diff --git a/captcha/build.gradle.kts b/captcha/build.gradle.kts
new file mode 100644
index 0000000..e812cbb
--- /dev/null
+++ b/captcha/build.gradle.kts
@@ -0,0 +1,15 @@
+plugins {
+    id("kotlin")
+    id("kotlin-spring")
+}
+
+dependencies {
+    implementation(project(":common"))
+    implementation(project(":common-spring-web"))
+
+    implementation(project(":logger-spring"))
+
+    implementation("org.springframework.boot:spring-boot-starter-web")
+    implementation("org.springframework.boot:spring-boot-starter-webflux")
+    implementation("org.springframework.boot:spring-boot-starter-aop")
+}
diff --git a/captcha/src/main/kotlin/ru/touchin/captcha/annotations/Captcha.kt b/captcha/src/main/kotlin/ru/touchin/captcha/annotations/Captcha.kt
new file mode 100644
index 0000000..5804221
--- /dev/null
+++ b/captcha/src/main/kotlin/ru/touchin/captcha/annotations/Captcha.kt
@@ -0,0 +1,9 @@
+package ru.touchin.captcha.annotations
+
+import ru.touchin.captcha.dto.enums.CaptchaScore
+
+@Target(AnnotationTarget.FUNCTION)
+annotation class Captcha(
+    val action: String,
+    val minScore: CaptchaScore = CaptchaScore.AVERAGE
+)
diff --git a/captcha/src/main/kotlin/ru/touchin/captcha/aspects/CaptchaSiteVerifyAspect.kt b/captcha/src/main/kotlin/ru/touchin/captcha/aspects/CaptchaSiteVerifyAspect.kt
new file mode 100644
index 0000000..9c4ebe7
--- /dev/null
+++ b/captcha/src/main/kotlin/ru/touchin/captcha/aspects/CaptchaSiteVerifyAspect.kt
@@ -0,0 +1,38 @@
+package ru.touchin.captcha.aspects
+
+import org.aspectj.lang.annotation.Aspect
+import org.aspectj.lang.annotation.Before
+import org.springframework.stereotype.Component
+import org.springframework.web.context.request.RequestContextHolder
+import org.springframework.web.context.request.ServletRequestAttributes
+import ru.touchin.captcha.annotations.Captcha
+import ru.touchin.captcha.exceptions.CaptchaResponseMissingException
+import ru.touchin.captcha.services.CaptchaService
+import java.lang.IllegalStateException
+
+@Aspect
+@Component
+class CaptchaSiteVerifyAspect(private val captchaService: CaptchaService) {
+
+    @Throws(Throwable::class)
+    @Before("@annotation(captcha)")
+    fun captchaSiteVerify(captcha: Captcha) {
+        val currentRequestAttributes = RequestContextHolder.currentRequestAttributes()
+            as? ServletRequestAttributes
+            ?: throw IllegalStateException("unable to get current request attributes")
+
+        val captchaResponse = currentRequestAttributes.request.getHeader(CAPTCHA_HEADER_NAME)
+            ?: throw CaptchaResponseMissingException()
+
+        captchaService.verify(captchaResponse)
+            .validateAction(captcha.action)
+            .validateScore(captcha.minScore.value)
+    }
+
+    companion object {
+
+        private const val CAPTCHA_HEADER_NAME = "X-Captcha-Response"
+
+    }
+
+}
diff --git a/captcha/src/main/kotlin/ru/touchin/captcha/dto/CaptchaVerificationResult.kt b/captcha/src/main/kotlin/ru/touchin/captcha/dto/CaptchaVerificationResult.kt
new file mode 100644
index 0000000..2778a91
--- /dev/null
+++ b/captcha/src/main/kotlin/ru/touchin/captcha/dto/CaptchaVerificationResult.kt
@@ -0,0 +1,24 @@
+package ru.touchin.captcha.dto
+
+import ru.touchin.captcha.exceptions.CaptchaActionMismatchException
+import ru.touchin.captcha.exceptions.CaptchaScoreBelowMinimumException
+
+data class CaptchaVerificationResult(val score: Double, val action: String) {
+
+    fun validateScore(minScore: Double): CaptchaVerificationResult {
+        if (score < minScore) {
+            throw CaptchaScoreBelowMinimumException(score)
+        }
+
