Deploy your Zod app to Fly.io
Step-by-step deployment help for Zod apps on Fly.io. We fix Zod-specific deployment issues, configure Fly.io, and get your app live. From $19.
Zod issues we fix before deploying
Common Zod problems that affect Fly.io deployments.
Incomplete schema validation
Zod schemas that validate the happy path but miss edge cases like empty strings, negative numbers, or overly long inputs that break downstream logic.
Schema-data mismatch
Zod schemas that don't match the actual API response or database shape, causing runtime parse errors that crash the application.
Missing transform and refinement
Schemas that accept raw input without transforming (trimming strings, normalizing emails) or refining (custom business rules), leading to dirty data in the database.
No error message customization
Default Zod error messages exposed directly to users, showing technical details like 'Expected string, received number' instead of user-friendly messages.
Fly.io deployment issues we check for
Common Fly.io problems that break Zod apps in production.
Dockerfile missing or misconfigured
Fly.io requires a Dockerfile for deployment. AI tools that scaffold without one force flyctl to auto-generate a suboptimal Dockerfile that misses build steps.
Volume only available in a single region
Fly volumes are pinned to one region. Multi-region deployments try to access a volume that doesn't exist in other regions, causing crashes.
Machine restarts losing in-memory state
AI-generated apps store session data or caches in memory. Fly machines can restart or migrate, wiping all in-memory state without warning.
Internal DNS resolution failing between services
Services within a Fly organization communicate via <app>.internal hostnames, but AI-generated code hardcodes localhost or public URLs.
Start with a self-serve audit
Get a professional review of your Zod project before deploying to Fly.io.
External Security Scan
Black-box review of your public-facing app. No code access needed.
- OWASP Top 10 vulnerability check
- SSL/TLS configuration analysis
- Security header assessment
- Expert review within 24h
Code Audit
In-depth review of your source code for security, quality, and best practices.
- Security vulnerability analysis
- Code quality review
- Dependency audit
- Architecture review
- Expert + AI code analysis
Complete Bundle
Both scans in one package with cross-referenced findings.
- Everything in both products
- Cross-referenced findings
- Unified action plan
100% credited toward any paid service. Start with an audit, then let us fix what we find.
How it works
Tell us about your app
Share your project details and what you need help with.
Expert + AI audit
A human expert assisted by AI reviews your code within 24 hours.
Launch with confidence
We fix what needs fixing and stick around to help.
Frequently asked questions
How do I deploy a Zod app to Fly.io?
We handle Zod deployments to Fly.io end to end. Start with our code audit ($19) to identify deployment blockers specific to your Zod project, then we configure Fly.io, fix issues, and get your app live in production.
What Zod issues affect Fly.io deployments?
Zod projects commonly have incomplete schema validation and schema-data mismatch. On Fly.io, these combine with dockerfile missing or misconfigured and volume only available in a single region to cause deployment failures.
Can SpringCode deploy my Zod project to Fly.io?
Yes. We specialize in deploying Zod applications to Fly.io. We audit your codebase for Zod-specific issues, configure Fly.io correctly, and handle the full deployment so your app runs reliably in production.
What does Zod deployment to Fly.io cost?
Our code audit ($19) identifies all Fly.io deployment blockers in your Zod project. Full deployment assistance is scoped with a fixed quote after the audit — no hourly billing or surprise charges.
Related resources
Other techs on Fly.io
Deploy Zod elsewhere
Need help deploying Zod to Fly.io?
Tell us about your project. We'll respond within 24 hours with a clear plan and fixed quote.