# GST Verification API India | GSTIN & KYB Checks | FastKYC > GST verification API for India: GSTIN search and filing status from GSTN, GST by PAN, MSME Udyam, CIN, IEC and FSSAI checks for business (KYB) onboarding. Source: https://www.fastkyc.com/products-gst/ --- # GST verification and KYB API for vendor and merchant onboarding GSTIN search, filing status, GST by PAN, MSME Udyam, CIN, IEC and FSSAI checks: business verification from official sources, in real time. [Book a Demo](/book-demo/) [What you can verify](#verify) Includes - Validate GSTINs instantly from trusted government sources - Ensure dealer authenticity and compliance with ease - APIs that are secure, accurate, and simple to integrate - - - - - - Why FastKYC ## Simple and Secure GST Verification Our platform ensures accurate GST number validation and compliance, making verification effortless, reliable, and business-ready. Here’s why businesses trust us: - ### GSTIN Licensed Stay compliant with confidence - Fast KYC GST APIs are government-approved, secure, and built to simplify your GST verification process. - ### Multiprotocol Label Switching Benefit from multiple failover systems that guarantee uninterrupted operations, minimizing downtime and ensuring business continuity. - ### Real-Time Data Access Access live data directly from the GST Network for unmatched accuracy, compliance, and timeliness. - ### Secure Encryption & Decryption FastKYC handles encryption, decryption, and network complexities, so you can focus on your business while we keep your data secure. Know your business ## Accelerate Trust In today’s fast-paced business environment, verifying the authenticity of your partners whether they’re buyers, sellers, or collaborators is critical. With FastKYC business verification (KYB) APIs, you can instantly confirm a business exists, is registered and is run by who it says, and stay compliant. 1. ### Verify GST-Registered Businesses Authenticate businesses in real-time using their GSTIN, directly from trusted government sources, with filing history where you need it. 2. ### Complete the KYB picture Add MSME Udyam registration, company CIN and director DIN from MCA records, Import Export Code and FSSAI licence checks from the same catalogue. What you can verify ## GST Verification(No PAN Input) Authenticate GST details instantly without requiring PAN input. - Verify GSTIN details with government sources. - Reduce tax fraud risks. ## Common questions about GST Verification What is a GST verification API? An API that checks a GSTIN against GST records and returns the registered legal name, trade name, address, registration status and type. The GST Advanced API adds filing history and compliance, promoter details, turnover data and e-invoice applicability for deeper vendor and merchant checks. How do I find a GSTIN from a PAN or a business name? Use GSTIN by PAN to list every GSTIN registered to a PAN, state by state, with the status of each; GSTIN by Name to search by business name across states; or Mobile to GST to find a GSTIN from a mobile number. Can I check GST return filing status? Yes. The GST Advanced API returns filing history and compliance for a GSTIN, and the GSTR-1A, 2A, 2B and 3B data APIs return the filed return details for a GSTIN and return period, for reconciliation and credit checks. What is KYB and which business checks are included? KYB (know your business) is KYC for a company: proving it exists, is registered and is run by who it says. Beyond GST, FastKYC covers MSME Udyam registration (by Udyam number, PAN or mobile), company CIN and director DIN from MCA records, Import Export Code, FSSAI licence, TAN, LEI and bank account verification for the payout account. How is this different from looking a GSTIN up on the GST portal? The portal is one manual lookup at a time. The API returns the registration data as JSON inside your onboarding flow, so every vendor or merchant is checked at signup and can be re-checked on a schedule without anyone copying numbers. Can GST verification be done in bulk? Yes. The GST Verify API is a lightweight validation built for high-volume merchant and vendor checks, and every API can be called in parallel from your own system. How much does GST verification cost? Pricing is per verification and depends on volume and the checks you use. Share your expected monthly volume and the team sends a rate card. APIs ## The APIs behind GST and business verification Every check on this page is a catalogue API with its own page: request, response, use cases and FAQs. [All Merchant APIs](/apis/merchant/) [Cancel e-Way Bill API](/apis/cancel-eway-bill/ "Cancel an existing e-Way Bill with the required cancellation details, when an order is called off or a bill was raised with the wrong details.")[Company Name to CIN API](/apis/company-to-cin/ "Find a company's Corporate Identity Number and registration status by searching its name in the MCA registry, without asking the business for its CIN.")[FSSAI Validation API](/apis/fssai-validation/ "Verify an FSSAI licence number and retrieve the food business's registration details, category and validity before onboarding restaurants or sellers.")[GST Advanced API](/apis/gst-verification-advanced/ "Enhanced GSTIN verification with compliance and filing history, promoter details, turnover data and e-invoice applicability for deeper KYB checks.")