# US Inflation Expectations — Market Breakevens & Cleveland Fed Estimates

> US Inflation Expectations — Market Breakevens & Cleveland Fed Estimates is a paid API for AI agents from marketdata.use.x402atlas.com, paid per call via x402, $0.015/call, status unknown (last checked 2026-09-15).

Returns US inflation expectations data including market breakeven rates and Cleveland Fed model estimates across multiple time horizons as macro time-series.

## Facts

- Endpoint: GET https://marketdata.use.x402atlas.com/inflation-expectations
- Price: $0.015/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/us-inflation-expectations-market-breakevens-cleveland-fed-estimates-83dd9e89
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_iOZ4bPsZHpaQQBOJtfN3y

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 us-inflation-expectations-market-breakevens-cleveland-fed-estimates-83dd9e89
```

Example prompt: Pull me the US inflation expectations data — both market breakevens and Cleveland Fed model estimates — from January 2023 through December 2023, up to 200 observations.

## When to prefer this

Use this endpoint when you need quantitative inflation expectations data grounded in both market pricing (TIPS breakevens) and model-based estimates (Cleveland Fed), especially for macro research, monetary policy analysis, or building inflation-aware financial models. Prefer over generic web search when you need structured, time-series numeric data with consistent methodology.

## Known failure modes

- Invalid date format (not YYYY-MM-DD) returns a 400 error
- Date range with no available data returns empty array
- Limit exceeding maximum allowed observations may be capped or return an error
- Missing payment header returns 402 Payment Required
- Future dates beyond available data return no results

## How this service works

US inflation expectations — market breakevens and Cleveland Fed model estimates across horizons, macro time-series.

## Output

A time-series of US inflation expectations observations including market-implied breakeven rates (from TIPS spreads) and Cleveland Fed model-based estimates across multiple maturity horizons (e.g. 1-year, 5-year, 10-year), keyed by observation date.

## 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": {
      "limit": {
       "type": "integer",
       "maximum": 50000,
       "minimum": 1,
       "description": "Max observations returned"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "queried_at",
      "series",
      "count",
      "observations"
     ],
     "properties": {
      "count": {
       "type": "integer",
       "description": "Number of observations returned."
      },
      "series": {
       "type": "string",
       "description": "Which macro series this response is for."
      },
      "queried_at": {
       "type": "string",
       "format": "date-time",
       "description": "UTC timestamp when this bridge queried the upstream."
      },
      "observations": {
       "type": "array",
       "items": {
        "type": "object"
       },
       "description": "Raw upstream observations for the series, passed through as reported (shape varies by series)."
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "count": 1,
  "series": "inflation-expectations",
  "queried_at": "2026-07-06T12:00:00Z",
  "observations": [
   {
    "date": "2025-06-17",
    "market_10_year": 2.36,
    "forward_years_5_to_10": 2.6
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/us-inflation-expectations-market-breakevens-cleveland-fed-estimates-83dd9e89/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from marketdata.use.x402atlas.com](https://www.zero.xyz/host/marketdata.use.x402atlas.com/llms.txt)