EPA Facility Registry Service (FRS) — every regulated facility known to the EPA across all programs (RCRA hazardous waste, NPDES water discharge, SDWA drinking water, TRI toxic release, CAA Clean Air, Superfund, etc.). Filter by state (required), facility name prefix, and EPA program acronym. Each record includes registry ID, primary name, address, city/state/county/zip, EPA region, program system + ID, source-of-data system. Public-domain US government records.
/api/gov/epa-facilitiesPAYMENT-SIGNATURE.The epa facilities API is a pay-per-call gov endpoint built for AI agents and autonomous software. EPA Facility Registry Service (FRS) — every regulated facility known to the EPA across all programs (RCRA hazardous waste, NPDES water discharge, SDWA drinking water, TRI toxic release, CAA Clean Air, Superfund, etc.).
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 epa facilities data source for an agent tool-use loop, an MCP host, or a backend that needs gov data on demand without onboarding to yet another vendor portal.
| Name | Type | Description |
|---|---|---|
staterequired | string | 2-letter US state code. Required. Example: "CA", "TX", "NY". min 2 chars · max 2 chars · match ^[A-Za-z]{2}$ |
name | string | Facility-name prefix match (case-insensitive). Example: "TESLA", "BOEING", "AMAZON". min 2 chars · max 80 chars |
program | string | Program system acronym. Examples: RCRA (hazardous waste), NPDES (water discharge), TRI (toxic release), AIR (Clean Air), SDWA (drinking water). min 2 chars · max 10 chars · match ^[A-Za-z0-9]+$ |
limit | integer | Max facilities to return (1-100). Default 25. min 1 · max 100 |
offset | integer | Offset for pagination. Default 0. min 0 · max 10000 |
# 1. Probe with no auth → 402 envelope with PaymentRequirements curl -sS 'https://2s.io/api/gov/epa-facilities?state=xx&name=xx&program=xx&limit=25&offset=0' # 2. Sign + retry with PAYMENT-SIGNATURE: curl -sS 'https://2s.io/api/gov/epa-facilities?state=xx&name=xx&program=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/gov/epa-facilities?state=xx&name=xx&program=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.gov.epaFacilities({
"state": "xx",
"name": "xx",
"program": "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.gov.epa_facilities(state="xx", name="xx", program="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": "gov.epa-facilities",
"arguments": {
"state": "xx",
"name": "xx",
"program": "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": [
{
"registryId": "example",
"primaryName": "example",
"locationAddress": "example",
"city": "example",
"state": "example",
"postalCode": "example",
"county": "example",
"epaRegion": "example",
"programSystem": "example",
"pgmSysId": "example",
"sourceOfData": "example",
"publicIndicator": "example"
}
],
"total": 1,
"source": {
"provider": "example",
"url": "example",
"license": "example"
},
"meta": {
"query": {
"state": "example",
"name": "example",
"program": "example",
"limit": 1,
"offset": 1
}
}
}