head to head · open source
SkillSpector vs api-relay-audit
SkillSpector has 23,886 GitHub stars, 2,061 forks, 136 open issues and last shipped yesterday. api-relay-audit has 904 stars, 83 forks, 26 open issues and last shipped 7 days ago. SkillSpector leads on adoption by 2,542% (23,886 vs 904 stars). SkillSpector is written in Python under Apache-2.0; api-relay-audit is written in Python under AGPL-3.0. SkillSpector has attracted 9% as many forks as stars, api-relay-audit 9%. SkillSpector was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (ai-security), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| SkillSpector | api-relay-audit | |
|---|---|---|
| GitHub stars | ★ 24K | ★ 904 |
| License | Apache-2.0 | AGPL-3.0 |
| Written in | Python | Python |
| Last push | 2026-11-02 | 2026-10-27 |
| Forks | ⑂ 2.1K | ⑂ 83 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick SkillSpector if
- You weight community size — 24K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick api-relay-audit if
- You want the api-relay-audit feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches Python
- You evaluated both and api-relay-audit fits your workflow better
About SkillSpector
SkillSpector Security scanner for AI agent skills. Detect vulnerabilities, malicious patterns, and security risks before installing agent skills. Overview AI agent skills (used by Claude Code, Codex CLI, Gemini CLI, etc.) execute with implicit trust and minimal vetting. In the 31,132 skill analyzed subset of the research dataset, 26.1% of skills contain vulnerabilities and 5.2% show likely malicious intent . SkillSpector helps you answer: "Is this skill safe to install?" SkillSpector is part of the NVIDIA Verified Skills pipeline, which scans, evaluates, and signs agent skills before publication. Skills that…
read the full SkillSpector overview →
About api-relay-audit
API Relay Audit Local security audit for AI API relays and LLM proxies. DSH Plugin Your Agent Is Mine: what you can test locally Your Agent Is Mine documents malicious API relays injecting payloads and exfiltrating credentials. Anthropic's September 10, 2026 report describes fraudulent Claude resellers swapping models and harvesting credentials through their client tooling. In his September 11 disclosure, co author Chaofan Shou reports buying router data containing users' credentials. API Relay Audit is an independent, local security audit tool for AI API relays and LLM proxies, informed by the paper. The…
read the full api-relay-audit overview →
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Frequently asked questions
Is SkillSpector or api-relay-audit more popular?
SkillSpector has 23,886 GitHub stars and api-relay-audit has 904. SkillSpector has the larger community by that measure.
Are SkillSpector and api-relay-audit free?
Both are open source. SkillSpector is licensed under Apache-2.0 and api-relay-audit under AGPL-3.0. Neither carries a licence fee.
What is the difference between SkillSpector and api-relay-audit?
SkillSpector is written in Python and api-relay-audit in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, SkillSpector or api-relay-audit?
Choose SkillSpector if you want the larger community (23,886 stars) or its Apache-2.0 licence terms. Choose api-relay-audit if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.