auditing-grpc-service-authorization SKILL.md skillA
auditing-grpc-service-authorization from unboundcompute/security-agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add unboundcompute/security-agent-skills/auditing-grpc-service-authorization@git:20260825.70f8609Pins git:20260825.70f8609 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- unboundcompute/security-agent-skills
- Path
skills/auditing-grpc-service-authorization/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260825.70f8609, committed Aug 25, 2026
- Size
- 9,903 bytes
- Repository stars
- 26
- License
- MIT
Audit a gRPC service for a method a caller can reach without the authorization the service assumes an interceptor enforces, after the interceptor coverage and the channel credentials are resolved. Covers authorization installed on the unary interceptor while the streaming chain omits it, a per-method authorization gap reachable at the wrong privilege, server reflection enabled in production exposing the full API, a plaintext channel with metadata trusted unverified, an absent message-size or…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Auditing gRPC service authorization: the method the interceptor does not cover A gRPC service usually centralizes authorization in an interceptor, and the bug is a method the interceptor does not actually cover. The classic shape is an auth interceptor installed on the unary chain while the streaming chain runs without it, so a streaming RPC is callable with no credentials. You audit it by resolving which interceptors are registered and which methods and stream types they actually gate, then checking each method the check assumes is covered. The other half is the channel: a plaintext or insecure channel, metadata trusted without verification, missing message and recursion limits, and a transcoding gateway that fronts the service without the same auth filter. Certificate-validation mechanics belong to the transport skill; this skill owns whether a reachable method is authorized. ## When to use - You are reviewing a gRPC server's service registration, interceptor chain, and method handlers. - The service enforces authorization in an interceptor, or is fronted by a transcoding gateway. …
Read the whole file at its exact version.
How to install
mdr add unboundcompute/security-agent-skills/auditing-grpc-service-authorization@sha256:84cf92d10446dcafThe line at the top of this page pins the label git:20260825.70f8609, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_6izlhc6rkolmvgrx)
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Versions
The registry has recorded 1 version of this file, committed on Aug 25, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
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- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
unboundcompute/security-agent-skills · 26 stars · license MIT · pushed 2026-09-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_6izlhc6rkolmvgrx GET https://markdownregistry.com/api/v1/resolve?ref=unboundcompute/security-agent-skills/auditing-grpc-service-authorization GET https://markdownregistry.com/api/v1/blob/84cf92d10446dcaf08f38222a325bd461547fdf5438deb88d048f7002b621131
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.