Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →

Exemplar 7 Complete, well-documented, and agent-ready

Stripe Radar APIStripe Radar provides real-time fraud protection and requires no additional development time. Fraud profess...81.1 Cloudflare Fraud Detection APIThe Fraud Detection API from Cloudflare — 1 operation(s) for fraud detection.80.6 Telesign Email Intelligence APIEmail Intelligence API (1 operations): Email Intelligence - Submit an email address to evaluate.72.0 Telesign Flow Builder APIThe Flow Builder solution is designed to streamline the creation, execution, and management of transactiona...72.0 Vonage Fraud Management APIFraud Management71.3 Mailboxlayer Email Validation APIREST/JSON API for real-time email validation: syntax check, typo suggestions, MX-record lookup, SMTP verifi...67.4 iDenfy Fraud Prevention and Risk APIAI risk scoring, proxy/VPN/Tor detection, phone validation, SMS phone verification, fraud probability estim...67.2

Strong 21 Solid coverage with minor gaps

Singular Custom Fraud Rules APIList, inspect, create, and delete custom fraud-prevention rules for an organization, with a metadata endpoi...65.8 Singular Publisher Blacklist APIRead and update the publisher blacklists used by Singular Fraud Prevention to block traffic from specific p...65.8 Orange Business Live Identity Captcha APIBehavioural and challenge-based human-verification (captcha) API used inside Orange's Live Identity suite t...65.3 Orange Business Live Identity Verify APIReal-time identity verification combining ID-document capture, liveness detection, and biometric match agai...65.3 Genome Verification of Payee APICheck a SEPA beneficiary's name or identifier against the account before sending a payment. Returns the EPC...63.9 Riskified Chargeback Guarantee APISubmit orders to Riskified for fraud and chargeback risk evaluation, in either a pre-authorization (Decide ...61.6 Stytch Fraud APIThe Fraud API from Stytch — 6 operation(s) for fraud.60.4 Amazon Voice ID APIAmazon Connect Voice ID provides real-time caller authentication and fraud risk detection to make voice int...59.2 DeviceCheck and App AttestDeviceCheck allows servers to set and query two bits of per-device state and to verify that a request is co...59.1 Clearbit Risk APIScores an email address for fraud and abuse risk. Endpoint /v1/calculate?email=. Verified live 2026-08-13 (...57.9 Mastercard Fraud APIThe Fraud API from Mastercard — 2 operation(s) for fraud.57.3 Mastercard ID VerificationIn this digital world, user identity fraud is on the rise due to inadequate digital identity verification m...57.3 Unico IDCloud APIThe API contract (internally TCA / Check.Integration) — used when the integrator's own application owns the...57.1 Socure RiskOS APIRiskOS is Socure's identity and fraud orchestration platform that combines ID+ modules, customer-configured...56.7 Claro Alerta APIDetects SIM-card or handset changes on a Claro Brasil mobile line and raises an alert, a Claro-branded comp...55.7 Claro Face Match APIBiometric face-match validation against Claro Brasil's own image records, sold as an identity-assurance ste...55.7 Claro Know Your Customer APIKYC Match-style API from Claro Brasil that validates user-supplied identity attributes — phone number, name...55.7 Claro Number Recycling APIDetects whether a Brazilian mobile number has changed owner — the recycling of a disconnected number to a n...55.7 Thomson Reuters Risk and Fraud APIRisk and Fraud APIs automate customer onboarding, identity verification, risk assessments, adverse media sc...55.5 DeviceCheck APIReduce fraudulent use of your services by managing device state and asserting app integrity.55.2 GSMA Camara Project Scam Signal APIScam Signal API allows businesses to protect their customers from impersonation scams, particularly Authori...54.3

