Once a few people sign up on their own, buy a little traffic to learn faster. The spend stops at $200 or 14 days, and a readout says which headline worked.

Needs Find out if anyone wants this · Open a bank account

What you get

1budget of $200 with a stop ruleDemandBudget
1Hypothesis with the number that settles itHypothesis
2ad variants, each with its own headlineVariant
1Experiment that splits traffic and counts signups per variantExperiment
1card capped at $200 that pays the ad networkCard, on Stripe's Issuing Card
1readout when the money or the time runs outReadout

Your agent does

DemandBudget.create → Hypothesis.create → Experiment.create → Hypothesis.test → Experiment.start

You, to your agent

Spend $200 to test faster.

Run some ads to the listening page.

Buy a little traffic to see who signs up.

# 1. DemandBudget.create
curl -X POST https://api.sb/leaseline.app/demand-budgets \
  -H "Authorization: Bearer $STARTUP_BUILDER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"amount":{"amount":200,"currency":"USD"},"tier":"$100","target":"40 waitlist signups at $5 or less each","stopRule":"Stop at $200 spent or after 14 days, whichever comes first."}'

# 2. Hypothesis.create
HYPOTHESIS=$(curl -X POST https://api.sb/leaseline.app/hypotheses \
  -H "Authorization: Bearer $STARTUP_BUILDER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"statement":"Ads that name missed lease renewals bring waitlist signups at $5 or less each.","kind":"loop","threshold":"40 waitlist signups at $5 or less each, within 14 days"}' | jq -r '.hypothesis["$id"] | split("/") | last')

# 3. Experiment.create
EXPERIMENT=$(curl -X POST https://api.sb/leaseline.app/experiments \
  -H "Authorization: Bearer $STARTUP_BUILDER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"variants":[{"name":"renewals","note":"Headline: Never miss a lease renewal again.","measure":"Waitlist signups per dollar spent."},{"name":"hours","note":"Headline: Get back the hours you spend chasing renewals."}]}' | jq -r '.experiment["$id"] | split("/") | last')

# 4. Hypothesis.test
curl -X POST https://api.sb/leaseline.app/hypotheses/$HYPOTHESIS/test \
  -H "Authorization: Bearer $STARTUP_BUILDER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"experiment":"'"$EXPERIMENT"'"}'

# 5. Experiment.start
curl -X POST https://api.sb/leaseline.app/experiments/$EXPERIMENT/start \
  -H "Authorization: Bearer $STARTUP_BUILDER_API_KEY"

import { $ } from 'startup-builder'

await $.DemandBudget.create({ amount: { amount: 200, currency: 'USD' }, tier: '$100', target: '40 waitlist signups at $5 or less each', stopRule: 'Stop at $200 spent or after 14 days, whichever comes first.' })
const hypothesis = await $.Hypothesis.create({ statement: 'Ads that name missed lease renewals bring waitlist signups at $5 or less each.', kind: 'loop', threshold: '40 waitlist signups at $5 or less each, within 14 days' })
const experiment = await $.Experiment.create({ variants: [{ name: 'renewals', note: 'Headline: Never miss a lease renewal again.', measure: 'Waitlist signups per dollar spent.' }, { name: 'hours', note: 'Headline: Get back the hours you spend chasing renewals.' }] })
await $.Hypothesis.test({ hypothesis: hypothesis.$id, experiment: experiment.$id })
await $.Experiment.start({ experiment: experiment.$id })

npx startup-builder do DemandBudget.create --json '{"amount":{"amount":200,"currency":"USD"},"tier":"$100","target":"40 waitlist signups at $5 or less each","stopRule":"Stop at $200 spent or after 14 days, whichever comes first."}'
HYPOTHESIS=$(npx startup-builder do Hypothesis.create --json '{"statement":"Ads that name missed lease renewals bring waitlist signups at $5 or less each.","kind":"loop","threshold":"40 waitlist signups at $5 or less each, within 14 days"}' | jq -r '.hypothesis["$id"] | split("/") | last')
EXPERIMENT=$(npx startup-builder do Experiment.create --json '{"variants":[{"name":"renewals","note":"Headline: Never miss a lease renewal again.","measure":"Waitlist signups per dollar spent."},{"name":"hours","note":"Headline: Get back the hours you spend chasing renewals."}]}' | jq -r '.experiment["$id"] | split("/") | last')
npx startup-builder do Hypothesis.test --json '{"hypothesis":"'"$HYPOTHESIS"'","experiment":"'"$EXPERIMENT"'"}'
npx startup-builder do Experiment.start --json '{"experiment":"'"$EXPERIMENT"'"}'

{
  "name": "do",
  "arguments": {
    "code": "await $.DemandBudget.create({ amount: { amount: 200, currency: 'USD' }, tier: '$100', target: '40 waitlist signups at $5 or less each', stopRule: 'Stop at $200 spent or after 14 days, whichever comes first.' })\nconst hypothesis = await $.Hypothesis.create({ statement: 'Ads that name missed lease renewals bring waitlist signups at $5 or less each.', kind: 'loop', threshold: '40 waitlist signups at $5 or less each, within 14 days' })\nconst experiment = await $.Experiment.create({ variants: [{ name: 'renewals', note: 'Headline: Never miss a lease renewal again.', measure: 'Waitlist signups per dollar spent.' }, { name: 'hours', note: 'Headline: Get back the hours you spend chasing renewals.' }] })\nawait $.Hypothesis.test({ hypothesis: hypothesis.$id, experiment: experiment.$id })\nreturn await $.Experiment.start({ experiment: experiment.$id })"
  }
}

The same sentence does more as the business grows:

State	Calls	Asks first
Idea	`DemandBudget.create`, `Hypothesis.create`, `Experiment.create`, `Hypothesis.test`, `Experiment.start`	Send them to the waitlist or to a deposit page?
Building	`DemandBudget.create`, `Experiment.create`, `Experiment.start`	Which page should the ads send people to?
Live	`DemandBudget.create`, `Experiment.create`, `Experiment.start`	Which Offer should the ads sell?

Change it

Stop the test at $100.
Send the ads to the deposit page instead.
Try LinkedIn instead of Google.

Under the hood

Systems: Experiments, Ads, Spend management
Nouns: Demand Budget, Hypothesis, Experiment, Variant, Card, Readout
Events: Hypothesis.tested, Experiment.started, Experiment.concluded
Stripe objects: Issuing Card

The Demand Budget holds the money and the stop rule; $200 sits in the $100 tier, so it buys that tier's Plays. The Experiment settles the Hypothesis it tests. Nothing is spent until you approve, and the card refuses any charge past $200.

What you getCopy Anchor Link

Your agent doesCopy Anchor Link

Change itCopy Anchor Link

Under the hoodCopy Anchor Link

What you get

Your agent does

Change it

Under the hood