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 9 Complete, well-documented, and agent-ready

Cloudflare Fraud Detection APIThe Fraud Detection API from Cloudflare — 1 operation(s) for fraud detection.82.5 Stripe Radar APIStripe Radar provides real-time fraud protection and requires no additional development time. Fraud profess...82.0 Amazon Voice ID APIAmazon Connect Voice ID provides real-time caller authentication and fraud risk detection to make voice int...79.0 Telesign Email Intelligence APIEmail Intelligence API (1 operations): Email Intelligence - Submit an email address to evaluate.77.0 Telesign Flow Builder APIThe Flow Builder solution is designed to streamline the creation, execution, and management of transactiona...77.0 Vonage Fraud Management APIFraud Management68.8 Mailboxlayer Email Validation APIREST/JSON API for real-time email validation: syntax check, typo suggestions, MX-record lookup, SMTP verifi...67.8 Thomson Reuters Risk and Fraud APIRisk and Fraud APIs automate customer onboarding, identity verification, risk assessments, adverse media sc...66.9 iDenfy Fraud Prevention and Risk APIAI risk scoring, proxy/VPN/Tor detection, phone validation, SMS phone verification, fraud probability estim...66.8

Strong 22 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...65.9 Singular Publisher Blacklist APIRead and update the publisher blacklists used by Singular Fraud Prevention to block traffic from specific p...65.9 Cloudmersive Fraud Detection APIFraud Detection operations of the Cloudmersive Fraud Detection AI API — 2 operation(s) served from https://...65.8 Genome Verification of Payee APICheck a SEPA beneficiary's name or identifier against the account before sending a payment. Returns the EPC...64.7 Google Play Integrity APIVerify that interactions and server requests come from genuine apps on genuine Android devices.64.6 Orange Business Live Identity Captcha APIBehavioural and challenge-based human-verification (captcha) API used inside Orange's Live Identity suite t...64.2 Orange Business Live Identity Verify APIReal-time identity verification combining ID-document capture, liveness detection, and biometric match agai...64.2 Riskified Chargeback Guarantee APISubmit orders to Riskified for fraud and chargeback risk evaluation, in either a pre-authorization (Decide ...64.0 Play Integrity APIThe Play Integrity API helps protect your apps and games from potentially risky and fraudulent interactions...63.0 Socure RiskOS APIRiskOS is Socure's identity and fraud orchestration platform that combines ID+ modules, customer-configured...60.4 Stytch Fraud APIThe Fraud API from Stytch — 6 operation(s) for fraud.59.7 Clearbit Risk APIScores an email address for fraud and abuse risk. Endpoint /v1/calculate?email=. Verified live 2026-08-13 (...59.3 GSMA Camara Project Scam Signal APIScam Signal API allows businesses to protect their customers from impersonation scams, particularly Authori...58.8 Unico IDCloud APIThe API contract (internally TCA / Check.Integration) — used when the integrator's own application owns the...58.5 DeviceCheck and App AttestDeviceCheck allows servers to set and query two bits of per-device state and to verify that a request is co...57.3 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 MTN Group Fraud Management APIThe Fraud Management API from MTN Group — 2 operation(s) for fraud management.55.4 Claro Alerta APIDetects SIM-card or handset changes on a Claro Brasil mobile line and raises an alert, a Claro-branded comp...55.1 Claro Face Match APIBiometric face-match validation against Claro Brasil's own image records, sold as an identity-assurance ste...55.1 Claro Know Your Customer APIKYC Match-style API from Claro Brasil that validates user-supplied identity attributes — phone number, name...55.1 Claro Number Recycling APIDetects whether a Brazilian mobile number has changed owner — the recycling of a disconnected number to a n...55.1

