x402

x402 is a skill for Claude Code from internet-court/internet-court-skill. It costs 0 tokens per session (743 once invoked), scanned A, original, no licence file.

A skill for using x402, a payment method that lets software pay for an online endpoint or charge others for access to one.

In plain words
What is it for?
Use it when an agent needs to pay an x402-enabled endpoint or when a developer wants to add x402 payments to an endpoint.
Why use it?
It helps connect payment handling with requests to online services, for both callers and endpoint owners.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the internet-court plugin — 94 skills shipped together

Good fit Use it when an agent needs to pay an x402-enabled endpoint or when a developer wants to add x402 payments to an endpoint.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/internet-court/internet-court-skill/x402
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 internet-court/internet-court-skill --skill x402
Clone the repo
git clone --depth 1 https://github.com/internet-court/internet-court-skill

Made for: Claude Code.

Or install internet-court, the plugin that ships this one along with the rest of its 94 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 x402

README.md
[![agentmods](https://agentmods.dev/badge/skills/internet-court/internet-court-skill/x402/github.svg)](https://agentmods.dev/skills/internet-court/internet-court-skill/x402)
Your own site
<a href="https://agentmods.dev/skills/internet-court/internet-court-skill/x402"><img src="https://agentmods.dev/badge/skills/internet-court/internet-court-skill/x402/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 x402

Your own site · 80×15
<a href="https://agentmods.dev/skills/internet-court/internet-court-skill/x402"><img src="https://agentmods.dev/badge/skills/internet-court/internet-court-skill/x402.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 743 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00000 $0.00743
Opus 5 $0.00000 $0.00371
Sonnet 5 $0.00000 $0.00149
Haiku 4.5 $0.00000 $0.00074

Measured 13d ago against content hash cc5a82488bd0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

x402 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 13d 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.

vendored/chaingpt/x402/SKILL.md · 48 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Files

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.

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. 13d ago First seen · 48 lines · 0 tokens per session scan A cc5a82488bd0

Subscribe to this mod's changes

x402 is a skill published in the GitHub repository internet-court/internet-court-skill (5,588 stars, last pushed 24d ago), with no licence file. It costs nothing until one of its globs matches a file; then it loads 743 tokens. 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.

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