For hackathon judges · no signup · about a minute

Every community dollar, linked to proof.

Fieldproof turns a volunteer project's rough plan into budgeted work packages, collects each pledge through PayPal, and repays the people who buy supplies. AI drafts the plan and reads the receipts; a person approves every payment, and every dollar stays linked to its evidence.

Both buttons create your own private Sample workspace. No account, no email, nothing to install. It lasts twelve hours and you can start over at any time.

THE EASTSIDE MAKERSPACEPLAN 01 / REV. 01

PledgedCollectedStill an ideaSelect a space to explore ↗

01—06Six work packages · $8,410↗

FICTIONALSample.EASTSIDE MAKERSPACE

One classroom, three people

The story you are about to see.

Ms. Okafor organizer

Has an empty classroom and a rough sketch. She needs a plan people can fund piece by piece, and a record her school board can trust.

Beat 1 · the sketch becomes a blueprint

A supporter that's you

Pledged $50 to the Electronics benches. Eight pledges make $960; seven collect, one is declined and is recovered by invoice.

Beat 2 · collection and recovery

Maria volunteer

Paid $86.40 for supplies out of pocket. Her receipt is split across two packages, checked for a duplicate, approved and repaid.

Beat 3 · receipt to repayment

What is real here

Every payment on screen says where it came from.

Sample

Fictional data in your workspace. Eastside Middle School, its supporters, Maria's receipt and every amount in the tour are invented. No provider is called and no money moves.

Replay · not available yet

Facts observed from PayPal's sandbox. When one real sandbox run of this round has been recorded, the tour will show its observed states here. Until then nothing in the tour is presented as provider-observed.

Live sandbox

Only what you do yourself. A live sandbox payment exists only after you approve it in PayPal with your own sandbox buyer account. The tour never shows this label. How to try it

Explore by role

Four seats at the same table.

Each link opens your own workspace in that role, on the page where that person starts. You can switch roles at any time; the server checks every action.

How AI uses PayPal

AI proposes. PayPal moves money. A person decides.

No model ever calls a PayPal write. Models read, draft and explain; fixed code and a named person's approval are the only way money moves.

StepAI doesPayPal doesA person decides

PlanReads a sketch and supplier quotes into zones, budgets and proof requirements.Nothing yet. Each package budget later becomes the exact amount of its orders.The organizer reviews every zone before the plan is published.

CollectNothing. Collection is fixed code, not a model.Saved-wallet consent, then one Orders capture per pledge when the goal is reached.Each supporter approves their own exact amount in PayPal.

RecoverNothing. A decline is never retried by a model.One Invoicing invoice with a QR code for the same obligation, inside a 48-hour window.The supporter pays the invoice, or the round is refunded.

RepayReads a receipt into lines, proposes a package for each, flags unclear lines and possible duplicates.A Payout to the volunteer's verified PayPal account (Log in with PayPal).The organizer approves the exact amount, then separately sends it.

ReturnNothing. Shares are computed, not guessed.A refund of the original capture when a package is cancelled.Each supporter chooses a return or another purpose.

ExplainProof Studio's Steward and Auditor answer questions and build reports from the record.Read-only Agent Toolkit calls: one owned order or one owned invoice.The Auditor role is read-only; a payment request from it is refused.

Live sandbox · optional

Bring your own PayPal sandbox buyer.

If you have a PayPal developer account you can make a real sandbox payment with test funds. This runs in a separate live-sandbox workspace, never in the Sample story, and nothing happens until you approve it inside PayPal's own window.

Have a sandbox Personal account ready.In the PayPal Developer Dashboard open Testing Tools → Sandbox Accounts and use (or create) a Personal account. That is your test buyer. Fieldproof never asks for its password; you type it only into PayPal.
Make one $1.00 test payment.Open the sandbox checkout, choose Open your own sandbox workspace, stay in the Donor role, tick the single approval box and pay with your sandbox buyer. Fieldproof records the payment only after PayPal confirms the capture.Open the sandbox checkout
Or save a wallet for a conditional pledge.Choose an exact share of the $960 Electronics benches goal and approve saving your sandbox wallet in PayPal. Saving it charges nothing. Collection only begins once all eight shares are committed and the organizer freezes the round.Open conditional commitments
Follow it into the record.A confirmed payment appears in that workspace as a Live sandbox receipt, never as Sample. Your Sample workspace stays available under Saved workspaces.

Use only your own sandbox account. No sandbox login is published here, and no real currency moves anywhere in this demonstration.