treg.to / Catalog / The Companies API
4 tools · from $0.0019/success · $0.000 markup

The Companies API MCP for AI agents

Firmographics and technology-stack detection across ~50M companies. 4 tools for your agent through one treg.to key, priced per call from $0.0019/success, with no The Companies API signup.
Start freeSee all 4 toolsAPI docs ↗
$1.00 of free credit on every new team · no provider signup · no card
works in
ChatGPTClaudeClaude CodeCodexCursorGrokGemini CLI
What your agent can now do

The Companies API, one prompt away

AGENT
ChatGPTClaudeClaude CodeCodexCursorGrokGemini CLI
enrich a company from its domain or name✓
search companies by industry, size or tech✓
find a company's work-email format✓
→
▚ treg
$ treg call thecompaniesapi.companies.enrich
✓ 200 · $0.0019/success
$ treg call thecompaniesapi.companies.search
✓ 200 · $0.0019/result
$ treg call thecompaniesapi.companies.email_pattern
✓ 200 · $0.0019/success
$ _
→
The Companies APINO SIGNUP
Firmographics and technology-stack detection across ~50M companies.
⚒ 4 TOOLS · metered per call

Enrichment · https://api.thecompaniesapi.com/v2

Set up

Set up The Companies API in Claude Code, Codex or any agent

1Give this to your agent
in your agent's chat
set up treg — https://treg.to/llms.txt
2Or add the MCP server yourself
claude code
claude mcp add --transport http treg https://treg.to/mcp

ChatGPT

Settings → Connectors → add https://treg.to/mcp as a custom connector.

Grok bot

Add https://treg.to/mcp as a remote MCP connector in its tool settings.

Claude Desktop

Settings → Connectors → Add custom connector → https://treg.to/mcp.

Cursor, Codex, any MCP client

Point it at https://treg.to/mcp (HTTP transport).

CLI

curl -fsSL https://treg.to/install.sh | sh

Plain HTTP

LangChain, CrewAI or any code: /call/<tool-id> with a Bearer token. No SDK.

Try it

What's the best way to ask?

the prompt
Using treg, enrich a company from its domain or name. Show me the price first.

Run one directly

a call
curl -H "Authorization: Bearer $TREG_TOKEN" \
  "https://treg.to/call/thecompaniesapi.companies.enrich"
Why treg.to

Why call The Companies API through treg.to

No The Companies API signup

Eligible tools run on treg.to's key, metered per call from a prepaid balance.

Price before the call

The provider's own rate, $0.000 markup. How billing works.

No subscription, no seats

Charged per call. $1.00 free per new team, no card to start.

Your own The Companies API key is free

Register it and those calls are never metered. Your key always wins.

Switch by changing a word

Another provider is a different word in the prompt, not a new integration.

One key, the whole catalog

The same token calls Akta by Wokelo, Apollo.io, Aviato and ~2,600 other tools.

The shelf

All 4 The Companies API tools

Company data · 4 tools
  • Enrich a company by domain — 80+ datapoints · $0.0019/success
    Enrich a company from its domain — 80+ datapoints: industry, size, revenue, socials thecompaniesapi.companies.enrich
  • Search companies by industry, size, location or tech · $0.0019/result
    Search companies by industry, size, location, technology or any other attribute filter thecompaniesapi.companies.search
  • Enrich the company behind an email address · $0.0019/success
    Identify and enrich the company behind an email address thecompaniesapi.companies.enrich_by_email
  • A company's email address patterns by domain · $0.0019/success
    Find which email-address formats a company uses, and how common each one is thecompaniesapi.companies.email_pattern

Reliability badges come from live traffic through treg.to, not a controlled benchmark.

Related

Same jobs, other providers

These providers answer some of the same capabilities as The Companies API. The platform pages show them on one row with rate and coverage; choosing is yours, treg.to does not route between providers automatically.

also on the catalog
Akta by WokeloApollo.ioAviatoBrand.devBright DataCompanyEnrichCoresignalCrunchbaseCrustdataDiffbotFiber AIFindymail
Questions

Before you start

Do I need a The Companies API account?

No. Eligible tools run on treg.to's key and the call is metered from your team's prepaid balance, priced up front. If your team registers its own The Companies API key, that key always wins and those calls are never metered.

What does a call cost?

Each tool on this page shows its rate; the cheapest is $0.0019/success. The rate is the provider's own and treg.to adds no markup; it is billed per call from a prepaid balance. It is not The Companies API's subscription pricing, which is on their own site. New teams start with $1.00 of free credit.

How do I add The Companies API to Claude Code?

Run: claude mcp add --transport http treg https://treg.to/mcp — one MCP server carries The Companies API and the rest of the catalog.

Which frameworks does it work with?

Anything that speaks MCP (Claude Code, Claude Desktop, ChatGPT, Codex, Cursor, Grok) and anything that can make an HTTP request (LangChain, CrewAI, LlamaIndex, plain code).

Is this the official The Companies API MCP server?

No. treg.to serves The Companies API's real API through its own metered proxy: the request is the provider's own, the credential is injected server-side, and the answer is relayed verbatim. The official The Companies API channels are linked above.