+        return this
+    }
+
+    fun validateAction(actionToValidate: String): CaptchaVerificationResult {
+        if (action != actionToValidate) {
+            throw CaptchaActionMismatchException(actionToValidate)
+        }
+
+        return this
+    }
+
+}
diff --git a/captcha/src/main/kotlin/ru/touchin/captcha/dto/enums/CaptchaScore.kt b/captcha/src/main/kotlin/ru/touchin/captcha/dto/enums/CaptchaScore.kt
new file mode 100644
index 0000000..d584c57
--- /dev/null
+++ b/captcha/src/main/kotlin/ru/touchin/captcha/dto/enums/CaptchaScore.kt
@@ -0,0 +1,9 @@
+package ru.touchin.captcha.dto.enums
+
+enum class CaptchaScore(val value: Double) {
+
+    WEAK(0.2),
+    AVERAGE(0.5),
+    STRONG(0.8)
+
+}
diff --git a/captcha/src/main/kotlin/ru/touchin/captcha/dto/response/CaptchaSiteVerifyResponse.kt b/captcha/src/main/kotlin/ru/touchin/captcha/dto/response/CaptchaSiteVerifyResponse.kt
new file mode 100644
index 0000000..8a756e8
--- /dev/null
+++ b/captcha/src/main/kotlin/ru/touchin/captcha/dto/response/CaptchaSiteVerifyResponse.kt
@@ -0,0 +1,12 @@
+package ru.touchin.captcha.dto.response
+
+import com.fasterxml.jackson.annotation.JsonProperty
+import java.time.ZonedDateTime
+
+data class CaptchaSiteVerifyResponse(
+    val score: Double,
+    val action: String,
+    val success: Boolean,
+    @JsonProperty("challenge_ts")
+    val challengeTs: ZonedDateTime
+)
diff --git a/captcha/src/main/kotlin/ru/touchin/captcha/exceptions/CaptchaActionMismatchException.kt b/captcha/src/main/kotlin/ru/touchin/captcha/exceptions/CaptchaActionMismatchException.kt
new file mode 100644
index 0000000..0730b0b
--- /dev/null
+++ b/captcha/src/main/kotlin/ru/touchin/captcha/exceptions/CaptchaActionMismatchException.kt
@@ -0,0 +1,7 @@
+package ru.touchin.captcha.exceptions
+
+import ru.touchin.common.exceptions.CommonException
+
+class CaptchaActionMismatchException(
+    action: String
+) : CommonException("invalid captcha action $action")
diff --git a/captcha/src/main/kotlin/ru/touchin/captcha/exceptions/CaptchaResponseMissingException.kt b/captcha/src/main/kotlin/ru/touchin/captcha/exceptions/CaptchaResponseMissingException.kt
new file mode 100644
index 0000000..e871d60
--- /dev/null
+++ b/captcha/src/main/kotlin/ru/touchin/captcha/exceptions/CaptchaResponseMissingException.kt
@@ -0,0 +1,5 @@
+package ru.touchin.captcha.exceptions
+
+import ru.touchin.common.exceptions.CommonException
+
+class CaptchaResponseMissingException : CommonException("missing captcha response header")
diff --git a/captcha/src/main/kotlin/ru/touchin/captcha/exceptions/CaptchaScoreBelowMinimumException.kt b/captcha/src/main/kotlin/ru/touchin/captcha/exceptions/CaptchaScoreBelowMinimumException.kt
new file mode 100644
index 0000000..240043f
--- /dev/null
+++ b/captcha/src/main/kotlin/ru/touchin/captcha/exceptions/CaptchaScoreBelowMinimumException.kt
@@ -0,0 +1,7 @@
+package ru.touchin.captcha.exceptions
+
+import ru.touchin.common.exceptions.CommonException
+
+class CaptchaScoreBelowMinimumException(
+    score: Double,
+) : CommonException("captcha score below minimum $score")
diff --git a/captcha/src/main/kotlin/ru/touchin/captcha/exceptions/CaptchaSiteVerifyFailureException.kt b/captcha/src/main/kotlin/ru/touchin/captcha/exceptions/CaptchaSiteVerifyFailureException.kt
new file mode 100644
index 0000000..a4cc0db
--- /dev/null
+++ b/captcha/src/main/kotlin/ru/touchin/captcha/exceptions/CaptchaSiteVerifyFailureException.kt
@@ -0,0 +1,7 @@
+package ru.touchin.captcha.exceptions
+
+import ru.touchin.common.exceptions.CommonException
+
+class CaptchaSiteVerifyFailureException(
+    description: String?
