●

Locale Format API

Data PAYMENT-READY

payment-ready until 2026-09-21

Verified, CLDR-versioned locale formatting for 120+ locales: currency amounts, numbers and dates per the official CLDR rules (de-CH apostrophe grouping, en-IN lakh, ja-JP zero decimals, Arabic-Indic digits), raw per-locale rules, and a /verify endpoint that checks YOUR formatted string against the canonical CLDR output before it lands in an invoice or document. Every response carries the CLDR/ICU version for auditability. $0.001 per call, USDC on Base via the Coinbase CDP facilitator. Free locale list.

Pay from $0.001 per request in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.

measured since 2026-07-12 (start of our harvest window) · $0 all-time · last settled 2026-09-13

BASE URL https://localeformat.com │ WEBSITE https://localeformat.com │ ENDPOINTS 5 │ NETWORK Base │ ASSET USDC │ MEMBER SINCE 2026-09-14 │ MONITORED SINCE 2026-09-14

VERDICT

ranking generation 3

solid 89/100 #15 of 302 in Data by measured score

What the score read on this service: status online, 100% uptime 24h (no 30d window yet), 138ms response p95, x402 compliance 14 of 14, $0.001 price against the category, on-chain traction measured. Each of those is measured, and each is published in full below.

The score comes from our own monitoring, never from reviews, operator claims, or a language model: reliability, x402 compliance, price against the category, a deterministic risk flag, and a small on-chain traction term, weighted by ranking generation 3. It is not placement anyone can buy: the paid verify tier is reported beside it and is not one of its inputs. Every component below stays published and read-only.

It is a score inside Data, and only there: price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, which here means 302 listings, this one among them. That set is wider than the 302 the position above is counted against, because a listing we have measured too little of to rank still sits in the field the price and the speed are normalized over. The same service in a different field would read differently. The same engine answers GET /api/v1/best, and asked for a different pool (the whole directory, or another filter) it returns a different number for this service under this same ranking generation. Neither is more correct: they answer different questions, and the methodology states which is which.

Bands on the 0 to 100 measured score: strong at 93 and above, solid from 75, mixed from 55, weak below 55. Price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, so the score places a service in its own field.

ALTERNATIVES IN DATA

Other Data services in this directory, ordered by the same measured score. The figures are ours: 30-day uptime from our own probes, 30-day settlement volume read on-chain (a conservative undercount, and null where we cannot measure it, never a zero).

Ranked alternative x402 services in the same category, with band, measured score, 30-day uptime and 30-day on-chain settlement volume
SERVICE	BAND	SCORE	UPTIME 30D	VOL 30D
StableEnrich	strong	96	100%	$1.9k
SniperX•x402	strong	95	100%	$508.77
glim.sh	strong	95	100%	$51.98
cn402	strong	93	100%	$38.86
API Acre	solid	92	99.8%	$34.05

5 of 301 other ranked services in Data · see the whole category

ASSESSMENT

updated 2h ago

The parts the verdict above is computed from, each with its proof. Click any chip. Measured values stay read-only; unknown is honest, and an unknown is never counted as a zero.

reliability 100%

uptime 24h: -
uptime 7d: -
uptime 30d: -
uptime 90d: -
response p95: 138ms
avg response: 138ms
total checks: 1

Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.

compliance A (14/14)

14 of 14 x402 conformance checks pass. Full checklist below.

jump to compliance checklist

price $0.001 (p10 in Data)

price (min): $0.001
category percentile (min): p10 in Data
endpoints / prices: 5 / 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.

domain age: -
registrar: -
hosting: custom
domain created: ---

Identity facts, not a risk score.

traction $0.00 30d · 0 buyers

volume 30d: $0.00
buyers 30d: 0
settlements 30d: 0
measured since: 2026-07-12 (start of our harvest window)
last settlement: 2026-09-13
top buyer share: -
trend 7d vs 30d: -
networks: eip155:8453
volume all-time: $0
settlements all-time: 0
median settlement 30d: -
max settlement 30d: -
settled via: -

Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.

Top buyer share is a concentration signal, not part of the ranking score.

WHAT IT DOES

ai-derived

No AI synthesis has been produced for this service yet.

ENDPOINTS

Service endpoints with HTTP method, path, description, pricing, and network
METHOD	PATH	PRICE	NETWORK	ASSET	402 CHANNEL
GET	/v1/currency	$0.001	Base	USDC	header
GET	/v1/datetime	$0.001	Base	USDC	header
GET	/v1/number	$0.001	Base	USDC	header
GET	/v1/rules	$0.001	Base	USDC	header
GET	/v1/verify	$0.001	Base	USDC	header

5 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to GET /v1/currency returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.

