Customers API
Find out who buys from a company. Each customer and partner comes with the public page that names it.
200 free credits with a work e-mail. No credit card required.
What you get
- Customer and partner names with their domains
- The public page that names each one, and a quote when there is one
- A verified status for each customer domain
- How many public sources name the same customer
- A short card for each customer: industry, size and country
- Cursors to page through long lists
One call
curl -G https://api.innerfetch.com/api/v1/company/customers \
-d domain=stripe.com -d include=customers,partners \
-H "X-API-Key: $INNERFETCH_API_KEY"customers[0].name: "Carousell"
customers[0].domain: "carousell.sg"
customers[0].evidence.url: "https://stripe.com/newsroom/stories/carousell-and-stripe"
customers[0].domain_status: "verified"
customers[0].source_count: 19
customers[1].name: "Edf"
customers[1].evidence.url: "https://stripe.com/customers/edf"
partners[0].name: "Linear"
partners[0].evidence.quote: "Linear partners with Stripe to handle billing and payments."What it costs
- Customer or partner row: 2 credits a row, +1 a call
- Calls that fail on our side and queued calls are free
What teams use it for
Lead with names they trust
Open an e-mail with a customer the prospect already knows.
Find look-alike accounts
Take a competitor's customers and look for the same profile in your market.
Check a vendor
See who already buys from a supplier before you sign.
Customers API, answered
What does a customer list cost?
Credits: 1 + 2 per row returned over all lists (include=customers,partners), at most 401 a page per list. Free when: 202 queued.
Where do the customers come from?
From public pages that name the relationship. Each row has the link, so you can open the page and see it for yourself.
What happens with a company you have not seen before?
The call answers 202 and costs nothing. We fetch the company in the background; call again a little later, or pass a callback URL and we tell you when the data is ready.
Do you return partners too?
Yes. Add include=customers,partners to get both lists in one call.
Do I pay when a call fails?
No. A call that fails on our side is free, and so is a queued call. Every answer shows its cost in the X-Credits-Cost header.
Guides that use it
Find your competitors' customers
List the companies that buy from your competitors, each with the public page that shows it.
Company data for AI agents
Give your agent company facts with sources, through the MCP server or pay per call.
How it compares
Innerfetch API vs ZoomInfo
Self-serve credits at $0.38 each at list price. Strong on contacts and intent.
Innerfetch API vs Apollo
A sales platform with an API. Per-seat plans; credit price not published.
Innerfetch API vs Crunchbase
Deep funding data. The API is sold only through sales.
Try it on a company you know
Start with 200 free credits. Sign up with a work e-mail.