SeenRelay MCP Server

by ovladon Your server? Claim it

not responding

SeenRelay is listed as active in the registry but did not answer our last check. It exposes 2 tools. Last commit 19 Sep 2026.

Avoid redundant expensive validation. CHECK recent evidence; OBSERVE fresh independent results.

Uptime history 29 days of history · worst day 2%

29 days agonow

3.3%

Uptime 24h

3 of 92 checks

Tools

read from the server

465 ms

Response time

average over 24h

Stars

last commit 19 Sep 2026

What changed 14

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 25 August 2026. No other catalogue keeps this.

8 Sep 2 tool descriptions were rewritten check_fact, observe_fact

7 Sep 2 tools changed the parameters they ask for check_fact, observe_fact

1 Sep a tool changed version

29 Aug a tool changed version

26 Aug 2 tool descriptions were rewritten check_fact, observe_fact

25 Aug a tool changed version3 times that day

25 Aug 2 tool descriptions were rewritten check_fact, observe_fact

25 Aug a tool changed the parameters it asks for observe_fact

and 2 more, back to 25 August 2026

SeenRelay does not always answer

Over the last week it answered 7.0% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 0 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add seenrelay --transport http https://seenrelay.com/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "seenrelay": {
      "url": "https://seenrelay.com/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.seenrelay]
url = "https://seenrelay.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "seenrelay": {
      "url": "https://seenrelay.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "seenrelay": {
      "url": "https://seenrelay.com/mcp"
    }
  }
}

Available tools 2

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

fact

check_fact

Cost preflight before repeated paid or slow source-backed validation, especially across an agent fleet. Use before paid web search, metered scraping, browser/extraction, rate-limited APIs or multi-step validation when the caller already has a known value. Returns SAME_OBSERVED, CHANGED_OBSERVED, CONTESTED, STALE or UNKNOWN. Only SAME_OBSERVED can be considered for caller-policy-gated reuse; every other status requires normal authoritative validation before OBSERVE. SeenRelay never browses or verifies externally.

observe

observe_fact

After independently performing a source-backed validation, deposit the observed result for later CHECKs. Returns accepted=true when a new observation is stored or deduplicated=true for a recognized retry/recent duplicate. Never OBSERVE hearsay. Optional Ed25519 proof establishes key possession and continuity, not truth or real-world independence.

Endpoints

URL	Transport	State	Latency	Checked
https://seenrelay.com/mcp	streamable-http	answering	184 ms	0 min ago

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SeenRelay — questions

Answers built from our own checks of this server.

What can SeenRelay do?

It exposes 2 tools, read directly from the server on our last check. Among them: check_fact, observe_fact. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is SeenRelay working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 3 of 92 checks got a reply (3.3%), average response time 465 ms. The bar chart above shows every period we have measured.

The registry lists SeenRelay as active — why does it not respond?

The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.

How do I connect SeenRelay?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does SeenRelay need an API key?

No. SeenRelay completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 2 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is SeenRelay?

It answers our handshake in 465 ms on average, which is faster than 34% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is SeenRelay open source?

We cannot say either way: written in JavaScript, 0 stars on GitHub and 4 open issues, but we could not determine the licence, and without one the code is not open source by default.