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 skills add softspark/ai-toolkit --skill api-patternsgit clone --depth 1 https://github.com/softspark/ai-toolkitWrote 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/skills/softspark/ai-toolkit/api-patterns)<a href="https://agentmods.dev/skills/softspark/ai-toolkit/api-patterns"><img src="https://agentmods.dev/badge/skills/softspark/ai-toolkit/api-patterns/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/softspark/ai-toolkit/api-patterns"><img src="https://agentmods.dev/badge/skills/softspark/ai-toolkit/api-patterns.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high Tool Misuse · line 24 Tool parameters are crafted to achieve unintended or unsafe behavior. Parameter abuse can bypass intended safety checks (e.g. shell=True, --force, dangerous glob patterns).Fix: Validate all tool parameters against an allowlist. Reject dangerous parameter values (shell=True, --force, -rf /) and use safe defaults.
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 | $0.00052 | $0.03396 |
| Opus 5.5 | $0.00021 | $0.01358 |
| Sonnet 5.5 | $0.00010 | $0.00679 |
| Haiku 4.5 | $0.00005 | $0.00340 |
Grade A, and why
api-patterns 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 1mo 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.
How it starts
The opening of the file, as written. The whole thing — 437 lines — stays where its author put it; the contents beside it link to each section on GitHub.
API Patterns Skill
REST API Design
Resource Naming
# Collection
GET /api/v1/documents # List documents
POST /api/v1/documents # Create document
# Single resource
GET /api/v1/documents/{id} # Get document
PUT /api/v1/documents/{id} # Replace document
PATCH /api/v1/documents/{id} # Update document
DELETE /api/v1/documents/{id} # Delete document
# Nested resources
GET /api/v1/users/{id}/documents # User's documents
HTTP Status Codes
| Code | Meaning | When to Use |
|---|---|---|
| 200 | OK | Successful GET/PUT/PATCH |
| 201 | Created | Successful POST |
| 204 | No Content | Successful DELETE |
| 400 | Bad Request | Malformed request or an established domain refusal |
| 401 | Unauthorized | Missing/invalid auth |
| 403 | Forbidden | No permission |
| 404 | Not Found | Resource doesn't exist |
| 405 | Method Not Allowed | Unsupported method; preserve Allow |
| 409 | Conflict | Duplicate resource or current-state conflict |
| 412 | Precondition Failed | Supplied concurrency version is stale |
| 422 | Unprocessable | Validation error |
| 428 | Precondition Required | Required concurrency precondition is missing |
| 429 | Too Many Requests | Rate limited |
| 500 | Internal Error | Server error |
| 503 | Service Unavailable | Dependency temporarily unavailable |
Response Format
Follow the host's existing resource and collection contract. This envelope is illustrative; do not impose it on a framework that already defines another shape.
{
"data": {
"id": "123",
"type": "document",
"attributes": {
"title": "Example",
"content": "..."
}
},
"meta": {
"total": 100,
"page": 1,
"per_page": 10
}
}
Error Response
Use the established error representation, which may be problem details, framework validation errors, or a domain-specific envelope like this example:
{
"error": {
"code": "VALIDATION_ERROR",
"message": "Invalid input",
"details": [
{"field": "title", "message": "Title is required"},
{"field": "limit", "message": "Must be between 1 and 100"}
]
}
}
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 1mo ago Changed · +26 lines · +4 tokens per session 83362ca5b0ec
- 1mo ago First seen · 411 lines · 48 tokens per session scan A f28df25626ea
api-patterns is a skill published in the GitHub repository softspark/ai-toolkit (180 stars, last pushed yesterday), licensed Apache-2.0. It adds 52 tokens to every session and 3,396 once invoked, about $0.0002 per session on Opus 5.5. 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 skills, from other repositories
api-design
REST API contract designer and reviewer. ALWAYS use when designing new endpoints, reviewing existing API contracts, planning API versioning, or standardizing error models. Covers resource modeling (URL/naming), HTTP method semantics, status code selection, error model consistency, pagination/filtering/sorting…
kafka-event-driven-design
Kafka event-driven architecture designer and reviewer, at the application/client layer. ALWAYS use when designing, reviewing, or troubleshooting how a service produces or consumes Kafka events — topic and partition-key design, producer and consumer client configuration, consumer group topology, event schema definition…
thirdparty-api-integration-test
Create and run gated Go integration tests for third-party APIs with real external calls, strict configuration gates, bounded timeouts, and safe runtime controls. Use for vendor/client contract verification and failure triage.
plugin-system
Generic plugin system for Python applications. Auto-discovery, validation, fault tolerance. Zero dependencies (Python stdlib only).
api-caller-subagent
Sous-agent spécialisé dans les appels API REST/GraphQL avec retry, auth et transformation de données. Se déclenche avec "sous-agent API", "API caller agent", "agent qui appelle une API", "REST agent", "HTTP agent", "API integration subagent", "external API agent". Also triggers on "subagent that calls an API", "API…
cost-optimizer
Optimisation des coûts des agents IA — tokens, API calls, modèles, caching, routing, budget controls. Se déclenche avec "coût agent", "agent cher", "réduire les coûts IA", "token optimization", "optimiser les tokens", "budget agent", "agent cost", "économiser sur l'API". Also triggers on "reduce agent cost", "token…