Look up country metadata via REST Countries. Pass alpha2 (2-letter ISO 3166-1), alpha3 (3-letter), or name (with optional fullText=true for exact match). Returns common + official name, ISO codes, region + subregion, independence + UN-member flags, capital(s), population, area km², landlocked flag, neighboring borders (alpha-3), timezones, currencies (code → name + symbol), languages, calling code, flag emoji + SVG/PNG URLs, lat/lng coordinates, Google Maps + OSM URLs, driving side, top-level domains.
/api/country/lookupPAYMENT-SIGNATURE.The lookup API is a pay-per-call country endpoint built for AI agents and autonomous software. Look up country metadata via REST Countries.
There is no signup and no API key. An agent (or any HTTP client) hits the endpoint, receives an x402 "402 Payment Required" challenge, signs a sub-cent USDC payment on Base or Solana, and retries — the data comes back on the paid request. That makes it a drop-in lookup data source for an agent tool-use loop, an MCP host, or a backend that needs country data on demand without onboarding to yet another vendor portal.
| Name | Type | Description |
|---|---|---|
alpha2 | string | min 2 chars · max 2 chars · match ^[A-Za-z]{2}$ |
alpha3 | string | min 3 chars · max 3 chars · match ^[A-Za-z]{3}$ |
name | string | min 2 chars · max 80 chars |
fullText | boolean |
# 1. Probe with no auth → 402 envelope with PaymentRequirements curl -sS 'https://2s.io/api/country/lookup?alpha2=xx&alpha3=xxx&name=xx&fullText=false' # 2. Sign + retry with PAYMENT-SIGNATURE: curl -sS 'https://2s.io/api/country/lookup?alpha2=xx&alpha3=xxx&name=xx&fullText=false' \ -H 'PAYMENT-SIGNATURE: <base64-json-payload>' # Or use the canonical runner (handles probe → sign → retry): # EVM_PRIVATE_KEY=0x... node --env-file=.env.local \ # --experimental-strip-types scripts/x402-pay.ts \ # 'https://2s.io/api/country/lookup?alpha2=xx&alpha3=xxx&name=xx&fullText=false'
import { TwoS } from '@2sio/sdk'
const client = new TwoS({
privateKey: process.env.EVM_PRIVATE_KEY as `0x${string}`,
})
const result = await client.country.lookup({
"alpha2": "xx",
"alpha3": "xxx",
"name": "xx",
"fullText": false
})
console.log('endpoint:', result.endpoint)
console.log('cost:', result.costUsd, 'USDC')
console.log('tx:', result.settlement?.txHash)
console.log('data:', result.data)import os
from twosio import TwoS
client = TwoS(private_key=os.environ["EVM_PRIVATE_KEY"])
result = client.country.lookup(alpha2="xx", alpha3="xxx", name="xx", fullText=False)
print("endpoint:", result.endpoint)
print("cost:", result.cost_usd, "USDC")
print("tx:", (result.settlement or {}).get("tx_hash"))
print("data:", result.data)// 1. Add @2sio/mcp to your MCP host config (Claude Desktop example below).
// EVM_PRIVATE_KEY funds x402 payments per call.
// claude_desktop_config.json
{
"mcpServers": {
"2sio": {
"command": "npx",
"args": ["-y", "@2sio/mcp"],
"env": { "EVM_PRIVATE_KEY": "0x..." }
}
}
}
// 2. Once the server is running, agents call this tool via standard MCP:
{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/call",
"params": {
"name": "country.lookup",
"arguments": {
"alpha2": "xx",
"alpha3": "xxx",
"name": "xx",
"fullText": false
}
}
}| Field | Type | Description |
|---|---|---|
ok | boolean | one of: true |
items | array | |
total | integer | Total matching rows upstream; null when unknown. |
source | object | |
meta | object |
{
"ok": true,
"items": [
{
"name": {
"common": "example",
"official": "example"
},
"alpha2": "example",
"alpha3": "example",
"numericCode": "example",
"cioc": "example",
"region": "example",
"subregion": "example",
"independent": false,
"unMember": false,
"capital": [
"example"
],
"population": 1,
"areaKm2": 1,
"landlocked": false,
"borders": [
"example"
],
"timezones": [
"example"
],
"currencies": {},
"languages": {},
"callingCode": "example",
"flag": "example",
"flagSvg": "example",
"flagPng": "example",
"coordinates": {
"lat": 1,
"lng": 1
},
"googleMapsUrl": "example",
"openStreetMapsUrl": "example",
"drivingSide": "example",
"tld": [
"example"
]
}
],
"total": 1,
"source": {
"provider": "example",
"url": "example",
"license": "example"
},
"meta": {
"query": {
"alpha2": "example",
"alpha3": "example",
"name": "example",
"fullText": false
}
}
}