Developing 20 Usable, with meaningful gaps to close

ChainAware A2A Agent and x402 APIAgent-facing surface on api.chainaware.ai: an A2A 0.3.0 agent card at /.well-known/agent-card.json (also at...52.1 ChainAware Behavioural Prediction MCP ServerHosted Model Context Protocol server over Server-Sent Events at https://prediction.mcp.chainaware.ai/sse (h...52.1 MTN Group Fraud Management APIThe Fraud Management API from MTN Group — 2 operation(s) for fraud management.52.1 Google Play Integrity APIVerify that interactions and server requests come from genuine apps on genuine Android devices.49.8 Pagar.me Disputes & Chargebacks APIList and retrieve disputes (disputas) and chargebacks raised against the merchant's transactions, including...49.6 Bird Identity Verification APIVerify the identity of your customers programmatically to enable additional services such as two-factor aut...48.6 Worldpay Beneficiary Account Verifications APIValidate beneficiary bank account details before initiating payouts to reduce failed transfers and fraud. S...48.6 Worldpay Fraudsight APIThe Fraudsight API from Worldpay — 1 operation(s) for fraudsight.48.6 SafetyKit Data APIIngest user actions and objects into per-workflow namespaces and asynchronously receive AI agent decisions ...47.7 Play Integrity APIThe Play Integrity API helps protect your apps and games from potentially risky and fraudulent interactions...47.6 Equifax APIThe Equifax API platform provides programmatic access to Equifax's consumer credit information, including c...45.8 Conekta anti Fraud APIThe anti Fraud API from Conekta — 4 operation(s) for anti fraud.44.6 SEON Device IntelligenceSEON Device Intelligence is the device-fingerprinting product surfaced through JavaScript, iOS, Android, Fl...44.1 SEON Fraud APIThe Fraud API from SEON — 1 operation(s) for fraud.44.1 Castle APICastle's REST API for real-time fraud and abuse detection. The Risk API scores authenticated user events (l...43.8 Discover Enhanced Decisioning APIDiscover Enhanced Decisioning API is a powerful tool that allows businesses to make smarter and faster deci...43.5 Discover Fraud AlertsDiscover Fraud Alerts is a service provided by Discover Financial Services that helps protect cardholders f...43.5 Cequence API SpartanAPI Spartan provides runtime protection against malicious and unwanted API traffic, including account takeo...41.2 Alterya (Chainalysis)AI-powered fraud prevention product (acquired by Chainalysis) that identifies scams and fraud-victim relati...40.3 Commonwealth Bank NameCheck APIDocumented in CommBank's business API catalogue: NameCheck is a security tool that helps organisations and ...39.4

Thin 29 Limited public surface area

Ravelin PSP APIA purpose-built API surface for Payment Service Providers (PSPs) embedding Ravelin's risk scoring and dispu...37.7 Subex Fraud Management APIFraud detection and case management36.7 FedNow Network Intelligence APIRisk Mitigation API providing fraud-prevention and risk signals across the FedNow network to participating ...36.6 Verifone 3D Secure APISCA-compliant cardholder authentication with frictionless and challenge flows. The 3D Secure API provides S...35.1 LexisNexis EmailageLexisNexis Emailage is an email and IP address fraud-risk scoring API acquired by LexisNexis Risk Solutions...35.0 Telefónica Line Tenure APIThe Line Tenure API indicates how long a mobile number has belonged to its current user, providing a fraud ...34.3 Telefónica Scam Signal APIThe Scam Signal API enables companies to protect their customers from phishing scams and voice fraud by det...34.3 CyberSource Decision Manager APIREST API for the Decision Manager Service33.8 CyberSource Payer Authentication (3D Secure) APIImplements 3D Secure 2.x authentication to reduce fraud liability and enable frictionless payment experienc...33.8 HyperVerge Liveness DetectionPassive liveness / presentation-attack detection from a single selfie, trained on 850M+ liveness checks. De...33.5 Cielo 3DS 2.2 Authentication APICielo 3DS 2.2 is an EMVCo-compliant cardholder authentication service exposed via the Braspag MPI endpoint....32.7 Consumer Sentinel NetworkConsumer Sentinel is the FTC's secure online database of consumer reports of fraud, identity theft, and oth...32.7 Aduna Number Verification APIAduna's aggregated implementation of the CAMARA Number Verification API (v2.1), confirming possession of a ...32.3 Aduna SIM Swap APIAduna's aggregated implementation of the CAMARA SIM Swap API, returning real-time information about recent ...32.3 Acuant Ozone APIDigital identity trust API derived from Acuant's acquisition of Ozone from Mount Airy Group. Provides addit...31.0 Unit21 APIREST API for ingesting entities, instruments, and transaction events into the Unit21 risk and compliance pl...31.0 Fideo Verify & Signals APIFideo's real-time REST API for identity verification, fraud risk scoring, and identity intelligence. Two en...30.8 hCaptcha EnterprisehCaptcha Enterprise extends the core challenge with advanced bot detection, account defense (ATO and fake-a...30.6 Cuscal Card Controls APICMS REST API letting cardholders and back-office staff control and restrict card usage - locking and unlock...30.2 Device Swap APIIdentifies recent changes of the device associated with a mobile number to flag potential fraud and verify ...29.4 SIM Swap APIDetects recent SIM card changes for a given mobile number to help prevent account takeover and fraud.29.4 Incode anti Fraud APIThe anti Fraud API from Incode — 1 operation(s) for anti fraud.29.2 Picker anti Fraud APIThe anti Fraud API from Picker — 2 operation(s) for anti fraud.28.6 Signifyd Account Protection APIScore and protect non-purchase customer journeys — Account Opening, Login, and Modification events — agains...26.4 Signifyd Decisions APIProgrammatically retrieve guarantee decisions, case details, and policy results for orders submitted to Sig...26.4 Signifyd Feedback APIReport observed user outcomes back to Signifyd to close the loop between real-time decisions and production...26.4 Signifyd Returns APISubmit return events for evaluation by Signifyd's Return Insights and Return Abuse Prevention models. Helps...26.4 Signifyd Sale (Checkout) APISubmit checkout and sale events to Signifyd's Commerce Protection Platform for real-time fraud and chargeba...26.4 Signifyd Transaction APISubmit finalized order and payment transaction details after authorization. Enables Signifyd to reconcile t...26.4

