Question: I'm looking for a no-code API builder that can integrate with custom logic for my app development.

If you need a no-code API builder that can be augmented with custom logic for your app, Xano is a good option. It's got a no-code API builder along with a scalable backend service with options like a PostgreSQL database, REST and GraphQL APIs and auto-generated Swagger documentation. Xano also has security and compliance features like GDPR and ISO 27001, so it's good for SMBs and enterprises.

Another good option is Pipedream, which lets developers build sophisticated apps with low-level code control and no-code interfaces. It can integrate with more than 2,100 APIs through npm and PyPI packages, so you can run custom logic with Node.js, Python, Go or Bash. Pipedream also supports instant deployment and a wide range of APIs, including OpenAI and Salesforce.

If you're looking for a low-code visual backend builder, BuildShip is a good option. It uses AI to rapidly create workflows, APIs and cloud functions, with prebuilt nodes and AI-generated nodes for easy integration. BuildShip comes with a built-in Firestore database, unlimited cloud storage and version control, so it's good for developers and teams who want to create scalable backend services with a minimum of coding.

Last, Latenode could be useful for automating business processes and integrating apps without writing code. It's got an AI Assistant, prebuilt connectors to common SaaS services, and an API Building Kit for creating workflows. Latenode's graphical interface and low-cost automation makes it useful to people of all skill levels.