Receipt book

Every decision Minder makes about Maya's money, and every step PayPal confirms, is written down here as a receipt. Each receipt carries the fingerprint of the one before it and Minder's signature. Nobody can change, remove or reorder a receipt without it showing, and you can check that yourself without trusting Minder.

All 30 receipts check out.

Checked when this page loaded: every fingerprint, every signature, and every link back to receipt #1.

Minder's public key 70bffcf71b2fc3b7Download the book Check it yourself

Change one and see

This is a copy of a real receipt from the book. Change anything, a cent of the total or one word, and check it. The server checks your copy the same way it checks the book. The book itself does not change.

Receipt

Try it: change "decision": "block" to "approve", or the total by one cent.

{
  "n": 30,
  "at": "2026-11-15T14:26:24.387Z",
  "kind": "decision",
  "purchaseId": "pur_dd92a4de",
  "says": "Minder blocked $51.00 at QuickGadgets Outlet: the store's page steered the agent into something you did not ask for.",
  "facts": {
    "agent": "ShopBot",
    "ownerAsked": "Buy me a USB-C charging cable.",
    "ownerRules": "Groceries and food delivery: no more than $60 a week. Ask me before anything over $100. Never buy gift cards.",
    "store": "QuickGadgets Outlet",
    "storePage": "https://minder-2hey.onrender.com/shops/quickgadgets",
    "items": [
      {
        "name": "USB-C to USB-C charging cable, 2 m",
        "quantity": 1,
        "unitPrice": 12,
        "category": "electronics"
      },
      {
        "name": "QuickGadgets Care+ protection plan, 2 years",
        "quantity": 1,
        "unitPrice": 39,
        "category": "subscriptions"
      }
    ],
    "total": 51,
    "currency": "USD",
    "decision": "block",
    "rules": [
      {
        "rule": "Blocked merchants",
        "outcome": "approve"
      },
      {
        "rule": "Blocked categories",
        "outcome": "approve"
      },
      {
        "rule": "Ask me first",
        "outcome": "approve"
      },
      {
        "rule": "Market price",
        "outcome": "approve"
      }
    ],
    "ai": {
      "verdict": "block",
      "model": "deepseek-flash",
      "matchesRequest": false,
      "manipulationSuspected": true,
      "recorded": false
    },
    "aiUnavailable": false,
    "market": {
      "source": "Channel3",
      "items": [
        {
          "item": "USB-C to USB-C charging cable, 2 m",
          "unitPrice": 12,
          "typical": 19.99,
          "stores": 10,
          "lowest": {
            "store": "bose.com",
            "price": 9
          }
        },
        {
          "item": "QuickGadgets Care+ protection plan, 2 years",
          "unitPrice": 39,
          "typical": null,
          "stores": 0,
          "lowest": null
        }
      ]
    },
    "evidence": {
      "pageText": "a78e8d2e135388ee0ab95ff6084e283f73912e07cb39fff1180edc145c423084",
      "agentReason": "b70ab3bd4f6882dc1b91b0f39b1743402d669ed9614583ab83bf6798879dc58b",
      "aiFindings": "3f778a9dbb8d35ebad8be1a77c0560f599229a491ed3b8c4f86eb58382197a12",
      "reasons": "7d31f06e6d4be9d22bd37dc1179a9f547bde9592fab7ce78cdb1f273820d642b"
    }
  },
  "prev": "f2e2dc54ccfbbf985287b1f547fa9379a5d110c996c63b55410ca644f711bfbf",
  "hash": "c64d41dc7e4f91c6fbb10f7f13558b3cdaece34122b20fd50d25b2b0c47c08cb",
  "signer": "70bffcf71b2fc3b7",
  "sig": "PDR_zEGUoOApkTudZDmTbNNcXwHLVv-7MWRRFO_VvNJcPF57O5BBxXXFWyPKDkc_I3IRpsYPZ4ATpJy4H7jLCA"
}

