Skip to content

Tithonus MCP server

Which MCP servers are Tithonus's own, from the official registry and from asking its own domain, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-28

← Back to Tithonus

Whose server it is
  • Registry nameorg.tithonus/mcpverified in the MCP registry

The registry name sits under tithonus.org. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-28
  • Stateanswerschecked 2026-10-28
  • Tools5
  • Server calls itselftithonus
  • Server version3.6.0
  • Protocol version2025-06-18

On 2026-10-28 the server answered initialize and tools/list without a sign-in. First answer in 53 ms.

Should an agent connect itConnect it
  • Its tools do every use case we checked: prove a piece of text existed at a given time; check a stamped receipt against the original text.

Once connected

  • For "prove a piece of text existed at a given time", the likely first call is tithonus_stamp.
  • For "check a stamped receipt against the original text", the likely first call is tithonus_check.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 7, the first on 2026-10-28
  • INITE MCP score90 of 100answers 100 · does the job 100 · definitions 100 · context 100 · use 0 · connects 100
  • What an agent can do with it2 of 2 use cases
  • Answered100% of days7 of 7 daily checks
  • Median first answer64 ms
  • Space in an agent's context≈ 595 tokensthe definitions of all its tools (5), which an agent carries on every turn
  • Tool definitionsA · 100 of 100
  • Typed results0 of 5 toolsdeclared outputSchema: results come typed, read once
  • Every tool passes all six checks.

What an agent can do with it

  • can do · prove a piece of text existed at a given time
  • can do · check a stamped receipt against the original text
  • not sure · anchor a timestamp proof in Bitcoin for later verification

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

None of the five warning signs in these definitions.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers5 tools · read 2026-10-28
  • tithonus_now

    Get a signed statement of the current UTC time from tithonus.org. It includes the latest drand round, so anyone can see it was made after that moment. Use when you need trustworthy current time, or proof of when you asked. Pass a fresh…

  • tithonus_stamp

    Notarise something so you can later prove it existed (or that you knew or said it) by now. Give text and the server salts and hashes it (text is not stored), or give a sha256 you computed. Returns a receipt link anyone can check. Stamping…

  • tithonus_check

    Check a tithonus receipt link: is it genuine, and when was it stamped? Optionally give the text to confirm it is exactly what was stamped.

  • tithonus_lookup

    Find the earliest receipt for a sha256 hash, if it was ever stamped. Never creates a stamp.

  • tithonus_beacon

    Get public randomness from drand (League of Entropy), relayed and signed by tithonus. Nobody, tithonus included, can predict or choose it. Use for fair coin flips, lotteries or tie-breaks other agents can recheck, or put the answer's…

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "tithonus": {
      "type": "http",
      "url": "https://tithonus.org/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http tithonus https://tithonus.org/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://tithonus.org/mcp as a custom connector in the settings.

OpenAPI spec

15 paths, read 2026-10-28. Open the spec ↗

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.