i build custom integration sandboxes for founders running inbound partnership conversations. fixed scope. $499. money back if you say no in 7 days.
yesterday a ceo dmed me about partnering between his platform and my api. default move would have been: schedule a call, screen-share something rough, send a "sample" later that week.
instead i opened a repo and shipped a working sandbox in 90 minutes. it hit his endpoints live and rendered the response inside a ui that looked like his product.
the conversation flipped. it stopped being "show me what this looks like" and started being "what's the commercial shape." that's the asset i build for other founders now.
stripe checkout. you'll get a calendly link on the receipt.
on may 12, 2026 a ceo at skyx international reached out about a partnership with my project rotatepilot. here's the sandbox i shipped him in 90 minutes:
what if i don't have a public api yet?
we can still ship something. on the discovery call i'll figure out whether to stub the responses, hit a private endpoint with a temp token, or fake the data for the demo. the goal is a thing your partner can click, not architectural purity.
why $499 and not $5,000?
it takes me a day of focused work, not a week. i'd rather ship five of these than one over-priced one. if you need ongoing partner-eng work after delivery we can talk separately.
who owns the code?
you do. mit license, your github org if you want it there, your repo. i keep permission to link to it as portfolio. that's the only string.
what if the partner ghosts me anyway?
the sandbox is yours forever. drop it into the next conversation. founders who use one of these in the first reply close partnerships faster than ones who promise "i'll send a demo next week."
if you have a partnership inbound sitting in your dms right now, the worst thing you can do is reply "let's hop on a call." reply with a link they can click.
48 hours from kickoff. money back in 7 days if it didn't help.