
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.
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
在 SourceWeft 中
- 開啟 儀表板中的 Taxlocus,將其新增到工作區。
- 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。
- 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。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
jurisdiction_rates — local jurisdiction rates
nexus_thresholds — economic-nexus thresholds
taxability — state × category taxability matrix
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)
payroll_state_suta — state unemployment-insurance wage base + rate range
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
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
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
0版本歷史
1- v1.0.0最新Sep 16, 2026
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