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...54.1 ChainAware Behavioural Prediction MCP ServerHosted Model Context Protocol server over Server-Sent Events at https://prediction.mcp.chainaware.ai/sse (h...54.1 Pagar.me Disputes & Chargebacks APIList and retrieve disputes (disputas) and chargebacks raised against the merchant's transactions, including...53.8 DeviceCheck APIReduce fraudulent use of your services by managing device state and asserting app integrity.52.9 Castle APICastle's REST API for real-time fraud and abuse detection. The Risk API scores authenticated user events (l...51.8 SEON Device IntelligenceSEON Device Intelligence is the device-fingerprinting product surfaced through JavaScript, iOS, Android, Fl...50.9 SEON Fraud APIThe Fraud API from SEON — 1 operation(s) for fraud.50.9 Bird Identity Verification APIVerify the identity of your customers programmatically to enable additional services such as two-factor aut...49.3 Worldpay Beneficiary Account Verifications APIValidate beneficiary bank account details before initiating payouts to reduce failed transfers and fraud. S...48.9 Worldpay Fraudsight APIThe Fraudsight API from Worldpay — 1 operation(s) for fraudsight.48.9 SafetyKit Data APIIngest user actions and objects into per-workflow namespaces and asynchronously receive AI agent decisions ...47.5 Equifax APIThe Equifax API platform provides programmatic access to Equifax's consumer credit information, including c...47.1 Discover Enhanced Decisioning APIDiscover Enhanced Decisioning API is a powerful tool that allows businesses to make smarter and faster deci...44.8 Discover Fraud AlertsDiscover Fraud Alerts is a service provided by Discover Financial Services that helps protect cardholders f...44.8 Cequence API SpartanAPI Spartan provides runtime protection against malicious and unwanted API traffic, including account takeo...43.8 Conekta anti Fraud APIThe anti Fraud API from Conekta — 4 operation(s) for anti fraud.43.7 Commonwealth Bank NameCheck APIDocumented in CommBank's business API catalogue: NameCheck is a security tool that helps organisations and ...43.4 Alterya (Chainalysis)AI-powered fraud prevention product (acquired by Chainalysis) that identifies scams and fraud-victim relati...42.3 Autohost Fraud APIThe Fraud API from Autohost — 1 operation(s) for fraud.42.0 Ravelin PSP APIA purpose-built API surface for Payment Service Providers (PSPs) embedding Ravelin's risk scoring and dispu...40.4

Thin 30 Limited public surface area

AT&T Mobility Threat and Anomaly Detection APIUses machine learning to identify threats and unusual activity on mobile devices on the AT&T network. Provi...39.0 AT&T SIM Swap APICAMARA-standard API that checks when SIM cards associated with mobile numbers have changed. Enables applica...39.0 LexisNexis EmailageLexisNexis Emailage is an email and IP address fraud-risk scoring API acquired by LexisNexis Risk Solutions...37.4 Subex Fraud Management APIFraud detection and case management36.1 Fideo Verify & Signals APIFideo's real-time REST API for identity verification, fraud risk scoring, and identity intelligence. Two en...35.0 Aduna Number Verification APIAduna's aggregated implementation of the CAMARA Number Verification API (v2.1), confirming possession of a ...34.9 Aduna SIM Swap APIAduna's aggregated implementation of the CAMARA SIM Swap API, returning real-time information about recent ...34.9 Checkout.com Disputes & Risk APIManage chargebacks, disputes, AML screening and identity verification.34.7 FedNow Network Intelligence APIRisk Mitigation API providing fraud-prevention and risk signals across the FedNow network to participating ...34.5 Verifone 3D Secure APISCA-compliant cardholder authentication with frictionless and challenge flows. The 3D Secure API provides S...33.8 Incode anti Fraud APIThe anti Fraud API from Incode — 1 operation(s) for anti fraud.33.7 HyperVerge Liveness DetectionPassive liveness / presentation-attack detection from a single selfie, trained on 850M+ liveness checks. De...32.9 Telefónica Line Tenure APIThe Line Tenure API indicates how long a mobile number has belonged to its current user, providing a fraud ...32.7 Telefónica Scam Signal APIThe Scam Signal API enables companies to protect their customers from phishing scams and voice fraud by det...32.7 Unit21 APIREST API for ingesting entities, instruments, and transaction events into the Unit21 risk and compliance pl...32.6 CyberSource Decision Manager APIREST API for the Decision Manager Service32.5 CyberSource Payer Authentication (3D Secure) APIImplements 3D Secure 2.x authentication to reduce fraud liability and enable frictionless payment experienc...32.5 AINumbers.co Fraud APIThe fraud API from AINumbers.co — 2 operation(s) for fraud.32.4 Device Swap APIIdentifies recent changes of the device associated with a mobile number to flag potential fraud and verify ...31.6 SIM Swap APIDetects recent SIM card changes for a given mobile number to help prevent account takeover and fraud.31.6 Consumer Sentinel NetworkConsumer Sentinel is the FTC's secure online database of consumer reports of fraud, identity theft, and oth...31.3 Cielo 3DS 2.2 Authentication APICielo 3DS 2.2 is an EMVCo-compliant cardholder authentication service exposed via the Braspag MPI endpoint....31.0 hCaptcha EnterprisehCaptcha Enterprise extends the core challenge with advanced bot detection, account defense (ATO and fake-a...30.4 Picker anti Fraud APIThe anti Fraud API from Picker — 2 operation(s) for anti fraud.30.1 Cuscal Card Controls APICMS REST API letting cardholders and back-office staff control and restrict card usage - locking and unlock...29.6 Acuant Ozone APIDigital identity trust API derived from Acuant's acquisition of Ozone from Mount Airy Group. Provides addit...29.5 TransUnion Global Developer PortalTransUnion's API products for credit reporting, identity verification, fraud prevention and consumer risk d...28.0 TransUnion TruValidate Device RiskDevice recognition and fraud signals, formerly iovation FraudForce. Mobile SDKs collect a device "blackbox"...28.0 Nivelo Scorer APINivelo's real-time ACH return-risk scoring API. A RESTful endpoint that accepts ACH transaction data as JSO...27.3 GrabDefence Risk Evaluation APIGrabDefence exposes Grab's internal fraud, abuse, and risk evaluation platform as an API for partners — cov...26.5

