Spree Commerce: open-source B2B and marketplace ecommerce
Open-source B2B and marketplace ecommerce; new stores include an MCP server for AI agents.
Runs in the cloud
x402 Preflight
Overview
Description from the maker (original English)
Check an x402 endpoint's payment challenge and discovery metadata before paying.
PopNx MCP’s three pillars
These three are never merged into one score: opinions, measurements and popularity are different things.
- User voiceiNo reviews yetReviews open together with accounts in a later step
- Our basic checksi3 of 3 passedChecked from public information; code not scanned yet
- UsageiVery new★ –
What you can do with it
We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.
- Connection: Runs in the cloud
- Transport: Streamable HTTP
- Category: Online shops & payments
Install
Pick the AI app you use, then copy the settings.
Before you install
- Basic checks: 3 of 3 passed
- Runs on the maker’s server: what you ask it goes through their server.
- Can do 3 things (tools) inspect_x402_endpoint, audit_x402_endpoint, order_x402_remediation
- The registry lists no key to fill in.
You need
- Runs in the cloudNothing to install; it connects over the internet
Which app do you use?
Pick your app above. We remember it, so next time the button says “Install in …”.
Works in Claude on the web, desktop and mobile:
- Open Settings → Connectors
- Press Add custom connector
- Paste the address below and press Add
- If it asks you to sign in, sign in with the maker
https://x402.chikocorp.com/mcpRun this in your terminal
claude mcp add --transport http x402-preflight https://x402.chikocorp.com/mcpOr copy the settings yourself
Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"x402-preflight": {
"url": "https://x402.chikocorp.com/mcp"
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
Or copy the settings yourself
Paste into .vscode/mcp.json in your project
{
"servers": {
"x402-preflight": {
"type": "http",
"url": "https://x402.chikocorp.com/mcp"
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
ChatGPT connects only to servers on the internet:
- Open ChatGPT on the web → Settings → Connectors (Apps)
- Press Create or Add (some plans need Developer mode under Advanced first)
- Paste the address below, give it a name and save
- If it asks you to sign in, sign in with the maker
https://x402.chikocorp.com/mcpMenu names can differ slightly by plan and over time.
Your choice stays on this device in a cookie; no account needed.
These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
What it can do
Tool names and descriptions exactly as the server reported them on Nov 6, 2026. The maker wrote them, not us; we show them as plain text.
inspect_x402_endpointFree endpoint check for API developers launching or debugging x402. Inspect your live payment challenge and caller-selected comparison policy without sending payment credentials. ALLOW and BLOCK are policy decisions, not launch certification; a price-limit BLOCK does not establis
audit_x402_endpointTechnical audit for API developers launching or debugging x402. Returns deeper read-only evidence of payment configuration, schemas, redirects, CORS, cache behavior, OpenAPI, llms.txt, agent metadata, and x402 discovery consistency. Requires an explicitly authorized x402 purchase
order_x402_remediationDiagnostic report for API developers launching or debugging x402. An explicitly authorized x402 purchase creates a durable order for asynchronous findings, evidence, and prioritized fix recommendations in JSON/Markdown. The receipt is not the completed report. No implementation,
Basic checksi
We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 8, 2026
- ✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account chico10117, which owns the repo
- … Not checked yet
Still maintained
We have not read this repo from GitHub yet
- … Not checked yet
Has a licence
We have not read this repo from GitHub yet
- ✓ Pass
Endpoint responds
Responded in 2121 ms (HTTP 200)
- – Not applicable
Sign-in with OAuth
No sign-in needed
- ✓ Pass
No hidden instructions in tool descriptions
Read 3 tool descriptions and found no hidden instructions to the AI
Compared with others in Online shops & paymentsi
- More stars than 0% of the other 2548 servers in this category
- Published to the registry more recently than 89% of the other 2548 servers in this category
- Basic checks equal to or better than 100% of the other 2548 servers in this category
Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.
Common questions
Is x402 Preflight safe?
It passed 3 of 3 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.
What keys or codes does it need?
The registry does not list a required key, though some servers ask you to sign in on first use.
Does it run on my computer or in the cloud?
It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.
Is it still maintained?
The GitHub repo last changed –, and the latest version (1.0.2) reached the registry 2 days ago.
Which apps can use it?
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.
What can I use instead?
In the same category: Spree Commerce: open-source B2B and marketplace ecommerce, Stripe MCP, MCP Cn Commerce
Alternatives
Servers in the same category from other makers, sorted by stars.
Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
Stripe MCP
Stripe’s official server lets AI view and manage customers, products, payments and invoices. Connect to Stripe’s cloud and sign in with OAuth.
Runs in the cloud✓ stripe.com
MCP Cn Commerce
8 read-only MCP platform entries; support is operation-specific; merchant live acceptance pending
Runs on your computer
README from the maker
Open the README
Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.
x402 Preflight — public documentation
Documentation only. This repository holds the public, citable material for x402 Preflight, a read-only launch-diagnostics service for x402 endpoints (https://x402.chikocorp.com).
The service code is private; nothing in this repository is required to run it, and no payment logic, credentials or infrastructure configuration belongs here.
What the service does
It reads the live 402 challenge your endpoint serves and compares it with what the endpoint advertises — price, network, asset, receiver, scheme — plus discovery metadata, input schemas, CORS, redirects and cache behaviour, and returns findings with evidence. It never connects a wallet, signs nothing, and makes no purchase on the target.
Free check (no account, no wallet)
curl -s -X POST https://x402.chikocorp.com/api/preflight/inspect \-H 'content-type: application/json' \ -d '{"resource_url":"https://your-api.example.com/resource","method":"GET"}'
Machine-readable manifests
Everything a registry, directory or agent needs to index this server without filling a form:
| file | for |
|---|---|
| server.json | official MCP registry manifest (streamable HTTP remote) |
| glama.json | Glama maintainer claim |
| SKILL.md | agent skill: tools, inputs, prices and boundaries |
| gemini-extension.json | Gemini CLI extension pointing at https://x402.chikocorp.com/mcp |
Live equivalents served by the service: /llms.txt, /mcp and /.well-known/x402.json.
Contents
- docs/ — short answers: what x402 is, how to add it, and how to tell whether an endpoint really charges.
- guides/x402scan-discovery.md — discovery requirements for catalogue listings (OpenAPI as the canonical contract).
- guides/bazaar-listing-verification.md — how a Bazaar listing is verified and what the catalogue evidence says.
- reference/ — mirrors of the live public artifacts (
llms.txt,openapi.json).
Canonical source
The rendered pages live at https://x402.chikocorp.com/docs/. If this repository and the site disagree, the live service wins — the runtime 402 is the authoritative contract.
Contributing
Corrections and additions are welcome: see CONTRIBUTING.md. Keep claims verifiable — a finding without a reproducible command is not documentation.
Contact
admin@chikocorp.com