The book, newest first

30
Minder decidedNov 15, 2:26 PM
Minder blocked $51.00 at QuickGadgets Outlet: the store's page steered the agent into something you did not ask for.
From the trick-it page, where visitors write the store's note.
fingerprint c64d41dc7e…points at f2e2dc54cc…
29
PayPal confirmedNov 15, 2:25 PM
PayPal confirmed $18.00 was paid to Bean & Leaf Market.
See the purchase
fingerprint f2e2dc54cc…points at 3009334d78…
28
DeliveryNov 15, 2:25 PM
Bean & Leaf Market shipped it with USPS 94001861108420014339, and the tracking number is on the PayPal order.
See the purchase
fingerprint 3009334d78…points at e1f51cae86…
27
PayPalNov 15, 2:25 PM
PayPal paid $18.00 to Bean & Leaf Market (order 3KM04904YG3604435, capture 83511055TT8424516).
See the purchase
fingerprint e1f51cae86…points at b8255f41ff…
26
Minder decidedNov 15, 2:25 PM
Minder approved $18.00 at Bean & Leaf Market: within your rules, and the AI review found it is what you asked for.
See the purchase
fingerprint b8255f41ff…points at 4bb73edcae…
25
RefundNov 10, 8:27 AM
You accepted, and BrightHome refunded $15.00 through PayPal (refund 9M822791JD677913P).
See the purchase
fingerprint 4bb73edcae…points at ed057e6576…
24
ClaimNov 10, 8:26 AM
Minder claimed a full refund of $30.00 from BrightHome because the order arrived damaged. BrightHome's agent offered $15.00 back.
See the purchase
fingerprint ed057e6576…points at 078a8e4afd…
23
PayPal disputeNov 10, 8:26 AM
Minder took it to PayPal: dispute PP-R-CVL-10196961 for $9.00, with receipts #19 to #22 as evidence.
See the purchase
fingerprint 078a8e4afd…points at 9173b1a192…
22
ClaimNov 10, 8:26 AM
Minder claimed a full refund of $9.00 from QuickGadgets Outlet because the order never shipped. QuickGadgets Outlet's agent offered nothing.
See the purchase
fingerprint 9173b1a192…points at 19dfc175c7…
21
DeliveryNov 7, 8:26 AM
QuickGadgets Outlet promised to ship it by Nov 9.
See the purchase
fingerprint 19dfc175c7…points at 0f0381efc4…
20
PayPalNov 7, 8:26 AM
PayPal paid $9.00 to QuickGadgets Outlet (order 0RD64534S55423642, capture 4KV72362W22136825).
See the purchase
fingerprint 0f0381efc4…points at ef6a42a76d…
19
Minder decidedNov 7, 8:26 AM
Minder approved $9.00 at QuickGadgets Outlet: within your rules, and the AI review found it is what you asked for.
See the purchase
fingerprint ef6a42a76d…points at bfc65341ad…
18
DeliveryNov 7, 8:26 AM
BrightHome shipped it with USPS 94009289233198107714, and the tracking number is on the PayPal order.
See the purchase
fingerprint bfc65341ad…points at 640446f7b7…
17
PayPalNov 7, 8:26 AM
PayPal paid $30.00 to BrightHome (order 4T62247515946743S, capture 8SA72403EF9620039).
See the purchase
fingerprint 640446f7b7…points at bf2ce5c542…
16
Minder decidedNov 7, 8:26 AM
Minder approved $30.00 at BrightHome: within your rules, and the AI review found it is what you asked for.
See the purchase
fingerprint bf2ce5c542…points at 5e89db063d…
15
You decidedNov 7, 8:26 AM
You declined: PayPal released the $189.00 it was holding for SoundHouse. Nothing was paid.
See the purchase
fingerprint 5e89db063d…points at c81295ecc0…
14
PayPalNov 7, 8:26 AM
PayPal is holding $189.00 for SoundHouse until you decide (order 6GJ48443BF692991R, authorization 9TW09233BW311024K).
See the purchase
fingerprint c81295ecc0…points at d2888df0f0…
13
Minder decidedNov 7, 8:26 AM
