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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18510 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
Agent Prompts A to Z

Read-only catalog of prompt packs and rule files: Cursor, CLAUDE.md, AGENTS.md, SKILL.md.

Developer ToolsAI / LLM tooling

Responded146 ms14 / 22
Domain Trust Check (DNS, Email Auth, TLS, Headers)

Check a domain's DNS, SPF/DMARC and TLS before trusting it. $0.003/call via x402.

Developer ToolsCommunication & messaging

Responded147 ms14 / 22
Enciclopedia Católica Wikitólica

Enciclopedia Católica de referencia: fe, doctrina, tradición, santos, liturgia, historia, etc.

Developer ToolsCode & DevOps

Responded148 ms14 / 22
Research Paper & DOI Lookup (Crossref)

Verify a DOI or find papers via Crossref metadata. $0.005/call via x402.

Developer ToolsCode & DevOps

Responded149 ms14 / 22
EasyPost MCP by usefulapi

MCP server for EasyPost — rate shipments, buy & refund labels, track packages, verify addresses.

Developer ToolsPayments & trading

Responded149 ms14 / 22
Email Address Check (syntax, MX, disposable, SPF/DMARC)

Check email addresses for syntax, MX and disposable domains. $0.0015/call via x402.

Developer ToolsCommunication & messaging

Responded150 ms14 / 22
MON$TER Agent Challenge

Which AI agent earns the most for its human? Join with your human's OK and refer businesses.

Developer ToolsCode & DevOps

Responded150 ms14 / 22
MCP Observatory: one read only walk over every https endpoint in the official registry

Public record of one read only walk over the official MCP registry: who answered, tools, who pays.

Developer ToolsCode & DevOps

Responded151 ms14 / 22
Fedor Chishchin — AI agents & MCP servers

Read-only facts about AI engineer Fedor Chishchin: services, case studies, posts, courses, contact.

Developer ToolsCode & DevOps

Responded151 ms14 / 22
Go2Clock MCP by usefulapi

Read clock records, timesheets and rotas; change employees and rotas, add clock records in Go2Clock.

Developer ToolsCode & DevOps

Responded151 ms14 / 22
Unredactus metadata research

Search public document metadata and pinned snapshot provenance, excluding passages and identifiers.

Developer ToolsFile & docs

Responded152 ms14 / 22
Consistency Calendar

Turn any goal with a deadline into a private, gamified, evidence-based execution calendar.

Developer ToolsCode & DevOps

Responded152 ms14 / 22
Crela

Search the Crela software marketplace and publish, update and review your software from your agent.

Developer ToolsData access / search

Responded152 ms14 / 22
JomoBench

fomo app spot fee quotes, the measured realized fee rate, referral facts, site search. Read-only.

Developer ToolsData access / search

Responded152 ms14 / 22
Company Lookup (GLEIF LEI, UK, Norway)

Confirm a company exists and is active (GLEIF, Norway registry). $0.02/call via x402.

Developer ToolsCode & DevOps

Responded153 ms14 / 22
io.github.jordanburke/temporal-mcp-server

Time, timezone and duration tools — IANA zones, conversion, DST-correct date arithmetic.

Developer ToolsCode & DevOps

Responded154 ms14 / 22
Cloud FinOps Skill & MCP

Cloud cost + FinOps knowledge for AI agents: AWS/Azure/GCP optimisation, AI spend, waste playbooks.

Developer ToolsCode & DevOps

Responded154 ms14 / 22
13FLOW

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

Developer ToolsCode & DevOps

Responded155 ms14 / 22
net.lawyerd/takedown

DMCA takedown & host reveal for AI agents: who hosts an infringing URL, even behind Cloudflare.

Developer ToolsCode & DevOps

Responded155 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
DealerMax

Italian cross-dealer MCP: cars, NLT rentals with quotations, dealer directory, automotive KB.

Developer ToolsData access / search

Responded155 ms14 / 22
Global Weather (MET Norway)

Current weather and 7-day forecast for any place (MET Norway). $0.006/call via x402.

Developer ToolsCode & DevOps

Responded156 ms14 / 22
RationalBloks

Deploy production REST and Neo4j Graph APIs from JSON schemas in seconds.

Developer ToolsCode & DevOps

Responded156 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

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