Any series in the Federal Reserve's FRED database (800k+ US & international economic time series). HOW TO USE: if you know the series id, pass seriesId to get the series metadata (title, units, frequency, seasonal adjustment, observation range, last updated) + its most-recent observations (date + value, newest first; optionally bound the range with start/end YYYY-MM-DD and cap with limit). If you DON'T know the id, pass query to full-text search the catalog (returns ids + titles + units + frequency, most-popular first) — then call again with the seriesId you found. Popular ids: UNRATE (unemployment rate), CPIAUCSL (CPI), PCEPI (PCE price index), GDP / GDPC1 (nominal / real GDP), PAYEMS (nonfarm payrolls), FEDFUNDS (fed funds rate), DGS10 / DGS2 (10yr / 2yr Treasury), T10Y2Y (10y-2y spread), MORTGAGE30US (30yr mortgage), SP500, VIXCLS (VIX), DEXUSEU (USD/EUR), DCOILWTICO (WTI oil), HOUST (housing starts), UMCSENT (consumer sentiment), M2SL (M2 money supply). Each series' units and frequency come back in the metadata so you know how to read the values. Free, public-domain for most series (FRED attribution). Distinct from econ.indicator (a small curated headline set) — this is the FULL catalog. Companion endpoints: econ.fred-releases (when reports are published — the data calendar) and econ.fred-vintage (point-in-time / revised values for honest backtesting).
/api/econ/fredPAYMENT-SIGNATURE.The fred API is a pay-per-call econ endpoint built for AI agents and autonomous software. Any series in the Federal Reserve's FRED database (800k+ US & international economic time series).
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 fred data source for an agent tool-use loop, an MCP host, or a backend that needs econ data on demand without onboarding to yet another vendor portal.
| Name | Type | Description |
|---|---|---|
seriesId | string | min 1 chars · max 60 chars |
query | string | min 1 chars · max 120 chars |
limit | integer | min 1 · max 100 |
start | string | match ^\d{4}-\d{2}-\d{2}$ |
end | string | match ^\d{4}-\d{2}-\d{2}$ |
# 1. Probe with no auth → 402 envelope with PaymentRequirements curl -sS 'https://2s.io/api/econ/fred?seriesId=example&query=example&limit=1&start=2024-01-01&end=2024-01-01' # 2. Sign + retry with PAYMENT-SIGNATURE: curl -sS 'https://2s.io/api/econ/fred?seriesId=example&query=example&limit=1&start=2024-01-01&end=2024-01-01' \ -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/econ/fred?seriesId=example&query=example&limit=1&start=2024-01-01&end=2024-01-01'
import { TwoS } from '@2sio/sdk'
const client = new TwoS({
privateKey: process.env.EVM_PRIVATE_KEY as `0x${string}`,
})
const result = await client.econ.fred({
"seriesId": "example",
"query": "example",
"limit": 1,
"start": "2024-01-01",
"end": "2024-01-01"
})
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.econ.fred(seriesId="example", query="example", limit=1, start="2024-01-01", end="2024-01-01")
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": "econ.fred",
"arguments": {
"seriesId": "example",
"query": "example",
"limit": 1,
"start": "2024-01-01",
"end": "2024-01-01"
}
}
}| Field | Type | Description |
|---|---|---|
ok | boolean | one of: true |
items | array | |
total | integer | Total matching rows upstream; null when unknown. |
source | object |
{
"ok": true,
"items": [
{
"id": "example",
"title": "example",
"units": "example",
"unitsShort": "example",
"frequency": "example",
"frequencyShort": "example",
"seasonalAdjustment": "example",
"lastUpdated": "example",
"observationStart": "example",
"observationEnd": "example",
"popularity": 1,
"notes": "example",
"observations": [
{
"date": "example",
"value": 1
}
]
}
],
"total": 1,
"source": {
"provider": "example",
"url": "example",
"license": "example"
}
}