+) : CommonException(description)
diff --git a/captcha/src/main/kotlin/ru/touchin/captcha/exceptions/CaptchaUnknownActionException.kt b/captcha/src/main/kotlin/ru/touchin/captcha/exceptions/CaptchaUnknownActionException.kt
new file mode 100644
index 0000000..efa43e4
--- /dev/null
+++ b/captcha/src/main/kotlin/ru/touchin/captcha/exceptions/CaptchaUnknownActionException.kt
@@ -0,0 +1,7 @@
+package ru.touchin.captcha.exceptions
+
+import ru.touchin.common.exceptions.CommonException
+
+class CaptchaUnknownActionException(
+    action: String
+) : CommonException("unknown captcha action $action")
diff --git a/captcha/src/main/kotlin/ru/touchin/captcha/properties/CaptchaProperties.kt b/captcha/src/main/kotlin/ru/touchin/captcha/properties/CaptchaProperties.kt
new file mode 100644
index 0000000..4f5e4a2
--- /dev/null
+++ b/captcha/src/main/kotlin/ru/touchin/captcha/properties/CaptchaProperties.kt
@@ -0,0 +1,13 @@
+package ru.touchin.captcha.properties
+
+import org.springframework.boot.context.properties.ConfigurationProperties
+import org.springframework.boot.context.properties.ConstructorBinding
+import java.net.URI
+
+@ConstructorBinding
+@ConfigurationProperties(prefix = "captcha")
+data class CaptchaProperties(
+    val uri: URI,
+    val secret: String,
+    val actions: List<String>
+)
diff --git a/captcha/src/main/kotlin/ru/touchin/captcha/services/CaptchaService.kt b/captcha/src/main/kotlin/ru/touchin/captcha/services/CaptchaService.kt
new file mode 100644
index 0000000..14cff7d
--- /dev/null
+++ b/captcha/src/main/kotlin/ru/touchin/captcha/services/CaptchaService.kt
@@ -0,0 +1,9 @@
+package ru.touchin.captcha.services
+
+import ru.touchin.captcha.dto.CaptchaVerificationResult
+
+interface CaptchaService {
+
+    fun verify(response: String): CaptchaVerificationResult
+
+}
diff --git a/captcha/src/main/kotlin/ru/touchin/captcha/services/impl/CaptchaServiceImpl.kt b/captcha/src/main/kotlin/ru/touchin/captcha/services/impl/CaptchaServiceImpl.kt
new file mode 100644
index 0000000..ca35883
--- /dev/null
+++ b/captcha/src/main/kotlin/ru/touchin/captcha/services/impl/CaptchaServiceImpl.kt
@@ -0,0 +1,33 @@
+package ru.touchin.captcha.services.impl
+
+import org.springframework.stereotype.Service
+import ru.touchin.captcha.dto.CaptchaVerificationResult
+import ru.touchin.captcha.exceptions.CaptchaUnknownActionException
+import ru.touchin.captcha.properties.CaptchaProperties
+import ru.touchin.captcha.services.CaptchaService
+import ru.touchin.captcha.webclients.CaptchaWebClient
+import ru.touchin.logger.spring.annotations.AutoLogging
+import ru.touchin.logger.spring.annotations.LogValue
+
+@Service
+class CaptchaServiceImpl(
+    private val captchaWebClient: CaptchaWebClient,
+    private val captchaProperties: CaptchaProperties,
+) : CaptchaService {
+
+    @LogValue
+    @AutoLogging(tags = ["CAPTCHA", "CAPTCHA_VERIFICATION"])
+    override fun verify(response: String): CaptchaVerificationResult {
+        val siteVerifyResponse = captchaWebClient.siteVerify(response)
+
+        if (siteVerifyResponse.action !in captchaProperties.actions) {
