K-AgentPay: Korea travel & K-pop data

Name: K-AgentPay: Korea travel & K-pop data
Author: k-agentpay

by k-agentpayversion 0.3.1i★ –iRuns in the cloud

Registry namecom.k-agentpay/kaia-x402

Install

Overview

Description from the maker (original English)

Korea travel & K-pop live data for agents: concerts, Seoul trip packs, crowd, subway, airport.

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: Travel, maps & weather

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 9 things (tools) kpop_search, seoul_places, request_korea_data, incheon_airport_wait …
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?

ClaudeClaude CodeCursorVS CodeChatGPT

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://api.k-agentpay.com/mcp

Run this in your terminal

claude mcp add --transport http kaia-x402 https://api.k-agentpay.com/mcp

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "kaia-x402": {
      "url": "https://api.k-agentpay.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.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "kaia-x402": {
      "type": "http",
      "url": "https://api.k-agentpay.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://api.k-agentpay.com/mcp

Menu 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 8, 2026. The maker wrote them, not us; we show them as plain text.

kpop_search
Free. Search K-pop / pop concerts in Korea for the next 6 months by artist or title (any language). Returns concert ids.
seoul_places
Free. The 121 Seoul places (with codes) accepted by seoul_now.
request_korea_data
Free. Ask for Korea data these tools don't cover yet; the most requested is added first.
incheon_airport_wait
Live Incheon Airport departure-hall waiting minutes and queue per hall (T1/T2) and the shortest hall. 10 free calls/day.
seoul_subway_now
Next trains at a Seoul subway station right now (station in English, Japanese or Korean). 10 free calls/day.
seoul_now
Live crowd level, 12-hour crowd forecast and weather for a Seoul place (e.g. Myeongdong, Hongdae). 10 free calls/day.
kpop_new_concerts
Concerts in Korea newly registered or updated since a date (YYYYMMDD, default 7 days), optional artist. 10 free calls/day.
korea_festivals
Festivals and events in Korea from a date (YYYYMMDD). 10 free calls/day.
seoul_trip_pack
Seoul concert trip pack (tickets, venue, last trains, crowd, hotels/food nearby) — paid only: returns how to buy it.

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 against the domain k-agentpay.com (the registry checks domain ownership)
… 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 606 ms (HTTP 200)
– Not applicable
Sign-in with OAuth
No sign-in needed
✓ Pass
No hidden instructions in tool descriptions
Read 9 tool descriptions and found no hidden instructions to the AI

Compared with others in Travel, maps & weatheri

More stars than 0% of the other 1722 servers in this category
Published to the registry more recently than 55% of the other 1722 servers in this category
Basic checks equal to or better than 100% of the other 1722 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 K-AgentPay: Korea travel & K-pop data 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 (0.3.1) reached the registry 24 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: topo^alpin, Openvan Travel, Matryoshka Mind Map

Alternatives

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Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

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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.

kaia-x402

x402 payments on Kaia. AI agents pay per request in JPYC or USDT on Kaia: no account, no API key, and no KAIA needed by the buyer.

x402 v2, network eip155:8217, headers PAYMENT-REQUIRED / PAYMENT-SIGNATURE / PAYMENT-RESPONSE (v1 X-PAYMENT still accepted).
Standard-compatible for JPYC: the official x402 v2 client (@x402/fetch + @x402/evm) pays this server unmodified — see examples/official_client.mjs. The official client only allows its default assets (e.g. USDC) unless told otherwise, so allow JPYC on Kaia in its config:

  spendControls: { allowedAssets: [{ network: "eip155:8217", asset: "0xe7c3d8c9a439fede00d2600032d5db0be71c3c29", maxAmountPerPayment: "100000000000000000000" }] } // ¥100 cap

Live service built on this repo: https://api.k-agentpay.com (catalog at /v1). Every endpoint takes lang=ja (default) | en | ko; the MCP tools pass the user's language.

Buying data (people and their AI agents)

The steps to buy from the live service. The *Quick start* further down (keys.mjs, facilitator.mjs, server.mjs) is for sellers running their own API; buyers do not need it.

Install: npm install
Find the concert id (free, no payment): node client.mjs "https://api.k-agentpay.com/v1/kpop/search?q=EVNNE"
Buy the trip pack (¥50, paid in JPYC on Kaia): node client.mjs "https://api.k-agentpay.com/v1/seoul/trip-pack?id= " Add &lang=en or &lang=ko for English or Korean (default Japanese).
client.mjs prints wallet: 0x… first. If that wallet has no balance, it says so; the wallet owner decides whether to fund it with JPYC on Kaia (a few hundred yen covers several purchases). No KAIA is needed for gas. After funding, step 3 can be run again.

