≈ 44visits/mo
Use not read yet · estimate, read Oct 14, 2026
- For
- Developers and product teams blocking fake signups and risky card payments in their apps
- Price
- Free plan · From $29/mopricing page, read Oct 19, 2026Trial & discounts: 30-day money back
- Activity
- Actively maintainedsite updated 3 weeks ago
- Runs as
- API
- Used for
- block throwaway-email signups before accounts get created
- refund risky Stripe payments before chargebacks are filed
- flag repeated signups coming from one IP address
- Has an MCP server (1 in the registry)public registry →
- Publishes llms.txt, a file written for AI assistantsfidro.io ↗
- Trains on your dataYesprivacy policy ↗
- Certifications they stateGDPR · CCPAprivacy policy ↗
- Privacy policy updated2026-09-06privacy policy ↗
“We use submitted data to: Train machine learning models for improved fraud detection.”
privacy policy ↗
These are Fidro's own statements, read from its pages. We did not audit them. A line that is missing was not found on the pages we read; it does not mean the practice is absent.
- MCP serverio.fidro/fidroverified in the MCP registry
- Stateanswers, requires sign-inchecked 2026-10-19
- Address to connectfidro.io/mcp
- API docsfidro.io/docs/apithe vendor's page ↗
- MCP docsfidro.io/mcpthe vendor's page ↗
This card as JSON, for your agent →
Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.
Figure and bar: visits/mo, estimate · year: online since
- #1
LayerCallMCP · open
API that scores signups, IPs, emails, phones, domains and devices for fraud risk in a single call.
436ActiveFrom $49/mo - #2
Email List ValidationMCP · open
Verifies email lists for deliverability, flagging invalid, risky and role-based addresses, spam traps and complainers, then exports cleaned segments.
156ActiveFrom $14/mo - #3
Kaidn
Checks signups, logins and payouts for fraud through one API call, returning a verdict and a plain-language reason.
18ActiveFrom $39/mo - #4
MudraID
Issues cryptographic identities and scoped revocable grants to AI agents, checks each action against policy, and records allow or deny evidence.
23 linking domainsFrom $99/mo - #5
MailValidMCP · open
Verifies email addresses through syntax, domain MX and mailbox SMTP checks, flagging disposable, role-based and catch-all addresses.
47ActiveFrom $29/mo - #6
Lumo by Proton
Provides encrypted email, calendar, cloud storage, password manager and VPN under one Proton account, with the Lumo chat assistant as an add-on.
3.4MActiveFree plan2014
Not it? Say what you need
betaThree tools from the Atlas for the job you describe, each with what fits and what does not.
No notes yet. What do you use Fidro for?
Sign in to leave a noteWhat is Fidro?
Scores signups, logins and Stripe charges for fraud using email, IP and past activity, then recommends allow, challenge or block. It is listed in the Atlas under Security.
Who is Fidro for?
Developers and product teams blocking fake signups and risky card payments in their apps
How much does Fidro cost?
Fidro has a free plan; paid plans start at $29/mo, per its pricing page on 2026-10-19.
Is Fidro free?
Yes, Fidro has a free plan, per its pricing page on 2026-10-19.
Is Fidro still maintained?
Actively maintained: site updated 3 weeks ago.
Does Fidro train AI on your data?
Yes, per its privacy policy (2026-10-19): “We use submitted data to: Train machine learning models for improved fraud detection.”
Is Fidro safe?
We do not audit vendors. What Fidro publishes, read 2026-10-19: GDPR, CCPA stated on its privacy policy; on training with your data, “We use submitted data to: Train machine learning models for improved fraud detection.”.
How do I cancel Fidro?
In its own words (pricing page, 2026-10-19): “You can cancel at any time from your account settings.”
Does Fidro give refunds?
In its own words (terms of service, 2026-10-19): “All fees are non-refundable except as expressly stated in these Terms.”
What are alternatives to Fidro?
In Security, by use: LayerCall, Email List Validation, Kaidn, MudraID, MailValid, Lumo by Proton.
How we read a tool
No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.
- Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
- Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
- Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
- The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.
How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.
How we read every tool → · By INITE Atlas Desk