Individual skill
api-resource-consumption
Unrestricted resource consumption testing (OWASP API4) — rate limit bypass via header/key drift, races, method and identity rotation, plus expensive-query, oversized payload, batch, export, and streaming abuse with threshold-based evidence
internal/tools/skills/data/api-security/api-resource-consumption/SKILL.md
Source commit d42f381ad34843e71a42658e5c57290c713e85af
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- Last checked
- Nov 7, 2026
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- Repository last updated
- Nov 7, 2026
- License
- Apache-2.0
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# API Resource Consumption (OWASP API4)
## Purpose
Test whether the target's consumption controls (rate limits, size caps, complexity limits, quotas) can be exceeded so that requests keep being processed beyond the established control — enabling brute force, enumeration, and computational-cost abuse.
## Preconditions
- Measured baselines: what limits exist and where they trigger
- For concurrency races: parallel request capability (Python asyncio or xargs -P)
[Credential-related source omitted]
## Attack Surface Signals
- Rate-limiting headers (429 responses, Retry-After, X-RateLimit-*)
- Endpoints without any visible throttling on expensive operations
- Pagination, search/filter, sort, export/report, batch/bulk, file upload/processing