Agent skill

Mppx

by internet-court in internet-court/internet-court-skill

TypeScript SDK for the Payment HTTP Authentication Scheme. An agent skill from internet-court/internet-court-skill.

Apache-2.0Auto-check passedBackend & APIs

Install Mppx

skills CLI

$ npx skills add internet-court/internet-court-skill --skill mppx -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install internet-court/internet-court-skill mppx --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/internet-court/internet-court-skill.git skills-src && mkdir -p .claude/skills && cp -r skills-src/vendored/tempo/mppx .claude/skills/mppx && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "mppx" agent skill from https://github.com/internet-court/internet-court-skill/tree/main/vendored/tempo/mppx into .claude/skills/mppx/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mppx", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/internet-court/internet-court-skill/tree/main/vendored/tempo/mppx

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add internet-court/internet-court-skill --skill mppx -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install internet-court/internet-court-skill mppx --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/internet-court/internet-court-skill.git skills-src && mkdir -p .agents/skills && cp -r skills-src/vendored/tempo/mppx .agents/skills/mppx && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "mppx" agent skill from https://github.com/internet-court/internet-court-skill/tree/main/vendored/tempo/mppx into .agents/skills/mppx/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mppx", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add internet-court/internet-court-skill --skill mppx -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install internet-court/internet-court-skill mppx --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/internet-court/internet-court-skill.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/vendored/tempo/mppx .cursor/skills/mppx && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "mppx" agent skill from https://github.com/internet-court/internet-court-skill/tree/main/vendored/tempo/mppx into .cursor/skills/mppx/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mppx", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/internet-court/internet-court-skill.git --path vendored/tempo/mppx

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add internet-court/internet-court-skill --skill mppx -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install internet-court/internet-court-skill mppx --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/internet-court/internet-court-skill.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/vendored/tempo/mppx .gemini/skills/mppx && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "mppx" agent skill from https://github.com/internet-court/internet-court-skill/tree/main/vendored/tempo/mppx into .gemini/skills/mppx/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mppx", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install internet-court/internet-court-skill mppx

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add internet-court/internet-court-skill --skill mppx -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/internet-court/internet-court-skill.git skills-src && mkdir -p .github/skills && cp -r skills-src/vendored/tempo/mppx .github/skills/mppx && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "mppx" agent skill from https://github.com/internet-court/internet-court-skill/tree/main/vendored/tempo/mppx into .github/skills/mppx/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mppx", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add internet-court/internet-court-skill --skill mppx -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install internet-court/internet-court-skill mppx --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/internet-court/internet-court-skill.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/vendored/tempo/mppx .opencode/skills/mppx && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "mppx" agent skill from https://github.com/internet-court/internet-court-skill/tree/main/vendored/tempo/mppx into .opencode/skills/mppx/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mppx", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: mppx
GitHub stars: 6.6k
Used in: 1 other repo
Token cost: ~1.1k tokens
SKILL.md length: 311 words
Files: 2
Skills in repo: 80
Repo updated: Aug 19, 2026
First seen: Oct 7, 2026
Licence: Apache-2.0

At a glance

TypeScript SDK for the Payment HTTP Authentication Scheme. An agent skill from internet-court/internet-court-skill.

Integrating payments
SKILL.md covers What I can accomplish, Required inputs, Constraints and Client, plus 5 more sections
Calls npx; needs MPP_SECRET_KEY
Mppx into a client

What it does

Mppx is an agent skill from internet-court/internet-court-skill. TypeScript SDK for the Payment HTTP Authentication Scheme. Handles 402 Payment Required flows with Tempo, Stripe, and other payment methods. Use when integrating payments or mppx into a client or server application.

Its SKILL.md is about 1.1k tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file.

It sits in Backend & APIs. It works with Stripe, TypeScript and Circle USDC. The repository describes itself as: The trust layer for agent-to-agent commerce — natural-language mandates, ERC-7710 delegated permissions, x402 payments, escrow, and dispute resolution as one open, catch-all… The licence is Apache-2.0.

