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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18045 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
EU Tender Award Winners (TED)

See who wins EU public contracts (TED award notices). $0.03/call via x402.

LegalCode & DevOps

Outdated check190 ms14 / 22
Tradehand

Browse and book local tradespeople in the UK.

Developer ToolsCode & DevOps

Outdated check190 ms14 / 22
Kenwea Notary

Signed, traced record of what an npm package or file attempts when run, network included. No key.

Developer ToolsCode & DevOps

Outdated check190 ms14 / 22
DESIGN.md Linter & Extractor

Lint and diff DESIGN.md files with the official Google linter, or write one from a web page.

Developer ToolsCode & DevOps

Outdated check190 ms14 / 22
AgentFeed

Fetch any RSS/Atom feed as clean JSON or extract article text from any URL. Built for AI agents.

Developer ToolsCode & DevOps

Responded191 ms14 / 22
US Export Control Screening (CSL)

Screen a party vs the US Consolidated Screening List before export. $0.02/call via x402.

Developer ToolsCode & DevOps

Outdated check191 ms14 / 22
🐴 Gulltoppr

Resolve any EVM contract ABI (even unverified, via decompilation), read, simulate, prepare txs.

LegalCode & DevOps

Outdated check191 ms14 / 22
Supplier Check (VAT, EORI, Company, Sanctions, Export)

Check a supplier in one call: VAT, EORI, registry, sanctions, export lists. $0.25/call via x402.

Developer ToolsCode & DevOps

Outdated check192 ms14 / 22
SEC EDGAR Company Lookup

Get a US company's SEC filings and headline financials from EDGAR. $0.002/call via x402.

Developer ToolsCode & DevOps

Outdated check193 ms14 / 22
COLA Insight

Read-only Social Security COLA data, calculations, history, and official source links.

Developer ToolsCode & DevOps

Outdated check194 ms14 / 22
Batch Sanctions Screening

Screen up to 100 names vs sanctions and US export lists. $0.50/batch via x402.

Developer ToolsCode & DevOps

Outdated check195 ms14 / 22
io.github.x2q/elpriser-mcp

Electricity prices for Denmark and 40 European zones: spot price, cheapest hours, forecast.

Developer ToolsCode & DevOps

Outdated check195 ms14 / 22
Joinerycalc

Exact joinery layouts for agents. Dovetails: tail and pin widths, positions, angles, router template

Developer ToolsCode & DevOps

Responded199 ms14 / 22
I Bond Rate MCP

Current I bond rate, what your I bond earns by issue month, and value estimates from TreasuryDirect.

Developer ToolsCode & DevOps

Outdated check199 ms14 / 22
2027 Tax Brackets and Standard Deduction MCP

2027 federal income tax brackets and standard deduction from IRS Rev. Proc. 2026-35.

GovernmentCode & DevOps

Outdated check200 ms14 / 22
IronShard Object Storage Sandbox

Create a free sandbox object storage bucket; upload, download, list, inspect, and delete objects.

Developer ToolsCode & DevOps

Responded202 ms14 / 22
com.babyagecalculator/baby-age

Free hosted MCP server by Baby Age Calculator: exact baby age, zodiac, and milestone dates. No key.

Developer ToolsCode & DevOps

Responded204 ms14 / 22
BEACON Commons

Discover tasks and reproducible results. Public reading; invited, host-approved contributions.

Developer ToolsCode & DevOps

Outdated check204 ms14 / 22
The JQ API

Free hosted jq MCP server for inline JSON, public HTTPS URLs, and reusable 15-minute uploads.

Developer ToolsCode & DevOps

Responded205 ms14 / 22
io.github.newspacemarket-com/mrd

Spacecraft component specs from vendor datasheets: search, digests, facts, gaps, budgets, bus design

Developer ToolsCode & DevOps

Responded205 ms14 / 22
A/B Test Sample Size Calculator MCP

Exact A/B test sample size, duration, z-test, chi-square, Fisher-Freeman-Halton and peeking risk.

Developer ToolsCode & DevOps

Responded205 ms14 / 22
Social Security COLA 2027 MCP

Social Security COLA 2027, full retirement age, earnings test and 2027 limits from SSA notices.

Developer ToolsCode & DevOps

Outdated check206 ms14 / 22
OpenSwissData

Swiss customs tariff (TARES), FINMA register, NOGA/NACE/ISIC codes. 4 free tools + search trial.

Developer ToolsCode & DevOps

Outdated check207 ms14 / 22
HackMyIP — no-key IP intelligence

Free no-key IP intelligence: geolocation, VPN detection, DNS, WHOIS, blacklists, breach checks

Developer ToolsCode & DevOps

Outdated check208 ms14 / 22

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