# Singula, free: Business verification API

> Tax and personal identity. CURP against RENAPO, RFC against the SAT and e.firma validity.

Singula's Free account credit plan for the business verification API costs $0.00 per 1,000 companies. We check each provider's docs for 11 fields. Singula's docs list 1: Tax ID.
We haven't run Singula through [our business verification API benchmark](https://datacircle.dev/best-business-verification-api.txt) yet.
This plan is free. We rank 719 plans for business verification APIs by price. Half the plans cost $10.00 or less per 1,000 companies. [211 business verification API plans on our price sheet are free.](https://datacircle.dev/best-business-verification-api.txt) [GovFiles](https://datacircle.dev/business-verification-apis/govfiles/free/llms.txt) has a free plan with 1,000 results. GovFiles is the best business verification API in our benchmark for companies in any country.
[Jsonpage's €129 monthly plan](https://datacircle.dev/business-verification-apis/jsonpage/129-monthly-pro-get-v2-validate/llms.txt) is the cheapest paid plan per 1,000 companies, for 33 countries only, with no charge per call. You get as many companies as Jsonpage's rate limit allows. [ApiZero's CNY 399 yearly plan](https://datacircle.dev/business-verification-apis/apizero/cny-399-yearly-diamond-membership-get-api-company-search/llms.txt) costs the least for 10,000 companies a month: about $4.97.
[eucompliance.tools' €20 monthly plan (/v1/vat)](https://datacircle.dev/business-verification-apis/eucompliance-tools/20-monthly-business-get-v1-vat/llms.txt) covers any number of companies, and costs less up front than Jsonpage's €129 monthly plan.
[GovFiles](https://datacircle.dev/business-verification-apis/govfiles/top-up/llms.txt), [CompanyData.com](https://datacircle.dev/business-verification-apis/companydata-com/249-monthly/llms.txt) and [Didit](https://datacircle.dev/business-verification-apis/didit/top-up-from-50/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/singula/free
- [Business verification API in 2026: the 8 best compared](https://datacircle.dev/best-business-verification-api.txt)
- Get it: https://singula.mx/en/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- Request: `POST https://api.singula.mx/app/rfc/validate`
- API key: with the plan, on https://singula.mx/en/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- Its API docs: https://singula.mx/en/docs/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing#s-rfc-validar-rfc-contra-el-sat-sin-customer
- Sold by: Singula (https://singula.mx?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing)
- Checked: 2026-11-11

## In the answer

- Completeness: 9%
- Tax ID: ✓

## Price

- $ per 1,000 companies: $0.00
- Per: call
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: CURP from a person's details · CURP validated against RENAPO · RFC for an individual · RFC for a company · e.firma and digital seals validity · INE read and checked against the Lista Nominal · Identity verification with liveness · SPEI transfer tracked with Banxico · Verified certificate of tax status · Reading one document · Verified power of attorney · Electronic signature of a document · Sanction lists, PEP and the SAT registries · Judicial records of a person · Judicial records of a company · Phone: validity, carrier and type · Email verified by a code · Email footprint · Premium phone: HLR, presence and breaches · Digital footprint · Digital footprint Premium

## Overage

- Units cap: hard

## Not found

- $ per 1,000 calls that find nothing: $0.00

## In their words

- Their pitch: Tax and personal identity. CURP against RENAPO, RFC against the SAT and e.firma validity.

## Data

- Freshness: live
- Countries: Mexico
- Keep data: no limit
- Use data: The User agrees to: Use the API and Platform solely for legitimate and lawful purposes. Not attempt to access data belonging to other users. Not reverse engineer, decompile, or disassemble any part of the Platform or API. Not exceed the established usage limits or attempt to circumvent rate limits. Comply with all applicable laws and regulations, including data protection laws. Not use the services for any discriminatory or illegal profiling purposes.

## Plan

- Pay: MX$0
- You get: 100 credits
- Enough for: about 33 calls, once
- Expires: 30 days

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: rfc
- Method: POST
- Path: /app/rfc/validate

## About the plan

- Plan: Free account credit
- Who can get it: anyone with a company email domain: "For corporate domains, on confirming the email", granted once in that domain's lifetime, Gmail, Outlook, Yahoo and disposable inboxes get the test environment only

## The 4 fields the plan's answer can hold

tax ID valid, registered, register message, request ID

## Singula's plans (2)

- [Singula, free](https://datacircle.dev/business-verification-apis/singula/free/llms.txt): $0.00 per 1,000, 9% complete, live
- [Singula, top-up from MX$200](https://datacircle.dev/business-verification-apis/singula/top-up-from-mx-200/llms.txt): $163.188 per 1,000, 9% complete, live

## Singula's calls for this API (1)

- `POST /app/rfc/validate`: [Singula, free](https://datacircle.dev/business-verification-apis/singula/free/llms.txt)

## Singula's APIs (2)

- [Singula Business verification API pricing, 2 plans](https://datacircle.dev/business-verification-apis/singula/free/llms.txt)
- [Singula Phone validation API pricing, 2 plans, POST /app/phone-lookup](https://datacircle.dev/validate-phone-apis/singula/free-account-credit-post-app-phone-lookup/llms.txt)
- [Singula Phone validation API pricing, 2 plans, POST /app/phone-lookup-premium](https://datacircle.dev/validate-phone-apis/singula/free-account-credit-post-app-phone-lookup-premium/llms.txt)

## Singula: business verification API alternatives

[Singula alternatives: every business verification API plan in Mexico compared](https://datacircle.dev/business-verification-api-pricing/mexico.md)

We list Singula's cheapest paid plan first. Next we list other providers' plans closest to Singula in price per 1,000 companies. Each plan in the list gives live data.

- [Singula, top-up from MX$200](https://datacircle.dev/business-verification-apis/singula/top-up-from-mx-200/llms.txt): $163.188 per 1,000, 9% complete, live
- [Infogreffe, top-up from €100, Pack À la demande, GET /api/v1/Entreprise/FicheIdentite/{id}](https://datacircle.dev/business-verification-apis/infogreffe/top-up-from-100-pack-a-la-demande-get-api-v1-entreprise-ficheidentite-id/llms.txt): $112.53 per 1,000, 18% complete, live
- [RFCCheck, top-up, Pay as you go, POST /v1/rfc/validate, Validate an RFC](https://datacircle.dev/business-verification-apis/rfccheck/top-up-pay-as-you-go-post-v1-rfc-validate-validate-an-rfc/llms.txt): $150.00 per 1,000, 27% complete, live
- [Verificamex, top-up from MX$312,375](https://datacircle.dev/business-verification-apis/verificamex/top-up-from-mx-312375/llms.txt): $169.92 per 1,000, 18% complete, live
- [TIN Comply, $1,000 monthly, Enterprise Premium, POST /api/v1/validate/irs-tin-name-matching](https://datacircle.dev/business-verification-apis/tin-comply/1000-monthly-enterprise-premium-post-api-v1-validate-irs-tin-name-matching/llms.txt): $200.00 per 1,000, 0% complete, live

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-11.

- https://singula.mx/en/developers?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://singula.mx/en/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://singula.mx/en/docs/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://singula.mx/en/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://singula.mx/en/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing