Researcher-Agent / docs /fred_data_schema.md
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Refactor: Source-keyed output format across all MCP servers
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## Base URL
`https://api.stlouisfed.org/fred`
## Series Info Endpoint
`GET /series`
### Query Parameters
```
series_id
api_key
file_type (json)
```
### Response Structure
```
seriess[]
title
units
frequency
```
## Series Observations Endpoint
`GET /series/observations`
### Query Parameters
```
series_id
api_key
file_type (json)
sort_order (desc)
limit
```
### Response Structure
```
observations[]
date
value
```
## Series IDs Used
### Macro Basket
```
A191RL1Q225SBEA (GDP growth rate)
FEDFUNDS (Federal Funds Rate)
CPIAUCSL (Consumer Price Index)
FPCPITOTLZGUSA (Inflation rate)
UNRATE (Unemployment Rate)
```
### Volatility Basket
```
VIXCLS (VIX Index)
```