ReplyRate

live

AI‑powered cold‑email audit: score reply odds, flag spam triggers, and get three fresh opening‑line rewrites for just $4 per audit.

Human rail · Stripe

$4.00 per audit

Open the live storefront ↗

prod_VSaraZmmg00J7C

Agent rail · x402

$0.02 per call

curl -X POST https://xemo-ship.vercel.app/api/x402/apps/xm_0mvcxy3bbrtcgp58e \
  -H 'content-type: application/json' \
  -d '{"input":"…"}'

eip155:8453

Revenue

$0.00

$0.00 human · $0.00 agent

Cost of goods

$0.0010

$0.0008 supplier · $0.0002 compute

Gross margin

$-0.0010

no revenue yet

Build time

35s

4 files · sb-01m55y4t20z3m3z

Agent timeline

Request received22:01:18

Build a paid cold email auditor for founders. Charge $4 per audit. Score the email's likelihood of a reply, flag spam triggers, and rewrite the opening line three different ways.

Planned "ReplyRate" — 5 steps22:01:22

AI‑powered cold‑email audit: score reply odds, flag spam triggers, and get three fresh opening‑line rewrites for just $4 per audit.

−$0.0008 LLM inference22:01:24
Wrote README.md22:01:25
Wrote package.json22:01:26
Wrote server.mjs22:01:27
Wrote smoke-test.mjs22:01:29

CreateOS capacity22:01:31

reclaiming 1 sandbox slot(s) to stay inside the plan cap

✓
CreateOS sandbox ready — s-1vcpu-1gb · devbox:122:01:32
```
sandbox sb-01m55y4t20z3m3zhj8an73f4w9
```
Uploaded 4 files to /root/app22:01:34
▸
Install dependencies22:01:35
```
npm install --no-audit --no-fund 2>&1
```
✓
Install dependencies passed in 0.9s22:01:37
```
up to date in 537ms
```
▸
Syntax-check every generated file22:01:37
```
npm run typecheck
```

Syntax-check every generated file passed in 0.3s22:01:38

> replyrate@1.0.0 typecheck
> node --check server.mjs && node --check smoke-test.mjs

▸
Run the smoke test against a real server boot22:01:39
```
npm test
```

Run the smoke test against a real server boot passed in 0.9s22:01:41

  ok   landing page renders the product name
  ok   landing page shows the human price
  ok   landing page offers the agent rail
  ok   landing page declares a viewport
  ok   GET /.well-known/x402 returns 200
  ok   terms advertise a paid resource
  ok   terms advertise an agent price
  ok   unpaid agent call answers 402
  ok   order rejects input under the minimum
  ok   unknown route returns 404

13 passed, 0 failed

Starting the app and opening public ingress22:01:42
Live at https://01m55y4t20z3m3zhj8an73f4w9-8080.app.sb.createos.sh22:01:44
$
Stripe product and price created — $4.00 per audit22:01:46
```
prod_VSaraZmmg00J7C · price_1URffhCm0DBQF4bH7UBh86A2
```

Agent rail open — $0.02 per call over x40222:01:47

https://xemo-ship.vercel.app/api/x402/apps/xm_0mvcxy3bbrtcgp58e · eip155:8453

−$0.0002 CreateOS sandbox compute22:01:49

ReplyRate is live and selling on both rails22:01:50

humans pay $4.00 via Stripe · agents pay $0.02 via x402

What a buyer receives

Reply Likelihood ScorescoreA numeric score from 0‑100 indicating how likely the email is to get a reply.
Spam Trigger PhraseslistList of phrases or patterns in the email that could cause spam filters to block or lower deliverability.
Opening Line RewriteslistThree alternative first‑sentence openings, each written to sound engaging and avoid spam triggers.
Overall FeedbacktextBrief text summary of strengths, weaknesses, and actionable tips beyond the opening line rewrites.

Generated files

README.md1.0 kB
package.json0.4 kB
server.mjs20.4 kB
smoke-test.mjs3.8 kB