// request

curl -i 'https://localeformat.com/v1/currency'

// 402 response (captured by monitor) · 5 payloads · click to expand

[
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE72b85A97A6e19413D8b80633787Eda6d6237A77",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "http://localeformat.com/v1/currency",
      "tags": [
        "data",
        "i18n",
        "formatting",
        "localization",
        "verification"
      ],
      "mimeType": "application/json",
      "description": "Format a currency amount for any of ~700 locales per official CLDR rules (symbol position, separators, fraction digits — e.g. de-CH apostrophe grouping, en-IN lakh grouping, ja-JP zero decimals). Verified, CLDR-versioned output.",
      "serviceName": "Locale Format API"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {
              "amount": 1234.56,
              "locale": "de-DE",
              "currency": "EUR"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "parts": {
                "fractionDigits": 2,
                "groupSeparator": ".",
                "symbolPosition": "suffix",
                "decimalSeparator": ","
              },
              "source": "CLDR 48.0 / ICU 78.2 / Node 22",
              "formatted": "1.234,56 €",
              "resolvedLocale": "de-DE"
            }
          }
        },
        "schema": {
          "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",
                  "required": [
                    "amount",
                    "currency",
                    "locale"
                  ],
                  "properties": {
                    "amount": {
                      "type": "number",
                      "description": "amount (use '.' as decimal separator in input)"
                    },
                    "locale": {
                      "type": "string",
                      "description": "BCP 47 locale tag, e.g. de-DE, de-CH, en-IN, ja-JP, ar-EG"
                    },
                    "display": {
                      "type": "string",
                      "description": "symbol | narrowSymbol | code | name (default symbol)"
                    },
                    "currency": {
                      "type": "string",
                      "description": "ISO 4217 code, e.g. EUR, CHF, JPY"
                    }
                  }
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE72b85A97A6e19413D8b80633787Eda6d6237A77",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "http://localeformat.com/v1/number",
      "tags": [
        "data",
        "i18n",
        "formatting",
        "localization",
        "verification"
      ],
      "mimeType": "application/json",
      "description": "Format a number or percentage for any locale per CLDR (grouping, separators, numbering system — incl. Indian lakh grouping and Arabic-Indic digits).",
      "serviceName": "Locale Format API"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {
              "value": 1234567.89,
              "locale": "en-IN"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "formatted": "12,34,567.89",
              "resolvedLocale": "en-IN",
              "numberingSystem": "latn"
            }
          }
        },
        "schema": {
          "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",
                  "required": [
                    "value",
                    "locale"
                  ],
                  "properties": {
                    "style": {
                      "type": "string",
                      "description": "decimal | percent"
                    },
                    "value": {
                      "type": "number"
                    },
                    "digits": {
                      "type": "integer",
                      "description": "fixed fraction digits 0-20"
                    },
                    "locale": {
                      "type": "string",
                      "description": "BCP 47 locale tag, e.g. de-DE, de-CH, en-IN, ja-JP, ar-EG"
                    }
                  }
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE72b85A97A6e19413D8b80633787Eda6d6237A77",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "http://localeformat.com/v1/datetime",
      "tags": [
        "data",
        "i18n",
        "formatting",
        "localization",
        "verification"
      ],
      "mimeType": "application/json",
      "description": "Format an ISO date/time for any locale per CLDR (date order, month names, 12/24h, optional IANA time zone).",
      "serviceName": "Locale Format API"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {
              "iso": "2026-12-31",
              "locale": "de-DE",
              "dateStyle": "short"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "formatted": "31.12.26",
              "hourCycle": "h23",
              "resolvedLocale": "de-DE"
            }
          }
        },
        "schema": {
          "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",
                  "required": [
                    "iso",
                    "locale"
                  ],
                  "properties": {
                    "iso": {
                      "type": "string",
                      "description": "ISO 8601 date or datetime"
                    },
                    "locale": {
                      "type": "string",
                      "description": "BCP 47 locale tag, e.g. de-DE, de-CH, en-IN, ja-JP, ar-EG"
                    },
                    "timeZone": {
                      "type": "string",
                      "description": "IANA zone, e.g. Europe/Berlin"
                    },
                    "dateStyle": {
                      "type": "string",
                      "description": "full | long | medium | short"
                    },
                    "timeStyle": {
                      "type": "string",
                      "description": "full | long | medium | short"
                    }
                  }
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE72b85A97A6e19413D8b80633787Eda6d6237A77",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "http://localeformat.com/v1/rules",
      "tags": [
        "data",
        "i18n",
        "formatting",
        "localization",
        "verification"
      ],
      "mimeType": "application/json",
      "description": "Raw formatting rules for a locale as JSON: decimal/group separators, grouping sizes, currency symbol+position, date field order, first day of week, numbering system, hour cycle — with examples.",
      "serviceName": "Locale Format API"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {
              "locale": "de-CH"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "dateOrder": "day-month-year",
              "firstDayOfWeek": 1,
              "groupSeparator": "’",
              "resolvedLocale": "de-CH",
              "currencyPosition": "prefix",
              "decimalSeparator": "."
            }
          }
        },
        "schema": {
          "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",
                  "required": [
                    "locale"
                  ],
                  "properties": {
                    "locale": {
                      "type": "string",
                      "description": "BCP 47 locale tag, e.g. de-DE, de-CH, en-IN, ja-JP, ar-EG"
                    },
                    "currency": {
                      "type": "string",
                      "description": "optional ISO 4217 code for currency rules (default USD)"
                    }
                  }
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xE72b85A97A6e19413D8b80633787Eda6d6237A77",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "http://localeformat.com/v1/verify",
      "tags": [
        "data",
        "i18n",
        "formatting",
        "localization",
        "verification"
      ],
      "mimeType": "application/json",
      "description": "Verify YOUR OWN formatted string against the canonical CLDR output for a locale — returns valid true/false, the expected string and the differences. Use this to double-check LLM-generated invoices, contracts and documents before sending.",
      "serviceName": "Locale Format API"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {
              "type": "currency",
              "amount": 1234.56,
              "locale": "de-DE",
              "currency": "EUR",
              "formatted": "€1,234.56"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "valid": false,
              "expected": "1.234,56 €",
              "differences": [
                "currency symbol on the wrong side (locale uses suffix)"
              ],
              "resolvedLocale": "de-DE"
            }
          }
        },
        "schema": {
          "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",
                  "required": [
                    "type",
                    "formatted",
                    "locale"
                  ],
                  "properties": {
                    "iso": {
                      "type": "string",
                      "description": "for type=datetime"
                    },
                    "type": {
                      "type": "string",
                      "description": "currency | number | datetime"
                    },
                    "value": {
                      "type": "number",
                      "description": "for type=number"
                    },
                    "amount": {
                      "type": "number",
                      "description": "for type=currency"
                    },
                    "locale": {
                      "type": "string",
                      "description": "BCP 47 locale tag, e.g. de-DE, de-CH, en-IN, ja-JP, ar-EG"
                    },
                    "currency": {
                      "type": "string",
                      "description": "for type=currency"
                    },
                    "formatted": {
                      "type": "string",
                      "description": "the string to verify"
                    }
                  }
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2
  }
]

