climate.station-history

Historical daily weather observations from NOAA GHCN-Daily for one station and date range (up to 366 days per call): max/min/avg temperature (°C), precipitation (mm), snowfall and snow depth (mm), wind (m/s). Coverage reaches back to the 1800s for long-running stations — actual measured values for "what was the weather on this date", not model recall. Pass a GHCN station id (e.g. USW00094728 = NYC Central Park); find the nearest station for any coordinate with /api/climate/station-near first. dataTypes selects elements (default TMAX,TMIN,PRCP). NOAA public-domain data.

price

$0.0012 USDC per call

method

GET/api/climate/station-history

payment

x402 v2 · USDC on Base (EIP-3009) or Solana (SPL transfer)

auth

None. Sign the payment, retry with PAYMENT-SIGNATURE.

tier

Tier 0 — no paid upstream

Parameters

Name	Type	Description
`station`required	string	GHCN-Daily station id (11 chars). Find one with /api/climate/station-near. match ^[A-Z0-9]{11}$
`startDate`required	string	match ^\d{4}-\d{2}-\d{2}$
`endDate`required	string	match ^\d{4}-\d{2}-\d{2}$
`dataTypes`		Comma-separated element codes (TMAX, TMIN, TAVG, PRCP, SNOW, SNWD, AWND, WSF2, WSF5, EVAP). Default TMAX,TMIN,PRCP.

Code samples

cURLbash

# 1. Probe with no auth → 402 envelope with PaymentRequirements
curl -sS 'https://2s.io/api/climate/station-history?station=example&startDate=2024-01-01&endDate=2024-01-01&dataTypes=TMAX%2CTMIN%2CPRCP'

# 2. Sign + retry with PAYMENT-SIGNATURE:
curl -sS 'https://2s.io/api/climate/station-history?station=example&startDate=2024-01-01&endDate=2024-01-01&dataTypes=TMAX%2CTMIN%2CPRCP' \
  -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/climate/station-history?station=example&startDate=2024-01-01&endDate=2024-01-01&dataTypes=TMAX%2CTMIN%2CPRCP'

TypeScript / Node — @2sio/sdktypescript

import { TwoS } from '@2sio/sdk'

const client = new TwoS({
  privateKey: process.env.EVM_PRIVATE_KEY as `0x${string}`,
})

const result = await client.climate.stationHistory({
  "station": "example",
  "startDate": "2024-01-01",
  "endDate": "2024-01-01",
  "dataTypes": "TMAX,TMIN,PRCP"
})

console.log('endpoint:', result.endpoint)
console.log('cost:', result.costUsd, 'USDC')
console.log('tx:', result.settlement?.txHash)
console.log('data:', result.data)

Python — 2siopython

import os
from twosio import TwoS

client = TwoS(private_key=os.environ["EVM_PRIVATE_KEY"])

result = client.climate.station_history(station="example", startDate="2024-01-01", endDate="2024-01-01", dataTypes="TMAX,TMIN,PRCP")

print("endpoint:", result.endpoint)
print("cost:", result.cost_usd, "USDC")
print("tx:", (result.settlement or {}).get("tx_hash"))
print("data:", result.data)

MCP — Claude Desktop / AgentKit / any MCP hostjson

// 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": "climate.station-history",
    "arguments": {
      "station": "example",
      "startDate": "2024-01-01",
      "endDate": "2024-01-01",
      "dataTypes": "TMAX,TMIN,PRCP"
    }
  }
}

Response

Field	Type	Description
`station`	string
`stationName`	string
`startDate`	string
`endDate`	string
`dataTypes`	array
`count`	number	Days with at least one reported value in range.
`observations`	array
`source`	object

Example response datajson

{
  "station": "example",
  "stationName": "example",
  "startDate": "example",
  "endDate": "example",
  "dataTypes": [
    "example"
  ],
  "count": 1,
  "observations": [
    {
      "date": "example",
      "values": {}
    }
  ],
  "source": {
    "provider": "example",
    "url": "example"
  }
}

Discovery

/api/directory — full catalog of every endpoint
/openapi.json — OpenAPI 3.1 spec (per-op x-payment-info, x402Payment security)
/.well-known/x402 — machine-readable service descriptor for x402-aware crawlers
/.well-known/mcp/server-card.json — MCP SEP-1649 server card
/llms.txt — plain-text manifest for LLM ingestion

2s.io is x402-native. Every call is paid per-request from a USDC-funded EVM wallet on Base — no signup, no API keys, no monthly fees. Source code: github.com/2s-io/sdk.