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 frontal-labs/mcp-server --skill upstash-ratelimit-jsgit clone --depth 1 https://github.com/frontal-labs/mcp-serverWrote 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/frontal-labs/mcp-server/upstash-ratelimit-js)<a href="https://agentmods.dev/skills/frontal-labs/mcp-server/upstash-ratelimit-js"><img src="https://agentmods.dev/badge/skills/frontal-labs/mcp-server/upstash-ratelimit-js/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/frontal-labs/mcp-server/upstash-ratelimit-js"><img src="https://agentmods.dev/badge/skills/frontal-labs/mcp-server/upstash-ratelimit-js.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00177 | $0.00446 |
| Opus 5.5 | $0.00071 | $0.00178 |
| Sonnet 5.5 | $0.00035 | $0.00089 |
| Haiku 4.5 | $0.00018 | $0.00045 |
Grade A, and why
upstash-ratelimit-js 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 yesterday.
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.
This is a copy
100% identical to upstash-ratelimit-js — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
What it actually says
Rate Limit TS SDK
Quick Start
- Install the SDK and connect to Redis.
- Create a rate limiter and apply it to incoming operations.
Example:
import { Ratelimit } from "@upstash/ratelimit";
import { Redis } from "@upstash/redis";
const redis = new Redis({ url: "<url>", token: "<token>" });
const limiter = new Ratelimit({ redis, limiter: Ratelimit.slidingWindow(5, "10s") });
const { success } = await limiter.limit("user-id");
if (!success) {
// throttled
}
Other Skill Files
- algorithms.md: Describes all available rate‑limiting algorithms and how they behave.
- pricing-cost.md: Explains pricing, Redis cost implications, and operational considerations.
- features.md: Lists SDK features such as prefixes, custom keys, and behavioral options.
- methods-getting-started.md: Full method reference for the SDK's API and getting started guide.
- traffic-protection.md: Guidance on applying rate limiting for traffic shaping, abuse prevention, and protection patterns.
What ships with it
5 files 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.
- yesterday First seen · 36 lines · 177 tokens per session scan A 2bce4da07ec6
upstash-ratelimit-js is a skill published in the GitHub repository frontal-labs/mcp-server (1 stars, last pushed yesterday), licensed Apache-2.0. It adds 177 tokens to every session and 446 once invoked, about $0.0007 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to upstash-ratelimit-js, differing in 0 lines, and is treated as a copy.
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