{"id":"c15fc15d-5ce1-479d-b321-021f1b9f08a0","shortId":"7zF972","kind":"mpp","title":"Validate EU VAT numbers, calculate VAT rates, and look up VAT categories via MPP.","tagline":"Validate EU VAT numbers, calculate VAT rates, and look up VAT categories via MPP.","description":"This endpoint validates European Union VAT numbers through the Abstract API, proxied via the Locus MPP (Micropayment Protocol) gateway. It accepts a VAT number as input and returns validation results. The broader service also includes sibling endpoints for VAT rate calculation (given an amount and country code) and VAT category lookup by country.\n\nThe service is part of a three-endpoint VAT suite hosted at abstract-vat.mpp.paywithlocus.com. The /validate endpoint takes a JSON body with a `vat_number` string. The /calculate endpoint accepts an amount, country code, optional VAT-inclusive flag, and optional VAT category. The /categories endpoint returns available VAT categories for a given country code. All three endpoints are POST-only and priced at 6,000 base units of pathUSD (0x20c…) on Tempo L2, which equals $0.006 per call (pathUSD uses 6 decimals).\n\nNote: The probe attempted HEAD and GET on the /validate path and received 404s, which is expected since the OpenAPI spec declares POST as the only method. The endpoint is likely live for POST requests with a valid MPP payment header. No response schema is documented, so the exact shape of successful responses must be inferred from the upstream Abstract API documentation.","tags":["vat","tax","eu-compliance"],"capabilities":["vat-number-validation","vat-rate-calculation","vat-category-lookup","eu-tax-data","post-only","mpp-tempo-settlement"],"categories":["data","finance"],"synonyms":["VAT validation","VAT number check","EU VAT rate","tax ID verification","value added tax","VIES lookup","VAT calculator","European tax API"],"warnings":["Probe returned 404 on HEAD and GET; endpoint is POST-only so liveness is unconfirmed but likely","No response schema documented — callers must infer response shape from upstream Abstract API docs","Currency address 0x20c000000000000000000000b9537d11c60e8b50 assumed to be pathUSD with 6 decimals; if different, price calculation would change"],"endpointUrl":"https://abstract-vat.mpp.paywithlocus.com/abstract-vat/validate","protocol":"mpp","transport":"http","auth":{"type":"mpp","details":{"realm":"abstract-vat.mpp.paywithlocus.com","intent":"charge","method":"tempo","service_methods":{"tempo":{"assets":["0x20c000000000000000000000b9537d11c60e8b50"],"intents":["charge"]}}}},"qualityScore":"0.500","qualityRationale":"The OpenAPI spec provides clear request schemas and pricing for all three endpoints, but no response schemas or examples are documented. The probe only tested HEAD/GET (both 404), while the endpoint is POST-only, so liveness via POST is plausible but unconfirmed. Crawled pages returned generic 404 JSON, offering no additional 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'/categories':126 '/validate':97,175 '0.006':159 '000':148 '0x20c':153 '404s':179 '6':147,164 'EU VAT rate' 'European tax API' 'VAT calculator' 'VAT number check' 'VAT validation' 'VIES lookup' 'abstract':38,225 'abstract-vat.mpp.paywithlocus.com':95 'accept':49,111 'also':62 'amount':72,113 'api':39,226 'attempt':169 'avail':129 'base':149 'bodi':102 'broader':60 'calcul':5,19,69 'call':161 'categori':12,26,78,124,131 'code':75,115,136 'countri':74,81,114,135 'decim':165 'declar':187 'document':211,227 'endpoint':30,65,90,98,110,127,139,194 'equal':158 'eu':2,16 'eu-tax-data' 'european':32 'exact':214 'expect':182 'flag':120 'gateway':47 'get':172 'given':70,134 