+            throw CaptchaUnknownActionException(siteVerifyResponse.action)
+        }
+
+        return CaptchaVerificationResult(
+            score = siteVerifyResponse.score,
+            action = siteVerifyResponse.action,
+        )
+    }
+
+}
diff --git a/captcha/src/main/kotlin/ru/touchin/captcha/webclients/CaptchaWebClient.kt b/captcha/src/main/kotlin/ru/touchin/captcha/webclients/CaptchaWebClient.kt
new file mode 100644
index 0000000..df512e2
--- /dev/null
+++ b/captcha/src/main/kotlin/ru/touchin/captcha/webclients/CaptchaWebClient.kt
@@ -0,0 +1,55 @@
+package ru.touchin.captcha.webclients
+
+import org.springframework.http.HttpMethod
+import org.springframework.http.MediaType
+import org.springframework.stereotype.Component
+import org.springframework.web.reactive.function.client.WebClient
+import ru.touchin.captcha.properties.CaptchaProperties
+import ru.touchin.captcha.dto.response.CaptchaSiteVerifyResponse
+import ru.touchin.captcha.exceptions.CaptchaSiteVerifyFailureException
+import ru.touchin.common.spring.web.webclient.BaseLogWebClient
+import ru.touchin.common.spring.web.webclient.dto.RequestLogData
+import ru.touchin.common.spring.web.webclient.logger.WebClientLogger
+
+private const val SITE_VERIFY_PATH = "/recaptcha/api/siteverify"
+
+@Component
+class CaptchaWebClient(
+    webClientLogger: WebClientLogger,
+    webClientBuilder: WebClient.Builder,
+    private val captchaProperties: CaptchaProperties,
+) : BaseLogWebClient(webClientLogger, webClientBuilder) {
+
+    override fun getWebClient(): WebClient {
+        return getWebClientBuilder(captchaProperties.uri.toString()).build()
+    }
+
+    fun siteVerify(response: String): CaptchaSiteVerifyResponse {
+        return getWebClient().post()
+            .uri {
+                it.path(SITE_VERIFY_PATH)
+                it.queryParam("response", response)
+                it.queryParam("secret", captchaProperties.secret)
+
+                it.build()
+            }
+            .accept(MediaType.APPLICATION_JSON)
+            .exchange(
+                clazz = CaptchaSiteVerifyResponse::class.java,
+                requestLogData = RequestLogData(
+                    uri = SITE_VERIFY_PATH,
+                    logTags = listOf("CAPTCHA_SITEVERIFY"),
+                    method = HttpMethod.POST,
+                )
+            )
+            .block()!!
+            .also(this::validateSuccess)
+    }
+
+    private fun validateSuccess(captchaSiteVerifyResponse: CaptchaSiteVerifyResponse) {
+        if (!captchaSiteVerifyResponse.success) {
+            throw CaptchaSiteVerifyFailureException("Captcha siteverify request did not succeed")
+        }
+    }
+
+}
diff --git a/settings.gradle.kts b/settings.gradle.kts
index 9cbb3c2..96ead46 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -31,6 +31,7 @@ include("common-measure")
 include("common-measure-spring")
 include("common-geo")
 include("common-geo-spatial4j-spring")
+include("captcha")
 include("logger")
 include("logger-spring")
 include("logger-spring-web")