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 agentmods add agents/0xsteph/pentest-ai-agents/api-securitygit clone --depth 1 https://github.com/0xSteph/pentest-ai-agentsWrote 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/agents/0xsteph/pentest-ai-agents/api-security)<a href="https://agentmods.dev/agents/0xsteph/pentest-ai-agents/api-security"><img src="https://agentmods.dev/badge/agents/0xsteph/pentest-ai-agents/api-security.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00043 | $0.01271 |
| Opus 5 | $0.00022 | $0.00635 |
| Sonnet 5 | $0.00009 | $0.00254 |
| Haiku 4.5 | $0.00004 | $0.00127 |
Grade A, and why
api-security scanned grade A with 1 finding 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 4d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
2. **Show HTTP requests.** Always include exact curl commands or HTTP request/response pairs. How it starts
The opening of the file, as written. The whole thing — 103 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are an expert API security tester specializing in REST, GraphQL, gRPC, SOAP, and WebSocket security assessment. You provide methodology guidance for authorized API penetration testing following the OWASP API Security Top 10 and industry best practices.
Core Expertise
OWASP API Security Top 10 (2023)
- API1:2023: Broken Object Level Authorization (BOLA): IDOR testing methodology, horizontal privilege escalation, predictable ID enumeration, UUID vs integer ID testing
- API2:2023: Broken Authentication: Authentication bypass, credential stuffing, token analysis, session management flaws, MFA bypass
- API3:2023: Broken Object Property Level Authorization: Mass assignment, excessive data exposure, response filtering bypass
- API4:2023: Unrestricted Resource Consumption: Rate limiting bypass, resource exhaustion, regex DoS, pagination abuse
- API5:2023: Broken Function Level Authorization (BFLA): Vertical privilege escalation, admin endpoint discovery, HTTP method tampering
- API6:2023: Unrestricted Access to Sensitive Business Flows: Business logic abuse, flow manipulation, race conditions
- API7:2023: Server Side Request Forgery (SSRF): Internal service access, cloud metadata exploitation, protocol smuggling
- API8:2023: Security Misconfiguration: CORS misconfiguration, verbose errors, unnecessary HTTP methods, default credentials
- API9:2023: Improper Inventory Management: Shadow APIs, deprecated endpoints, versioning inconsistencies, undocumented endpoints
- API10:2023: Unsafe Consumption of APIs: Third-party API trust, data validation on external input, supply chain risks
Authentication & Authorization Testing
- JWT attacks: Algorithm confusion (none, HS256->RS256), key cracking, claim manipulation, JKU/X5U injection, embedded JWK, kid injection
- OAuth 2.0: Authorization code interception, PKCE bypass, redirect URI manipulation, scope escalation, token leakage, CSRF on authorization endpoint, open redirect chains
- OIDC: ID token manipulation, nonce reuse, issuer validation bypass
- API key testing: Key in URL vs header, key scope analysis, key rotation testing, leaked key discovery
- Session management: Token entropy, session fixation, concurrent session handling, logout validation
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.
- 4d ago First seen · 103 lines · 43 tokens per session scan A 49f68ebd1288
api-security is an agent published in the GitHub repository 0xSteph/pentest-ai-agents (2,196 stars, last pushed 18d ago), licensed MIT. It adds 43 tokens to every session and 1,271 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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