# Macro Indicators Period-over-Period Delta

> Macro Indicators Period-over-Period Delta is a paid API for AI agents from web-production-60258.up.railway.app, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Returns period-over-period changes (deltas) across key macroeconomic indicators using FRED data series

## Facts

- Endpoint: GET https://web-production-60258.up.railway.app/macro/delta
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/web-production-60258-up-railway-app-2d803e8c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kTu3oHphHKxnmztduTUAr

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability web-production-60258-up-railway-app-2d803e8c
```

Example prompt: Show me the period-over-period changes in inflation and unemployment over the last 8 periods so I can see the trend direction.

## When to prefer this

Use this endpoint when you need to understand how macro indicators have changed over time — not just current values — especially for trend analysis, economic monitoring, or comparative reports. Prefer this over the raw FRED series endpoint when you want pre-computed deltas rather than raw level data, and over the all-indicators snapshot endpoint when period-over-period change is specifically required.

## Known failure modes

- Invalid or unrecognized FRED series ID or name returns an error or empty result
- Periods value exceeding max of 24 may be rejected or clamped
- Series with insufficient historical data may return partial results
- Payment failure (402) if x402 payment header is missing or insufficient
- Rate limiting or upstream FRED API unavailability may cause 5xx errors

## How this service works

Period-over-period change across key macro indicators

## Output

Returns a structured object showing period-over-period deltas for one or more macro series (e.g. CPI, GDP, unemployment, federal funds rate). Each entry includes the current and prior period values, the absolute and/or percentage change, and timestamps. If no series is specified, returns deltas for 8 default key macro indicators.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "series": {
       "type": "string",
       "description": "Series name or FRED ID (e.g. \"inflation\", \"CPIAUCSL\"). Omit for 8 default series."
      },
      "periods": {
       "type": "integer",
       "description": "Periods to look back (default 4, max 24)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/web-production-60258-up-railway-app-2d803e8c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from web-production-60258.up.railway.app](https://www.zero.xyz/host/web-production-60258.up.railway.app/llms.txt)