Emerging 33 Early or largely undocumented

TransUnion Global Developer PortalTransUnion's API products for credit reporting, identity verification, fraud prevention and consumer risk d...26.1 TransUnion TruValidate Device RiskDevice recognition and fraud signals, formerly iovation FraudForce. Mobile SDKs collect a device "blackbox"...26.1 Paysafe 3D Secure APIThe 3D Secure v2 API provides strong customer authentication (SCA) for card transactions in line with PSD2 ...25.7 GrabDefence Risk Evaluation APIGrabDefence exposes Grab's internal fraud, abuse, and risk evaluation platform as an API for partners — cov...25.2 Nivelo Scorer APINivelo's real-time ACH return-risk scoring API. A RESTful endpoint that accepts ACH transaction data as JSO...25.1 Jumio Risk Signals APIReturns enriched risk-signal data on a user (device, behavioural, network, and identity-graph signals) for ...24.5 DataVisor dEdge Device Intelligence WebAPIDevice intelligence surface. The dEdge SDK is embedded in an iOS app, Android app or HTML5 web page, sends ...23.9 DataVisor Fraud and Risk Platform APIReal-time fraud and risk detection API surface. Customers stream user events and transactions to a DataViso...23.9 DataDome Account ProtectAccount Protect targets account takeover, fake account creation, and post-login abuse using behavioral, dev...22.9 BICS Fraud Prevention and Reachability APINetwork-signal services for fraud prevention and mobile identity - HLR and reachability lookup (operator, p...22.2 BICS Number Verification APIPhone number verification and mobile authentication for anti-fraud, KYC and onboarding - validating that a ...22.2 Overhaul FraudWatch APICarrier and driver verification and risk-scoring service that lets shippers vet carriers before booking, re...22.0 Sardine Customer APISubmit customer profile and onboarding signals (KYC, KYB, document verification, sanctions/PEP screening, i...21.4 Sardine Device Intelligence APICapture device, network, and behavioral signals from web, iOS, and Android SDKs and resolve them to a Sardi...21.4 Sardine Issuing APIReal-time card authorization fraud scoring for card issuers. Returns an approve/decline/step-up recommendat...21.4 Sardine Transaction APISubmit payment, ACH, wire, card, and crypto transactions for real-time fraud scoring and AML transaction mo...21.4 CARFAX VIN Scan Detail APIDelivers comprehensive VIN-level data in ten groupings including vehicle description, demographic informati...20.0 American Express Enhanced Authorization (EA)American Express Enhanced Authorization (EA) is a fraud prevention tool that helps protect cardholders and ...18.9 Checkout.com Disputes & Risk APIManage chargebacks, disputes, AML screening and identity verification.18.6 SingVerify Device Location APIVerifies whether a mobile device is within an expected area or country at the time of a login or transactio...18.6 SingVerify Device Roaming APIReports whether a subscriber's device is currently roaming outside Singapore, used as a risk signal in frau...18.6 SingVerify Number Verify APINetwork-based verification that the mobile number a user declares is the number of the SIM the request is a...18.6 SingVerify Scam Sniffer APIDetects whether a user is on an active voice call at the moment they attempt a high-value transaction, a si...18.6 SingVerify SIM Swap APIReal-time signal indicating whether the SIM bound to a mobile number has been changed recently, so that a r...18.6 First Data Gateway (IPG)The First Data Gateway, marketed by Fiserv as the Internet Payment Gateway (IPG) and documented on the Fise...16.7 LexisNexis Risk SolutionsLexisNexis Risk Solutions offers fraud detection, identity verification, and risk orchestration capabilitie...15.5 LexisNexis ThreatMetrixThreatMetrix delivers digital identity intelligence and behavioral analytics for fraud prevention across us...15.5 Block SIMPartner API for blocking a SIM (e.g. lost-or-stolen) on the Vodafone network on behalf of an authenticated ...14.6 Call DivertIndicates whether call forwarding is currently active on the target number — a useful signal for fraud-dete...14.6 SIM Swap (CAMARA)CAMARA SIM Swap API that returns the timestamp of the most recent SIM change for a given MSISDN (latestSimC...14.6 TenureReturns how long the current subscriber has held the MSISDN — short tenure is a strong signal in fraud-scor...14.6 HUMAN Transaction Abuse DefenseTransaction Abuse Defense extends HUMAN's signals into checkout, payment, and high-value transaction flows ...13.7 Metromile Enterprise APIREST API platform for property and casualty insurance carriers enabling touchless claims automation, digita...11.2

