space.weather

Current space weather from NOAA SWPC public feeds. Returns the latest planetary K-index (3-hour geomagnetic activity), solar wind plasma (density / speed / temperature from ACE/DSCOVR at L1), GOES X-ray flux with NOAA flare class (A/B/C/M/X), and the current NOAA R (radio blackout) / S (solar radiation) / G (geomagnetic storm) scales plus a 24-hour forecast in 6-hour windows. All timestamps are ISO 8601 UTC. No parameters. Useful for aurora forecasting, HF-radio propagation, satellite-operations planning, and GPS-degradation alerts. Data is public domain (NOAA / US government work).

price

$0.0010 USDC per call

method

GET/api/space/weather

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

Code samples

cURLbash

# 1. Probe with no auth → 402 envelope with PaymentRequirements
curl -sS 'https://2s.io/api/space/weather'

# 2. Sign + retry with PAYMENT-SIGNATURE:
curl -sS 'https://2s.io/api/space/weather' \
  -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/space/weather'

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.space.weather({})

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.space.weather()

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": "space.weather",
    "arguments": {}
  }
}

Response

Field	Type	Description
`kp`	object
`solarWind`	object
`xray`	object
`scales`	object
`source`	object

Example response datajson

{
  "kp": {
    "latest": {
      "time": "example",
      "kp": 1,
      "gScale": 1,
      "gLabel": "example"
    },
    "recent": [
      {
        "time": "example",
        "kp": 1,
        "gScale": 1,
        "gLabel": "example"
      }
    ]
  },
  "solarWind": {
    "time": "example",
    "densityPerCm3": 1,
    "speedKmPerSec": 1,
    "temperatureK": 1
  },
  "xray": {
    "time": "example",
    "fluxLongWm2": 1,
    "flareClass": "example",
    "satellite": 1
  },
  "scales": {
    "current": {
      "observedAt": "example",
      "rRadio": {
        "scale": 1,
        "label": "example"
      },
      "sRadiation": {
        "scale": 1,
        "label": "example"
      },
      "gGeomagnetic": {
        "scale": 1,
        "label": "example"
      }
    },
    "forecast": [
      {
        "startsAt": "example",
        "rMinorPercent": 1,
        "rMajorPercent": 1,
        "sPercent": 1,
        "gScale": 1,
        "gLabel": "example"
      }
    ]
  },
  "source": {
    "provider": "example",
    "url": "example",
    "license": "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.