Akto is an open-source platform for cataloguing APIs, testing them for security vulnerabilities, and detecting runtime issues. It is used by security and engineering teams to monitor API inventories, run business-logic tests in CI/CD, and identify weaknesses in deployed APIs.
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.
git clone --depth 1 https://github.com/akto-api-security/aktoWrote 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/rules/akto-api-security/akto/akto-core-rules)<a href="https://agentmods.dev/rules/akto-api-security/akto/akto-core-rules"><img src="https://agentmods.dev/badge/rules/akto-api-security/akto/akto-core-rules.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 5.1 | $0.00129 | $0.00129 |
| Opus 5 | $0.00064 | $0.00064 |
| Sonnet 5 | $0.00026 | $0.00026 |
| Haiku 4.5 | $0.00013 | $0.00013 |
Grade A, and why
akto-core-rules scanned grade A with 0 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 3d 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
- DO NOT REPEAT CODE, EVER
- IF ANY CODE/FUNCTION/BLOCK CAN BE REUSED, REUSE IT.
- IF ANY PIECE OF CODE HAS BEEN CREATED BY YOU, BUT NOT BEING USED, DELETE IT.
- ALL IMPORTS MUST BE AT THE TOP OF THE FILE. NEVER USE INLINE IMPORTS.
- AFTER A DESIGN CHANGE, DELETE EVERY REMNANT OF THE DROPPED APPROACH. NO UNUSED FIELDS, NO PROTO
reservedFOR UNSHIPPED NUMBERS, NO DUPLICATE FLAGS FOR A FACT AN EXISTING FIELD ALREADY ENCODES.
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.
- 3d ago Changed · +1 lines · +55 tokens per session c0755434dc1b
- 7d ago First seen · 8 lines · 74 tokens per session scan A 108b7107cff6
akto-core-rules is a cursor rule published in the GitHub repository akto-api-security/akto (1,512 stars, last pushed 2d ago), licensed MIT. It adds 129 tokens to every session, about $0.0006 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other cursor rules, from other repositories
mcpnuke-tests
Test conventions for mcpnuke — enforces TDD workflow.
selectools-development
Selectools development conventions, testing requirements, and release process.
ponytail
Ponytail, lazy senior dev mode. Always pick the simplest solution that works.
angular-20
This rule provides comprehensive best practices and coding standards for Angular development, focusing on modern TypeScript, standalone components, signals, and performance optimizations.
dev-standard
Apache Superset development standards and guidelines for Cursor IDE.
cli-error-handling
CLI command error handling patterns.