# Attestr, free, Demo credits, POST /api/v1/public/corpx/gstin/search, Search GSTIN By Company Name: Business verification API > This API can be used for a reverse lookup of GSTIN number for a given company name. Attestr's business verification API on its Demo credits plan. It costs $0.00 per 1,000 companies. It returns 4 of the 11 key fields we check: Registered name, Status, Formation date, Principal address. We haven't run Attestr through [our business verification API benchmark](https://datacircle.dev/best-business-verification-api.txt) yet. This plan is free. We rank 821 plans for business verification APIs by price. Half the plans cost $7.895 per 1,000 companies or less. [EuroValidate's €149 monthly plan](https://datacircle.dev/business-verification-apis/eurovalidate/149-monthly-scale-post-v1-validate/llms.txt) is the cheapest paid plan per 1,000 companies: $0.017. EuroValidate's plan covers companies in 31 countries only. [Scoris's €19 pack](https://datacircle.dev/business-verification-apis/scoris/19-pack/llms.txt) covers any number of companies in 8 countries only. Scoris's €19 pack costs less up front than EuroValidate's €149 monthly plan. [GovFiles](https://datacircle.dev/business-verification-apis/govfiles/top-up/llms.txt), [Didit](https://datacircle.dev/business-verification-apis/didit/top-up-from-50/llms.txt) and [CompanyData.com](https://datacircle.dev/business-verification-apis/companydata-com/249-monthly/llms.txt) are the best business verification API providers in the Datacircle benchmark for companies in any country. - This page: https://datacircle.dev/business-verification-apis/attestr/free-demo-credits-post-api-v1-public-corpx-gstin-search-search-gstin-by-company-name - [Business verification API: the 11 best providers compared](https://datacircle.dev/best-business-verification-api.txt) - Get it: https://docs.attestr.com/attestr-docs/attestr-purchase-credits?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing - Request: `POST https://api.attestr.com/api/v1/public/corpx/gstin/search`, Search GSTIN By Company Name - API key: with the plan, on https://docs.attestr.com/attestr-docs/attestr-purchase-credits?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing - Its API docs: https://docs.attestr.com/attestr-docs/search-gstin-by-company-name-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing - Sold by: Attestr (https://attestr.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing) - Checked: 2026-11-05 ## In the answer - Completeness: 36% - Registered name: ✓ - Status: ✓ - Formation date: ✓ - Principal address: ✓ ## Price - $ per 1,000 companies: $0.00 - Billing: free ## Aggregators - Aggregators: none ## Charges - Also pays for: nothing else ## Not found - $ per 1,000: $0.00 ## In their words - Their pitch: This API can be used for a reverse lookup of GSTIN number for a given company name. ## Data - Countries: India - Keep data: no limit - Use data: You may use the Services and Outputs only for your internal business purposes relating to verification, due diligence, compliance and fraud prevention, and for presentations to your own clients strictly for their internal verification and fraud-prevention purposes. You must not, and must ensure your Permitted Users do not: verify or monitor any individual without valid consent or another lawful basis, copy, sell, sublicense, publish, redistribute or commercially exploit Outputs or verified data, or share them with anyone other than Permitted Users, without our prior written consent, use Personal Data or Outputs for marketing, profiling or any purpose other than the authorised verification purpose, combine Outputs with third-party datasets for resale, data brokerage or enrichment, or attempt to re-identify masked, tokenised or anonymised data, scrape, reverse engineer, decompile, circumvent rate limits or security controls, or probe or test the Services' security without our written permission, use the Services to build a competing product or dataset, or use the Services in breach of any law, including the DPDP Act, the Information Technology Act, 2000 and any KYC or sector regulations that apply to you. ## Plan - Pay: $0 ## Rate limit - Batch: 1 ## Speed - Answer: in the call ## The call - You send: legalName, Content-Type header "application/json" - Method: POST - Path: /api/v1/public/corpx/gstin/search ## About the plan - Plan: Demo credits - Who can get it: registered businesses whose access request Attestr approves ## The 12 fields the plan's answer can hold valid, message, GSTIN, active, status, legal name, trade name, PAN, constitution, registration type, registration date, primary address ## Attestr's plans (3) - [Attestr, free, Demo credits, POST /api/v1/public/corpx/gstin/search, Search GSTIN By Company Name](https://datacircle.dev/business-verification-apis/attestr/free-demo-credits-post-api-v1-public-corpx-gstin-search-search-gstin-by-company-name/llms.txt): $0.00 