Emerging 33 Early or largely undocumented

Paysafe 3D Secure APIThe 3D Secure v2 API provides strong customer authentication (SCA) for card transactions in line with PSD2 ...26.0 Signifyd Account Protection APIScore and protect non-purchase customer journeys — Account Opening, Login, and Modification events — agains...25.0 Signifyd Decisions APIProgrammatically retrieve guarantee decisions, case details, and policy results for orders submitted to Sig...25.0 Signifyd Feedback APIReport observed user outcomes back to Signifyd to close the loop between real-time decisions and production...25.0 Signifyd Returns APISubmit return events for evaluation by Signifyd's Return Insights and Return Abuse Prevention models. Helps...25.0 Signifyd Sale (Checkout) APISubmit checkout and sale events to Signifyd's Commerce Protection Platform for real-time fraud and chargeba...25.0 Signifyd Transaction APISubmit finalized order and payment transaction details after authorization. Enables Signifyd to reconcile t...25.0 DataVisor dEdge Device Intelligence WebAPIDevice intelligence surface. The dEdge SDK is embedded in an iOS app, Android app or HTML5 web page, sends ...24.7 DataVisor Fraud and Risk Platform APIReal-time fraud and risk detection API surface. Customers stream user events and transactions to a DataViso...24.7 DataDome Account ProtectAccount Protect targets account takeover, fake account creation, and post-login abuse using behavioral, dev...24.4 BICS Fraud Prevention and Reachability APINetwork-signal services for fraud prevention and mobile identity - HLR and reachability lookup (operator, p...23.8 BICS Number Verification APIPhone number verification and mobile authentication for anti-fraud, KYC and onboarding - validating that a ...23.8 Jumio Risk Signals APIReturns enriched risk-signal data on a user (device, behavioural, network, and identity-graph signals) for ...23.8 Overhaul FraudWatch APICarrier and driver verification and risk-scoring service that lets shippers vet carriers before booking, re...23.5 Sardine Customer APISubmit customer profile and onboarding signals (KYC, KYB, document verification, sanctions/PEP screening, i...21.1 Sardine Device Intelligence APICapture device, network, and behavioral signals from web, iOS, and Android SDKs and resolve them to a Sardi...21.1 Sardine Issuing APIReal-time card authorization fraud scoring for card issuers. Returns an approve/decline/step-up recommendat...21.1 Sardine Transaction APISubmit payment, ACH, wire, card, and crypto transactions for real-time fraud scoring and AML transaction mo...21.1 SingVerify Device Location APIVerifies whether a mobile device is within an expected area or country at the time of a login or transactio...20.9 SingVerify Device Roaming APIReports whether a subscriber's device is currently roaming outside Singapore, used as a risk signal in frau...20.9 SingVerify Number Verify APINetwork-based verification that the mobile number a user declares is the number of the SIM the request is a...20.9 SingVerify Scam Sniffer APIDetects whether a user is on an active voice call at the moment they attempt a high-value transaction, a si...20.9 SingVerify SIM Swap APIReal-time signal indicating whether the SIM bound to a mobile number has been changed recently, so that a r...20.9 American Express Enhanced Authorization (EA)American Express Enhanced Authorization (EA) is a fraud prevention tool that helps protect cardholders and ...20.3 CARFAX VIN Scan Detail APIDelivers comprehensive VIN-level data in ten groupings including vehicle description, demographic informati...18.2 First Data Gateway (IPG)The First Data Gateway, marketed by Fiserv as the Internet Payment Gateway (IPG) and documented on the Fise...15.8 LexisNexis Risk SolutionsLexisNexis Risk Solutions offers fraud detection, identity verification, and risk orchestration capabilitie...14.9 LexisNexis ThreatMetrixThreatMetrix delivers digital identity intelligence and behavioral analytics for fraud prevention across us...14.9 Block SIMPartner API for blocking a SIM (e.g. lost-or-stolen) on the Vodafone network on behalf of an authenticated ...13.3 Call DivertIndicates whether call forwarding is currently active on the target number — a useful signal for fraud-dete...13.3 SIM Swap (CAMARA)CAMARA SIM Swap API that returns the timestamp of the most recent SIM change for a given MSISDN (latestSimC...13.3 TenureReturns how long the current subscriber has held the MSISDN — short tenure is a strong signal in fraud-scor...13.3 HUMAN Transaction Abuse DefenseTransaction Abuse Defense extends HUMAN's signals into checkout, payment, and high-value transaction flows ...13.0

