card-rate

card-rate is a skill for Claude Code from jiahongc/credit-card-skills. It costs 38 tokens per session (558 once invoked), scanned A, original, no licence file.

A lookup for the points or cash-back earning rules of one major U.S. credit card, including rates, limits, exclusions, activation needs, and merchant-coding details.

In plain words
What is it for?
Use it to check earning rates, spending caps, excluded purchases, activation requirements, and whether a merchant is likely to qualify.
Why use it?
It helps resolve uncertainty about how a purchase will earn rewards, including cases where the store's payment category affects the rate.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Part of the credit-card-skills plugin — 11 skills shipped together

Good fit Use it to check earning rates, spending caps, excluded purchases, activation requirements, and whether a merchant is likely to qualify.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/jiahongc/credit-card-skills/card-rate
Install

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.

Any agent
npx skills add jiahongc/credit-card-skills --skill card-rate
Clone the repo
git clone --depth 1 https://github.com/jiahongc/credit-card-skills

Made for: Claude Code.

Or install credit-card-skills, the plugin that ships this one along with the rest of its 11 skills.

Wrote 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.

agentmods badge for card-rate

README.md
[![agentmods](https://agentmods.dev/badge/skills/jiahongc/credit-card-skills/card-rate/github.svg)](https://agentmods.dev/skills/jiahongc/credit-card-skills/card-rate)
Your own site
<a href="https://agentmods.dev/skills/jiahongc/credit-card-skills/card-rate"><img src="https://agentmods.dev/badge/skills/jiahongc/credit-card-skills/card-rate/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.

agentmods 80×15 button for card-rate

Your own site · 80×15
<a href="https://agentmods.dev/skills/jiahongc/credit-card-skills/card-rate"><img src="https://agentmods.dev/badge/skills/jiahongc/credit-card-skills/card-rate.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 38 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 558 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00038 $0.00558
Opus 5 $0.00019 $0.00279
Sonnet 5 $0.00008 $0.00112
Haiku 4.5 $0.00004 $0.00056

Measured 12d ago against content hash 9a08e8fd4dc6, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

card-rate scanned grade A with 1 finding 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 12d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

allowed-tools: Read, Bash(curl -sS *)
.claude/skills/card-rate/SKILL.md · 47 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Changes

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.

  1. 12d ago First seen · 47 lines · 38 tokens per session scan A 9a08e8fd4dc6

Subscribe to this mod's changes

card-rate is a skill published in the GitHub repository jiahongc/credit-card-skills (5 stars, last pushed 5d ago), with no licence file. It adds 38 tokens to every session and 558 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.