When your agent uses it

Integrating payments
Mppx into a client
Server application

Example prompts

“/mppx”

Requirements

Node.js
A credential in MPP_SECRET_KEY

What it can do on your machine

Read from SKILL.md and the folder at commit fa89195. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- npx
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
- mpp.dev
- github.com
- paymentauth.org
- docs.tempo.xyz
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names these keys or tokens, usually read from environment variables:
- MPP_SECRET_KEY
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Mppx loads about 1.1k tokens when it runs. Until then it costs about 55 tokens; SKILL.md has 311 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~55
When it runs · the whole SKILL.md, loaded when a task matches: ~1.1k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from internet-court/internet-court-skill at commit fa89195, republished under its Apache-2.0 licence (© internet-court). 311 words, ~1,070 tokens.

Download SKILL.mdSave it as .claude/skills/mppx/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.

name: mppx
description: TypeScript SDK for the Payment HTTP Authentication Scheme. Handles 402 Payment Required flows with Tempo, Stripe, and other payment methods. Use when integrating payments or mppx into a client or server application.

mppx

TypeScript SDK for the "Payment" HTTP Authentication Scheme. Full 402 flow: challenge → credential → receipt.

What I can accomplish

Add 402 payment handling to a client with Fetch.polyfill or Fetch.from.
Protect HTTP routes with server-side MPP Challenges and Receipt responses.
Accept one-time Tempo stablecoin payments with tempo.charge.
Accept metered Tempo stablecoin payments with tempo.session.
Accept one-time card payments with stripe.charge.
Verify Credentials directly for custom transports or background workflows.
Wrap MCP clients and servers so tool calls can require payment.

Required inputs

Client integrations need a signing account and one or more client payment methods.
Server integrations need a recipient, currency, amount, and MPP_SECRET_KEY.
Tempo examples use chain ID 4217 unless a page explicitly covers Moderato testnet.
Stripe examples need a configured Stripe account and Shared Payment Token flow.
MCP integrations need the MCP client or server object to wrap.

Constraints

Keep MPP_SECRET_KEY server-side and out of logs.
Never commit private keys or wallet seeds.
Treat runtime 402 Challenges as authoritative for current payment terms.
Return id and opaque unchanged when responding to a Challenge.
Use USDC.e for Tempo bridged USDC examples, not generic USDC.

Client

import { Mppx, tempo } from 'mppx/client'

// Polyfills globalThis.fetch to handle 402 automatically
Mppx.create({
  methods: [tempo({ account })],
})

const res = await fetch('https://api.example.com/resource')

Without polyfilling:

const mppx = Mppx.create({
  methods: [tempo({ account })],
  polyfill: false,
})

const res = await mppx.fetch('https://api.example.com/resource')

Server

import { Mppx, Store, tempo } from 'mppx/server'
import { privateKeyToAccount } from 'viem/accounts'

const account = privateKeyToAccount('0x...')

const mppx = Mppx.create({
  methods: [
    tempo.charge({ currency: '0x...', recipient: '0x...' }),
    tempo.session({
      account,
      chainId: 4217,
      currency: '0x...',
      store: Store.memory(),
    }),
  ],
  secretKey: process.env.MPP_SECRET_KEY,
})

async function handler(request: Request): Promise<Response> {
  const result = await mppx.charge({ amount: '1.00' })(request)
  if (result.status === 402) return result.challenge
  return result.withReceipt(Response.json({ data: '...' }))
}

Methods

Method	Intent	Description
`tempo.charge`	`charge`	One-time stablecoin payment (TIP-20 token transfer on Tempo)
`tempo.session`	`session`	Streaming payments via payment channels on Tempo
`stripe.charge`	`charge`	One-time payment via Stripe

tempo() returns [tempo.charge, tempo.session] as a tuple using the current v2 Sessions implementation. Use tempo.charge() or tempo.session() individually if you only need one intent. Use tempo.sessionLegacy only for Legacy Sessions v1 compatibility.

