If you're wiring up an API integration Stripe, Descope, Twilio, Resend, anything drop it below with what you're building.
I'll reply with the specific ways it breaks after the happy path works: the webhook that fires twice, the event that lands late, the token that's never actually verified, the state that goes stale. The stuff that passes every test and still pages you at 2am.
That's what we've spent years (and a lot of production incidents) learning and what FetchSandbox encodes so your coding agent catches it before prod.
I'm the founder of a FetchSandbox, so take this with appropriate salt, but I went deep on integration cost research recently and one number broke my brain.
At 50 integrations, you've accidentally hired 3 full-time engineers whose entire job is hoping upstream APIs don't change.
The math: a single production-grade integration runs ~$16k in Year 1 at a $100/hr blended rate. The initial build is only 20% of total cost. The other 80% is maintenance, versioning, auth edge cases, and deprecation. Scale that to 50 integrations and you're at $800k Year 1, then $600k/year ongoing, just to keep the lights on.
The part that should land in pipeline reviews: 84% of buyers call integrations a deal-breaker, integrations come up in 60% of all sales deals, and customers with 5+ integrations are 80% less likely to churn. Most companies are treating this as a backlog engineering problem when the data says it's sitting directly in close rates and Year 1 retention.
