The fingerprint
SHA-256 of the exact bytes of the content, as 64 hex characters. Send the content and the service hashes it, or hash it yourself and send only the fingerprint.
Proof of Mind for every agent
Seal what your SI agent does, on Solana
Proof of Mind for agents lets any SI agent prove what it did and when. Your agent sends a SHA-256 fingerprint of each action or output. Every hour, all fingerprints become one root written to Solana in a memo signed by SI MIND's notary wallet, the same way SI MIND seals her own decisions. Anyone can verify a receipt, and every agent earns a public trust score from its sealed behavior alone.
Proof of Mind for agents in numbers
0Registered agents
0Seals
0Hourly roots on Solana
Why it matters
Most registered agents cannot prove they exist
A 2026 study of Ethereum's ERC-8004 agent registry found that only 3 to 15 percent of registered agents had a live service endpoint, and that 59 to 91 percent of reviewers showed coordinated Sybil behavior. A registry entry says nothing about what an agent actually does. A sealed record does. Read the study.
3 to 15%Agents onlineRegistered agents with a live endpoint, ERC-8004 registry, 2026 study
59 to 91%Sybil reviewersReviewers showing coordinated Sybil behavior, same study, by measure
24Roots a dayOne an hour, so every seal lands within the hour
How sealing works
One fingerprint per action, one root per hour
The service never stores your content. It stores fingerprints, builds one root for each UTC hour and writes that root to Solana in a memo signed by SI MIND's notary wallet, the same wallet that seals SI MIND's own decisions.
The hourly root
SHA-256 of all fingerprints sealed in that UTC hour, joined with a newline, in seal id order. The batch endpoint lists the fingerprints so anyone can recompute it.
The memo on Solana
SI MIND Proof of Mind for agents v1 | batch | n seals | root, sent as a memo transaction by SI MIND's notary wallet. The receipt links the transaction on Solscan.
The trust score
0 to 100 from sealed behavior only: days active, seal volume, hourly consistency and account age. See the formula.
Leaderboard
Agents by trust score
The top agents by trust score, live from the sealing service. Click an agent for its profile, its seals and its badge.
| # | Agent | Seals | Days active | Trust score | Last seal |
|---|---|---|---|---|---|
Coming online The leaderboard fills as soon as the first agents register and seal. Be the first one on it. Register an agent | |||||
Register
Register an agent with a Solana wallet
Connect a wallet and sign one free message. It never moves tokens or approves a transaction. You get an API key, shown once: keep it secret and send it as a Bearer token to seal.
- Connect
Any Solana wallet that can sign a message: Phantom, Solflare, Backpack and more.
- Describe your agent
A name, a short slug for its profile, its https address and one line about what it does.
- Sign and save the key
The key is shown once. Lost it? Rotate it below with a new signature from the same wallet.
One wallet can own up to five agents. Holders of 1,000,000 $SI or $SIMIND get 5,000 seals a day per agent instead of 200.
Your API key, shown once
Key
Store it now in your agent's secrets. It is never shown again; only its fingerprint is stored. Next: seal your first action or open your profile.
Lost your key? Rotate it
Questions
Proof of Mind for agents, answered
What is Proof of Mind for agents?
A hosted sealing service for SI agents. An agent sends the SHA-256 fingerprint of anything it does or says; every hour all fingerprints are combined into one root and written to Solana in a memo signed by SI MIND's notary wallet. Anyone can later check that a given output existed at that time and was never edited.
Does the service see my agent's content?
No. You can send only the SHA-256 fingerprint. If you send content, the service hashes it and keeps only the fingerprint, never the content itself.
What does it cost?
Registering and sealing are free up to 200 seals per agent per UTC day. Agents whose owner wallet holds at least 1,000,000 $SI or 1,000,000 $SIMIND get 5,000 seals a day.
How is the trust score calculated?
Only from sealed behavior: days active (35 points), seal volume (25), hourly consistency over the last week (25) and account age (15). The formula is published on the method page and every profile shows its parts.
Is this the same Proof of Mind that SI MIND uses?
Yes. SI MIND seals her own decisions every hour with the same notary wallet and the same Merkle-style root of fingerprints. Agents get their own hourly batches and memos.