Exports

Path	Purpose
`mppx`	Core primitives (`Challenge`, `Credential`, `Method`, `Receipt`, `PaymentRequest`)
`mppx/client`	`Mppx`, `tempo`, `stripe`, `session`, `Transport`
`mppx/server`	`Mppx`, `tempo`, `stripe`, `Transport`, `Store`, `NodeListener`
`mppx/hono`	Hono middleware
`mppx/express`	Express middleware
`mppx/nextjs`	Next.js middleware
`mppx/elysia`	Elysia middleware

CLI

mppx includes a CLI for making paid requests during development:

npx mppx account create        # create wallet
npx mppx mpp.dev/api/ping/paid # make paid request
npx mppx example.com -v        # verbose output

References

Files

SKILL.md and 1 other file in vendored/tempo/mppx of internet-court/internet-court-skill.

SKILL.md
LICENSE

Open the folder on GitHubat commit fa89195

Used in 1 other repository

We found 2 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in internet-court/internet-court-skill, which our catalogue first saw on October 7, 2026.

aiskillstore/marketplaceskills/internet-court/mppx skills/internet-court/internet-court/vendored/tempo/mppx

Compare with similar skills

Mppx next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Mppx compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Mppx this skillinternet-court/internet-court-skill	6.6k	1 repos	~1.1k	Automated safety check: Pass	Apache-2.0	1 mo ago
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Payram Payment IntegrationPayRam/payram-mcp	158	—	~1.8k	Automated safety check: Pass	None	2 days ago
AlchemyBankrBot/skills	1.2k	—	~3.5k	Automated safety check: Pass	MIT	yesterday
SaaS Scaffolderborghei/Claude-Skills	891	—	~1.8k	Automated safety check: Pass	MIT	4 days ago
Payram Vs X402LeoYeAI/openclaw-master-skills	2.2k	—	~4.2k	Automated safety check: Pass	MIT	2 mo ago

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Works with

Questions about Mppx

What does Mppx do?

TypeScript SDK for the Payment HTTP Authentication Scheme. An agent skill from internet-court/internet-court-skill. Mppx is an agent skill from internet-court/internet-court-skill. TypeScript SDK for the Payment HTTP Authentication Scheme.

When should I use Mppx?

Mppx fits situations like: integrating payments; mppx into a client; server application.

How do I install Mppx in Claude Code?

Run `npx skills add internet-court/internet-court-skill --skill mppx -a claude-code`. Or copy the skill folder (vendored/tempo/mppx in internet-court/internet-court-skill) into .claude/skills/mppx in your project. Claude Code loads it when a task matches its description.

How do I install Mppx in Codex?

Run `npx skills add internet-court/internet-court-skill --skill mppx -a codex`. Or copy the skill folder (vendored/tempo/mppx in internet-court/internet-court-skill) into .agents/skills/mppx in your project. Codex loads it when a task matches its description.

Can I use Mppx in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add internet-court/internet-court-skill --skill mppx -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/mppx, .gemini/skills/mppx, .github/skills/mppx and .opencode/skills/mppx in your project.

What does Mppx need to run?

Going by SKILL.md and its folder, Mppx needs the command-line tools its instructions call (npx) and credentials named MPP_SECRET_KEY. Our summary lists: Node.js; A credential in MPP_SECRET_KEY.

Does Mppx access the network?

SKILL.md names 4 domains. As links in the text: mpp.dev, github.com, paymentauth.org and docs.tempo.xyz. This is read from the text; nothing was executed.

Is Mppx safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Mppx use?

Mppx is published under the Apache-2.0 licence (from the LICENSE file in the skill folder). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Mppx use?

About 1.1k tokens (SKILL.md is roughly 4.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Mppx?

Skills that share tags, products or a category with Mppx: Dinero Currency Patterns (dinerojs/dinero.js, 6.8k stars), Payram Payment Integration (PayRam/payram-mcp, 158 stars), Alchemy (BankrBot/skills, 1.2k stars) and SaaS Scaffolder (borghei/Claude-Skills, 891 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Mppx?

internet-court (a GitHub organization) maintains it in internet-court/internet-court-skill, which has 6,551 GitHub stars. The repository holds 80 skills in this directory. The repository was last updated on August 19, 2026.

Source: internet-court/internet-court-skill on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Mppx

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

mppx

What I can accomplish

Required inputs

Constraints

Client

Server

Methods

Exports

CLI

References

Files

Used in 1 other repository

Compare with similar skills

Similar skills

More from internet-court/internet-court-skill

Related

Questions about Mppx