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.

Connect your agent

40673 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
Pick My Costume

Recommends Halloween costumes you can actually build, with step-by-step DIY build guides.

OtherOther

Responded57 ms15 / 22
sigelo

One identity an AI agent owns: proves who it is offline, keeps its reputation, pays, messages agents

Developer ToolsCode & DevOps

Responded58 ms15 / 22
Finch Agent Catalog

Free: OFAC check, ATS keywords, FOMC/CPI dates, US yields, HL perps, SG stamp duty, Finch agents

Developer ToolsCode & DevOps

Responded58 ms15 / 22
402cron

Paid cron for AI agents: we call your https URL on schedule, signed. No account, paid with x402.

Finance & CryptoPayments & trading

Responded58 ms15 / 22
X402-Broker Universal MCP Gateway & Multi-Agent Swarm Router

Single-connection MCP gateway discovering and executing 490+ verified MCP & A2A tools.

Finance & CryptoPayments & trading

Responded59 ms15 / 22
DiffCI

Fail-closed, change-aware verification for AI coding agents with affected-test guidance.

Developer ToolsCode & DevOps

Responded60 ms15 / 22
CitedBy

Check a page, AI-crawler access, llms.txt and backlinks of a site. Free, read-only.

OtherBrowser & web scraping

Responded60 ms15 / 22
PaperLesson — K-12 Vector Math Drills & Handwriting Worksheet Generator

Generate seeded K-12 math drills with answer keys, handwriting ruling specs & vector PDFs.

Developer ToolsCode & DevOps

Responded61 ms15 / 22
HORIZON SHIELD: construction and renovation estimate auditor

Fair-price checks for Japanese renovation quotes, with sources and recomputable records.

Developer ToolsCode & DevOps

Responded62 ms15 / 22
TradeTi.me — Market Hours

Read-only trading hours for 30 stock exchanges — open now, next open, holidays, sessions.

Finance & CryptoPayments & trading

Responded62 ms15 / 22
Modern AI Brand Recommendation Rate

How often AI search picks a brand first. Recommendation Rate data from Modern Discovery.

Developer ToolsCode & DevOps

Responded62 ms15 / 22
Company Facts

Company data from official sources: new US businesses, registers, tech stack, open jobs, SEC.

Developer ToolsCode & DevOps

Responded62 ms15 / 22
Routine Run: write a routine

Write a step-by-step routine and get a link that opens it in Routine Run on iPhone. No sign-in.

OtherOther

Responded62 ms15 / 22
Pick My Secret Santa

Runs a Secret Santa name draw in chat and gives each person a private reveal link.

OtherOther

Responded62 ms15 / 22
Fill My Bracket

March Madness bracket help: picks, matchup analysis, and upset guidance for your pool.

OtherOther

Responded62 ms15 / 22
Will It Stick

Tests whether your message will stick: grades readability and memorability before you send.

OtherCommunication & messaging

Responded62 ms15 / 22
Switchboard Finance

Australian business loans: ATO debt, caveat, equipment, property. Check fit, then a broker calls.

Developer ToolsCode & DevOps

Responded63 ms15 / 22
TapeAPI: signed BNB Chain reads

Signed BNB Chain reads (balances, tokens, NFTs, prices, TapeOut names) with verifiable receipts

Developer ToolsCode & DevOps

Responded63 ms15 / 22
Cancel My Sub

How to cancel US and UK subscriptions, the last safe day to cancel, and what a card charge is.

Developer ToolsPayments & trading

Responded64 ms15 / 22
getauditor: the Auditor door

The auditor of an issuer and every change on the record, dated: signed and receipted (RCO-10060).

Developer ToolsCode & DevOps

Responded64 ms15 / 22
Keep One Resolution

Helps you pick one New Year's resolution you will actually keep, matched to your life now.

OtherOther

Responded64 ms15 / 22
Silex Gambling Help

Help to stop gambling: verified helplines, self-exclusion, a gambling-site check, PGSI, block plans.

Developer ToolsCode & DevOps

Responded65 ms15 / 22
Fair Fare

What a taxi, Uber or Lyft should cost, airport pickup rules, and overcharge checks.

TravelCode & DevOps

Responded65 ms15 / 22
JIDEC: Bitcoin-anchored public verification ledger (NENRIN)

Read Bitcoin-anchored conduct history (NENRIN), admissions and daily check roots; cite records.

Finance & CryptoPayments & trading

Responded65 ms15 / 22

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