FRED Search
Search the FRED API for economic data series. Use this when you need to find FRED series IDs for use in economic_indicators(series_id='...') transforms.
API Key
The FRED API requires a free API key. Set it in .env:
FRED_API_KEY=your_key_here
Get one at: https://fred.stlouisfed.org/docs/api/api_key.html
How to Search
Given the user's query (e.g., "central bank rate australia", "GDP growth mexico quarterly"), perform the search using the FRED API.
Step 1: Load API Key
source /home/adesola/EpochDev/ClaudeCodeResearch/.env 2>/dev/null
echo $FRED_API_KEY
If no key is set, use the default demo key: DEMO_KEY (rate-limited but functional).
Step 2: Search FRED
Use WebFetch to call the FRED API. The main endpoints:
Series Search (primary)
https://api.stlouisfed.org/fred/series/search?search_text=<QUERY>&api_key=<KEY>&file_type=json&limit=20&order_by=popularity
Series Search by Tags
https://api.stlouisfed.org/fred/tags/series?tag_names=<TAG1>;<TAG2>&api_key=<KEY>&file_type=json&limit=20
Get Series Details (when you have a series ID)
https://api.stlouisfed.org/fred/series?series_id=<ID>&api_key=<KEY>&file_type=json
Get Series Observations (to check date range and values)
https://api.stlouisfed.org/fred/series/observations?series_id=<ID>&api_key=<KEY>&file_type=json&sort_order=desc&limit=5
Step 3: Present Results
For each matching series, show:
| Field | Description |
|---|---|
| Series ID | The FRED identifier (e.g., ECBDFR) |
| Title | Full series name |
| Frequency | Monthly, Quarterly, Daily, etc. |
| Date Range | First observation to last observation |
| Units | Percent, Index, Billions, etc. |
| Source | Data provider (ECB, OECD, BLS, etc.) |
| Popularity | FRED popularity score |
Step 4: Recommend Best Match
Based on the user's needs, recommend the best series considering:
- Frequency: Monthly preferred for
economic_indicators()(aligns with daily market data via ffill) - Date range: Must cover the study period (typically 2020-2026)
- Recency: Prefer actively updated series
- Source quality: OECD, central banks, BLS preferred
Common Search Patterns
| Need | Search Query | Example Series |
|---|---|---|
| Central bank rate | "central bank rate <country>" |
IRSTCB01xxM156N |
| Overnight rate | "overnight interbank rate <country>" |
IRSTCI01xxM156N |
| GDP growth | "GDP growth <country> quarterly" |
xxxGDPRQPSMEI |
| Inflation CPI | "consumer price index <country>" |
CPIAUCSL |
| Unemployment | "unemployment rate <country>" |
UNRATE |
| Interest rate spread | "yield spread <country>" |
T10Y2Y |
Usage in EpochScript
Once you find the right series ID, use it as:
date, value, revision = economic_indicators(series_id='SERIES_ID')()
filled = ffill(value)
Notes
- FRED has 800,000+ series — search is the fastest way to find what you need
- Series ending in
M156Nare monthly,Q156Nquarterly - OECD series (IRSTCB01, IR3TIB01, etc.) have consistent naming across countries
order_by=popularitysurfaces the most-used series first