OVER TIME

All charts use the 30d selector; each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/locale-format-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). The on-chain series roll up hourly, so the latest day can be up to about an hour behind; distinct buyers are counted per payout address, so a service that settles to more than one address is an upper bound.

UPTIME

30d UPTIME 100%

RESPONSE TIME

AVG RESP 184ms

PRICE (captured 402, USD)

Median across 5 endpoints. Use the selector to isolate one.

SUB-SCORES (uptime + x402 compliance)

checklist grew 11->14 on 2026-07-28; a step here is a metric change, not a regression

VOLUME (on-chain settlement, USD)

DISTINCT BUYERS

COMPLIANCE

14/14 checks pass · grade A

last 402 captured 2026-09-14 · last up 2026-09-14

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
served over HTTPS
declares the current x402 version (2)
EIP-712 domain parameters present on every EVM entry
x402 v2 envelope delivered in the payment-required header

SITE PILLARS

homepage reachable
openapi doc
pricing page
llms.txt
robots.txt
terms page

recent checks (7) live · click to expand

TIME STATUS RESP CAUSE

20:59:00 UTC ● OK 160ms

20:43:01 UTC ● SLOW 328ms

20:27:00 UTC ● OK 160ms

20:11:01 UTC ● OK 180ms

19:55:00 UTC ● OK 120ms

19:39:01 UTC ● OK 200ms

19:23:00 UTC ● OK 138ms

EMBED THIS BADGE

Show that Locale Format API is monitored on x402-list. Paste this on your site or README, it links back to this live listing.

status

Locale Format API uptime on x402-list — live uptime

// HTML

<a href="https://x402-list.com/services/locale-format-api?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/locale-format-api.svg" alt="Locale Format API listed on x402-list" height="28">
</a>

// Markdown

[![Locale Format API on x402-list](https://x402-list.com/badge/locale-format-api.svg)](https://x402-list.com/services/locale-format-api?utm_source=badge&utm_medium=referral&utm_campaign=embed)

// HTML · live uptime variant

<a href="https://x402-list.com/services/locale-format-api?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/locale-format-api.svg?data=uptime" alt="Locale Format 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 ]

Earn the verified tier: x402list pays a real call to this endpoint and, if it delivers, the service is delivery-verified. The fee covers the cost of the probe, not the badge; there is no refund if the call does not deliver. Agent and API only, no in-browser signing. See /api.

[ verify this service ($0.25) ]

To request delisting, email info@x402-list.com or update your listing at /services/locale-format-api/update.