Data API
Your data API key
Your key, plan
This browser remembers your key.
Save this key and keep it safe. Anyone who has it can use your subscription. If you lose it, open this page on any device, enter the email you paid with, and we will email you a link to a newly made key.
Three ways to use it
In a terminal, send the key as a bearer token:
In Claude Code, one command adds the YFarmX tools with your key, paid tools included:
In your own code, any HTTP client works: set the header Authorization to Bearer followed by your key. Every endpoint, filter and answer is on the data API page, and the key works for as long as the subscription is paid.
Open your key on another device
This link opens your key on any device. Treat it like the key itself and keep it with your passwords.
Manage your subscription
Change your card, switch between Developer and Pro, download invoices or cancel in Stripe's billing portal. Stripe emails you a sign-in link each time you open it.
Your key appears on this page as soon as Stripe confirms your payment, usually within seconds, and this browser remembers it, so coming back here opens it again.
Already subscribed?
The browser you used at checkout opens your key again here. Save the private reopen link shown alongside your key to use it on another device.
Lost your key?
Enter the email you paid with and we will email you a link to a newly made key. The link works for 30 minutes, and your old key stops working when you open it.
Manage your subscription
Change your card, switch between Developer and Pro, download invoices or cancel in Stripe's billing portal. Stripe emails you a sign-in link each time you open it.
New here?
Developer, £29 a month: every measured model as one keyed feed, by API or MCP. Pro, £199 a month: adds the dated change history, the fingerprint clusters and the cost estimate feed.