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 hoangatg/ai-agent-toolkit --skill api-rate-limitinggit clone --depth 1 https://github.com/hoangatg/ai-agent-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/hoangatg/ai-agent-toolkit/api-rate-limiting)<a href="https://agentmods.dev/skills/hoangatg/ai-agent-toolkit/api-rate-limiting"><img src="https://agentmods.dev/badge/skills/hoangatg/ai-agent-toolkit/api-rate-limiting.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 | $0.00040 | $0.00341 |
| Opus 5 | $0.00020 | $0.00170 |
| Sonnet 5 | $0.00008 | $0.00068 |
| Haiku 4.5 | $0.00004 | $0.00034 |
Grade A, and why
api-rate-limiting 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 6d 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
API Rate Limiting
Protect your APIs from abuse while ensuring fair usage for all consumers.
Algorithm Comparison
| Algorithm | Description | Best For |
|---|---|---|
| Token Bucket | Tokens refill at fixed rate | Burst-tolerant APIs |
| Sliding Window | Count requests in rolling window | Precise rate limiting |
| Fixed Window | Count per time interval | Simple implementation |
| Leaky Bucket | Process at constant rate | Smooth output rate |
Implementation Patterns
Headers (Standard)
X-RateLimit-Limit: 100
X-RateLimit-Remaining: 42
X-RateLimit-Reset: 1626847200
Retry-After: 60
Storage Options
| Storage | Latency | Distributed |
|---|---|---|
| In-memory | μs | ❌ Single server |
| Redis | ~1ms | ✅ |
| Cloudflare KV | ~10ms | ✅ Global |
| DynamoDB | ~5ms | ✅ |
Rate Limit Strategies
| Strategy | Description |
|---|---|
| Per-User | Limits per authenticated user |
| Per-IP | Limits per client IP |
| Per-API-Key | Limits per API key / tier |
| Global | Total requests across all clients |
| Endpoint-specific | Different limits per route |
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.
- 6d ago First seen · 49 lines · 40 tokens per session scan A 902ddaba24f1
api-rate-limiting is a skill published in the GitHub repository hoangatg/ai-agent-toolkit (1 stars, last pushed 5mo ago), licensed MIT. It adds 40 tokens to every session and 341 once invoked, about $0.0002 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 2026-08-31.
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