aegis-api-token-security SKILL.md skillA
aegis-api-token-security from as-foss/aegis-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add as-foss/aegis-skills/aegis-api-token-security@git:20260826.9702747Pins git:20260826.9702747 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- as-foss/aegis-skills
- Path
skills/server/api-token-security/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260826.9702747, committed Aug 26, 2026
- First version recorded
- Aug 25, 2026
- Size
- 49,435 bytes
- Repository stars
- 16
- License
- Apache-2.0
Audits the full lifecycle of bearer/API tokens protecting an internet-exposed HTTP API — minting entropy and format, hash-only server storage, transport rules, scoping, expiry and rotation, revocation, per-key rate limits, and log hygiene — with read-only evidence commands and hardened reference implementations.
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
## Scope & Objectives Audit every stage of the token lifecycle for one internet-exposed HTTP API that authenticates machine clients with opaque bearer/API tokens (strings presented as `Authorization: Bearer <token>` or an API-key header). Ten domains, in priority order: 1. **Design** — entropy floor (>=128 bits from a CSPRNG), format conventions (type prefix, checksum), forbidden token bases. 2. **Server-side storage** — the classic fatal flaw: plaintext or reversibly encrypted tokens in the database versus store-the-hash-only. 3. **Transport** — TLS-only enforcement, header versus query-string versus cookie carriage. 4. **Scoping & privilege model** — god-tokens versus scoped, tenant-bound, read/write-separated keys. 5. **Expiry & rotation** — lifetime policy, downtime-free rotation with overlap windows, stale-token reaping. 6. **Revocation & incident readiness** — revocation latency including cached-auth gaps, leak-response runbook. 7. **Rate limiting & abuse controls** — per-key quotas, 429 semantics, unauthenticated-endpoint separation. 8. **Key-enumeration resistance** — uniform timing/error behavior on invalid tokens. …
Read the whole file at its exact version.
How to install
mdr add as-foss/aegis-skills/aegis-api-token-security@sha256:d9800eef7e14ad3cThe line at the top of this page pins the label git:20260826.9702747, 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_4tzwurm6kqtyi4xx)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Aug 25, 2026 and Aug 26, 2026, more than one a day.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260826.9702747 latest | 2026-08-26 | 9702747 | 49,435 B | A | view · diff |
| git:20260825.85624bc | 2026-08-25 | 85624bc | 49,436 B | A | view · diff |
| git:20260825.244c198 | 2026-08-25 | 244c198 | 48,314 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 (49435 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
as-foss/aegis-skills · 16 stars · license Apache-2.0 · pushed 2026-08-26 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_4tzwurm6kqtyi4xx GET https://markdownregistry.com/api/v1/resolve?ref=as-foss/aegis-skills/aegis-api-token-security GET https://markdownregistry.com/api/v1/blob/d9800eef7e14ad3cf96f7b48dfe9e06371f5e2c666777450756c923931f72b72
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.