{"uid":"cap_mkDOuyvmR-dx_68naP9P1","slug":"india-gstin-format-validation-api-33b51fb1","name":"India GSTIN Format Validation API","description":"Pay-per-call India business and identity verification: IFSC, pincode, and GSTIN format validation. Powered by x402 — pay in USDC on Base.","url":"https://verifyapi.hillguava.xyz/verify/gstin-format/%7Bgstin%7D","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"gstin":"27AAPFU0939F1ZV","state":"Maharashtra","valid":true,"pan_holder_type":"Firm/LLP"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_5pDIxwSsmtTGq26-U0IiS","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates a GSTIN (Goods and Services Tax Identification Number) by checking its format, extracting the embedded state code, PAN, and entity type, and verifying the Luhn-mod-36 checksum.","exampleAgentPrompt":"Can you check if the GSTIN 27AAPFU0939F1ZV is valid and tell me which state it belongs to and what type of entity it is?","exampleUseCases":null,"resultDescription":"Returns a JSON object with the input GSTIN, a boolean `valid` field, the decoded `state` name (e.g. Maharashtra), and `pan_holder_type` (e.g. Firm/LLP), confirming format correctness including the Luhn-mod-36 checksum.","failureModes":["Invalid or malformed GSTIN returns valid=false","GSTIN with incorrect length or characters returns an error or invalid response","Non-existent or unrecognized state code returns invalid","Network/payment failure returns HTTP 402 if USDC payment not provided","Rate limiting or server errors return 5xx responses"],"whenToPreferThis":"Use this endpoint when you need to validate an Indian GSTIN number for format correctness, extract the embedded state and PAN holder type, or perform pre-invoice GST compliance checks without needing live government database lookup. Ideal for lightweight, pay-per-call format validation at $0.005 USDC.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T18:30:02.999Z","isFirstParty":false}