Minimal 7 Almost no public developer surface

PNC Account Verification Services APIAccount Verification Services API from PNC's developer portal for confirming the ownership and status of ba...10.6 Home Network APIVerify whether a customer's phone is currently connected to EE's mobile network, supporting risk decisionin...10.1 SIM Swap Detection APIQuery when a mobile subscriber's SIM was last changed so relying parties can detect SIM-swap account-takeov...10.1 TIM Device LocationCAMARA Device Location verification API offered by TIM Brasil Open Gateway. Confirms whether a mobile devic...9.9 TIM IP to MSISDNGiven an IP address observed by a relying party, returns the TIM mobile number (MSISDN) currently associate...9.9 TIM IP to NumberGiven an IP address, returns the TIM fixed-line or mobile number associated with the session. Extends IP-to...9.9 TIM SIM SwapCAMARA-aligned API that returns the timestamp of the last SIM swap (or whether a swap occurred within a cal...9.9

Companies reaching this through an API (34)

These companies publish an API, specification or operation carrying “Fraud Prevention” but do not classify their business under it. Listed unranked and kept out of the count above, because one tagged operation is not a statement about what a company does.

Score breakdown

Frequency

69.1

log-scaled weighted occurrences

Breadth

5.7

spread across providers

Quality lift

29.6

mean composite of providers using it

Cohesion

15.7

strength of nearest seed neighbor

Where this tag sits

254 providers carry this tag directly, and 256 counting the 1 narrower tag below — 2 more to reach.

Account Takeover 18 providers

Where this tag comes from

Provider tag258

Api tag117

Openapi tag8

Openapi op tag18

Markets provisional

Kin Score markets whose measured providers carry this tag. Share is the fraction of the market's measured providers that carry it — it describes the market, not this tag.

Market	Share of the market's providers
RegTech, AML/KYC and Money Transmission	40%
Biometrics Testing (biometric recognition vendors, identity verification depth)	38%
GLEIF LEI Issuers (Legal Entity Identifier infrastructure)	23%

Cohort brief

Auto-generated

The 239 providers in the APIs.io catalog tagged Fraud Prevention, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers

239

of 254 in the catalog

Mean Kin Score

29.3

+7.1 vs catalog 22.2

Mean Agent Readiness

17.6

+5.6 vs catalog 12

Spread

0–74.7

median 26.7 · σ 18.3

How the 239 split by band

Exemplar 6Strong 19Developing 54Thin 47Emerging 62Minimal 51

Facet averages, against the whole catalog

Facet	This cohort	Catalog	Difference	Scored
Developer Ergonomics	32.8	23.2	+9.6	239
Contract Quality	25.6	17.2	+8.4	239
Operational Transparency	19.4	13	+6.4	239
Discoverability	63.4	57.9	+5.5	239
Access Clarity	29.4	23.9	+5.5	239
Contract Governance	8.9	6.5	+2.4	239

A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.

What this cohort publishes

Artifact	This cohort	Catalog	Difference
MCP server (any)	14%	13%	+1
MCP server (first-party)	13%	12%	+1
Agent Skills	0%	0%	0
OAuth scopes	13%	11%	+2
Security	97%	98%	-1
Arazzo workflows	2%	2%	0
Governance rules	14%	16%	-2

mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.

Top by Kin Score

Work with this as data

Every tag here is available over the APIs.io API and to AI agents over MCP.

MCP server

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https://apis.io/mcp

Tools for tags

7 MCP tools reach this

find_tagsBrowse and filter every tag in the catalog.
get_cohortThis tag as a scored cohort — every provider carrying it, with scores.
cohort_statsPRO — the distribution across this tag: mean, median, band split, adoption rates.
cohort_rankingsPRO — the leaderboard, on composite AND agent-readiness axes.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

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This tag

curl "https://apis.io/api/v1/tags/fraud-prevention"

All tags

curl "https://apis.io/api/v1/tags?limit=25"

As a scored cohort

curl "https://apis.io/api/v1/cohorts/tag/fraud-prevention"

The distribution (Pro)

curl "https://apis.io/api/v1/cohorts/tag/fraud-prevention/stats" \
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Fraud Prevention

Providers using this tag (254)

APIs with this tag (117)