Replit
api
Request Validation Failed on Replit
API returns 400 Bad Request with validation errors. Request payload doesn't match expected format or constraints.
Request validation catches invalid or malformed data before processing.
Error Messages You Might See
400 Bad Request
validation failed
field validation error
Common Causes
- Missing required fields in request body
- Field type mismatch (string instead of number)
- Constraint violation (length, pattern, range)
- Unknown fields in request (if validation strict)
- Date format incorrect
How to Fix It
For Spring Boot, use @Valid with bean validation annotations (@NotNull, @Size, @Email). Check validation error messages in response. Use @JsonIgnoreProperties(ignoreUnknown=false) to reject unknown fields. Test request format with Postman. Return detailed validation error responses to client.
Real developers can help you.
ISHANTDEEP SINGH
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Jared Hasson
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Kingsley Omage
Fullstack software engineer passionate about AI Agents, blockchain, LLMs.
Pratik
SWE with 15+ years of experience building and maintaining web apps and extensive BE infrastructure
Basel Issmail
’m a Senior Full-Stack Developer and Tech Lead with experience designing and building scalable web platforms. I work across the full development lifecycle, from translating business requirements into technical architecture to delivering reliable production systems.
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Embedded Engineer specilizing in perception systems. Latest project was a adas camera calibration system.
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I'm a full-stack developer focused on building practical and scalable web applications. My main experience is with **React, TypeScript, and modern frontend architectures**, where I prioritize clean code, component reusability, and maintainable project structures.
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Vlad Temian
15+ years shipping production infrastructure for startups. Former CTO at qed.builders (acquired by The Sandbox).
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Experienced Professional Full stack Developer with 8+ years of experience across react, python, js, ts, golang and react-native. Developed inhouse websearch tooling for AI before websearch was solved : )
Taufan
I’m a product-focused engineer and tech leader who builds scalable systems and turns ideas into production-ready platforms.
Over the past years, I’ve worked across startups and fast-moving teams, leading backend architecture, improving system reliability, and shipping products used by thousands of users. My strength is not just writing code — but connecting product vision, technical execution, and business impact.
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Get HelpFrequently Asked Questions
How do I add validation?
Use annotations: @NotNull, @Size(min=1, max=100), @Email on fields
How do I return validation errors?
@ExceptionHandler catches MethodArgumentNotValidException and returns errors