# Pyxmark, free, POST /mcp, due_diligence_report: Business verification API

> One-call due-diligence report: SEC profile (if public), sanctions screen, federal exclusions, domain signals (registration age, email records, Wayback Machine first-seen date), and state registry link, with a red-flag summary, a verdict (clear / review / hold) and source links.

Pyxmark's Free plan for the business verification API costs $0.00 per 1,000 companies. We check each provider's docs for 11 fields. Pyxmark's docs list 2: Registered name, Principal address.
We haven't run Pyxmark through [our business verification API benchmark](https://datacircle.dev/best-business-verification-api.txt) yet.
We rank 1,710 plans for business verification APIs by price. Half the plans cost $7.895 or less per 1,000 companies. This plan and 224 others tie for the lowest price per 1,000 companies of the 1,710 plans. [See the best free business verification API plan.](https://datacircle.dev/best-business-verification-api.txt)
[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 SafeDeal's ₸50,000 (about $110) 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/pyxmark/free-post-mcp-due-diligence-report
- [Business verification API in 2026: the 8 best compared](https://datacircle.dev/best-business-verification-api.txt)
- Get it: https://mcp.pyxmark.com/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- Request: `POST https://mcp.pyxmark.com/mcp`, due_diligence_report
- API key: not needed
- Its API docs: https://mcp.pyxmark.com/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- Sold by: Pyxmark (https://pyxmark.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing)
- Checked: 2026-11-10

## In the answer

- Completeness: 18%
- Registered name: ✓
- Principal address: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: search_company · company_profile · screen_sanctions · check_exclusions · domain_age · state_registry_link

## Not found

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

## In their words

- Their pitch: One-call due-diligence report: SEC profile (if public), sanctions screen, federal exclusions, domain signals (registration age, email records, Wayback Machine first-seen date), and state registry link, with a red-flag summary, a verdict (clear / review / hold) and source links.

## Data

- Freshness: 1 day (domain age, MX records, SPF record, DMARC record, first archived date: live)
- Countries: United States
- Keep data: no limit
- Use data: Pyxmark is not a consumer reporting agency, and its results are not consumer reports under the Fair Credit Reporting Act (FCRA). Don't use Pyxmark, or anything it returns, to decide whether a person gets credit, a job, housing, insurance or a tenancy, or for any other purpose covered by the FCRA or similar state laws. [...] Single checks are free, up to 25 lookups a day per IP address. Every tool call counts as one lookup, and the limit resets at 00:00 UTC. We may also cap total free use per day. Don't try to get around the limits, overload the service, or resell or bulk-scrape results.

## Plan

- Pay: $0
- You get: 25 requests a day
- Enough for: 25 calls a day

## Rate limit

- Per day: 25
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: method "tools/call", params.name "due_diligence_report", one of params.arguments.name, params.arguments.domain, params.arguments.cik or params.arguments.ticker. Optional: params.arguments.state, params.arguments.dob, params.arguments.birth_year, params.arguments.nationality, params.arguments.country, params.arguments.address, params.arguments.email, params.arguments.phone, params.arguments.website, params.arguments.ids, params.arguments.owners, params.arguments.subject_type
- Method: POST
- Path: /mcp

## About the plan

- Plan: Free
- Who can get it: anyone, with no sign-up or key

## The 22 fields the plan's answer can hold

legal name, SIC industry, state of incorporation, business address, revenue, net income, total assets, cash, recent filings, sanctions matches, federal exclusion matches, domain age, MX records, SPF record, DMARC record, first archived date, state registry link, address density, red flags, verdict, verdict reasons, source links

## Pyxmark's plans (1)

- [Pyxmark, free, POST /mcp, due_diligence_report](https://datacircle.dev/business-verification-apis/pyxmark/free-post-mcp-due-diligence-report/llms.txt): $0.00 per 1,000, 18% complete, 1 day (domain age, MX records, SPF record, DMARC record, first archived date: live)

## Pyxmark's calls for this API (2)

- `POST /mcp`, company_profile: [Pyxmark, free, POST /mcp, company_profile](https://datacircle.dev/business-verification-apis/pyxmark/free-post-mcp-company-profile/llms.txt)
- `POST /mcp`, due_diligence_report: [Pyxmark, free, POST /mcp, due_diligence_report](https://datacircle.dev/business-verification-apis/pyxmark/free-post-mcp-due-diligence-report/llms.txt)

## Pyxmark's APIs (2)

- [Pyxmark: domain WHOIS API pricing, 1 plan](https://datacircle.dev/domain-whois-apis/pyxmark/free/llms.txt)
- [Pyxmark: business verification API pricing, 1 plan, POST /mcp, due_diligence_report](https://datacircle.dev/business-verification-apis/pyxmark/free-post-mcp-due-diligence-report/llms.txt)

## Pyxmark: 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
- [Paianjenul, free, check_vat](https://datacircle.dev/business-verification-apis/paianjenul/free-check-vat/llms.txt): $0.00 per 1,000, 0% complete, live
- [CompanyVerify, free pilot, GET /v1/uk/company/search](https://datacircle.dev/business-verification-apis/companyverify/free-pilot-get-v1-uk-company-search/llms.txt): $0.00 per 1,000, 55% complete, 24 hours
- [eucompliance.tools, free, no key, GET /free/company](https://datacircle.dev/business-verification-apis/eucompliance-tools/free-no-key-get-free-company/llms.txt): $0.00 per 1,000, 55% 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 2026-11-10.

- https://mcp.pyxmark.com/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://mcp.pyxmark.com/.well-known/mcp/server-card.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://pyxmark.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://pyxmark.com/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://pyxmark.com/methodology?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://pyxmark.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing