Ohio - Topograph

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This guide contains public integration notes for Ohio. Use it for identifier formats, search behavior, and country-specific caveats. The live source of truth for coverage, pricing, data sources, documents, legal forms, roles, and status values is the pricing page.

Ohio coverage, pricing, and sources

Open the current catalog for supported datapoints, documents, sources, identifiers, and availability.

This jurisdiction may be in preview or limited availability. Check the live pricing page or contact support before relying on it in production.

Country details below are preserved as integration notes. If a table or example conflicts with the live pricing page, use the pricing page as the source of truth and contact support.

Data Sources
Company Identifiers
Search Capabilities
Quirks & Gotchas
Mappings
- Legal Forms
Data Availability

API access: US-OH is not yet part of the public countryCode enum. Contact us to enable it on your workspace. Requests sent with countryCode: "US-OH" will otherwise return 400 until the enum is expanded.

Data Sources

Ohio uses a single integration against the Ohio Secretary of State, Business Services portal (businesssearch.ohiosos.gov). Two channels are wired:

Ohio SOS Monthly Business Reports (fast, primary). Free official TXT reports generated on the second Saturday of each month. They cover new filings, subsequent/amendment filings, and canceled or dissolved LLCs. They do not cover the full live register population. Used for onboarding checks, company search, and the primary verification baseline.
Ohio SOS Business Search (slow, authoritative). A live read from the public business search portal. Adds fields not present in the monthly reports: current status, full principal address, statutory agent details, and prior names. This channel is available through the verification mode.

Mode-based routing. Onboarding requests (mode: "onboarding") are served from the monthly Business Reports. Verification requests (mode: "verification") layer the live SOS business search on top, returning the most current status and statutory-agent data available on the portal.

Report coverage. The Ohio SOS monthly Business Reports cover filing events, not the full register population. Entities that have not had a filing event in the current or recent report cycles may not appear in search results. Use verification mode with a known Ohio ID for the most current data on a specific entity.

Company Identifiers

Query Identifiers

Identifier Type	Format	Example	Notes
Ohio Charter / Entity Number	Numeric string; exact width varies by entity type. Leading zeros are preserved when present.	`1234567`	Primary identifier assigned by the Ohio Secretary of State. Corresponds to the charter number on the public business search portal and in the monthly Business Reports.

Identifiers in API Response

Identifier	Format	Example	Found In
`ohioId`	Numeric string; width varies. Leading zeros preserved when present.	`1234567`	All entities

Search Capabilities

Search Type	Pattern	Example	Match Type	Expected Results
By Name	2-100 chars	`"Nationwide"`	Prefix match (case-insensitive)	Multiple results
By Ohio Charter / Entity Number	Numeric	`1234567`	Exact (`matchType: id`)	Single result or none

Prefix search. Name search anchors on the beginning of the legal name (case-insensitive). Use fuller query strings to narrow the result set, which is capped at 50 matches.

Search coverage. Search results are drawn from the monthly Business Reports dataset. Entities absent from recent report cycles may not appear in search results even if they are registered with the Ohio SOS. Searching by Ohio ID resolves directly against the dataset and is the most reliable lookup when you already have the identifier.

Quirks & Gotchas

Quirk	Details
Reports cover filing events, not the full population	The monthly Business Reports are generated from filing activity rather than a full-register snapshot. Entities without a recent filing event may be missing from search results. Use the `ohioId` directly for lookups when you already have the identifier.
Authoritative mode adds fields not in the reports	Live status, the full principal address block, the statutory agent name and address, and prior names are only available through the live SOS business search (verification mode). Onboarding mode returns only the fields present in the monthly reports.
No officer or director roster	Ohio SOS does not publish a member, director, or officer list through either the monthly reports or the public business search portal. The statutory/registered agent returned in verification mode is not an officer in the legal sense.
No shareholders or UBO register	Shareholder lists and beneficial ownership data are not published by the Ohio SOS.
No activity codes	Industry classification codes (NAICS, NACE, ISIC) were not found in the Ohio SOS public sources.
No tax IDs	Federal EIN and state tax identifiers are not disclosed by the Ohio SOS public business register.
Trade Register Extract included at no extra charge	The printable Trade Register Extract (a PDF rendering of the live SOS detail page) ships with the company-data block. It includes the entity number, legal name, type, status, filing dates, principal location, statutory agent, prior names, and filing history.

