Taxlocus

com.taxlocus由 taxlocus.com 發布官方發布者v1.0.0更新於 Nov 2, 2026

US sales tax for AI agents: rates, economic nexus, taxability, filing. Citation-backed.

已驗證Streamable HTTP可網頁執行金融資料與分析商業與電商

概覽

AI 產生的概覽

TaxLocus 遠端伺服器,讓助理查詢附引用來源的美國銷售稅稅率、經濟關聯門檻、應稅判定與薪資稅參考資料。

可以做什麼
  • 依州及依具名地方轄區(郡、市、交通區、特別區)查詢美國銷售稅稅率
  • 查看各州針對遠端賣家的經濟關聯門檻與計算規則
  • 查閱州與商品類別交叉的應稅/免稅判定表
  • 取得薪資稅參考表:聯邦 FICA/FUTA、州個人所得稅扣繳、SUTA 工資基數、地方所得稅與州際互惠
  • 回傳附引用來源的數值,可對照權威來源核驗
適用情境
適合助理需要回答美國銷售稅或薪資稅參考問題時使用:具名轄區的稅率、關聯門檻、某類商品是否應稅、扣繳參考數值,且答案應可追溯至引用來源。若需要某個具體街道地址的精確稅率,則不適合。
執行需求
遠端 streamable HTTP 端點 api.taxlocus.com,需要 OAuth 驗證。未宣告環境變數或請求標頭。地址層級查詢、轄區幾何邊界與關聯追蹤屬於另外的付費產品。
安裝前請注意
資料僅供參考,明確不構成稅務建議;稅率與規則變動頻繁,快照可能有錯誤或遺漏,申報或繳納前應向相關州稅務機關核實。薪資稅涵蓋範圍有已記錄的缺口,且不含雇主自身的 SUTA 稅率;扣繳計算與責任由使用者自行承擔。地址層級解析與關聯追蹤為付費功能。

安裝

在 SourceWeft 中

  1. 開啟 儀表板中的 Taxlocus,將其新增到工作區。
  2. 連接 所需的 憑證。它們會被私密儲存,絕不會在公開頁面上展示。
  3. 為需要使用其工具的對話啟用該服務。

Web executable,透過 Streamable HTTP。 遠端服務在工作區中設定後即可從網頁執行環境執行。

交給代理程式安裝

把這段提示詞貼上到 Claude Code、Codex、Cursor 等代理程式,或 SourceWeft 對話中。代理程式會讀取該伺服器的安裝指南,先向你展示發布者、端點和登入方式,經你同意後再把它新增到你的客戶端。金鑰不會寫進任何命令。

閱讀 https://sourceweft.com/mcp/com.taxlocus%2Ftaxlocus/install.md,並按其中說明把這個 MCP 伺服器接入我的客戶端。修改任何設定之前,先告訴我它的發布者、端點和登入方式,等我確認。不要把 API 金鑰寫進命令或我會提交的檔案;問我金鑰應從哪裡取得。

檢視代理程式所依據的安裝指南

其他 MCP 客戶端

把它新增到你客戶端的 mcpServers 設定中。 客戶端會在首次連接時完成 OAuth 登入。

{
  "mcpServers": {
    "taxlocus": {
      "type": "http",
      "url": "https://api.taxlocus.com/mcp"
    }
  }
}

README

TaxLocus Open Sales-Tax Dataset

Free, weekly-updated US sales-tax rate tables — the flat data behind TaxLocus, released as an open dataset for the community.

Data as of: 2026-05-19 · Refreshed weekly from the live TaxLocus corpus.

What this is

A clean, flat snapshot of US sales-tax rates and rules:

  • State base rates for all sales-tax states.
  • Local jurisdiction rates — ~14,000 counties, cities, parishes, boroughs, transit and special districts.
  • Economic-nexus thresholds — the per-state remote-seller registration triggers.
  • Taxability matrix — state × product-category taxable/exempt treatment.

Both CSV and JSON are provided for every table.

What this is not

This is the rate data only. The address-level lookup API, the polygon geometry that resolves an address to its jurisdiction stack, and the nexus tracking tools are the paid product at taxlocus.com. This dataset will tell you the rate for a named jurisdiction; it will not tell you which jurisdictions a given street address falls in.

