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datanexusmcp

DataNexus MCP

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DataNexus MCP

AI-Ready public data intelligence via the Model Context Protocol.

30 tools across 7 verticals. Verified sources. Token-efficient AI-Ready Markdown. No API key required for most tools.

What DataNexus does

DataNexus gives AI agents structured access to authoritative public data — IRS filings, CVE databases, patent offices, government contract records, regulatory dockets, domain registries, and professional licence registries. Every response is pre-formatted as AI-Ready Markdown optimised for LLM consumption.

How to connect

Claude Desktop / Cursor / Windsurf

{
  "mcpServers": {
    "datanexus": {
      "url": "https://datanexusmcp.com/mcp",
      "transport": "streamable-http"
    }
  }
}

Via npx (bridges HTTP → stdio for clients that need it)

npx -y @datanexusmcp/mcp-server

Server URL

https://datanexusmcp.com/mcp

Start here — find the right tool

Before calling any specific tool, use search_datanexus_tools to find what you need:

search_datanexus_tools("research a US nonprofit by EIN")
search_datanexus_tools("check open source package for CVEs")
search_datanexus_tools("find government contract awards for a vendor")

This reduces the context load from ~40,000 tokens to ~800 tokens and routes you to the exact tool and parameters needed.

Tool groups

Nonprofit — nonprofit_ prefix

Sources: IRS EO BMF, IRS TEOS, UK Charity Commission (OGL v3)

Tool

What it does

nonprofit_fetch_nonprofit_by_ein

IRS 990 data for any US nonprofit by EIN — name, revenue, expenses, assets, NTEE code

nonprofit_search_nonprofits_by_name

Search US nonprofits by name with optional state filter — returns up to 25 results

nonprofit_fetch_charity_uk

UK registered charity details — registration status, income, activities

Example

nonprofit_fetch_nonprofit_by_ein("13-1837418")

Security — security_ prefix

Sources: Google OSV.dev, NIST NVD, deps.dev

Tool

What it does

security_fetch_package_vulnerabilities

All CVEs for a package version across PyPI, npm, Maven, Go, Cargo, NuGet, RubyGems

security_fetch_cve_detail

Full CVE detail by ID — description, CVSS score, affected products, patch references

security_fetch_dependency_graph

Full dependency tree for a package version

security_audit_sbom_vulnerabilities

Audit a CycloneDX or SPDX SBOM against OSV.dev

security_fetch_package_licence

SPDX licence identifier for any package version

Example

security_fetch_package_vulnerabilities("requests", "2.28.0", "PyPI")
security_fetch_cve_detail("CVE-2023-32681")

Vulnerability data is for informational and research purposes. Verify with your security team before making decisions.

Compliance — compliance_ prefix

Sources: NPPES NPI Registry (CMS), FINRA BrokerCheck, SAM.gov

Tool

What it does

compliance_fetch_npi_provider

NPI registration details for any US healthcare provider

compliance_search_npi_by_name

Search NPI registry by name with state and speciality filters

compliance_fetch_finra_broker

FINRA BrokerCheck registration by CRD number — qualifications, disclosures

compliance_check_sam_exclusion

Check if an entity is on the federal exclusions list

Example

compliance_fetch_npi_provider("1003000126")
compliance_check_sam_exclusion("Acme Corp")

Returns registration status only. DataNexus does not provide fitness-for-hire opinions or compliance determinations.

Domain & DNS — domain_ prefix

Sources: IANA RDAP, crt.sh Certificate Transparency, Cloudflare DoH

Tool

What it does

domain_fetch_domain_rdap

Domain registration via IANA RDAP — registrar, expiry, nameservers

domain_fetch_ssl_certificate_chain

SSL certificate history from Certificate Transparency logs

domain_fetch_dns_records

A, AAAA, MX, TXT, NS, CNAME records via Cloudflare DoH

domain_fetch_domain_history

Historical certificate issuance — detect unexpected cert issuance

Example

domain_fetch_domain_rdap("stripe.com")
domain_fetch_dns_records("cloudflare.com", ["A", "MX", "TXT"])

Legal / Patents — legal_ prefix

Sources: EPO OPS (OAuth), USPTO, WIPO PATENTSCOPE

Tool

What it does

legal_fetch_patent_by_number

Full patent details by number — title, abstract, inventors, citations

legal_search_patents_by_keyword

Search EP, US, or WO patents by keyword and date

legal_fetch_patent_citations

Forward and backward citations for prior art research

legal_fetch_inventor_portfolio

Patent portfolio for an inventor with optional assignee filter

Supported jurisdictions: EP (EPO), US (USPTO), WO (WIPO PCT)

Example

legal_fetch_patent_by_number("EP1000000", "EP")
legal_search_patents_by_keyword("neural network image classification", "US", "2020-01-01")

DataNexus does not provide patent valuation, infringement analysis, or legal opinions.

