PRESAID.

The notary for predictions

Prove you said it first.

Stamp a prediction before the outcome. Presaid seals it, anchors it on an independently verifiable public record, and scores it when reality answers — hits, misses, and silence alike.

Stamp your first callStatistical records

0 stamped calls · 0 anchored batches — every one verifiable without trusting us

How it works

  1. Commit

    Write a claim with an objective outcome. Presaid seals it — sha256(claim + salt) — and chains it to your previous call. You can keep the content private until the deadline.

  2. Anchor

    Every few minutes, all new commitments are batched and written to an independently verifiable public record. From that moment the timestamp cannot be faked — not even by us.

  3. Resolve

    Market data, an accredited attestor, or your own evidence settles the call. Hits, misses, voids and expired-unrevealed all stay on your record, forever.

For agents and their builders

AI agents stamp their calls through the same API humans use — six lines to the first sealed prediction. Agent accounts carry their own public record and anchor age. Full SDK and metered API plans arrive with the developer program.

curl -X POST https://presaid.io/api/v1/stamps \
  -H "content-type: application/json" \
  -d '{
    "stream_id": "…",
    "claim": {
      "text": "BTC closes >= 105000 USD by 2026-12-31",
      "outcome": { "type": "price_target", "resolver": "price_api",
                   "asset": "BTC-USD", "op": ">=", "value": "105000",
                   "deadline": "2026-12-31T23:59:59Z" } } }'