Safety notes:

The wallet key is created at ~/.kaia-x402/buyer.key (or $KAIA_X402_HOME/buyer.key). Run this on your own computer. In temporary cloud environments (e.g. Claude Code on the web) the key disappears when the session ends, together with any funds sent to it.
Spending limits: ¥100 per payment and ¥300 per day by default (MAX_CALL_YEN, MAX_DAY_YEN). They are computed from the amount actually signed (USDT is converted at our own ECB-based rate; a server's own price label can only raise it), each signed payment counts toward the day as soon as it is sent, and every signature expires within 2 minutes.
Only send a small amount: this wallet is for small per-request payments.

This repo contains:

a Kaia x402 facilitator (/verify, /settle, /supported) for the exact scheme, which pays the gas itself (logic in facilitator_core.mjs):
JPYC via EIP-3009 transferWithAuthorization (one tx) — the standard x402 exact EVM method;
USDT via EIP-2612 permit + transferFrom (two txs; spender = the facilitator, allowance = the price). Non-standard extension: Kaia USDT has no EIP-3009, and the x402 Permit2 proxy (0x402085c2…20001) is not deployed on Kaia yet (Permit2 itself is). Official clients will pick the JPYC option;
an example paid API (server.mjs, sample data in examples/): a free search and a ¥50 *ソウル遠征パック* (Seoul concert trip pack for Japanese fans);
a buyer library with wallet guardrails, and MCP tools so any MCP-capable agent (Claude, Cursor, …) pays automatically.

agent ──GET /v1/seoul/trip-pack?id=…──▶ API   ◀── 402 Payment Required  (accepts: JPYC ¥50 | USDT $0.32, payTo)

agent signs a JPYC authorization (EIP-3009) or a USDT permit (EIP-2612), gasless for the agent agent ──GET + X-PAYMENT──▶ API ──verify / settle──▶ facilitator ──▶ funds move on Kaia agent ◀── 200 + data + X-PAYMENT-RESPONSE (tx hash)

Data is returned only after the payment has settled. If the upstream data fails, or the request is invalid (e.g. unknown id), the buyer is not charged. A payment payload is served at most once.

Settlement edge cases: a transfer that was broadcast but has no receipt within 45 s is treated as settled (the signature and balance were verified), the data is returned, and the final outcome is confirmed in the background. Every attempt is written to data/settlements.jsonl (settled, reverted, pending → pending_settled / pending_reverted). refund.mjs sends a manual refund from the seller, gasless for the seller (dry run by default, --live to send).

Live on Kaia mainnet

Payments on 2026-10-14 (the buyer held 0 KAIA for the JPYC payments):

What was bought	Paid	Tx
Seoul concert trip pack (Japanese)	¥50 JPYC	0x004de750…
Seoul concert trip pack (Japanese)	$0.32 USDT	0xb0d30aad…
Seoul pop concerts	¥3 JPYC	0x6adc96bd…
Korea festivals (Japanese)	¥3 JPYC	0xe40c3fe7…

Settlement gas, paid by the facilitator: JPYC ≈ 81k gas (≈ 0.002 KAIA); USDT ≈ 71k + 49–66k gas (≈ 0.003 KAIA).

Token facts (verified on Kaia mainnet)

Token	Address	Gasless method	EIP-712 domain
JPYC	`0xe7c3d8c9a439fede00d2600032d5db0be71c3c29` (18 dp)	EIP-3009 `transferWithAuthorization`	name `JPY Coin`, version `1`, chainId `8217`
USDT	`0xd077a400968890eacc75cdc901f0356c943e4fdb` (6 dp)	EIP-2612 `permit` (no EIP-3009)	name `Tether USD`, version `1`, chainId `8217` (matches `DOMAIN_SEPARATOR()`)

USDT payment payload (our extension of exact for permit-only tokens): payload = { signature, permit: { owner, spender, value, nonce, deadline } }, where spender is extra.spender from the 402 response. The facilitator moves exactly value to payTo.

