restler-fuzzing SKILL.md skillA
restler-fuzzing from testland/qa is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add testland/qa/restler-fuzzing@git:20260728.1bce424Pins git:20260728.1bce424 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- testland/qa
- Path
plugins/qa-api-testing/skills/restler-fuzzing/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260728.1bce424, committed Jul 28, 2026
- First version recorded
- Jul 6, 2026
- Size
- 9,084 bytes
- Repository stars
- 11
- License
- MIT
Runs stateful REST API fuzzing using Microsoft's RESTler - infers producer-consumer dependencies from an OpenAPI spec, drives sequences of requests (POST → GET → DELETE chains), and reports 5xx errors, resource leaks, and hierarchy violations. Wraps the canonical 4-stage workflow (compile → test → fuzz-lean → fuzz). Use when the API is stateful (resources are created, queried, modified, deleted) and Schemathesis's stateless fuzzing is missing the multi-step bugs.
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
# restler-fuzzing
## Overview
RESTler is a stateful REST API fuzzer that finds security and reliability bugs
([restler-readme][readme]). Its differentiator vs. stateless fuzzers like
`schemathesis-fuzzing` is that it **infers producer-consumer dependencies** from
the OpenAPI spec - if `POST /resources` returns an `id` and `GET /resources/{id}`
accepts that `id`, RESTler sequences them in that order to reach deeper state.
[readme]: https://github.com/microsoft/restler-fuzzer
## When to use
- The API is **stateful**: resources are created, queried, modified,
deleted, and bugs lurk in the dependency chains.
- A team is on Schemathesis already but suspects multi-step bugs
aren't being reached. RESTler is the next layer down.
- A new service is launching and the team wants the broadest
possible auto-coverage before releasing - particularly for cloud
services.
- The API exposes a complete OpenAPI 2.0 / 3.x specification (RESTler
consumes JSON or YAML).
If the API is **stateless** (search endpoints, calculator endpoints,
report-generation endpoints), Schemathesis is sufficient and lighter
to operate. RESTler shines on resource lifecycle APIs.
## Install
…Read the whole file at its exact version.
How to install
mdr add testland/qa/restler-fuzzing@sha256:18eed9d72cf3d399The line at the top of this page pins the label git:20260728.1bce424, 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_4bnwumr6z6uiju73)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Jul 6, 2026 and Jul 28, 2026, about one every 5 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260728.1bce424 latest | 2026-07-28 | 1bce424 | 9,084 B | A | view · diff |
| git:20260724.d4db756 | 2026-07-24 | d4db756 | 10,311 B | A | view · diff |
| git:20260718.ab29907 | 2026-07-18 | ab29907 | 10,419 B | A | view · diff |
| git:20260706.d9cec5f | 2026-07-06 | d9cec5f | 10,663 B | A | view · diff |
| git:20260706.4e1409c | 2026-07-06 | 4e1409c | 10,665 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (9084 bytes)
- 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
testland/qa · 11 stars · license MIT · pushed 2026-10-20 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_4bnwumr6z6uiju73 GET https://markdownregistry.com/api/v1/resolve?ref=testland/qa/restler-fuzzing GET https://markdownregistry.com/api/v1/blob/18eed9d72cf3d39939c643b62b539a69f817e6d0f520bb4811de7295c78b0988
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.