US energy benchmark prices from the EIA (Energy Information Administration) open data API. Omit series for a one-call snapshot of the latest value of every benchmark; pass series for its recent time series (newest first). Benchmarks: wti_crude / brent_crude ($/barrel), henry_hub_gas ($/MMBtu), gasoline_regular / diesel ($/gallon), electricity_retail (cents/kWh). Each observation has date, value, units, and frequency. Public-domain US government data.
/api/energy/pricesPAYMENT-SIGNATURE.The prices API is a pay-per-call energy endpoint built for AI agents and autonomous software. US energy benchmark prices from the EIA (Energy Information Administration) open data API.
There is no signup and no API key. An agent (or any HTTP client) hits the endpoint, receives an x402 "402 Payment Required" challenge, signs a sub-cent USDC payment on Base or Solana, and retries — the data comes back on the paid request. That makes it a drop-in prices data source for an agent tool-use loop, an MCP host, or a backend that needs energy data on demand without onboarding to yet another vendor portal.
| Name | Type | Description |
|---|---|---|
series | string | Optional benchmark id. Omit for a snapshot of all benchmarks. One of: wti_crude, brent_crude, henry_hub_gas, gasoline_regular, diesel, electricity_retail. one of: wti_crude | brent_crude | henry_hub_gas | gasoline_regular | diesel | electricity_retail |
limit | integer | Observations to return in single-series mode (1-100). Default 12. Ignored in snapshot mode. min 1 · max 100 |
# 1. Probe with no auth → 402 envelope with PaymentRequirements curl -sS 'https://2s.io/api/energy/prices?series=wti_crude&limit=12' # 2. Sign + retry with PAYMENT-SIGNATURE: curl -sS 'https://2s.io/api/energy/prices?series=wti_crude&limit=12' \ -H 'PAYMENT-SIGNATURE: <base64-json-payload>' # Or use the canonical runner (handles probe → sign → retry): # EVM_PRIVATE_KEY=0x... node --env-file=.env.local \ # --experimental-strip-types scripts/x402-pay.ts \ # 'https://2s.io/api/energy/prices?series=wti_crude&limit=12'
import { TwoS } from '@2sio/sdk'
const client = new TwoS({
privateKey: process.env.EVM_PRIVATE_KEY as `0x${string}`,
})
const result = await client.energy.prices({
"series": "wti_crude",
"limit": 12
})
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.energy.prices(series="wti_crude", limit=12)
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": "energy.prices",
"arguments": {
"series": "wti_crude",
"limit": 12
}
}
}| 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": [
{
"series": "example",
"label": "example",
"date": "example",
"value": 1,
"units": "example",
"frequency": "example"
}
],
"total": 1,
"source": {
"provider": "example",
"url": "example",
"license": "example"
},
"meta": {
"mode": "snapshot",
"query": {
"series": "example",
"limit": 1
}
}
}