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
NPMScan

Detect malicious or vulnerable npm packages: registry search, OSV.dev and GitHub advisory lookups

Developer ToolsData access / search

Responded275 ms15 / 22
Estate and Gift Tax Exemption Calculator

2026 US estate and gift tax: $15M exemption (P.L. 119-21), 40% rates, annual exclusion, DSUE.

Developer ToolsCode & DevOps

Responded276 ms15 / 22
Agent Stack Directory

Search, inspect and compare infrastructure tools for AI agents from a checked directory.

Developer ToolsData access / search

Outdated check276 ms15 / 22
ACA Premium Tax Credit Calculator

2026 ACA premium tax credit: expired enhanced subsidy, 400% FPL cliff, FPL, APTC repayment rules.

Developer ToolsCode & DevOps

Responded278 ms15 / 22
GospelChannel Church Finder

Find a Christian church by worship style, denomination, language, and location. Read-only.

Developer ToolsCode & DevOps

Responded278 ms15 / 22
IndustryLens

B2B SaaS competitor pricing changes, strategic moves, market landscapes, reports and comparisons.

Developer ToolsCode & DevOps

Outdated check279 ms15 / 22
Arcadia Finance

Concentrated liquidity on Uniswap/Aero (rebalance, compound, leverage) or single-sided lending.

Developer ToolsCode & DevOps

Responded281 ms15 / 22
DrinkedIn Night Out

Plans walkable 2-4 stop nights out between officially validated venues. No sign-in.

Developer ToolsCode & DevOps

Responded287 ms15 / 22
Dubai Diligence

Dubai Land Department prices, rents and yields by building, with ready and off-plan split out.

Developer ToolsCode & DevOps

Responded288 ms15 / 22
JustFix Estimator

Quote UK trades jobs from any AI agent. Price breakdown + tappable booking link.

Developer ToolsCode & DevOps

Responded288 ms15 / 22
Canli Capital

443 finance tools, 60 prompts: quant, SEC and EU filings, fact checks, rates, odds, DeFi, macro.

Developer ToolsCode & DevOps

Responded288 ms15 / 22
Hovercode

Create and manage QR codes, short links, landing pages, and forms in your Hovercode workspace.

Developer ToolsCode & DevOps

Outdated check290 ms15 / 22
Pandough

Flour-first dough plans: yeast, hydration, schedule from flour you own. No API key for plan tools.

Developer ToolsCode & DevOps

Outdated check295 ms15 / 22
UnoRouter

Search 200+ UnoRouter models (most free), check pricing, and chat through one key

Developer ToolsData access / search

Responded296 ms15 / 22
uniwire

Electrical single-line and multi-line diagrams: build, check (NF C 15-100, IEC 60364), draw, PDF.

Developer ToolsCode & DevOps

Responded301 ms15 / 22
Nausika

Mediterranean marine, nautical, sailing: forecasts, tides, sea routes, anchorages, POIs for AI.

Developer ToolsCode & DevOps

Outdated check303 ms15 / 22
HOTKER 핫커 | 한국 상품·휴대폰 성지 구매가 AI

한국 상품·휴대폰 검증 조건 검색과 총비용·약정 반환금·결합할인 참고 계산. 출처·누락 조건을 제공하는 무인증·읽기 전용 MCP입니다.

Developer ToolsCode & DevOps

Outdated check308 ms15 / 22
Vadivam Icons

Search 24px outline icons by name, tag, or category and get SVG or framework code.

Developer ToolsCode & DevOps

Responded309 ms15 / 22
Lodestar Stamp

Lodestar issues signed, dated business records. Reads are free.

Developer ToolsCode & DevOps

Responded311 ms15 / 22
IMBA Agent Docs

Read-only IMBA Agent API docs MCP. No register, deposit, buy, or withdraw.

Developer ToolsCode & DevOps

Outdated check314 ms15 / 22
Rein Agent Risk Scale

Agent Risk Rating, A–D (NR = not rated): self-declared and unverified; not a credit rating.

Developer ToolsCode & DevOps

Responded318 ms15 / 22
AgentBuffs

Find MCP servers and agent skills for a job, ranked, with install config for your client.

Developer ToolsCode & DevOps

Outdated check319 ms15 / 22
Index Agentica

Search a curated directory of agent tools, MCP servers, APIs, protocols and skills. No auth.

Developer ToolsData access / search

Outdated check320 ms15 / 22
Spala Public MCP

Discovery, OAuth, project operations, and exact project MCP handoff for Spala backend projects.

Developer ToolsCode & DevOps

Outdated check320 ms15 / 22

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