x402 List

x402 Protocol Service Directory

US CPI Data & Inflation Report API

Finance

Gives you official United States inflation numbers from the government's BLS Consumer Price Index. Ask for the newest reading, a specific month in the past, or a whole range of months, and get back clear percentages for overall inflation and 'core' inflation (which ignores food and energy prices), plus a plain-English summary sentence.

Pay from $0.01 per request in USDC on Base / Solana, settled onchain via the x402 protocol, no signup, no API key needed.

UPTIME 24H 100% 7D 100% 30D 100%
BASE URL https://cpi-report-us.underscoredone.com WEBSITE https://underscoredone.com/cpi_report_us/ ENDPOINTS 1 NETWORK Base / Solana ASSET USDC MEMBER SINCE 2026-07-15 MONITORED SINCE 2026-07-15

ASSESSMENT

updated 4h ago

Evidence-backed signals, not a single score. Click any chip for the proof. Measured values stay read-only; unknown is honest.

reliability 100%
uptime 24h
-
uptime 7d
-
uptime 30d
-
uptime 90d
-
response p95
777ms
avg response
777ms
total checks
1
compliance A (11/12)

11 of 12 x402 conformance checks pass. Full checklist below.

jump to compliance checklist

price $0.01 (p63 in Finance)
price (min)
$0.01
category percentile (min)
p63 in Finance
category percentile (max)
p38 in Finance
endpoints / prices
1 / 1
model
flat
stability
100%
risk clean

No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.

WHAT IT DOES

ai-derived

Provides US CPI inflation data from the BLS Consumer Price Index.

category
finance
in
query params
financeinflationcpieconomic-data

AI-generated summary. The measured data is never altered by it.

ENDPOINTS

Service endpoints with HTTP method, path, description, pricing, and network
METHOD PATH DESCRIPTION PRICE NETWORK ASSET
GET /cpi $0.01 Base/Solana USDC
1 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to GET /cpi returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.

// request
curl -i 'https://cpi-report-us.underscoredone.com/cpi'
// 402 response (captured by monitor) · 1 payload · click to expand
[
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE9740820225B3918b4ddd1292C7cA4Ca0e2C2F08",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
        },
        "payTo": "8ugAWAXDB8V18kiUrGZTq1oMvU3C6Fxs8hfC6rvzQT3b",
        "amount": "10000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://cpi-report-us.underscoredone.com/cpi",
      "tags": [
        "Dates"
      ],
      "mimeType": "application/json",
      "description": "Gives you official United States inflation numbers from the government's BLS Consumer Price Index. Ask for the newest reading, a specific month in the past, or a whole range of months, and get back clear percentages for overall inflation and 'core' inflation (which ignores food and energy prices), plus a plain-English summary sentence.",
      "serviceName": "US CPI Data & Inflation Report"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "period": "2024-03"
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "api_version": "1.0.0"
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "properties": {
                "body": {
                  "type": "object",
                  "required": [],
                  "properties": {
                    "end": {
                      "type": "string",
                      "description": "The last month of a historical range, written as year-month, like 2024-12. Leave out to end at the newest available month."
                    },
                    "start": {
                      "type": "string",
                      "description": "The first month of a historical range, written as year-month, like 2023-01. Leave out to start from the earliest available month."
                    },
                    "period": {
                      "type": "string",
                      "description": "A single month to look up, written as year-month, like 2024-03. Leave this out if you want the newest data or a range instead."
                    }
                  },
                  "additionalProperties": false
                },
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "POST",
                    "PUT",
                    "PATCH"
                  ],
                  "type": "string"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object",
                  "required": [
                    "api_version"
                  ],
                  "properties": {
                    "api_version": {
                      "type": "string"
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2
  }
]

UPTIME

07-15 · uptime 100.0% · 1137ms avg07-1507-15
RESPONSE TIME
07-15 · 1137ms avg07-15 · 1137ms avg07-1507-15
24h UPTIME 100%
UPTIME 24H 100%
AVG RESP 1122ms
TOTAL CHECKS 17

RECENT CHECKS

TIME STATUS RESP
● OK 882ms
● OK 769ms
● OK 1413ms
● OK 1520ms
● OK 957ms
● OK 711ms
● OK 1302ms
● OK 932ms
● OK 1038ms
● OK 1455ms
● OK 565ms
● OK 1212ms
● OK 1534ms
● OK 784ms
● SLOW 1783ms
● OK 1446ms
● OK 777ms

OVER TIME

All charts share the 24h window selected here. Every series is also served as JSON at /api/v1/services/us-cpi-data-inflation-report-api/price, /scores, /volume and /buyers. On-chain volume and distinct buyers are measured over the service's settlement address and are a conservative undercount (only settlements that reach a measured facilitator are counted).

PRICE (captured 402, USD)
building price history ($0.01)
SUB-SCORES (uptime + x402 compliance)
building assessment history (1 day so far)
VOLUME (on-chain settlement, USD)
07-14 · $0.0107-15 · $0.21peak $0.2107-1407-15

Top buyer 21% of 30d volume. Published as a concentration signal for the reader, not part of the ranking score.

Shared payout address (2 other services). On-chain settlement on this address may include those services, so this reads as operator volume, not service-only.

DISTINCT BUYERS
07-14 · 1 buyer07-15 · 8 buyerspeak 8 buyers07-1407-15

Shared payout address (2 other services). Buyers on this address may include those of other services on the same address.

COMPLIANCE

11/12 checks pass · grade A
  • 402 payload captured
  • accepts[] array present
  • payTo address recoverable
  • payTo at accepts[0].payTo (conformant shape)
  • payTo is a valid on-chain address
  • atomic price declared
  • atomic price in a sane range
  • asset (token) address declared
  • network resolves to CAIP-2
  • payment scheme declared
  • response mimeType declared
  • served over HTTPS

EMBED THIS BADGE

Show that US CPI Data & Inflation Report API is monitored on x402-list. Paste this on your site or README, it links back to this live listing.

US CPI Data & Inflation Report API listed on x402-list
status
US CPI Data & Inflation Report API uptime on x402-list
live uptime
// HTML
<a href="https://x402-list.com/services/us-cpi-data-inflation-report-api?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/us-cpi-data-inflation-report-api.svg" alt="US CPI Data & Inflation Report API listed on x402-list" height="28">
</a>
// Markdown
[![US CPI Data & Inflation Report API on x402-list](https://x402-list.com/badge/us-cpi-data-inflation-report-api.svg)](https://x402-list.com/services/us-cpi-data-inflation-report-api?utm_source=badge&utm_medium=referral&utm_campaign=embed)
// HTML · live uptime variant
<a href="https://x402-list.com/services/us-cpi-data-inflation-report-api?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/us-cpi-data-inflation-report-api.svg?data=uptime" alt="US CPI Data & Inflation Report API uptime on x402-list" height="28">
</a>

RUN THIS SERVICE?

Keep this listing accurate: propose changes to the name, description, website, category or add new endpoints to monitor. Ownership is verified with a domain proof and every change is reviewed manually; measured data stays read-only.

[ update this listing ]