Example API

Endpoint	Price	Returns
`GET /v1/kpop/search?q=`	free	concerts matching an artist or title, with ids (the discovery step)
`GET /v1/seoul/trip-pack?id=`	¥50	Japanese trip pack: schedule, seat prices in yen, ticket sellers, venue + map link, nearby hotels/food/spots
`GET /v1`, `GET /.well-known/x402`	free	machine-readable catalog

The example serves one sample concert (examples/trip_pack_sample.json); replace the handlers with your own data. paid(describe, handler, priceYen) is the reusable part: it returns 402 with both payment options, verifies, runs the handler, settles, and only then returns the data.

Prices are set in yen. The USDT price is the yen price converted at the ECB euro reference rates (daily), rounded up to the cent.

Quick start (sellers: run your own paid API)

npm install

node keys.mjs # creates facilitator / seller / buyer keys in secrets/ (prints addresses only)

fund the buyer with a little JPYC or USDT on Kaia, the facilitator with a little KAIA (gas)

node facilitator.mjs & # 127.0.0.1:8402 node server.mjs & # 127.0.0.1:8403 node client.mjs # pays the example trip pack

Environment: KAIA_RPC_URL (default https://public-en.node.kaia.io), PRICE_YEN (3), PACK_YEN (50), PUBLIC_BASE (public URL used in the 402 resource), PAY_TO (payTo address; the seller key is then not needed on the server).

Use it from an agent (MCP)

One-click (Claude Desktop): download kaia-x402-mcp.mcpb from the latest release and open it.

MCP Registry name: mcp-name: com.k-agentpay/kaia-x402

The MCP server runs next to the agent, with the agent's own wallet:

"mcpServers": { "kculture-x402": { "command": "node", "args": ["/path/to/kaia-x402/mcp.mjs"], "env": { "API_BASE": "https://api.k-agentpay.com" } } } }

Wallet: KAIA_X402_KEY_FILE, else secrets/buyer.key in this checkout, else ~/.kaia-x402/buyer.key (created on first use, mode 0600). Call wallet_info to see the address and balances, then send it JPYC or USDT on Kaia.
PAY_ASSET: auto (default: JPYC when the balance covers the price, else USDT), JPYC or USDT.
Limits: MAX_CALL_YEN (100) and MAX_DAY_YEN (300). The daily budget is reserved before each payment, so parallel tool calls cannot overshoot it.

API_BASE defaults to the live service https://api.k-agentpay.com.

Tools: wallet_info (free), kpop_search(q) (free), seoul_places() (free), request_korea_data(want) (free: ask for Korea data we don't have yet), seoul_trip_pack(id), kpop_new_concerts(q?, since?), seoul_now(place), seoul_subway_now(station), incheon_airport_wait(), kpop_concerts(from?, to?), korea_festivals(lang, from?). Each paid call returns the data with the payment tx. (The example server implements kpop_search and seoul_trip_pack; the hosted K-culture service implements all of them.)

Missing some Korea data?

Open a data request, or let your agent call GET https://api.k-agentpay.com/v1/request?want=... (free) / the MCP tool request_korea_data. The most requested data is built first.

Deploy

deploy/push.sh copies the app to a fresh Amazon Linux 2023 host and runs deploy/setup_server.sh: Node, systemd units for the facilitator (private, 127.0.0.1) and the API, and Caddy for HTTPS. Only the facilitator gas key (plus any files in DEPLOY_SECRETS) goes to the host; payTo is an address.

HOST=<ip> DOMAIN=<api host> SSH_KEY=~/.ssh/<key> bash deploy/push.sh

Tests

npm test — offline facilitator tests (stubbed chain): valid v1/v2 payloads; rejects wrong recipient, low amount, expired / not-yet-valid authorization, forged signature, used nonce, insufficient balance, wrong network, unsupported asset, replay; USDT permit spender / nonce / deadline; pending settlement.
node examples/official_client.mjs — pays a running server with the official x402 v2 client (real funds).
test/ also runs the full flow on a local Hardhat fork of Kaia mainnet against the real JPYC contract (test/fund_fork.mjs funds the demo wallets on the fork only).

License

MIT

K-AgentPay: Korea travel & K-pop data

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Travel, maps & weatheri

Common questions

Alternatives

topo^alpin

Openvan Travel

Matryoshka Mind Map

README from the maker

kaia-x402

Buying data (people and their AI agents)

Live on Kaia mainnet

Token facts (verified on Kaia mainnet)

Example API

Quick start (sellers: run your own paid API)

fund the buyer with a little JPYC or USDT on Kaia, the facilitator with a little KAIA (gas)

Use it from an agent (MCP)

Missing some Korea data?

Deploy

Tests

License