# IntentFence US CPI Verified Data Endpoint

> IntentFence US CPI Verified Data Endpoint is a paid API for AI agents from agentpass-protocol.rmalka06.chatgpt.site, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-10).

Returns verified US Consumer Price Index (CPI) data — headline and core, index values and year-over-year percent changes — for a given month, with x402 payment quote validation checks.

## Facts

- Endpoint: GET https://agentpass-protocol.rmalka06.chatgpt.site/api/us-cpi?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/intentfence-us-cpi-verified-data-endpoint-8af09b1a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nvNuXOJQU_86C-6TtNFYF

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 intentfence-us-cpi-verified-data-endpoint-8af09b1a
```

Example prompt: Can you get me the latest verified US CPI data — headline and core index values plus year-over-year percent changes — with a signed receipt confirming it came from an official source?

## When to prefer this

Choose this endpoint when you need verified, signed US CPI data (headline and core) with an assurance receipt proving official sourcing, especially in agentic workflows where payment integrity (x402 quote validation) and data provenance matter. Prefer it over raw BLS API calls when you need a structured, agent-ready response with built-in verification metadata and micro-payment access ($0.001 USDC).

## Known failure modes

- Invalid month format (not matching YYYY-MM pattern) returns a validation error
- Requesting a future or not-yet-published month may return no data or an error
- x402 payment not completed or invalid quote results in 402 response blocking data access
- Network or upstream BLS data source unavailability may cause timeouts or 503 errors

## How this service works

Fail-closed, action-bound authorization for AI agents with five-minute ES256 receipts, MCP risk scanning, and x402 payment safety.

## Output

A JSON object containing: headline and core CPI index values and year-over-year percent changes; the period covered (month name, year, YYYY-MM string); a verification status field ('verified'); a signed receipt object with assurance level ('official-source-data'); a UUID request ID; and the IntentFence version string. All data is presented as confirmed-official sourced figures.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "month": {
       "type": "string",
       "pattern": "^20[0-9]{2}-(?:0[1-9]|1[0-2])$",
       "description": "Optional CPI month in YYYY-MM. Omit for the latest complete headline/core period."
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "intentfence",
      "request_id",
      "status",
      "source",
      "period",
      "cpi",
      "summary",
      "checks",
      "receipt"
     ],
     "properties": {
      "cpi": {
       "type": "object"
      },
      "checks": {
       "type": "array",
       "items": {
        "type": "object"
       }
      },
      "period": {
       "type": "object"
      },
      "source": {
       "type": "object"
      },
      "status": {
       "type": "string",
       "const": "verified"
      },
      "receipt": {
       "type": "object"
      },
      "summary": {
       "type": "string"
      },
      "request_id": {
       "type": "string",
       "format": "uuid"
      },
      "intentfence": {
       "type": "string",
       "const": "0.8"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "cpi": {
   "core_index": 336.882,
   "headline_index": 333.952,
   "core_yoy_percent": 2.594,
   "headline_yoy_percent": 3.531
  },
  "period": {
   "name": "June",
   "year": "2026",
   "month": "2026-06"
  },
  "status": "verified",
  "receipt": {
   "signed": true,
   "assurance": "official-source-data"
  },
  "request_id": "a6f37ff9-90aa-43f7-8304-f329292bc702",
  "intentfence": "0.8"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/intentfence-us-cpi-verified-data-endpoint-8af09b1a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentpass-protocol.rmalka06.chatgpt.site](https://www.zero.xyz/host/agentpass-protocol.rmalka06.chatgpt.site/llms.txt)