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The capability layer

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The differentiator

Coverage & sourcesThe catalogFreshnessMethodologyCare CompareFacility qualityCompare grounded answersBrowse all datasets →
Research

The dev on-ramp

DocsAPI referenceMCP — connect your agentOne-paste installFHIR sandboxLive API surfaceQuickstartStatusChangelogSDKs & integrations
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Solutions

Exclusion & monitoring (self-serve)Exclusion & sanctions screeningCredentialing & provider-data enrichmentAudit evidence & defensible programsProvider data for AI / RAGM&A & network diligenceCompliance & riskJournalists & newsroomsDevelopers & AI teamsHealthcareSanctionsFederal contracting

Platform

APIMCP serverFHIR R4 APIBulk exportAttestation & audit packReconciliationGrounded answersEntity graphSnapshots

Data

Coverage & sourcesFreshnessMethodologyCare CompareCompare grounded answersBrowse all datasets →
Research

Developers

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uk-companies-house

UK company lookup by company number

Fonteum renders UK company-register pages from Companies House rows keyed by company number, with status, incorporation date, company type, registered-office address, SIC codes, and source dates.

How do I look up a UK company by its company number?

Use the Companies House company number as the route key. Fonteum reads UK company rows from the Companies House Free Company Data Product and displays company name, number, status, incorporation date, company type, registered-office address, and SIC codes with OGL attribution.

Source: UK Companies House Company Register · License: OGL-UK-3.0.

URL pattern

Company pages live at /global/uk/company/<company-number>. They render only when a current public-register row is loaded.

Back to global company registers

The substrate, by the numbers

44federal source familiesDistinct CMS, OIG, HRSA, FDA and peer datasets
35dataset pagesCitable, downloadable /data catalog pages
70reproducible studiesEach shipping the SQL behind its figures

Built on the authoritative federal record

The primary sources, named on every page.

These are the federal agencies whose public datasets Fonteum ingests and attributes — the issuing authorities, not customers or partners. Every figure on the site links back to one of them.

  • CMS
  • HHS-OIG
  • HRSA
  • FDA
  • NLM
  • NUCC
  • Census
  • BLS
  • BEA

See the full source registry, with license and refresh cadence for each →

Reproducible by design

Every figure traces to its federal source.

14-tuple provenance

Every rendered fact ties to a source URL, dataset ID, snapshot date, row key, and SHA-256 — the full chain-of-custody record.

Reproducible SQL

Each study ships the exact query behind its figures, run against the cited federal snapshot. Re-run it yourself.

Daily count checks

Published counts are checked against the upstream federal datasets on a daily cadence, with drift logged.

Named medical review

Reviewed by Jennifer Montecillo, MD, medical reviewer. Non-practicing medical reviewer.

Read the full provenance and attestation methodology →

Two doors

Use the free API and open data

Query providers, facilities, sanctions, and quality scores — each field carrying its federal source. Self-serve, no call to start.

Explore the API →Browse the data catalog →

Talk to us

Managed pilots, enterprise terms, and audit-ready, signed attestation packages for compliance, risk, and research teams.

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Reviewed by Jennifer Montecillo, MD, medical reviewer. Non-practicing medical reviewer.

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The U.S. public-records graph AI can cite — every fact carries its source.

Every fact Fonteum serves carries a signed, re-checkable trust mark — source, as-of date, and an Ed25519 signature travel with the data. Re-check any fact at fonteum.com/verify · the trust-mark standard (W3C Verifiable Credentials 2.0, C2PA-aligned).
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