Individual skill
grpc-api-security
gRPC API security testing covering reflection, service enumeration, method-level authorization, message tampering, and transcoded REST inconsistencies
internal/tools/skills/data/api-security/grpc-api-security/SKILL.md
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- cybersecurity Repository topic
- security Repository topic
- bug-bounty Repository topic
- automation Repository topic
- autonomous-pentesting Repository topic
- ai-agent Repository topic
- ai-security Repository topic
- ethical-hacking Repository topic
- golang Repository topic
- penetration-testing Repository topic
- security Derived category
- testing Derived category
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# gRPC API Security
## Purpose
Test gRPC services for reflection exposure, method-level authorization, message tampering, and gateway/REST transcoding inconsistencies.
## Preconditions
- A gRPC endpoint identified (typically port 50051, 443 with gRPC content-type, or via gateway)
- grpcurl available (or ability to install: go install github.com/fullstorydev/grpcurl/cmd/grpcurl@latest)
## Attack Surface Signals
- HTTP/2 with `Content-Type: application/grpc` or `application/grpc+proto`
- Port 50051, 50052, 6565 commonly used for gRPC
- `grpc-status` in response trailers
- gRPC-Web content-type: `application/grpc-web+proto`