{"uid":"cap_vpuwmAVHzVMbwBoLexz7T","slug":"us-sales-tax-economic-nexus-checker-e8665adb","name":"US Sales Tax Economic Nexus Checker","description":"Pay-per-call tools for AI agents, 31 in all: read web pages and RSS feeds, OCR, PDF text, transcription; email, phone and domain checks; UK, Irish and Polish company lookups and UK risk reports; website contacts, tech stack and SEO audits; PageSpeed; AI review, job post and row enrichment; data cleaning, joins, dedupe and diffs; US and EU compliance rules. No account or API key: pay each call in USDC on Base over x402.","url":"https://x402-agent-tools.nerolabs.workers.dev/rules/us-sales-tax-nexus?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"date":{"type":"string","description":"The date to check the rules on, YYYY-MM-DD. Defaults to today. Thresholds changed in several states; past dates use the rule then in force."},"period":{"enum":["last_12_months","previous_calendar_year","current_calendar_year"],"type":"string","description":"What period the figures cover: last_12_months (default), previous_calendar_year or current_calendar_year (year to date)."},"sales_by_state":{"type":"array","items":{"type":"object"},"description":"One item per state the seller ships into: {\"state\":\"CA\",\"sales\":612000,\"transactions\":3400}. Optional per item: marketplace_sales and marketplace_transactions (the part made through marketplace facilitators like Amazon), retail_sales (sales excluding sales for resale), taxable_sales (sales excluding exempt sales). Dollars are US dollars."},"show_all_states":{"type":"boolean","description":"True to also list every sales tax state the seller did not report sales for. Default false."},"includes_marketplace_sales":{"type":"boolean","description":"True (default) if the sales and transactions figures include sales made through marketplace facilitators. Many states exclude those sales when testing a remote seller's threshold."}}},"responseSchema":{"type":"json","example":{"date":"2026-10-21","verdict":"Register in 1 state: CA.","disclaimer":"Information, not legal advice. Built from primary government sources (linked per figure); check the source before acting on a close call.","_example_note":"Real output, trimmed: long lists cut to their first items and long text shortened.","must_register":[{"name":"California","note":"AB 147 passed 25 April 2019 and applied the $500,000 test to sales from 1 April 2019; district taxes from 25 April 2019. Retailers must also...","state":"CA","result":"Over the threshold on the figures given (SAFE answer): register to collect sales tax.","source":"https://www.cdtfa.ca.gov/industry/wayfair.htm","threshold":"$500,000 in sales","depends_on":["Your figures cover the last 12 months; California measures previous or current calendar year (crossing in either counts). Re-run with figure..."],"register_by":"Register and start collecting straight after the sale that takes total sales over $500,000 (CDTFA example: threshold passed on 6 July, regis...","what_counts":"Total combined sales of tangible personal property for delivery in California by the retailer and all related persons, including nontaxable...","your_figures":{"period":"last_12_months","sales_counted":612000,"transactions_counted":3400},"marketplace_sales":"Counted: a marketplace seller must include its marketplace-facilitated sales together with its direct sales.","measurement_period":"previous or current calendar year (crossing in either counts)","percent_of_sales_threshold":122,"verified_on_primary_source":true,"percent_of_transaction_threshold":null,"register_by_date_if_crossed_today":"2026-10-21"}],"under_threshold":[{"name":"Texas","note":"Remote sellers may use a single local use tax rate instead of each local rate (not available to marketplace providers). To stop, a seller ne...","state":"TX","result":"Under the threshold.","source":"https://comptroller.texas.gov/taxes/sales/remote-sellers.php","threshold":"$500,000 in sales","what_counts":"Total Texas revenue: gross revenue from taxable and nontaxable sales of goods and services into Texas, including separately stated handling,...","your_figures":{"period":"last_12_months","sales_counted":90000,"transactions_counted":150},"marketplace_sales":"Counted: include all sales, marketplace sales too, even when the marketplace collects (stated as of 1 April 2020).","measurement_period":"any rolling 12 month period","percent_of_sales_threshold":18,"verified_on_primary_source":true,"percent_of_transaction_threshold":null}]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_pmvEUx3bH7_AxdCMWhLDE","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Determines which US states a remote seller must register in to collect sales tax based on economic nexus thresholds, given sales and transaction counts per state.","exampleAgentPrompt":"Check which US states I need to register in for sales tax — I sold $612,000 into California with 3,400 transactions and $85,000 into Texas with 900 transactions over the last 12 months, and those figures include marketplace sales through Amazon.","exampleUseCases":[{"title":"E-commerce seller nexus audit","prompt":"I'm a remote seller and want to know which states I've crossed the economic nexus threshold in. My last 12 months of sales include $750,000 and 6,200 transactions into Texas, $310,000 and 1,800 transactions into Florida, and $95,000 and 600 transactions into Ohio. All figures include Amazon marketplace sales — tell me where I need to register."},{"title":"Pre-expansion compliance check","prompt":"We're about to start shipping into several new states and need to know if our projected sales will trigger sales tax registration. For the previous calendar year we had $480,000 into New York with 2,100 transactions and $210,000 into Washington with 950 transactions, not including marketplace sales. Which states are we over or close to the threshold?"},{"title":"Marketplace seller exemption analysis","prompt":"I sell exclusively through Amazon and Etsy — can you check my economic nexus status for sales tax? I have $900,000 in sales and 5,000 transactions into California and $430,000 and 2,200 transactions into Illinois over the last 12 months. My sales figures include all marketplace-facilitated sales."}],"resultDescription":"A structured JSON response with a plain-English verdict, plus three lists: states where the seller must register (with threshold details, what counts, measurement period, registration deadline, revenue department source URL, and a breakdown of the seller's figures), states close to the threshold (80%+ of limit), and states under the threshold. Each entry includes the state name, threshold amount, measurement period, marketplace sales treatment, and a link to the primary government source.","failureModes":["Missing or malformed sales_by_state array returns a validation error","Invalid state codes in the sales data may be rejected or ignored","Date parameter outside the range of known threshold history may return no matching rule","Providing figures for a period that doesn't match the state's measurement period generates a depends_on warning rather than a definitive verdict","Extremely large arrays or malformed JSON objects in items may cause a 400 error"],"whenToPreferThis":"Choose this endpoint when you need to determine US state sales tax registration obligations for a remote seller based on economic nexus thresholds. It is specifically designed for the Wayfair-era economic nexus rules, handles marketplace facilitator exclusions per state, and links each determination to the primary government source — making it ideal for compliance automation, pre-expansion checks, or ongoing monitoring. Prefer it over a generic tax API when you need state-by-state threshold comparisons with sourced regulatory details rather than just a tax rate lookup.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-22T12:41:09.107Z","isFirstParty":false,"canonicalSlug":"us-sales-tax-economic-nexus-checker-e8665adb"}