Mappings

Legal Forms

Legal form is sourced from the entity type field of the Ohio Secretary of State monthly Business Reports. The vocabulary is a closed set of 10 values.

All 10 Ohio entity types

Ohio SOS Entity Type	Standardized
Domestic For-Profit Corporation	Corporation
Foreign For-Profit Corporation	Corporation
Domestic Nonprofit Corporation	NonprofitOrganization
Foreign Nonprofit Corporation	NonprofitOrganization
Domestic Professional Corporation	Corporation
Foreign Professional Corporation	Corporation
Domestic Limited Liability Company	LimitedLiabilityCompany
Foreign Limited Liability Company	LimitedLiabilityCompany
Domestic Limited Partnership	Partnership
Foreign Limited Partnership	Partnership

The full legal-form list with provenance details is on the Ohio pricing page.

Data Availability

Data Point	Available	Notes
Company name	Yes	Current legal name
Company status	Verification only	Live status is returned only in verification mode from the SOS business search portal. Onboarding mode does not include a status field.
Registration date	Yes	Filing date from the monthly Business Reports
Legal address	Partial	Onboarding mode includes the location fields present in the reports. Verification mode adds the full principal address block from the live portal.
Legal form	Yes	Closed 10-value vocabulary from the Ohio SOS
Statutory agent	Verification only	Agent name and address are available in verification mode from the live portal.
Prior names	Verification only	Prior entity names are returned in verification mode when present on the live portal.
Activity codes	No	Not collected by the Ohio SOS
Officers / directors	No	Not published by the Ohio SOS
Shareholders	No	Not published
UBOs	No	Not published (federal FinCEN is a separate system)
Tax IDs	No	Not disclosed by the Ohio SOS public register
Trade Register Extract	Yes	Included at no extra charge with the company-data block. PDF rendering of the live SOS detail page covering entity summary, statutory agent, prior names, and filings.
Filing document images	No (roadmap)	Individual filing PDFs available at the SOS portal are not yet offered through Topograph.

For the full datapoint catalog, check the Ohio pricing page.

Example API Responses

Search by Name

curl -X POST "https://api.topograph.co/v2/search?country=US-OH&query=Nationwide" \
  -H "x-api-key: YOUR_API_KEY"

[
  {
    "id": "1234567",
    "legalName": "NATIONWIDE MUTUAL INSURANCE COMPANY",
    "countryCode": "US-OH",
    "matchReason": {
      "matchType": "default"
    },
    "address": {
      "region": "OH",
      "countryCode": "US"
    }
  }
]

Search by Ohio ID

curl -X POST "https://api.topograph.co/v2/search?country=US-OH&query=1234567" \
  -H "x-api-key: YOUR_API_KEY"

[
  {
    "id": "1234567",
    "legalName": "NATIONWIDE MUTUAL INSURANCE COMPANY",
    "countryCode": "US-OH",
    "matchReason": {
      "matchType": "id"
    }
  }
]

Company Profile (Onboarding)

curl -X POST "https://api.topograph.co/v2/company" \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"countryCode": "US-OH", "id": "1234567", "dataPoints": ["company"], "mode": "onboarding"}'

{
  "company": {
    "id": "1234567",
    "countryCode": "US-OH",
    "identifiers": { "ohioId": "1234567" },
    "legalName": "ACME MANUFACTURING LLC",
    "registrationDate": "2010-03-15",
    "legalForm": {
      "localName": "Domestic Limited Liability Company",
      "standardized": "LimitedLiabilityCompany"
    },
    "legalAddress": {
      "city": "Columbus",
      "region": "OH",
      "countryCode": "US"
    }
  }
}

​Start here

Ohio coverage, pricing, and sources

​Table of Contents

​Data Sources

​Company Identifiers

​Query Identifiers

​Identifiers in API Response

​Search Capabilities

​Quirks & Gotchas

​Mappings

​Legal Forms

​Data Availability

​Example API Responses

​Search by Name

​Search by Ohio ID

​Company Profile (Onboarding)

Start here

Table of Contents

Data Sources

Company Identifiers

Query Identifiers

Identifiers in API Response

Search Capabilities

Quirks & Gotchas

Mappings

Legal Forms

Data Availability

Example API Responses

Search by Name

Search by Ohio ID

Company Profile (Onboarding)