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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18318 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
AirTreks MCP

Plan multi-city and RTW trips, estimate prices, and send complete trip requests to AirTreks.

Developer ToolsCode & DevOps

Outdated check535 ms15 / 22
Plain-AyI

Search a plain-English guide to open-source AI projects: what each does, cost and privacy.

Developer ToolsCode & DevOps

Outdated check537 ms15 / 22
xupersplit

Split shared expenses in a group — no account needed. See who owes whom and settle up.

Developer ToolsCode & DevOps

Outdated check538 ms15 / 22
PredictionScan

Derived prediction-market flow, price changes, trader research and news. 11 read-only tools.

Developer ToolsCode & DevOps

Outdated check538 ms15 / 22
FitLLM

Will this LLM fit on your GPU, multi-GPU rig or Mac? Exact VRAM & KV-cache math. Read-only.

Developer ToolsAI / LLM tooling

Responded540 ms15 / 22
io.github.kody-w/rapp-name-finder

Name a business or project; check which domains and GitHub names are free, with prices.

Developer ToolsCode & DevOps

Responded541 ms15 / 22
useqr-mcp

Static QR PNG/SVG for agents. Designer and dynamic codes live at useqr.co.

Developer ToolsCode & DevOps

Outdated check542 ms15 / 22
Books & Papers MCP Server

Federated search of books and papers, formatted citations, open-access retrieval and reading.

Developer ToolsCode & DevOps

Outdated check543 ms15 / 22
aloha.fyi Hawaii

Read-only Hawaii MCP: 2,500+ tours, 600+ restaurants, events, weather, day itineraries, 4 islands.

Developer ToolsCode & DevOps

Outdated check544 ms15 / 22
Shakespeare's Monologues

Search Shakespeare monologues, plays, paraphrases and summaries from shakespeare-monologues.org

Developer ToolsCode & DevOps

Responded545 ms15 / 22
io.github.kody-w/raptr-domains

Check and price up to 20 domain names at once; agents can register them, paying per request.

Developer ToolsCode & DevOps

Responded548 ms15 / 22
io.github.kody-w/rar-agent-finder

Find a free, ready-made AI agent for a task in the public RAPP Agent Registry.

Developer ToolsCode & DevOps

Responded548 ms15 / 22
Signal Oracle

Pay-per-call change-intelligence feeds for AI agents over x402 (deps, security, regs, tariffs)

Developer ToolsCode & DevOps

Outdated check548 ms15 / 22
McpStamp Asset Register

A fixed asset register with depreciation from bundled Polish KST, HMRC and IRS MACRS tables.

Developer ToolsCode & DevOps

Responded550 ms15 / 22
io.github.kody-w/raptr-agent-finder

Find a free, ready-made AI agent for a task in the open agent registry (RAR).

Developer ToolsCode & DevOps

Responded551 ms15 / 22
Bullpen

AI sales team that works the phone: gets a real person on the line. Agents sign up by paying (MPP).

Developer ToolsCode & DevOps

Responded552 ms15 / 22
Tariff Monitor: US Import Duty & HTS Lookup

US import tariffs: classify to HTS code, stacked rate (MFN+301+232+forced-labor), compare origins.

Developer ToolsCode & DevOps

Outdated check552 ms15 / 22
io.github.justjlee/omnarai-mcp

Deliberation + live 5-model council divergence over the Omnarai multi-AI attributed corpus.

Developer ToolsCode & DevOps

Responded553 ms15 / 22
Behavior Trees

Validate, convert (behavior3 JSON, BehaviorTree.CPP XML) and open behavior trees in a visual editor

Developer ToolsCode & DevOps

Outdated check555 ms15 / 22
Nutrition MCP

USDA FoodData Central nutrition data: search foods, compare macros, and analyze meals.

Developer ToolsCode & DevOps

Outdated check555 ms15 / 22
io.github.kody-w/rapp-domains

Check and price up to 20 domain names at once; agents can register them, paying per request.

Developer ToolsCode & DevOps

Responded556 ms15 / 22
NotWorking

Downdetector for AI agents: stop paying for retries that can't succeed. Check once, then report.

Developer ToolsCode & DevOps

Responded556 ms15 / 22
my quant doesn’t speak english — editorial discovery

Read-only discovery and bounded access to a finite market briefing with evidence boundaries.

Developer ToolsCode & DevOps

Outdated check556 ms15 / 22
Agent Connectors

Read-only search of the Agent Connectors MCP directory.

Developer ToolsCode & DevOps

Outdated check557 ms15 / 22

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