One endpoint, one price.

A plain JSON API over HTTPS for verified work email addresses. No SDK, no seat licence, no sales call. You pay for answers — a lookup that finds nothing is free.

Purchase credits llms.txt

Buying seats for a sales team instead? That's the other plan →

Nothing to integrate. Your AI already knows how.

Point any assistant at one URL and it knows the whole service — every endpoint, every parameter, every price.

llms.txt is generated from the live service, so what your assistant reads is what you are charged. No SDK to install, no client library, no documentation to work through, no ticket for an engineer. Claude, ChatGPT, Cursor, Copilot — anything that can read a page and make a request.

The whole setup

Read https://csuitefinder.com/llms.txt and use the CSuiteFinder API and store my token `csf_live_...` to be used. Then run /demo

That is the integration, start to finish. Walk through it →

No SDK, in any language Plain JSON over HTTPS, one bearer token. There is no client library to pin, upgrade, or wait on.

Prices your agent can read Every endpoint carries its cost in the same file, so an agent can budget a run before it spends anything.

One line in your project rules Drop the URL into CLAUDE.md, AGENTS.md or Cursor rules and it stays available without being told again.

Worth telling your agent: you can start from a name or from a domain. /email/find resolves someone you can already name; /email/company/people is the one that builds the list. Agents that only learn the first waste turns hunting for a search endpoint they have already been given.

Your assistant

Read https://csuitefinder.com/llms.txt and use the CSuiteFinder API and store my token csf_live_... to be used. Then run /demo

Read https://csuitefinder.com/llms.txt and use the CSuiteFinder API and store my token CSF_KEY_HERE to be used. Then run /demo

Read llms.txt — 18 endpoints, prices included. Token stored. Running /demo.

GET /email/company/people domain=stripe.com · executive · limit 20 included

POST /email/deliverable × 20 included

18 deliverable 2 undeliverable out of this month's credit

The two that would have bounced were caught before you sent to them.

Prospects.csv 20 rows · name, title, email, deliverable

Ready

Ask for the next twenty

C5 fx ac•••••@paypal.com

	A	B	C	D
1	Name	Title	Email	Deliverable
2	Michael Miebach · Mastercard	CEO	mi•••••_mi•••••@mastercard.com	✓ Deliverable
3	Stephen Squeri · American Express	CEO	st•••••.sq••••@americanexpress.com	✗ Undeliverable
4	Sasan Goodarzi · Intuit	CEO	sa•••_go••••••@intuit.com	✓ Deliverable
5	Alex Chriss · PayPal	CEO	ac•••••@paypal.com	✓ Deliverable
6	Chris Suh · Visa	EVP, CFO	cs••@visa.com	✓ Deliverable
7	Sachin Mehra · Mastercard	CFO	sa••••_me•••@mastercard.com	✓ Deliverable
8	Michael Shepherd · Discover	CEO	mi•••••••••••••@discover.com	✗ Undeliverable
9	Sandeep Aujla · Intuit	CFO	sa•••••_au•••@intuit.com	✓ Deliverable
10	Richard Fairbank · Capital One	CEO	ri•••••.fa••••••@capitalone.com	✓ Deliverable
11	Jamie Miller · PayPal	CFO	jm•••••@paypal.com	✓ Deliverable

Prospects.csv Sheet2 +

$0.01 / email

Real lookups, run on 9 September 2026: a name and a company domain in, a work address and a job title out — and no two of these companies build their addresses the same way. Contact details are masked here because these are real people. Deliverable is the live mailbox check: the two marked otherwise are addresses you would have bounced, found before you sent.

Example

Send your key as Authorization: Bearer <key> on every request. Your account page issues one, and shows your balance and billing.

curl -H "Authorization: Bearer $CSF_KEY" \
  "https://csuitefinder.com/api/email/find?full_name=Jensen%20Huang&domain=nvidia.com"

{
  "email": "jhuang@nvidia.com",
  "full_name": "Jensen Huang",
  "domain": "nvidia.com",
  "found": true,
  "confidence": 0.937638
}

Endpoints

Method	Path	Parameters	What it does
POST	`/api/email/find`	`full_name`, `domain`, `email` (optional)	A name and a company become that person's work email. The optional `email` is a colleague's address at the same company.
POST	`/api/email/company/people`	`domain`, `department`, `limit`	Who works at a company, with a work email for each. `department=executive` for the C-suite. $0.01 per person.
POST	`/api/email/deliverable`	`email`	Is this mailbox real? Returns deliverable, undeliverable, accept_all or unknown, with the MX and SMTP signals behind it.
POST	`/api/email/enrich`	`email`	The person behind an address — name, job title, seniority, department, employer, location.
POST	`/api/email/name`	`email`	Just the identity: name, title, employer. The narrow form of enrich.
POST	`/api/email/pattern`	`email`	How a company formats its addresses, with every alternative and how common each is.
POST	`/api/email/linkedin`	`linkedin_url`	A work email from a LinkedIn profile URL. $0.015 — dearer than `/email/find`, because a profile carries no domain to reuse.
POST	`/api/phone/enrich`	`phone`	The person behind a number: name, title, employer, address.
POST	`/api/phone/name`	`phone`	Whose number is this, and their work email — from numbers we already hold.
POST	`/api/company/search`	`industry`, `technology`, `size`, `country`, `q`, `limit`	Companies matching a description — an account list for lead generation. Every row is a domain the rest of the API takes as input. $0.01 per company.
POST	`/api/company/find`	`email` or `domain`	Which company an address belongs to — name, domain, website, LinkedIn.
POST	`/api/company/info`	`email` or `domain`	The full company profile: industry, headcount, founding year, location.
POST	`/api/people/search`	`title`, `company_domain`, `country`, `q`, `limit`	Who holds a job, across companies — not just at one you already know. Addresses come back unverified; check them before sending. $0.01 per person.

Every endpoint also accepts GET with a query string. The optional email on /email/find is a colleague's address at the same company: give us one address there and we can resolve the rest.

Managing your account

Path	What it does
`GET /api/billing/balance`	Your balance and the full price list
`GET /api/billing/usage?days=30`	Calls, cache hits and spend per endpoint
`GET /api/keys`	Your API keys — mint a spare, revoke an old one
`POST /api/billing/topup`	Buy credit — returns a Stripe checkout link
`GET /api/health`	Service status

Pricing

You pay for what we find: $0.01 an email address, whether you resolve one person from a name or discover a roomful from a domain. Deliverability checks, identity lookups, company data and email formats are all included with any balance. Every endpoint's own price is listed below.

$0.01 per work email found

$0 per lookup that finds nothing

Credit you buy never expires and a dollar buys a dollar of it. Purchases start at $1,000.

Per-endpoint cost

Endpoint	Price
email
`email.find`	$0.01
`email.company.people`	$0.01
`email.deliverable`	included
`email.enrich`	included
`email.name`	included
`email.pattern`	included
`email.linkedin`	$0.015
phone
`phone.enrich`	included
`phone.name`	included
company
`company.search`	$0.01
`company.find`	included
`company.info`	included
name
`name.who`	included
people
`people.search`	$0.01

Purchase credits and start building