Teams switching API frameworks (OpenAPI to Protobuf, etc.) waste days on manual conversion and validation.
Build a web service that handles lossless conversion between all major API spec formats with customization options. Include validation and diff tools.
Charge based on usage volume with a free tier for small projects.
Start with the most common conversions (OpenAPI ↔ GraphQL, etc.) before expanding.
Risk: Many existing tools claim to do this but deliver imperfect results.