OTP
Variants seen in the corpus:
OTPotp
Providers using this tag (16)
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Strong 4 Solid coverage with minor gaps
Developing 4 Usable, with meaningful gaps to close
Thin 3 Limited public surface area
Minimal 2 Almost no public developer surface
APIs with this tag (21)
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 →
Strong 6 Solid coverage with minor gaps
Swisscom Phone Number Validation APITwo-factor authentication API that starts an SMS token validation flow against an MSISDN and then verifies ...JuriSign APIDocumented, versioned REST API (OpenAPI 3.0.3, 46 operations across 8 tags) for eIDAS SES electronic signat...TempMailGrab REST APIVersioned v1 REST API for creating private disposable inboxes, reading parsed messages with extracted OTPs ...Stytch OTP APIThe OTP API from Stytch — 7 operation(s) for otp.MTN Group OTP APIThe OTP API from MTN Group — 2 operation(s) for otp.Route Mobile OTP APIAPIs for OTP generation and verification.
Developing 7 Usable, with meaningful gaps to close
Toqio OTP APIThe OTP API from Toqio — 1 operation(s) for otp.Fyno Verify APIOTP and TOTP-based verification API for authenticating users via SMS, email, or authenticator apps. Bundled...1Kosmos OTP APIThe OTP API from 1Kosmos — 3 operation(s) for otp.Truecaller Non-Truecaller User Verification APIServer-side validation for the drop-call / IM-OTP verification flow that covers users without the Truecalle...Telesign Voice APISend voice messages including OTPs, alerts, and notifications to phone numbers worldwide. Supports text-to-...Keynua APIREST API for creating contracts, sending them to signers over WhatsApp/SMS/email, running biometric identit...Plivo Verify APIThe Plivo Verify API delivers OTPs over SMS, voice, WhatsApp, or email and verifies user-supplied codes, su...
Thin 3 Limited public surface area
Authsignal Client APIBrowser / device-facing REST API for fully custom authentication UIs. Supports passkeys, authenticator apps...Riskified OTP APIInitiate a one-time password challenge as a step-up verification mechanism for high-risk login, password re...PocketBase Authentication APIAuthentication endpoints supporting password-based login, OAuth2 providers, one-time passwords, token refre...
Emerging 4 Early or largely undocumented
IYK APIThe IYK API provides primitives for building digi-physical experiences. Core endpoints manage chips (NFC ta...tyntec 2FA Authentication APIProgrammatic two-factor authentication and one-time passwords. Send an OTP to a recipient number (POST /otp...BICS Number Verification APIPhone number verification and mobile authentication for anti-fraud, KYC and onboarding - validating that a ...TranZak SMS APIREST API for sending marketing bulk SMS messages and OTP/verification codes. Supports up to 500 recipients ...
Minimal 1 Almost no public developer surface
Companies reaching this through an API (14)
These companies publish an API, specification or operation carrying “OTP” 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.
1Kosmos
Authsignal
Fyno
IYK
MTN Group
Plivo
PocketBase
Riskified
Stytch
Swisscom
Telesign
Toqio
TranZak
Truecaller
Score breakdown
Frequency
43.6
log-scaled weighted occurrences
Breadth
0.4
spread across providers
Quality lift
43.9
mean composite of providers using it
Cohesion
8.1
strength of nearest seed neighbor
Related tags
CPaaS 9 co-occurrences
Number Verification 5 co-occurrences
SMS 15 co-occurrences
WhatsApp 6 co-occurrences
Verification 7 co-occurrences
Identity Verification 8 co-occurrences
Voice 7 co-occurrences
Messaging 12 co-occurrences
Where this tag comes from
Api tag21
Provider tag16
Openapi tag4
Openapi op tag8
Work with this as data
Every tag here is available over the APIs.io API and to AI agents over MCP.