US mortality statistics from CDC NCHS. dataset=leading-causes (default): annual deaths + age-adjusted death rate per 100k by state and top-10 cause of death, 1999-2017 — filter by state (full name, e.g. "California", or "United States"), year, cause (e.g. "Heart disease", "Cancer", "Suicide"). dataset=weekly-counts: provisional weekly death counts by jurisdiction with per-cause columns (all-cause, natural, COVID-19, heart disease, cancer, etc.), 2020-2023 — filter by state and mmwrYear. Rows returned raw from CDC with documented column names. Public-domain federal data.
/api/health/mortality-statsPAYMENT-SIGNATURE.The mortality stats API is a pay-per-call health endpoint built for AI agents and autonomous software. US mortality statistics from CDC NCHS.
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 mortality stats data source for an agent tool-use loop, an MCP host, or a backend that needs health data on demand without onboarding to yet another vendor portal.
| Name | Type | Description |
|---|---|---|
dataset | string | one of: leading-causes | weekly-counts |
state | string | min 2 chars · max 40 chars |
year | integer | min 1999 · max 2023 |
cause | string | min 2 chars · max 80 chars |
limit | integer | min 1 · max 200 |
offset | integer | min 0 |
# 1. Probe with no auth → 402 envelope with PaymentRequirements curl -sS 'https://2s.io/api/health/mortality-stats?dataset=leading-causes&state=xx&year=1999&cause=xx&limit=25&offset=0' # 2. Sign + retry with PAYMENT-SIGNATURE: curl -sS 'https://2s.io/api/health/mortality-stats?dataset=leading-causes&state=xx&year=1999&cause=xx&limit=25&offset=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/health/mortality-stats?dataset=leading-causes&state=xx&year=1999&cause=xx&limit=25&offset=0'
import { TwoS } from '@2sio/sdk'
const client = new TwoS({
privateKey: process.env.EVM_PRIVATE_KEY as `0x${string}`,
})
const result = await client.health.mortalityStats({
"dataset": "leading-causes",
"state": "xx",
"year": 1999,
"cause": "xx",
"limit": 25,
"offset": 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.health.mortality_stats(dataset="leading-causes", state="xx", year=1999, cause="xx", limit=25, offset=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": "health.mortality-stats",
"arguments": {
"dataset": "leading-causes",
"state": "xx",
"year": 1999,
"cause": "xx",
"limit": 25,
"offset": 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": {
"dataset": "leading-causes"
}
}