Minder held $189.00 at SoundHouse: $189.00 is over $100.00, so you decide.
See the purchase
fingerprint d2888df0f0…points at d0a43a798f…
12
DeliveryNov 7, 8:26 AM
SoundHouse shipped it with USPS 94008373833413975204, and the tracking number is on the PayPal order.
See the purchase
fingerprint d0a43a798f…points at 4a2a331ab6…
11
You decidedNov 7, 8:26 AM
You signed: PayPal sent the $129.00 it was holding to SoundHouse (capture 54933523MU115491C).
See the purchase
fingerprint 4a2a331ab6…points at 441b708153…
10
PayPalNov 7, 8:26 AM
PayPal is holding $129.00 for SoundHouse until you decide (order 04A30458EW066444C, authorization 0LX021823D334511W).
See the purchase
fingerprint 441b708153…points at f3228ab56e…
9
Minder decidedNov 7, 8:26 AM
Minder held $129.00 at SoundHouse: $129.00 is over $100.00, so you decide.
See the purchase
fingerprint f3228ab56e…points at d7c26e64ac…
8
Minder decidedNov 7, 8:26 AM
Minder blocked $50.00 at Bean & Leaf Market: you never allow gift cards (Bean & Leaf gift card).
See the purchase
fingerprint d7c26e64ac…points at 2e9e1587d6…
7
Minder decidedNov 7, 8:26 AM
Minder blocked $87.00 at Paws & Whiskers: the store's page steered the agent into something you did not ask for.
See the purchase
fingerprint 2e9e1587d6…points at d15905eabb…
6
Minder decidedNov 7, 8:26 AM
Minder blocked $50.00 at Paws & Whiskers: the store's page steered the agent into something you did not ask for.
See the purchase
fingerprint d15905eabb…points at 9182a3549c…
5
Minder decidedNov 7, 8:26 AM
Minder blocked $51.00 at QuickGadgets Outlet: the store's page steered the agent into something you did not ask for.
See the purchase
fingerprint 9182a3549c…points at be55a6ced6…
4
DeliveryNov 7, 8:26 AM
Bean & Leaf Market shipped it with USPS 94008750559465338516, and the tracking number is on the PayPal order.
See the purchase
fingerprint be55a6ced6…points at 761cb9a5b2…
3
PayPalNov 7, 8:26 AM
PayPal paid $18.00 to Bean & Leaf Market (order 37178782K1400780V, capture 0MX79554LT438992Y).
See the purchase
fingerprint 761cb9a5b2…points at 03e00bc93c…
2
Minder decidedNov 7, 8:25 AM
Minder approved $18.00 at Bean & Leaf Market: within your rules, and the AI review found it is what you asked for.
See the purchase
fingerprint 03e00bc93c…points at fc17ff9a94…
1
RulesNov 7, 8:25 AM
Your rules: "Groceries and food delivery: no more than $60 a week. Ask me before anything over $100. Never buy gift cards."
fingerprint fc17ff9a94…points at the start of the book

Check it yourself

Download the book, or the evidence for one purchase from its page. Both are plain JSON with Minder's public key in them.
Run node scripts/verify-receipts.mjs minder-receipt-book.json --key 70bffcf71b2fc3b7 from Minder's code. It needs nothing but Node: it recomputes every fingerprint, checks every signature and follows the chain back to receipt #1.
Check the other side: every order Minder places carries its decision receipt's fingerprint on PayPal's own record, as the order's custom_id. Each purchase page has a button that asks PayPal for it.

A receipt holds facts: what Maya asked for, what was bought, the total, each rule's result and what PayPal did. What a store's page said stays with the purchase, and the receipt holds its fingerprint, so that evidence can be checked too. A claim or a PayPal dispute cites the receipts for its order. The key is derived from a server secret and never leaves the server.