●

FuelTax IFTA Rates API

Data PAYMENT-READY

payment-ready until 2026-09-14

Human-reviewed IFTA quarterly tax rates, jurisdiction registry, footnotes, and USD/CAD exchange for trucking fleets and agents. USDC on Base via x402.

Pay from $0.002 to $0.01 per request in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.

measured since 2026-08-21 (start of our harvest window) · $0.06 all-time · settled via coinbase

BASE URL https://api.freestylevault.com │ WEBSITE https://api.freestylevault.com │ ENDPOINTS 4 │ NETWORK Base │ ASSET USDC │ MEMBER SINCE 2026-08-21 │ MONITORED SINCE 2026-08-21

VERDICT

ranking generation 3

solid 87/100 #170 of 265 in Data by measured score

What the score read on this service: status online, 99.3% uptime 30d, 737ms response p95, x402 compliance 14 of 14, $0.002 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 265 listings, this one among them. That set is wider than the 265 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
API Acre	strong	99	99.8%	---
AgentFund US Economic, SEC & On-Chain Data	strong	99	100%	---
KR Crypto Intelligence	strong	98	100%	---
SuVerse Pay	strong	98	100%	---
WebberSites x402 Data API	strong	98	100%	---

5 of 264 other ranked services in Data · see the whole category

ASSESSMENT

updated 15m 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 99.3%

uptime 24h: 100%
uptime 7d: 100%
uptime 30d: 99.3%
uptime 90d: 99.3%
response p95: 737ms
avg response: 402ms
total checks: 1,475

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 $0.002 to $0.01 (p25 in Data)

price (min): $0.002
price (max): $0.01
category percentile (min): p25 in Data
category percentile (max): p25 in Data
endpoints / prices: 4 / 3
model: tiered
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: 3201d
registrar: NameCheap, Inc.
hosting: custom
domain created: 2017-11-29

Identity facts, not a risk score.

traction $0.04 30d · 6 buyers

volume 30d: $0.04
buyers 30d: 6
settlements 30d: 8
measured since: 2026-08-21 (start of our harvest window)
last settlement: 2026-09-02
top buyer share: 25% of 30d volume
trend 7d vs 30d: 1.61x the 30d daily rate
networks: eip155:8453
volume all-time: $0.06
settlements all-time: 8
median settlement 30d: $0.005
max settlement 30d: $0.005
settled via: coinbase ($0.04, 8 tx)

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.

CHANGES

2 in 30d

Payout, price, and schema changes detected on this service's x402 wire. A payout rotation at an unchanged price shows up here even when nothing else moves. Full feed at /changes.

changes payout address changed 17d ago (2 in 30d)

payout address changed · 17d ago

payout removed 0x421D31725e1e7990662600A780ebbB6C92f1Cb09

payout added 0x421d31725e1e7990662600a780ebbb6c92f1cb09

schema changed · 17d ago

schema removed GET /v1/quarters/2026-Q2/changes exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 1 application/json 300 https://api.freestylevault.com/v1/quarters/2026-Q2/changes {"name":"USD Coin","version":"2"}

schema removed GET /v1/quarters/2026-Q2/exchange-rate exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 1 application/json 300 https://api.freestylevault.com/v1/quarters/2026-Q2/exchange-rate {"name":"USD Coin","version":"2"}

schema removed GET /v1/quarters/2026-Q2/footnotes exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 1 application/json 300 https://api.freestylevault.com/v1/quarters/2026-Q2/footnotes {"name":"USD Coin","version":"2"}

schema removed GET /v1/rates exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 1 application/json 300 https://api.freestylevault.com/v1/rates {"name":"USD Coin","version":"2"}

schema added GET /v1/quarters/2026-Q2/changes exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/quarters/2026-Q2/exchange-rate exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/quarters/2026-Q2/footnotes exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added GET /v1/rates exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

see all changes for this service

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	DESCRIPTION	PRICE	NETWORK	ASSET	402 CHANNEL
GET	/v1/quarters/2026-Q2/changes	Quarter-over-quarter rate diff with exact 6-decimal deltas, plus added/removed jurisdictions — what changed since last quarter, precomputed.	$0.01	Base	USDC	header
GET	/v1/quarters/2026-Q2/exchange-rate	The USD/CAD exchange rate published in that quarter's matrix.	$0.002	Base	USDC	header
GET	/v1/quarters/2026-Q2/footnotes	The quarter's official matrix footnotes (fuel-equivalence rules, tax holidays, split-rate notices) — the caveats that change filings.	$0.002	Base	USDC	header
GET	/v1/rates	Committed IFTA tax rates for a quarter (?quarter=2026-Q2&fuel_type=diesel&jurisdiction=WA), grouped by jurisdiction × fuel type with effective periods clipped to the quarter — mid-quarter revisions read as separate periods. Human-reviewed against iftach.org every quarter.	$0.005	Base	USDC	header

4 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to GET /v1/quarters/2026-Q2/changes returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.

