# Oracles Core CPI Brief

> Oracles Core CPI Brief is a paid API for AI agents from oracles-production.up.railway.app, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-14).

Returns an LLM-generated narrative summary of the recent trend in US core CPI (Consumer Price Index excluding food and energy)

## Facts

- Endpoint: GET https://oracles-production.up.railway.app/v1/econ-core-cpi/brief
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/oracles-core-cpi-brief-096219c5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_SuVAHomu5xYdNkkF4VyiI

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 oracles-core-cpi-brief-096219c5
```

Example prompt: Can you give me an AI-written brief on the recent trend in core CPI — the inflation measure that strips out food and energy — over the past 30 days?

## When to prefer this

Choose this endpoint when you need a human-readable, LLM-written narrative interpretation of core CPI trends rather than raw data points. Ideal for agents building economic summaries, briefings, or dashboards that require plain-English inflation analysis. Use the 'since' parameter when you need a custom lookback window beyond the default 30 days.

## Known failure modes

- No recent core CPI observations available for the requested window — returns empty or minimal brief
- Invalid date-time format for 'since' parameter — schema validation error
- Payment not confirmed — 402 payment required before response is returned
- Upstream FRED or data source unavailable — may result in stale or failed generation

## How this service works

An LLM-written read on the recent trend in core CPI (less food & energy).

## Output

A short LLM-generated narrative paragraph describing the recent trend in core CPI (less food and energy), along with metadata indicating whether it was generated by an LLM or template and how many data observations it was based on.

## 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": {
      "since": {
       "type": "string",
       "format": "date-time",
       "description": "Window start (default: last 30 days)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "brief": {
       "type": "string"
      },
      "generatedBy": {
       "enum": [
        "llm",
        "template"
       ],
       "type": "string"
      },
      "basedOnChanges": {
       "type": "integer"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/oracles-core-cpi-brief-096219c5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from oracles-production.up.railway.app](https://www.zero.xyz/host/oracles-production.up.railway.app/llms.txt)