Narrow APIs developers call to solve one repeated problem.
e-invoicing
Developer API for German e-invoices: JSON in, then a validated ZUGFeRD/Factur-X PDF and XRechnung out, plus parsing of received e-invoices, ahead of the 2027–28 B2B mandate
$10k MRR, full-time: ≈ 22 in 100
Savefintech & lending
An India business-day API for lenders, fintechs and brokers: RBI bank holidays for all 34 centres, plus RTGS and exchange trading and settlement holidays, with a source for each date, change alerts, and a history of past answers
$10k MRR, full-time: ≈ 10 in 100
Saveweb agencies
A form backend for static, no-code and AI-built sites. The only fallback is a German-language, EU-hosted backend with a GDPR data-processing agreement for German-speaking (DACH) web agencies
$10k MRR, full-time: ≈ 5 in 100
Save