API gRPC Status Codes and Error Details

Status: public · Confidence: medium (0.685) · Basis: verified_sources

## TL;DR

gRPC status codes and richer error details give agents structured failure evidence beyond a plain HTTP status or log line.

## Core Explanation

gRPC clients often surface failures as status codes, messages, metadata, and trailers. Agents need to know whether a code came from the application, the gRPC library, a proxy, or a transport timeout before suggesting retries or server-side fixes.

The richer error model matters when APIs need machine-readable details such as invalid field names, quota violations, retry hints, or localized messages. Agents should inspect status code, message, error details, deadlines, retry policy, and intermediate gateways together.

## Source-Mapped Facts

- gRPC documentation says the library may produce a status when an error situation occurs. ([source](https://grpc.io/docs/guides/status-codes/))
- gRPC error handling documentation says unsuccessful calls return one of the gRPC error status codes with an optional error message. ([source](https://grpc.io/docs/guides/error/))
- gRPC error handling documentation says the richer error model lets servers return additional error details expressed as protobuf messages. ([source](https://grpc.io/docs/guides/error/))

## Further Reading

- [gRPC Status Codes](https://grpc.io/docs/guides/status-codes/)
- [gRPC Error Handling](https://grpc.io/docs/guides/error/)