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The Companies API for AI agents

The Companies API enriches and searches company data, including technologies used, locations, and firmographics, for teams building lead lists or market research. Connect it once through Arc0, and your agent, or Claude, ChatGPT and Cursor, can use it through one MCP endpoint, limited to what each user approved.

Connect The Companies APISee the 10 actions ↓
AnalyticsAPI keyMCP + RESTthecompaniesapi.com
AUDIT LOG · THE COMPANIES APIPOLICY: acme-support
09:41:07 · claude · u_8f2read
the_companies_api.list_lists
List Lists✓ allowed · 212ms
09:41:08 · claude · u_8f2read
the_companies_api.get_company
Get Company✓ allowed · 164ms
09:41:09 · claude · u_8f2write
the_companies_api.create_list
Create List✓ approved · approved by user
09:41:12 · claude · u_8f2destructive
the_companies_api.delete_list
Delete List✕ blocked · policy: deny
EVERY THE COMPANIES API CALL, ON THE RECORD
01 · USE CASES

What agents do in The Companies API.

01

Search companies by criteria

Find companies matching filters like industry, size, or technology stack.

02

Get details on a specific company

Pull a company's profile as a read-only lookup before adding it to a list.

03

Confirm before deleting a saved list

Check with the user before deleting a company list, since it removes the saved research.

02 · ACTIONS

10 The Companies API actions, graded by risk.

Every The Companies API action is tagged read, write or destructive, so one policy covers the whole app and new actions inherit the right default.

read

6

Look things up. Allowed by default.

  • the_companies_api.list_lists
    List Lists
  • the_companies_api.get_company
    Get Company
  • the_companies_api.search_taxonomy
    Search Taxonomy
  • the_companies_api.search_companies
    Search Companies
  • the_companies_api.get_account_context
    Get Account Context
  • the_companies_api.list_companies_in_list
    List Companies In List

write

3

Create and change things. Allow, or ask the user first.

  • the_companies_api.create_list
    Create List
  • the_companies_api.rename_list
    Rename List
  • the_companies_api.enrich_job_title
    Enrich Job Title

destructive

1

Delete, cancel or archive. Ask first, or deny outright.

  • the_companies_api.delete_list
    Delete List
03 · HOW IT WORKS

The Companies API in three steps.

  1. 01Your users connect The Companies APIThey add their The Companies API api key on Arc0 Connect, under your brand. It goes straight into the vault.
  2. 02You set the rulesReads run, writes like “create List” can wait for the user, and “delete List” can be denied outright.
  3. 03Any agent can actYour agent calls The Companies API through the Arc0 SDK or MCP, and so can Claude, ChatGPT and Cursor. Every call lands on the audit log.
POLICY.TS
await arc0.policies.set('the_companies_api', {
  read: 'allow',
  write: 'ask',        // create_list
  destructive: 'deny',  // delete_list
})

# Claude Code: the same connection, one URL
$ claude mcp add --transport http arc0 \
    https://mcp.arc0.ai/u/u_8f2
04 · AUTH AND DATA

How The Companies API connects.

Users add their The Companies API api key on Arc0 Connect. It is encrypted in the vault, never shown to the model, and each user can rotate or revoke it at any time.

The same The Companies API connection serves your agent over MCP and your own backend over REST and the proxy, so a user connects once. How Arc0 handles credentials →

AUTH
API key
CREDENTIALS
Per-tenant encrypted vault
MODEL SEES
Results only, never credentials
AUDIT LOG
Every call, on every plan
05 · WORKS WITH

Use The Companies API from any agent.

Claude
ChatGPT
Cursor
Codex
VS Code
OpenAI Agents SDK
Claude Agent SDK
Vercel AI SDK
Mastra
LangGraph
06 · RELATED

More analytics apps.

Gong58 actionsSerpApi59 actionsPeople Data Labs27 actionsPostHog507 actions21risk8 actionsAkta19 actionsAlpha Vantage56 actionsAmplitude54 actions
ALL ANALYTICS APPS →
07 · FAQ

The Companies API and Arc0, answered.

Q01

Can I use The Companies API with Claude, ChatGPT or Cursor?

Yes. Connect The Companies API to Arc0 once, then add your Arc0 MCP URL to Claude, ChatGPT, Cursor, Claude Code or any other remote-MCP client. Each assistant only gets the The Companies API actions you allow.

Q02

How do users connect The Companies API?

Users add their The Companies API api key on Arc0 Connect. It is encrypted in the vault, never shown to the model, and each user can rotate or revoke it at any time.

Q03

Which The Companies API actions can my agent take?

10 in total: 6 read, 3 write and 1 destructive, such as “create List”. Your policies decide which of them each agent may call.

Q04

Can I stop my agent from deleting things in The Companies API?

Yes. Actions like “delete List” are graded destructive. Set destructive actions to deny, or to ask so the user approves each one, and blocked calls still show up on the audit log.

Q05

Can my own backend call The Companies API too?

Yes. The same The Companies API connection is available over REST and through the Arc0 proxy, so your product and your agent share one connection per user.

Get started

Plug The Companies API into your agent.

Your users connect The Companies API once, under your brand. Your agent gets 10 actions behind your policies, with every call on the record.

Connect The Companies APIBrowse all apps →

Free to build · MCP + REST · Audit log on every plan