[GST Request OTP API](/apis/gst-request-otp/ "Request a GST authentication OTP using a taxpayer's GST username, to start consent-based GST portal verification from inside your own onboarding flow.")[GST Submit OTP API](/apis/gst-submit-otp/ "Validate the GST authentication OTP with the client ID to complete GST portal authentication, the second step after GST Request OTP.")[GST Verification API](/apis/gst-verification/ "Verify a GST number and retrieve the registered business name, address, status and registration details from GST records.")[GST Verify API](/apis/gst-verify/ "Quickly verify a GST number and return the core business information, a lightweight validation built for high-volume merchant and vendor checks.")[GSTIN By Name API](/apis/gst-by-name/ "Find every GSTIN registered against a business name across Indian states, with the status of each registration, when a merchant can't share its GSTIN.")[GSTIN By Pan API](/apis/gst-by-pan/ "Retrieve every GSTIN linked to a PAN, with the state and current status of each registration, to see a business's full GST footprint in one call.")[Generate e-Way Bill API](/apis/generate-eway-bill/ "Generate a GST-compliant e-Way Bill from invoice and transport details, returning the bill number and validity so goods can move without delays.")[IEC Advanced API](/apis/iec-advanced/ "Retrieve exporter and firm details from an Import Export Code, confirming a business is authorised for foreign trade before you onboard or pay it.")[IEC Basic API](/apis/iec-basic/ "Look up Import Export Code details with basic stakeholder information for a registered trading entity, a quick check for importers and exporters.")[MSME Verification API](/apis/msme-verification/ "Verify an MSME Udyam registration and retrieve official enterprise details, classification and registered address for MSME lending and onboarding.")[Mobile To Prefill API](/apis/mobile-to-prefill/ "Prefill a customer's KYC profile from a mobile number, returning name, contact details, addresses and demographic attributes.")[Mobile to MSME API](/apis/mobile-to-msme/ "Find the MSME Udyam registration linked to a mobile number from official government and business registry sources, without asking for the Udyam number.")[PAN to Udyam Details API](/apis/pan-to-udyam/ "Fetch Udyam registration and enterprise details for a business using only its PAN, without needing the Udyam number, for MSME lending and onboarding.")[Renew e-Way Bill API](/apis/renew-eway-bill/ "Extend the validity of an existing e-Way Bill by updating its transport and consignment details, so a delayed shipment stays compliant on the road.")[Udyog Aadhaar Verification API](/apis/udyog-aadhaar-verify/ "Verify a legacy Udyog Aadhaar registration using its UAM number and retrieve the registered enterprise details, for older MSME registrations.")[Update e-Way Bill API](/apis/update-eway-bill/ "Update vehicle and transport details in Part B of an existing e-Way Bill, so goods keep moving when the vehicle or transporter changes on the way.")[e-Way Bill Fetch API](/apis/eway-bill-fetch/ "Fetch an e-Way Bill's details using its e-Way Bill number, to check a consignment's movement before you accept, ship or pay for the goods.") API catalog ## Every check we run, grouped two ways By what the API verifies, or by who it is built for. The same APIs, reached from whichever direction you are starting. [Browse all APIs](/apis/) ### By category - [Banking Bank account verification APIs for India: penny drop, penny-less and hybrid checks, IFSC search and UPI lookups for safer payouts and onboarding.](/apis/banking/) - [Employment Employment verification APIs built on EPFO records: UAN lookups, full employment history and current employer checks for lenders and HR teams.](/apis/employment/) - [Finance Financial verification APIs for lenders: CIBIL, Experian and CRIF credit reports, ITR and Form 26AS downloads, CKYC records and tax compliance checks.](/apis/finance/) - [Identity Identity verification APIs for India: PAN, Aadhaar, passport, driving licence, voter ID and vehicle RC checks, plus mobile, email and court record lookups.](/apis/identity/) - [Merchant Business verification APIs for merchant onboarding: GSTIN, MSME and Udyam, FSSAI, Import Export Code and company registry checks from official sources.](/apis/merchant/) - [Mobile Mobile number verification APIs: OTP generation and validation to prove ownership, plus Mobile 360 profiles that build a customer view from one number.](/apis/mobile/) - [SMS SMS compliance API to check mobile numbers against the Mobile Number Revocation List, so OTPs and alerts never reach disconnected or reassigned numbers.](/apis/sms/) - [Utility Utility verification APIs: vehicle RC by chassis or engine, e-challans, electricity bills, BIN lookups, geo-fencing and face liveness for fraud checks.](/apis/utility/) - [Vision Document OCR and face APIs: extract data from Aadhaar, PAN, passports, cheques, invoices and bank statements, match selfies to IDs and mask Aadhaar.](/apis/vision/) ### By industry [Lending & NBFC](/industries/lending/)[Banking](/industries/banking/)[Fintech & Payments](/industries/fintech-payments/)[Insurance](/industries/insurance/)[Gaming & Fantasy Sports](/industries/gaming/)[Crypto & Web3](/industries/crypto/)[Staffing & HR](/industries/staffing-hr/)[Marketplaces & E-commerce](/industries/marketplaces/)[Telecom](/industries/telecom/)[Real Estate & Rentals](/industries/real-estate/)[Healthcare](/industries/healthcare/)[Logistics & Mobility](/industries/logistics/)