Files & schema

All files live in data/.

state_rates — statewide base rates

columndescription
state2-letter state code
ratestatewide base sales-tax rate (decimal, e.g. 0.0625)

jurisdiction_rates — local jurisdiction rates

columndescription
state2-letter state code
jurisdiction_typecounty, city, parish, borough, transit, or special_district
namejurisdiction name
fips_codeCensus FIPS code, where available (may be blank)
ratelocal rate for the jurisdiction (decimal)

nexus_thresholds — economic-nexus thresholds

columndescription
state2-letter state code
sales_thresholdUSD sales threshold (may be blank)
transaction_thresholdtransaction-count threshold (may be blank)
logicsales_only, transactions_only, sales_or_count, or sales_and_count
measurement_periodprior_calendar_year, current_or_prior_cy, rolling_12_month, or prior_4_quarters

taxability — state × category taxability matrix

columndescription
state2-letter state code
categoryproduct-category code (e.g. food.grocery, clothing.general)
taxableTrue/False
treatmenttaxable, exempt, reduced_rate, exempt_with_cert, or partial

manifest.json

Generation date and per-file row counts for the current snapshot.

Payroll-tax open data (new — Plan 14)

Reference tables for US payroll tax — federal FICA/FUTA, state personal income tax (PIT) and SUTA wage bases, and local income tax where it exists (PA, OH, MD, IN, NYC, etc.). Same shape + CC-BY-4.0 licence; every row carries a citation_url to the authoritative source (IRS, state DOR, state UI agency) so any value can be verified or refreshed against the source. This is rate / reference data only — not a withholding-tax calculation engine, not the per-employer SUTA experience rate (which is state-assigned and not lookupable). Consumers compute their own withholding and take liability for it.

payroll_federal_rates

FICA (SS + Medicare + Additional Medicare 0.9% > $200k) and FUTA rates, wage bases, and credit max by year.

payroll_state_pit — state personal income tax (wage withholding)

columndescription
yeartax year
state2-letter state code
tax_typenone (no wage income tax) / flat / progressive
flat_rateflat rate (when tax_type='flat')
top_marginaltop marginal rate (when tax_type='progressive')
bracket_summaryoptional compact JSON of brackets
supplemental_ratesupplemental (bonus) withholding rate where published
citation_urlstate DOR / withholding guide
notesper-state nuance

payroll_state_suta — state unemployment-insurance wage base + rate range

columndescription
yeartax year
state2-letter state code
wage_baseannual SUTA wage base per employee
new_employer_ratenew-employer assigned rate (when published)
min_rate / max_ratebounds of the experience-rate range
citation_urlstate UI agency

Per-employer SUTA rates are NOT included — each employer's rate is experience-rated and assigned by the state UI agency annually.

payroll_local_income_tax — city / county / municipal income tax

columndescription
yeartax year
state2-letter state code
jurisdiction_typecity / county / municipality / school_district / township / borough
jurisdiction_namee.g. Philadelphia, Anne Arundel County, New York City
geoidFIPS / place GEOID when known
resident_rate / non_resident_ratewithholding rates
courtesy_withholdingwhether the state publishes a courtesy-withholding flag
citation_urlstate DOR / local agency

Local income tax coverage (3,662 rows, 8 states): PA (2,627 PSDs) · OH (890 munis: RITA + CCA + DOR self-administered) · IN (92 counties) · MD (24 counties) · MI (24 cities) · NY (NYC + Yonkers) · MO (KC + STL) · DE (Wilmington). The remaining ~8 states with some local income tax are not yet covered (KY, IA, OR, AL, CO, WV, KS, NJ-Newark); the other ~34 states have no local income tax at all. Read PAYROLL-COVERAGE.md before relying on this data for withholding — it documents every gap and the disclaimer in detail.

payroll_reciprocity — state income-tax reciprocity agreements

columndescription
state_a / state_bthe two states
directionmutual or a_to_b (one-way)
citation_urlstate DOR

Reciprocity exempts the non-resident state from withholding when an employee files the exemption form (e.g., PA REV-419, MD MW507).

License & attribution

This dataset is licensed under the Creative Commons Attribution 4.0 International (CC-BY-4.0) license — see LICENSE.

You are free to use, share, and adapt the data, including commercially, provided you give credit. Required attribution:

Sales-tax data by TaxLocus — https://taxlocus.com

Disclaimer

This dataset is provided for informational purposes only and is not tax advice. Sales-tax rates and rules change frequently, special districts and local boundaries are complex, and this snapshot may contain errors or omissions. Always verify against the relevant state Department of Revenue before relying on it for filing or remittance. TaxLocus makes no warranty as to accuracy, completeness, or fitness for any purpose.

Need address-level accuracy?

The free dataset gives you rates by named jurisdiction. To resolve a real street address to its exact jurisdiction stack — with geometry, product taxability, and economic-nexus tracking — use the TaxLocus API at taxlocus.com.

來源:README.md,提交 ab79cc7

工具

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版本歷史

1
  1. v1.0.0最新Sep 16, 2026

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