'head':170 'header':206 'host':93 'includ':63 'inclus':119 'infer':221 'input':54 'json':101 'l2':156 'like':196 'live':197 'locus':43 'look':9,23 'lookup':79 'method':192 'micropay':45 'mpp':14,28,44,204 'mpp-tempo-settlement' 'must':219 'note':166 'number':4,18,35,52,106 'openapi':185 'option':116,122 'part':85 'path':176 'pathusd':152,162 'payment':205 'per':160 'post':142,188,199 'post-on':141 'post-only' 'price':145 'probe':168 'protocol':46 'proxi':40 'rate':7,21,68 'receiv':178 'request':200 'respons':208,218 'result':58 'return':56,128 'schema':209 'servic':61,83 'shape':215 'sibl':64 'sinc':183 'spec':186 'string':107 'success':217 'suit':92 'take':99 'tax ID verification' 'tempo':155 'three':89,138 'three-endpoint':88 'union':33 'unit':150 'upstream':224 'use':163 'valid':1,15,31,57,203 'value added tax' 'vat':3,6,11,17,20,25,34,51,67,77,91,105,118,123,130 'vat-category-lookup' 'vat-inclus':117 'vat-number-validation' 'vat-rate-calculation' 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-X POST https://abstract-vat.mpp.paywithlocus.com/abstract-vat/validate \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-Payment: <MPP_TEMPO_TOKEN>\" \\\n  -d '{\"vat_number\": \"DE123456789\"}'","exampleRequest":{"vat_number":"DE123456789"},"exampleResponse":null,"schema":{"path":"/abstract-vat/validate","method":"POST","payment":{"amount":"6000","intent":"charge","method":"tempo","currency":"0x20c000000000000000000000b9537d11c60e8b50","decimals":6,"unitType":"request","description":"Validate"},"description":"Validate"},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The OpenAPI spec declares three POST endpoints: /validate, /calculate, /categories","source_url":"https://abstract-vat.mpp.paywithlocus.com"},{"claim":"Each call costs 6000 base units of pathUSD on Tempo L2","source_url":"https://abstract-vat.mpp.paywithlocus.com"},{"claim":"Upstream API documentation is at https://docs.abstractapi.com/vat","source_url":"https://www.abstractapi.com/api/vat-validation-rates-api"},{"claim":"LLM-oriented docs referenced at https://beta.paywithlocus.com/mpp/abstract-vat.md","source_url":"https://beta.paywithlocus.com/mpp/abstract-vat.md"}],"useCases":["Validate a customer's EU VAT number before applying a B2B tax exemption at checkout","Calculate the correct VAT amount for a given price and EU country","Retrieve the list of VAT categories (standard, reduced, etc.) for a specific EU member state","Automate tax compliance checks in invoicing or accounting workflows","Verify VAT registration status for KYC/onboarding flows"],"bestFor":["E-commerce platforms selling into the EU that need real-time VAT validation","Accounting and invoicing tools requiring per-country VAT rate lookups","Agents or bots that need pay-per-call tax data without API key management"],"notFor":["Non-EU tax lookups (US sales tax, GST, etc.)","High-volume batch validation where per-call pricing may add up","Use cases requiring detailed response schema guarantees (response schema is undocumented)"],"kindDetails":{"docs":{"llmsTxt":"https://paywithlocus.com/mpp/abstract-vat.md","homepage":"https://docs.abstractapi.com/vat"},"tags":["vat","tax","eu-compliance"],"realm":"abstract-vat.mpp.paywithlocus.com","status":"active","methods":{"tempo":{"assets":["0x20c000000000000000000000b9537d11c60e8b50"],"intents":["charge"]}},"provider":{"url":"https://www.abstractapi.com/api/vat-validation-rates-api","name":"VAT"},"categories":["data"],"service_id":"abstract-vat","integration":"third-party","service_name":"VAT","service_description":"VAT number validation, rate calculation, and category lookup for EU."},"updatedAt":"2026-04-22T01:15:15.474Z"}}