API Terms
Last updated: October 30, 2026
These terms apply to use of the C4C API with a key we issue, in addition to our Terms of Use.
Your key
Keep your key confidential. You are responsible for all use of it. Tell us right away if it may have been exposed, and we will revoke it and issue a new one.
Plans and permitted use
- Trial (free, 500 calls a day): evaluating the API.
- Internal ($399 a month): using the API in your organization’s own systems and AI assistants, for your own business, including work product your staff make from the results.
- Client ($1 to $50 per client a month, depending on volume and how much of the library you use): using the API to provide services or products to your clients, including AI assistants your customers use and work product you deliver to them.
On any plan you may use the API to look up, quote and cite regulations. Production use needs a paid plan, and serving clients or customers needs a Client plan.
What the fees are for
The regulations themselves are public. They belong to the agencies and other issuers that publish them, and we don’t charge for them. What our fees pay for is keeping them current: tracking changes, adding new and revised sections, marking superseded versions, checking quotes against the source, and delivering the current text.
Not permitted
You may not resell or redistribute the library’s text as a dataset or as a competing service, copy the library in bulk, use it to train or fine-tune AI models, share your key outside your organization, or try to get around usage limits.
Limits
Each key has a daily limit set by your plan. Calls over the limit are refused until the next day (UTC). We may also limit or pause service to protect it from abuse or overload.
Research, not legal advice
API results are research material, not legal advice. Every result includes a notice saying so. Confirm important requirements against the regulator’s own text.
Fees
Your order is the checkout or invoice you accept. Paid plans are billed monthly in advance through our payment processor and renew each month until you cancel; the month you paid for runs to its end. Client plans report their client counts each quarter, and we may ask once a year, on 30 days’ notice, for records that reasonably show them.
Suspension and termination
We may suspend or revoke a key if these terms are broken or fees go unpaid. You may stop using the API at any time.
Changes
We may change the API or these terms. We will give reasonable notice of changes that break existing uses.
Contact
Questions: earl@cfsynergies.com