Minimal 8 Almost no public developer surface

Home Network APIVerify whether a customer's phone is currently connected to EE's mobile network, supporting risk decisionin...10.7 PNC Account Verification Services APIAccount Verification Services API from PNC's developer portal for confirming the ownership and status of ba...10.7 SIM Swap Detection APIQuery when a mobile subscriber's SIM was last changed so relying parties can detect SIM-swap account-takeov...10.7 TIM Device LocationCAMARA Device Location verification API offered by TIM Brasil Open Gateway. Confirms whether a mobile devic...9.7 TIM IP to MSISDNGiven an IP address observed by a relying party, returns the TIM mobile number (MSISDN) currently associate...9.7 TIM IP to NumberGiven an IP address, returns the TIM fixed-line or mobile number associated with the session. Extends IP-to...9.7 TIM SIM SwapCAMARA-aligned API that returns the timestamp of the last SIM swap (or whether a swap occurred within a cal...9.7 Metromile Enterprise APIREST API platform for property and casualty insurance carriers enabling touchless claims automation, digita...9.6

Companies reaching this through an API (38)

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

66.5

log-scaled weighted occurrences

Breadth

3.8

spread across providers

Quality lift

31.3

mean composite of providers using it

Cohesion

17.3

strength of nearest seed neighbor

Where this tag sits

296 providers carry this tag directly, and 298 counting the 1 narrower tag below — 2 more to reach.

Account Takeover 18 providers

Where this tag comes from

Provider tag296

Api tag122

Openapi tag11

Openapi op tag23

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 265 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

265

of 296 in the catalog

Mean Kin Score

32.2

+8.1 vs catalog 24.1

Mean Agent Readiness

19.1

+5.0 vs catalog 14.1

Spread

0–93.5

median 29.6 · σ 20.2

How the 265 split by band

Exemplar 13Strong 31Developing 55Thin 50Emerging 67Minimal 49

Facet averages, against the whole catalog

Facet	This cohort	Catalog	Difference	Scored
Developer Ergonomics	35.2	24.5	+10.7	265
Contract Quality	27.9	18.6	+9.3	265
Operational Transparency	20.1	13.2	+6.9	265
Access Clarity	36.4	30	+6.4	265
Discoverability	64.2	59.1	+5.1	265
Contract Governance	13.6	9.7	+3.9	265

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)	16%	18%	-2
MCP server (first-party)	15%	16%	-1
Agent Skills	0%	0%	0
OAuth scopes	14%	13%	+1
Security	97%	99%	-2
Arazzo workflows	2%	1%	+1
Governance rules	45%	36%	+9

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

1 Telnyx 93.5
2 MandateShield 78.1
3 Telesign 77
4 Strivacity 73.5
5 Didit 71.9
6 Trulioo 71.1
7 AlphaLoops FMCSA Carrier Data API 69.2
8 Amazon Fraud Detector 68.6
9 Signicat 68.1
10 Mailboxlayer 67.8

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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.

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Fraud Prevention

Providers using this tag (296)

APIs with this tag (122)