FFraud

FFraud provides a free, open fraud detection API that scores IP addresses, email addresses, and device identifiers. It identifies VPNs, proxies, Tor exits, disposable email domains, and device fingerprints, returning a numeric risk score and detailed flags. The service is offered without usage caps, no credit‑card required, and includes a public blocklist as MIT‑licensed data. Documentation, pricing, and terms are openly available on the site.

FFraud publishes 8 API contracts indexed on the APIs.io network, including Account API, Community API, Compatibility API, and 5 more. Tagged areas include Fraud Prevention, IP Lookup, Email Verification, Device Fingerprinting, and Open Data.

The FFraud catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

FFraud’s developer surface includes authentication, pricing, engineering blog, API reference, documentation, and 19 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

48.2/100 developing Agent 33/100 agent ready Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreeSelf serve⚡ Free to try

1 published contract 1 Agent Skills

Fraud Prevention IP Lookup Email Verification Device Fingerprinting Open Data

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 48.2/100 · developing

Contract Quality 13.0 / 21

Developer Ergonomics 6.4 / 17

Access Clarity 9.0 / 17

Operational Transparency 2.6 / 11

Contract Governance 3.6 / 10

Discoverability 5.6 / 9

Regulatory Posture 2.8 / 15

Agent readiness — 33/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Government & Public Sector regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented) Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document Ask about this →
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented) Ask about this →
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks Ask about this →
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too Ask about this →

5 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Developer Ergonomics scores 37.4 — up to +12.5 composite points Ask about this →
Operational Transparency scores 23.8 — up to +9.9 composite points Ask about this →
Contract Quality scores 61.3 — up to +9.7 composite points Ask about this →

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/ffraud-com/apis.yml: open an issue on github.com/api-evangelist/ffraud-com to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 2

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

OpenAPI

measured — observed by APIs.io (published)

APIs 8

Individual APIs this provider publishes, each with its own machine-readable definition.

FFraud Account API

API keys and usage. Requires a free account.

FFraud Community API

Report abusive IPs and read the community database. No account needed to report.

FFraud Compatibility API

Drop-in replacements for AbuseIPDB, IPQualityScore, and ipinfo.

FFraud Device API

A stable ID and a risk score for every device on your site.

FFraud Domain API

Domain reputation.

FFraud Email API

Temporary, alias and abusive email detection, typo suggestions and mail servers.

FFraud IP API

IP fraud intelligence lookups.

FFraud System API

Health and live counts.

Scroll for all 8

Agent Skills 1

Packaged agent skills for driving this provider's APIs from an AI assistant.

basic

AGENT SKILL

FFraud API pricing

Prices published by FFraud, read 2026-11-09 from ffraud.com/pricing.

Plan	Price
Free	$0

Plan details, limits and sources →

Rate limits

Public ( /public/* ): Hundreds of requests per second
Authenticated ( /v1/* ): Hundreds of requests per second

Rate-limit details →

Pricing Plans 1

Published pricing tiers and plan structures.

FFraud Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

FFraud Rate Limits

2 limits

RATE LIMITS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Ffraud Com Context

23 classes · 123 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

FFraud API Rules

65 rules · 57 error-severity 6 warn-severity 2 info-severity

SPECTRAL

JSON Schema 6

Standalone JSON Schema definitions for this provider's data models.

DomainResponse

10 properties

JSON SCHEMA

EmailReportRequest

3 properties

JSON SCHEMA

EmailResponse

24 properties

JSON SCHEMA

IpResponse

51 properties

JSON SCHEMA

ReportRequest

4 properties

JSON SCHEMA

Report

8 properties

JSON SCHEMA

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

FFraud Authentication

1 scheme

SECURITY

FFraud Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access (API Evangelist recommendations) 1

Recommended x-agentic-access execution contracts for AI agents.

