Unified read API over US National Park Service developer.nps.gov. Pick a resource: parks (every NPS unit — historical parks, monuments, seashores, etc.), alerts (closures, dangers, info), campgrounds (NPS-operated campgrounds with reservation links), events (talks, walks, ranger programs), newsreleases (park news), thingstodo (activities by park), visitorcenters. Filter by parkCode (CSV — e.g. "acad,yose,grca"), state, or free-text query. Returns the upstream NPS payload verbatim (rich nested objects with images, addresses, operating hours, etc.).
/api/park/lookupPAYMENT-SIGNATURE.The lookup API is a pay-per-call park endpoint built for AI agents and autonomous software. Unified read API over US National Park Service developer.nps.gov.
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 park data on demand without onboarding to yet another vendor portal.
| Name | Type | Description |
|---|---|---|
resourcerequired | string | one of: parks | alerts | campgrounds | events | newsreleases | thingstodo | visitorcenters |
parkCode | string | match ^[a-z]{2,4}(,[a-z]{2,4})*$ |
state | string | min 2 chars · max 2 chars · match ^[A-Za-z]{2}$ |
q | string | min 1 chars · max 120 chars |
limit | integer | min 1 · max 50 |
start | integer | min 0 |
# 1. Probe with no auth → 402 envelope with PaymentRequirements curl -sS 'https://2s.io/api/park/lookup?resource=parks&parkCode=example&state=xx&q=example&limit=10&start=0' # 2. Sign + retry with PAYMENT-SIGNATURE: curl -sS 'https://2s.io/api/park/lookup?resource=parks&parkCode=example&state=xx&q=example&limit=10&start=0' \ -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/park/lookup?resource=parks&parkCode=example&state=xx&q=example&limit=10&start=0'
import { TwoS } from '@2sio/sdk'
const client = new TwoS({
privateKey: process.env.EVM_PRIVATE_KEY as `0x${string}`,
})
const result = await client.park.lookup({
"resource": "parks",
"parkCode": "example",
"state": "xx",
"q": "example",
"limit": 10,
"start": 0
})
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.park.lookup(resource="parks", parkCode="example", state="xx", q="example", limit=10, start=0)
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": "park.lookup",
"arguments": {
"resource": "parks",
"parkCode": "example",
"state": "xx",
"q": "example",
"limit": 10,
"start": 0
}
}
}| 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": [
{}
],
"total": 1,
"source": {
"provider": "example",
"url": "example",
"license": "example"
},
"meta": {
"resource": "parks",
"limit": 1,
"start": 1
}
}