ferrlens
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Legal document

Terms of service — FerrLens

Last updated: May 6, 2026

Last updated: 6 May 2026

This English translation is provided for convenience. The French version prevails in case of discrepancy.

1. Definitions

  • "FerrLens": the free web-tools suite edited by Bryan Ferrando — Entrepreneur individuel (FerrLabs), SIREN 104 243 951, accessible at ferrlens.com with an API at api.ferrlens.com.
  • "Tools": the utilities offered by FerrLens (SEO checks, DNS lookups, email-deliverability and SPF/DKIM/DMARC checks, security-header analysis, developer utilities, etc.).
  • "User": any person using the Tools or the API, with or without an account.
  • "Account": a free FerrLabs account that adds tool history and higher limits.
  • "Subscription": a paid plan (Pro) that adds batch processing and an API quota.

2. Acceptance

Use of the Service implies unreserved acceptance of these terms. The Customer acknowledges having read and accepted them prior to any subscription.

3. Service description

FerrLens provides:

  • A suite of free web tools, usable anonymously in the browser at ferrlens.com
  • An HTTP API at api.ferrlens.com that runs the same checks programmatically
  • For signed-in accounts: tool history and higher rate limits
  • For Pro subscribers: batch processing and a larger API quota

4. Access tiers and subscription

Current pricing is published at ferrlens.com/pricing. Access is offered at three levels:

  • Anonymous: free use of the Tools and API, subject to a per-IP rate limit
  • Account: free; adds tool history and higher rate limits
  • Pro: paid; adds batch processing and an API quota according to the published price schedule

Beyond the rate limit or quota of a given tier, requests may be throttled or rejected until the limit resets.

5. Payment

Payments are made through Stripe Inc. (United States, Data Privacy Framework certified), by credit card or SEPA direct debit. The Customer expressly authorizes monthly automatic debit. Each invoice is issued on the subscription anniversary date.

6. Term, renewal and termination

The Subscription is concluded without commitment, and is tacitly renewed each month on the anniversary date. The Customer can terminate at any time from their account area (termination takes effect at the end of the current billing period). No pro-rata refund.

In accordance with the French law of 16 August 2022, termination is accessible by means at least as simple as subscription.

7. Right of withdrawal (consumers only)

In accordance with article L.221-18 of the French Consumer Code, a Customer who is a consumer has a 14-day period to exercise their right of withdrawal. The Customer expressly waives this right by requesting immediate execution of the Service upon subscription. This waiver is materialized by the checkbox at payment time.

8. Acceptable use

The User undertakes to use the Tools and the API lawfully. In particular, the User must not:

  • Use a Tool to attack, probe or disrupt a third party without authorization, or to facilitate any intrusion, denial of service or other unlawful act against a system the User does not own or is not permitted to test
  • Circumvent the rate limit or API quota (rotating IPs, sharing tokens, automated scraping of the web interface)
  • Resell, redistribute or republish the Tools or their output as a competing service
  • Submit input that infringes a third party's rights or that is illegal under French law

The User is solely responsible for the input they submit and for how they use the results. They undertake to indemnify FerrLens against any claim, judgment, or defense costs arising from a misuse of the Tools or the API.

9. Availability and liability

FerrLens is provided on an "as is" basis as a free / freemium service. As such:

  • FerrLens makes no guarantee as to the accuracy or completeness of a Tool's results, which are informational and depend on third-party data sources (DNS, certificate authorities, remote servers, etc.)
  • FerrLens may rate-limit, throttle or temporarily suspend access to protect the service
  • To report abuse of the Tools or API, or a security issue, use the procedure published at ferrlens.com/abuse

10. Suspension and termination for cause

FerrLens may suspend or terminate access (including a Subscription), without notice or refund, in case of:

  • Use of the Tools or API to attack or abuse a third party
  • Circumvention of rate limits or API quota
  • Payment default of more than 15 days (Pro)
  • Serious breach of these terms
  • Attempted attack on the infrastructure (abuse, spam, fraud)

11. Personal data

Personal data is processed in accordance with the privacy policy published at ferrlens.com/privacy. FerrLens is the data controller for account data and for the limited data processed to run the Tools (such as a transiently used IP address for rate limiting). Anonymous tool inputs are processed for a single request and are not retained.

12. Intellectual property

  • The FerrLens source code, the "FerrLabs" and "FerrLens" trademarks, and all associated graphical elements remain the exclusive property of Bryan Ferrando — Entrepreneur individuel.
  • The input you submit to a Tool remains yours. You grant FerrLens only the transient, non-exclusive license needed to process that input and return the result for the duration of the request.

13. Limitation of liability

FerrLens is bound by an obligation of means. FerrLens's liability is limited to direct foreseeable damages and shall not exceed, in any event, the amounts paid by the Customer over the past 12 months. FerrLens is not liable for indirect damages (loss of revenue, loss of data not backed up by the Customer, reputational harm).

FerrLens is not liable in case of force majeure (infrastructure subcontractor outage, DDoS attack, network unavailability).

14. Modification of terms

FerrLens reserves the right to modify these terms. Any modification is notified to the Customer by email at least 30 days before its entry into force. Failing express opposition by termination within this period, the new terms are deemed accepted.

15. Applicable law and jurisdiction

These terms are governed by French law. For any dispute with a professional Customer, exclusive jurisdiction of the courts of Lille.

For any dispute with a consumer Customer, in accordance with article L.612-1 of the French Consumer Code, the Customer may have free recourse to a consumer mediator. Designated mediator: [À COMPLÉTER — ex : CMAP, Médicys].

16. Final provisions

The possible nullity of a stipulation does not entail the nullity of the whole. FerrLens's failure to exercise a right cannot be interpreted as a waiver.

French version: Conditions générales.