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MCP live MCP 2026-07-28 streamable-http

MCP Observatory: one read only walk over every https endpoint in the official registry

io.github.ogasurfproject-jpg/hs-mcp-observatory

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

Watch this dependency Share evidence report
Uptime
100.0%
5 direct probes · 30d
Response
317ms
last probe
Tools
6
callable
Resources
0
readable
Prompts
0
available
Primary URL
https://observatory.horizonshield.dev/mcp
Score: 100/100
Handshake verified by our own probe.
pass Answers the MCP handshake 50/50
The handshake and the list calls succeeded on the primary URL.
pass Lists tools, resources or prompts 30/30
6 tools, 0 resources, 0 prompts returned.
pass 3 or more catalogue items 10/10
6 items in total; 3 or more earns these points.
pass Describes itself 10/10
98 characters; more than 30 earns these points.

Tools · 6

mcp_observatory_state

What was measured, when, over what population, and what the measurement cannot tell you. Read this before quoting any number from this server.

mcp_observatory_summary

The counts, as published and as corrected. How many addresses answered, how many tools they exposed, how many stated who compensates their operator.

mcp_observatory_lookup

What happened when we contacted one address, or an aggregate for one host. Returns the record hash and the procedure to recompute it. There is no tool here that lists addresses; you must already hold …

mcp_observatory_disclosure_guide

How the 152 servers that stated who compensates their operator actually did it - the field names observed in the wild, with counts. Not a specification we invented.

mcp_observatory_measure_now

Contact one https address now and report what we see: whether it speaks MCP, whether it carries an agent card, and whether that card names who compensates the operator. Read only; no tool is called. r…

mcp_observatory_method

How the walk was run, what we got wrong and corrected, and the four rules the report holds itself to.

How to use

Claude Desktop or claude.ai: add a custom connector (Customize → Connectors; on Team and Enterprise plans an owner adds it under Organization settings → Connectors) with this server URL: https://observatory.horizonshield.dev/mcp

Cursor or Cline: add to your MCP config:

{
  "mcpServers": {
    "mcp_observatory:_one_read_only_walk_over_every_https_endpoint_in_the_official_registry": {
      "url": "https://observatory.horizonshield.dev/mcp",
      "transport": "streamable-http"
    }
  }
}