// request

curl -i 'https://api.freestylevault.com/v1/quarters/2026-Q2/changes'

// 402 response (captured by monitor) · 4 payloads · click to expand

[
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x421d31725e1e7990662600a780ebbb6c92f1cb09",
        "amount": "2000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://api.freestylevault.com/v1/quarters/[quarter]/exchange-rate",
      "mimeType": "application/json",
      "description": "The USD/CAD exchange rate published in that quarter's matrix."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "pathParams": {
              "quarter": "2026-Q2"
            },
            "queryParams": {}
          },
          "output": {
            "type": "json",
            "example": {
              "data": {},
              "meta": {}
            }
          }
        },
        "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"
                },
                "pathParams": {
                  "type": "object"
                },
                "queryParams": {
                  "type": "object",
                  "properties": {}
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        },
        "routeTemplate": "/v1/quarters/:quarter/exchange-rate"
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x421d31725e1e7990662600a780ebbb6c92f1cb09",
        "amount": "5000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://api.freestylevault.com/v1/rates",
      "mimeType": "application/json",
      "description": "Committed IFTA tax rates for a quarter (?quarter=2026-Q2&fuel_type=diesel&jurisdiction=WA), grouped by jurisdiction × fuel type with effective periods clipped to the quarter — mid-quarter revisions read as separate periods. Human-reviewed against iftach.org every quarter."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {
              "quarter": "2026-Q2",
              "fuel_type": "diesel",
              "jurisdiction": "WA"
            }
          }
        },
        "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",
                  "properties": {
                    "quarter": {
                      "type": "string"
                    },
                    "fuel_type": {
                      "type": "string"
                    },
                    "jurisdiction": {
                      "type": "string"
                    }
                  }
                }
              },
              "additionalProperties": false
            }
          }
        }
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x421d31725e1e7990662600a780ebbb6c92f1cb09",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://api.freestylevault.com/v1/quarters/[quarter]/changes",
      "mimeType": "application/json",
      "description": "Quarter-over-quarter rate diff with exact 6-decimal deltas, plus added/removed jurisdictions — what changed since last quarter, precomputed."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "pathParams": {
              "quarter": "2026-Q2"
            },
            "queryParams": {}
          },
          "output": {
            "type": "json",
            "example": {
              "data": {},
              "meta": {}
            }
          }
        },
        "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"
                },
                "pathParams": {
                  "type": "object"
                },
                "queryParams": {
                  "type": "object",
                  "properties": {}
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        },
        "routeTemplate": "/v1/quarters/:quarter/changes"
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x421d31725e1e7990662600a780ebbb6c92f1cb09",
        "amount": "2000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://api.freestylevault.com/v1/quarters/[quarter]/footnotes",
      "mimeType": "application/json",
      "description": "The quarter's official matrix footnotes (fuel-equivalence rules, tax holidays, split-rate notices) — the caveats that change filings."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "pathParams": {
              "quarter": "2026-Q2"
            },
            "queryParams": {}
          },
          "output": {
            "type": "json",
            "example": {
              "data": {},
              "meta": {}
            }
          }
        },
        "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"
                },
                "pathParams": {
                  "type": "object"
                },
                "queryParams": {
                  "type": "object",
                  "properties": {}
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        },
        "routeTemplate": "/v1/quarters/:quarter/footnotes"
      }
    },
    "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/fueltax-ifta-rates-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 99.3%

RESPONSE TIME

AVG RESP 402ms

PRICE (captured 402, USD)

Median across 4 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

PILLARS OVER TIME (measured)

price percentile in Data

site signals present (of 6)

Measured site and economics pillars from the assessment history, so the latest value shown elsewhere on this page reads as a point on a trend rather than a permanent state.

VOLUME (on-chain settlement, USD)

DISTINCT BUYERS

COMPLIANCE

14/14 checks pass · grade A

last 402 captured 2026-08-21 · last up 2026-09-07

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 (18) live · click to expand

TIME STATUS RESP CAUSE

06:43:04 UTC ● OK 369ms

06:27:01 UTC ● OK 289ms

06:11:02 UTC ● OK 407ms

05:55:02 UTC ● OK 453ms

05:39:04 UTC ● OK 389ms

05:23:01 UTC ● OK 182ms

05:07:01 UTC ● OK 226ms

04:51:01 UTC ● OK 235ms

04:35:02 UTC ● OK 341ms

04:19:01 UTC ● OK 230ms

04:03:03 UTC ● SLOW 635ms

03:47:02 UTC ● OK 323ms

03:31:02 UTC ● OK 402ms

03:15:02 UTC ● OK 412ms

02:59:02 UTC ● OK 313ms

02:43:02 UTC ● OK 358ms

02:27:02 UTC ● OK 339ms

02:11:02 UTC ● OK 343ms

EMBED THIS BADGE

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

status

FuelTax IFTA Rates API uptime on x402-list — live uptime

// HTML

<a href="https://x402-list.com/services/fueltax-ifta-rates-api?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/fueltax-ifta-rates-api.svg" alt="FuelTax IFTA Rates API listed on x402-list" height="28">
</a>

// Markdown

[![FuelTax IFTA Rates API on x402-list](https://x402-list.com/badge/fueltax-ifta-rates-api.svg)](https://x402-list.com/services/fueltax-ifta-rates-api?utm_source=badge&utm_medium=referral&utm_campaign=embed)

// HTML · live uptime variant

<a href="https://x402-list.com/services/fueltax-ifta-rates-api?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/fueltax-ifta-rates-api.svg?data=uptime" alt="FuelTax IFTA Rates 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/fueltax-ifta-rates-api/update.