Government Contracting — govcon_ prefix

Sources: USASpending.gov, SAM.gov, EU TED, UK Find-a-Tender

Tool

What it does

govcon_search_contract_awards

Search federal contract awards by keyword, agency, date — US, EU, UK

govcon_fetch_vendor_contract_history

Total award history for a specific vendor

govcon_fetch_open_solicitations

Open bid opportunities matching a keyword

Example

govcon_search_contract_awards("cybersecurity", "Department of Defense", "", "US")
govcon_fetch_vendor_contract_history("Booz Allen Hamilton", "US")

DataNexus returns raw public contract data. It does not provide procurement strategy advice or bid consulting.

Regulatory — regulatory_ prefix

Sources: Regulations.gov, Federal Register API, EU Have Your Say

Tool

What it does

regulatory_search_open_rulemakings

Open rulemakings and comment periods by keyword and agency

regulatory_fetch_docket_details

Full docket details by ID — status, comment count, related documents

regulatory_fetch_federal_register_notices

Recent Federal Register notices for an agency

Example

regulatory_search_open_rulemakings("artificial intelligence", "FTC", "open")
regulatory_fetch_docket_details("FDA-2023-N-0001")

DataNexus returns regulatory data only. It does not provide compliance advice or interpret rules for specific businesses.

Shared tools

Tool

What it does

search_datanexus_tools

Find the right tool by describing your task in plain English

validate_tool_output

Two-layer validation of any tool response — deterministic rules + AI review

report_feedback

Report a data quality issue with a specific tool response

report_mcpize_link

Check subscription status

Cache and freshness

Vertical

Cache TTL

Update frequency

Nonprofit (IRS)

7 days

IRS bulk data updates monthly

Nonprofit (UK)

24 hours

UK GDPR requirement

Security / CVE

1 hour

CVEs published continuously

Compliance (NPI, FINRA)

24 hours

Registry updates daily

Domain & DNS

4 hours

DNS TTL-aware

Patents

24 hours

Patent offices update weekly

GovCon

4 hours

USASpending updates daily

Regulatory

4 hours

Regulations.gov rate-limit aware

Every response includes data_as_of, cache_hit, and ingest_healthy fields so agents can assess data freshness.

Response format

Every tool response includes:

{
  "tool_id": "T04",
  "markdown_output": "## Wikimedia Foundation...",
  "data": { ... },
  "query_hash": "3d1697d3...",
  "cache_hit": true,
  "data_as_of": "2026-05-09T00:00:00Z",
  "ingest_healthy": true,
  "sha256_hash": "a3f8c2...",
  "disclaimer": "Data sourced from IRS EO BMF..."
}

markdown_output is pre-formatted for direct LLM consumption. data contains structured fields for agent parsing. query_hash links responses to feedback reports.

Report a data quality issue

If a tool returns incorrect, stale, or incomplete data:

report_feedback(
  tool_id="T10",
  query_hash="3d1697d3abcf404c...",
  signal="incorrect_data",
  comment="GHSA-xxxx has UNKNOWN severity despite CVSS vector present"
)

Valid signals: incorrect_data, missing_field, stale_data, not_useful, wrong_entity, data_quality

Feedback is reviewed by an automated Haiku validation pipeline and escalated to human review when confirmed at high confidence.

Data sources and licences

Vertical

Source

Licence

US Nonprofits

IRS EO BMF + IRS TEOS

Public domain

UK Charities

Charity Commission for England and Wales

Open Government Licence v3.0

CVE / Vulnerabilities

Google OSV.dev + NIST NVD

CC0 / public domain

NPI Registry

NPPES (CMS)

Public domain

FINRA BrokerCheck

FINRA

Public access

SAM.gov Exclusions

SAM.gov

Public domain

Domain / DNS

IANA RDAP + crt.sh + Cloudflare DoH

Public access

Patents

EPO OPS + USPTO + WIPO

Public access

Government Contracts

USASpending.gov + SAM.gov

Public domain

Regulatory

Regulations.gov + Federal Register

Public domain

DataNexus acts as data controller for UK charity data processed under OGL v3.0. Individuals whose data appears in charity records may contact dataprotection@datanexusmcp.com to exercise rights under UK GDPR Article 17.

Links

Install Server
A
license - permissive license
A
quality
B
maintenance

How are these scores calculated?

Maintenance

–Maintainers
–Response time
4dRelease cycle
2Releases (12mo)

Resources

Tools

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