gRPC
3 INVALID_ARGUMENT
The client specified an invalid argument. This indicates arguments that are problematic regardless of the state of the system.
When You See This Code
A request field failed validation — for example, a negative page size, a malformed email, or a required field left empty.
How to Fix
Inspect the request payload and fix the invalid field. Check the API documentation for expected formats and constraints.
Specification
View RFC / Specification →Cross-Protocol Equivalents
Guides
Choosing the Right HTTP Status Codes for REST APIs
API Design
gRPC Status Codes: A Practical Guide
API Design
Debugging Timeout Errors: 408 and 504
Debugging & Troubleshooting
How to Implement and Handle Rate Limiting (429)
API Design
API Versioning Strategies: URL, Header, and Query Param
API Design
Designing Consistent API Error Responses
API Design
API Keys vs OAuth vs JWT: Choosing the Right Auth Method
Security & Authentication