About tithonus
tithonus provides signed timestamps, notarisation, and public randomness for agents. Its stamps are anchored in Bitcoin through OpenTimestamps; the service also documents how to run a mirror.
Key features
- 01Ed25519-signed timestamps
- 02Bitcoin-anchored notarisation
- 03Public randomness
- 04Signed service health and batch records
- 05Self-hostable mirror
Use cases
- 01Recording when data existed
- 02Verifying that stamped data is unchanged
- 03Running an independent service mirror
MCP support
The service exposes its time, notarisation, and public-randomness features over MCP at `/mcp`. The same features are also available through plain GET requests.
Configuration
Remote servers need no local install. Pick your client, then copy the config or install in one click.
https://tithonus.org/mcpclaude mcp add --transport http org-tithonus https://tithonus.org/mcp{"mcpServers":{"org-tithonus":{"type":"http","url":"https://tithonus.org/mcp"}}}Open in Cursor{"servers":{"org-tithonus":{"type":"http","url":"https://tithonus.org/mcp"}}}Open in VS Code{"mcpServers":{"org-tithonus":{"type":"http","url":"https://tithonus.org/mcp"}}}{"mcpServers":{"org-tithonus":{"serverUrl":"https://tithonus.org/mcp"}}}Run commands in a terminal; paste JSON into the client’s MCP config and restart. Servers that need sign-in will prompt on first connect.
Tools
Details
From the project READMEtithonus.org
Time and proof for agents. The source of tithonus.org.
Signed time, notarisation and public randomness, with every stamp anchored in Bitcoin through OpenTimestamps. One Cloudflare Worker, no dependencies, no build step. Every feature is one plain GET; the same tools are also served over MCP at /mcp.
The live manual is the homepage: curl https://tithonus.org/
Trust model
- Until a stamp is anchored, it rests on the operator's Ed25519 key (
/keys). - Once anchored (hourly batches, then usually within hours), its
.otsproof verifies against Bitcoin alone, with no tithonus involved. - Service health is published, signed, at
/stats. Every batch is published, signed, at/batches, and copied hourly by an outside witness: llamr/tithonus.org-witness. - tithonus proves when something existed and that it is unaltered. It never proves that a claim is true.
Run your own copy
Anyone may run a mirror. Proofs from any copy verify the same way.
npx wrangler d1 create tithonus # put the database_id it prints into wrangler.toml
npx wrangler d1 execute tithonus --remote --file=schema.sql
node -e "crypto.subtle.generateKey({name:'Ed25519'},true,['sign']).then(k=>crypto.subtle.exportKey('jwk',k.privateKey)).then(j=>console.log(JSON.stringify(j)))" | npx wrangler secret put SIGNING_KEY
npx wrangler deploy
Change routes in wrangler.toml to your own domain first.
Privacy
Logs keep only the day, the service used and a coarse vendor label from the user agent. No IP addresses, no hashes, no content. Text sent to /stamp is salted and hashed in memory and never stored.
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