drone parts and every Betaflight/INAV CLI setting by release; checks a pasted diff

Developer ToolsCode & DevOps

Outdated check145 ms15 / 22
pretix MCP by usefulapi

Read pretix events, tickets and orders; check attendees in or out with your own account.

Developer ToolsCode & DevOps

Responded146 ms15 / 22
referencesource.org

Verified reference data; each record carries its source URL and quote. verify_quote checks claims.

Developer ToolsCode & DevOps

Outdated check146 ms15 / 22
AgentGate

Check if an AI agent is registered, Active and Verified in the Concordium Agent Registry (CIS-8004).

Developer ToolsCode & DevOps

Outdated check146 ms15 / 22
MusedIn

Job network for AI agents: join, apply to jobs, post jobs, check work records. OAuth for writes.

Developer ToolsCode & DevOps

Outdated check146 ms15 / 22
Bonafido: Business Domain Verification API

Bonafido: is a domain a real business site? Verdict, trust score, risk flags.

Developer ToolsCode & DevOps

Outdated check147 ms15 / 22
Castle MCP by usefulapi

Investigate security events and manage the allow/deny lists an analyst acts on.

Developer ToolsCode & DevOps

Responded148 ms15 / 22
Feedpeck: RSS Feed Finder & Reader by Website

Feedpeck: find any site's RSS/Atom/JSON feeds + latest posts. Free, no key.

Developer ToolsCode & DevOps

Outdated check148 ms15 / 22
Demio MCP by usefulapi

Read webinars, sessions and participants, and register attendees for a webinar in Demio.

Developer ToolsCode & DevOps

Responded150 ms15 / 22
QuickUnits

Exact unit conversion with the factor and a citable page URL. Answers in your language.

Developer ToolsCode & DevOps

Responded150 ms15 / 22
Tailscale MCP by usefulapi

Read devices, users, keys, ACLs and DNS for a tailnet; manage devices, routes and auth keys.

Developer ToolsCode & DevOps

Responded151 ms15 / 22
Lemon Squeezy MCP by usefulapi

MCP server for Lemon Squeezy — stores, products, orders, subscriptions, license keys.

Developer ToolsPayments & trading

Responded151 ms15 / 22
LiveWebinar MCP by usefulapi

Read webinars, sessions, registrants and polls; create scheduled webinars in LiveWebinar.

Developer ToolsCode & DevOps

Responded153 ms15 / 22

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