FFraud Agentic Access

25 operations · 11 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

Login

Documentation 2

Reference material describing how the API behaves

APIReference

APIReference

Documentation

Documentation

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

AgentSkill

AgentSkill

LLMsTxt

LLMsTxt

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

ErrorCatalog

Conformance

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

Plans

TermsOfService

PrivacyPolicy

Pricing

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: ffraud-com
name: FFraud
accessModel:
  pricing: free
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Free · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  generated: '2026-11-13'
  method: derived
image: https://ffraud.com/main/og-card.png
description: FFraud provides a free, open fraud detection API that scores IP addresses, email addresses, and device identifiers.
  It identifies VPNs, proxies, Tor exits, disposable email domains, and device fingerprints, returning a numeric risk score
  and detailed flags. The service is offered without usage caps, no credit‑card required, and includes a public blocklist
  as MIT‑licensed data. Documentation, pricing, and terms are openly available on the site.
url: https://artifacts.apis.io/ffraud-com/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-09 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-09'
modified: '2026-11-09'
tags:
- Fraud Prevention
- IP Lookup
- Email Verification
- Device Fingerprinting
- Open Data
tags_raw:
- fraud detection
- IP lookup
- email verification
- device fingerprinting
- API
- open data
- free service
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/ffraud-com-agentic-access.yml
- type: RateLimits
  url: rate-limits/ffraud-com-rate-limits.yml
- type: Plans
  url: plans/ffraud-com-plans-pricing.yml
- type: Spectral
  url: rules/ffraud-com-rules.yml
- type: JSONLD
  url: json-ld/ffraud-com-context.jsonld
- type: Vocabulary
  url: vocabulary/ffraud-com-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/ffraud-com-data-model.yml
- type: Authentication
  url: authentication/ffraud-com-authentication.yml
- type: ErrorCatalog
  url: errors/ffraud-com-problem-types.yml
- type: Conformance
  url: conformance/ffraud-com-conformance.yml
- type: LLMsTxt
  url: llms/ffraud-com-llms.txt
- type: Hosts
  url: hosts/ffraud-com-hosts.yml
- type: Vendors
  url: vendors/ffraud-com-vendors.yml
- type: TermsOfService
  url: https://ffraud.com/terms
- type: PrivacyPolicy
  url: https://ffraud.com/privacy
- type: Pricing
  url: https://ffraud.com/pricing
- type: Login
  url: https://ffraud.com/login
- type: GitHubOrganization
  url: https://github.com/FFraud-com
- type: Blog
  url: https://ffraud.com/blog
- type: APIReference
  url: https://ffraud.com/llms.txt
- type: DomainSecurity
  url: security/ffraud-com-domain-security.yml
- type: Website
  url: https://ffraud.com
- type: Documentation
  url: https://ffraud.com/docs
apis:
- aid: ffraud-com:ffraud-com-account-api
  name: FFraud Account API
  description: API keys and usage. Requires a free account.
  humanURL: https://ffraud.com/docs
  baseURL: https://api.ffraud.com
  tags:
  - Account
  properties:
  - type: OpenAPI
    url: openapi/ffraud-com-account-api-openapi.yml
- aid: ffraud-com:ffraud-com-community-api
  name: FFraud Community API
  description: Report abusive IPs and read the community database. No account needed to report.
  humanURL: https://ffraud.com/docs
  baseURL: https://api.ffraud.com
  tags:
  - Community
  properties:
  - type: OpenAPI
    url: openapi/ffraud-com-community-api-openapi.yml
  - type: JSONSchema
    url: json-schema/ffraud-com-report-request-schema.json
  - type: JSONSchema
    url: json-schema/ffraud-com-report-schema.json
- aid: ffraud-com:ffraud-com-compatibility-api
  name: FFraud Compatibility API
  description: Drop-in replacements for AbuseIPDB, IPQualityScore, and ipinfo.
  humanURL: https://ffraud.com/docs
  baseURL: https://api.ffraud.com
  tags:
  - Compatibility
  properties:
  - type: OpenAPI
    url: openapi/ffraud-com-compatibility-api-openapi.yml
- aid: ffraud-com:ffraud-com-device-api
  name: FFraud Device API
  description: A stable ID and a risk score for every device on your site.
  humanURL: https://ffraud.com/docs
  baseURL: https://api.ffraud.com
  tags:
  - Device
  properties:
  - type: OpenAPI
    url: openapi/ffraud-com-device-api-openapi.yml
- aid: ffraud-com:ffraud-com-domain-api
  name: FFraud Domain API
  description: Domain reputation.
  humanURL: https://ffraud.com/docs
  baseURL: https://api.ffraud.com
  tags:
  - Domain
  properties:
  - type: OpenAPI
    url: openapi/ffraud-com-domain-api-openapi.yml
  - type: JSONSchema
    url: json-schema/ffraud-com-domain-response-schema.json
- aid: ffraud-com:ffraud-com-email-api
  name: FFraud Email API
  description: Temporary, alias and abusive email detection, typo suggestions and mail servers.
  humanURL: https://ffraud.com/docs
  baseURL: https://api.ffraud.com
  tags:
  - Email
  properties:
  - type: OpenAPI
    url: openapi/ffraud-com-email-api-openapi.yml
  - type: JSONSchema
    url: json-schema/ffraud-com-email-response-schema.json
  - type: JSONSchema
    url: json-schema/ffraud-com-email-report-request-schema.json
- aid: ffraud-com:ffraud-com-ip-api
  name: FFraud IP API
  description: IP fraud intelligence lookups.
  humanURL: https://ffraud.com/docs
  baseURL: https://api.ffraud.com
  tags:
  - IP
  properties:
  - type: OpenAPI
    url: openapi/ffraud-com-ip-api-openapi.yml
  - type: JSONSchema
    url: json-schema/ffraud-com-ip-response-schema.json
- aid: ffraud-com:ffraud-com-system-api
  name: FFraud System API
  description: Health and live counts.
  humanURL: https://ffraud.com/docs
  baseURL: https://api.ffraud.com
  tags:
  - System
  properties:
  - type: OpenAPI
    url: openapi/ffraud-com-system-api-openapi.yml
x-submission-notes: Free fraud detection API for IPs, emails, devices; OpenAPI at /openapi.json
x-submission-probe: root 200, nonsense 404, OpenAPI 200 json
x-enrichment:
  date: '2026-11-09'
  status: enriched
  artifacts_added: 23
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

FFraud API — frequently asked questions

Does FFraud have an API?

Yes. APIs.io lists 8 APIs from FFraud, including FFraud Account API, FFraud Community API and FFraud Compatibility API, and 5 more.

Is there an OpenAPI specification for the FFraud API?

Yes. APIs.io indexes 8 OpenAPI specifications for FFraud, each linked for download from this page.

How do I authenticate with the FFraud API?

FFraud uses bearer-token authentication (1 scheme). The details are profiled on APIs.io as FFraud Authentication.

How much does the FFraud API cost?

FFraud publishes its prices; its Free plan is $0 as of 2026-11-09. APIs.io lists 1 pricing plan for FFraud, with each plan's price, limits and inclusions under Pricing on this page.

Is the FFraud API ready for AI agents?

FFraud has a Kin Score of 48.2 out of 100 (developing) and an Agent Readiness score of 33.0 (agent-ready), scored by API Evangelist on 2026-11-13.

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