per 1,000, 36% complete - [Attestr, top-up, Pay as you go credits, POST /api/v1/public/corpx/gstin/search, Search GSTIN By Company Name](https://datacircle.dev/business-verification-apis/attestr/top-up-pay-as-you-go-credits-post-api-v1-public-corpx-gstin-search-search-gstin-by-company-name/llms.txt): 36% complete - [Attestr, contact us, Bulk pricing, POST /api/v1/public/corpx/gstin/search, Search GSTIN By Company Name](https://datacircle.dev/business-verification-apis/attestr/contact-us-bulk-pricing-post-api-v1-public-corpx-gstin-search-search-gstin-by-company-name/llms.txt): 36% complete ## Attestr's calls for this API (7) - `POST /api/v2/public/corpx/business/autocomplete`: [Attestr, free, Demo credits, POST /api/v2/public/corpx/business/autocomplete](https://datacircle.dev/business-verification-apis/attestr/free-demo-credits-post-api-v2-public-corpx-business-autocomplete/llms.txt) - `POST /api/v2/public/corpx/business/master`: [Attestr, free, Demo credits, POST /api/v2/public/corpx/business/master](https://datacircle.dev/business-verification-apis/attestr/free-demo-credits-post-api-v2-public-corpx-business-master/llms.txt) - `POST /api/v2/public/corpx/business/search`: [Attestr, free, Demo credits, POST /api/v2/public/corpx/business/search](https://datacircle.dev/business-verification-apis/attestr/free-demo-credits-post-api-v2-public-corpx-business-search/llms.txt) - `POST /api/v2/public/corpx/gstin`: [Attestr, free, Demo credits, POST /api/v2/public/corpx/gstin](https://datacircle.dev/business-verification-apis/attestr/free-demo-credits-post-api-v2-public-corpx-gstin/llms.txt) - `POST /api/v1/public/corpx/udyam`: [Attestr, free, Demo credits, POST /api/v1/public/corpx/udyam](https://datacircle.dev/business-verification-apis/attestr/free-demo-credits-post-api-v1-public-corpx-udyam/llms.txt) - `POST /api/v1/public/corpx/gstin/search`, Search GSTIN By Company Name: [Attestr, free, Demo credits, POST /api/v1/public/corpx/gstin/search, Search GSTIN By Company Name](https://datacircle.dev/business-verification-apis/attestr/free-demo-credits-post-api-v1-public-corpx-gstin-search-search-gstin-by-company-name/llms.txt) - `POST /api/v1/public/corpx/gstin/search`, Search GSTIN By PAN Number: [Attestr, free, Demo credits, POST /api/v1/public/corpx/gstin/search, Search GSTIN By PAN Number](https://datacircle.dev/business-verification-apis/attestr/free-demo-credits-post-api-v1-public-corpx-gstin-search-search-gstin-by-pan-number/llms.txt) ## Attestr's APIs (2) - [Attestr: company enrichment API pricing, 3 plans, POST /api/v2/public/corpx/itr](https://datacircle.dev/company-enrichment-apis/attestr/free-demo-credits-post-api-v2-public-corpx-itr/llms.txt) - [Attestr: company enrichment API pricing, 3 plans, POST /api/v2/public/lookup/pan-to-cin](https://datacircle.dev/company-enrichment-apis/attestr/free-demo-credits-post-api-v2-public-lookup-pan-to-cin/llms.txt) - [Attestr: business verification API pricing, 3 plans, v1/public/corpx/gstin/search, Search GSTIN By Company Name](https://datacircle.dev/business-verification-apis/attestr/free-demo-credits-post-api-v1-public-corpx-gstin-search-search-gstin-by-company-name/llms.txt) ## Attestr: business verification API alternatives - [INSEE, free](https://datacircle.dev/business-verification-apis/insee/free/llms.txt): $0.00 per 1,000, 45% complete, 24 hours - [Hlidac statu, free, Zdarma, GET /api/v2/firmy/GetDetailInfo](https://datacircle.dev/business-verification-apis/hlidac-statu/free-zdarma-get-api-v2-firmy-getdetailinfo/llms.txt): $0.00 per 1,000, 27% complete - [Scoris, free](https://datacircle.dev/business-verification-apis/scoris/free/llms.txt): $0.00 per 1,000, 18% complete, 1 week - [Pushbuild, free, POST /uk-companies-house/run](https://datacircle.dev/business-verification-apis/pushbuild/free-post-uk-companies-house-run/llms.txt): $0.00 per 1,000, 64% complete ## Sources From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-05. - https://attestr.com/platform/api-platform?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing - https://attestr.com/platform/business-kyc?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing - https://attestr.com/terms-of-service?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing - https://docs.attestr.com/attestr-docs/attestr-introduction.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing - https://docs.attestr.com/attestr-docs/attestr-purchase-credits.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing - https://docs.attestr.com/attestr-docs/attestr-rate-limits.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing - https://docs.attestr.com/attestr-docs/attestr-self-signup.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing - https://docs.attestr.com/attestr-docs/search-gstin-by-company-name-api.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing