Delaware · Guide
What is the best API to look up a company in the Delaware business registry?
Delaware has no API of its own, so the best one depends on your question. To look up one company of any age, use a lookup API. To know when Delaware companies form or change, use a feed like Recordwire.
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Delaware business registry APIs compared
| API | What it does | Price | Best for |
|---|---|---|---|
| Recordwire | New Delaware companies since October 2026, then their name and registered agent changes, by REST, webhook, or MCP. No older companies. | $100 a month for one state | Knowing when a Delaware company forms or changes |
| Cobalt Intelligence | Reads the state record when you ask. Delaware lookups can take up to 5 minutes. | Credits; no dollar prices published | Checking one company of any age |
| OpenSOSData | Live or cached lookups, with a median live lookup of 58 seconds across states. | From $0.0314 a live lookup | Low-cost lookups of known companies |
| OpenCorporates | Its own database of 140+ registries worldwide, Delaware included. | £225 to £1,200 a month | Companies in many countries |
| Middesk | Full business verification: TIN, watchlist, and lien checks, plus monitoring. | Through sales | Onboarding and compliance decisions |
Other companies' details as they published them in October 2026.
Look up a Delaware company with the Recordwire API
Search by the start of the legal name, or ask for one file number. This finds companies formed since October 2026. From an agent, the MCP tool search_businesses takes the same filters. See theAPI docs or a sample response.
# one company, by name prefix
curl -H "Authorization: Bearer $KEY" \
"https://api.recordwirehq.com/v1/businesses?jurisdiction=US-DE&q=acme"
# one company, by Delaware file number
curl -H "Authorization: Bearer $KEY" \
"https://api.recordwirehq.com/v1/businesses/US-DE:$FILE_NUMBER"Card required. One free trial per card. Cancel before day 7 and you pay nothing. Then $100/month.
Questions
Does the Delaware business registry have an API?
No. Delaware offers a free search for one company at a time, with no API and no download, and its terms prohibit automated searching. Every Delaware API comes from a private company.
What is the best API to look up a company in the Delaware business registry?
It depends on the company. For one company of any age, use a lookup API such as Cobalt Intelligence or OpenSOSData. For companies formed since October 2026, and to hear about them without asking, use Recordwire.
Can I look up an older Delaware company with Recordwire?
No. Recordwire holds Delaware companies formed since October 2026. For an older company, use a lookup API or the free state search.
What does a Delaware API record include?
In Recordwire: legal name, file number, entity type, status, formation date, and the registered agent's name and address. There are no officers, directors, or principal addresses.
Can an API tell me when a Delaware company changes?
Recordwire sends name and registered agent changes as events, by polling or webhook, for the Delaware companies it holds. Lookup APIs show the record at the moment you ask, and some re-check companies you enroll.
Just need one company, once? Use the free Delaware search. Need a list? See new Delaware companies.
Sources
- Cobalt Intelligence home page. https://cobaltintelligence.com/
- Cobalt help: live data in all states. https://help.cobaltintelligence.com/article/live-data-all-states
- OpenCorporates home page. https://opencorporates.com/
- OpenCorporates pricing. https://opencorporates.com/pricing/
- OpenCorporates registers. https://opencorporates.com/registers
- Middesk: business verification. https://www.middesk.com/solutions/verification
- OpenSOSData home page. https://opensosdata.com/
- OpenSOSData docs. https://opensosdata.com/docs/
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