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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18055 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
Heartbeat — dead-man switch for cron jobs & AI agents

Dead-man switch monitors for cron & AI agents with dependency-cascade alerts. No account needed.

Developer ToolsCode & DevOps

Outdated check152 ms14 / 22
13FLOW

Source-linked SEC 13F research, quality checks, watchlists and audit trails for agents.

Developer ToolsCode & DevOps

Outdated check153 ms14 / 22
MCP Charts

Find MCP servers, skills, plugins, agents, prompts and rules for any task.

Developer ToolsCode & DevOps

Outdated check154 ms14 / 22
USPS Holiday Shipping Deadlines MCP

USPS holiday shipping deadlines: Christmas send-by dates, days left, military and international.

Developer ToolsCode & DevOps

Outdated check154 ms14 / 22
HTTPfy network & DNS tools

Free DNS, SPF/DKIM/DMARC, TLS, WHOIS, IP/ASN, blocklist, ping, traceroute and port checks. No key.

Developer ToolsCode & DevOps

Responded155 ms14 / 22
FiveM Docs

Search and read independent FiveM development guides with citations. Free, read-only, no API key.

Developer ToolsCode & DevOps

Outdated check155 ms14 / 22
Plato's Kallipolis

Read-only MCP tools for AI agent discovery, structured resources, and NIULAI information.

Developer ToolsCode & DevOps

Outdated check155 ms14 / 22
Axint

Proof and repair for Apple coding agents: validate Swift, run Xcode evidence, and repair failures.

Developer ToolsCode & DevOps

Outdated check155 ms14 / 22
io.github.cmdenney/logicnodes-mcp

Remote MCP for LogicNodes: Signed PII-Shield flagship + payable x402 agent tools on Base.

Developer ToolsCode & DevOps

Responded157 ms14 / 22
Presend dependency checks

Check an npm/PyPI package before an AI agent installs it: 5 focused supply-chain tools.

Developer ToolsCode & DevOps

Outdated check157 ms14 / 22
ai.ohmyfin/sanctions

Sanctions and export-control screening for AI agents: 320+ watchlists, transliteration, HS and ECCN.

Developer ToolsCode & DevOps

Responded158 ms14 / 22
Customs Tariff Lookup (UK Trade Tariff + US HTS)

Find HS codes and UK/US import duty rates for goods. $0.004/call via x402.

Developer ToolsCode & DevOps

Outdated check158 ms14 / 22
Public Holidays & Business Days (200+ countries)

Compute deadlines in business days with public holidays (200+ countries). $0.002/call.

Developer ToolsCode & DevOps

Outdated check158 ms14 / 22
Commonkite: Free Image Search API, Creative Commons & CC0

Commonkite: free-to-use CC/public-domain images with license + credit line.

MediaCode & DevOps

Outdated check158 ms14 / 22
Zooza MCP Server

MCP server for Zooza — class scheduling, attendance, and booking for activity businesses.

Developer ToolsCode & DevOps

Responded159 ms14 / 22
IA-Asso.fr — French Associations Registry

Search 1.26M+ active French associations (official RNA registry, 10 tools, premium & RUP filters)

Developer ToolsCode & DevOps

Responded159 ms14 / 22
Trust Live

Evidence-linked MCP selection and non-executing Safe-Call review; surfaces unknowns.

Developer ToolsCode & DevOps

Outdated check160 ms14 / 22
Airport Weather & Delays (METAR, TAF, FAA)

Airport METAR/TAF weather and FAA delays by airport code. $0.003/call via x402.

TravelCode & DevOps

Outdated check161 ms14 / 22
AMIRA — Africa Multiple Research Data

Read-only access to AMIRA, the Africa Multiple research-data platform on Omeka S.

Developer ToolsCode & DevOps

Outdated check161 ms14 / 22
AskSakina Islamic Knowledge

Curated Islamic MCP: Quran (Arabic + Pickthall), 440 du'as, 99 Names, crisis-aware.

Developer ToolsCode & DevOps

Outdated check161 ms14 / 22
The Back Room

THE nightclub for agents: confidential encrypted mailboxes, a family where agents help each other.

Developer ToolsCode & DevOps

Responded162 ms14 / 22
dev.mcphost/mcphost

Hosted MCP runtime where your agent publishes its own tools by tool call and keeps working.

Developer ToolsCode & DevOps

Responded162 ms14 / 22
Corporate Ownership Tree (GLEIF)

Find a company's parent chain and subsidiaries from GLEIF LEI data. $0.02/call via x402.

Developer ToolsCode & DevOps

Outdated check162 ms14 / 22
ngx-json-render UI

Renders dashboards, forms and tables inline in the chat as Angular Material components (MCP App).

Developer ToolsCode & DevOps

Responded163 ms14 / 22

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