canonical · 2.3 capability resource

Message

Score 33.7 / 100 212 providers 225 APIs Search apis.io →
Variants seen in the corpus: MessageMessagesmessagemessages

Providers using this tag (211)

Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.

Exemplar 20 Complete, well-documented, and agent-ready
BrevoMarketingMarketing AutomationEmail MarketingTransactional Email29 APIs87.3Customer.ioBehavioral DataBroadcastsCampaignsCDP27 APIs87.3SalesforceFortune 500Artificial IntelligenceAnalyticsCloud294 APIs83.3HubSpotAnalyticsCommerceContentCRM93 APIs82.4MailchimpCampaignsEmail MarketingMarketing AutomationNewsletters120 APIs81.5RegalArtificial IntelligenceAI AgentsVoice AIContact Center10 APIs79.6SvixWebhookWebhooks As A ServiceWebhook DeliveryWebhook Sending21 APIs79.2ListrakEmail MarketingSMS MarketingMarketing AutomationCross-Channel56 APIs77.4NylasCalendarCommunicationsContactsEmail14 APIs76.2TwilioAuthenticationCommunicationsContact CenterEmail115 APIs73.4Vibes PlatformMobile MarketingMobile MessagingPush NotificationsSMS12 APIs72.6KnockNotificationMessagingInfrastructureWorkflows35 APIs71.9PostmarkEmailsMessagingTransactional EmailDeliverability47 APIs71.1MailosaurEmail TestingSMS TestingDeveloper ToolsQA Automation7 APIs71.0MiraklCompanyCommerceE-CommerceMarketplace26 APIs68.7AnthropicArtificial IntelligenceClaudeFoundation ModelsLarge Language Models24 APIs68.6ActiveCampaignMarketing AutomationEmail MarketingCRMSales Automation43 APIs67.28x8TelecommunicationsUnited StatesCPaaSUCaaS36 APIs67.1NovuNotificationMessagingIn-AppEmail19 APIs66.6Microsoft OutlookCalendarContactsEmailEnterprise4 APIs66.5
Strong 30 Solid coverage with minor gaps
GridspaceCompanyVoice AIConversational AIVoice Agents3 APIs65.3MailerSendEmailTransactional EmailSMTPMarketing8 APIs64.6PostscriptSMSMarketingMessagingE-Commerce8 APIs64.3BonitasoftCompanySoftware-as-a-ServiceBusiness Process ManagementProcess Automation1 API64.1Adobe Experience CloudAnalyticsCustomer ExperienceDigital MarketingPersonalization36 APIs63.4HootsuiteSocial-MediaSocial Media ManagementMarketingContent Scheduling5 APIs63.3VendastaCompanySoftware-as-a-ServiceMarketplaceSMB38 APIs63.3BoomiAI AgentsAutomationB2BData Integration20 APIs62.3SlackBotsChatCollaborationMessaging115 APIs62.3CloudflareAI GatewayAPI GatewayArtificial IntelligenceCDN87 APIs62.0KPNTelecommunicationsNetherlandsMobile Network OperatorBroadband38 APIs61.9WorkatoAgenticAPI ManagementAutomationB2B11 APIs61.3SendHubCompanySMSMessagingText Messaging6 APIs60.7MewsHospitalityHotelPMSProperty Management78 APIs60.4Unified.toIntegrationUnified-API140 APIs60.4LithiumCompanyMarTechCommunitySocial-Media100 APIs60.2HustleCompanyEnterpriseMessagingSMS10 APIs59.8MoveworksCompanyArtificial IntelligenceAgentic AIAI Assistant9 APIs58.8SimpleTextingSMSMMSMessagingMarketing12 APIs58.8MewsHospitalityHotelProperty ManagementPMS79 APIs58.7KaleyraCPaaSMessagingSMSWhatsApp6 APIs57.4Microsoft ExchangeCalendarCollaborationContactsEmail20 APIs57.2SinchCommunicationsMessagingSMSVoice35 APIs56.5InsforgeCompanyBackend-as-a-Serviceagent-nativeCloud Infrastructure11 APIs56.4MartianArtificial IntelligenceLLMModel RouterGateway3 APIs55.5BandwidthCommunicationsCPaaSVoiceMessaging18 APIs55.3ZavuCompanyMessagingSMSWhatsApp21 APIs55.2Abnormal AICompanySecurityEmail SecurityCybersecurity17 APIs55.0OpenPhoneCompanyCommunicationsVoiceSMS9 APIs55.0ClaudeArtificial IntelligenceChatbotsConversational AIGenerative AI9 APIs54.4
Developing 83 Usable, with meaningful gaps to close
IBM WebSphereApplication ServerCloud-NativeEnterprise JavaJ2EE35 APIs54.2OptusTelecommunicationsAustraliaMobile Network OperatorMessaging10 APIs54.0Google Cloud DataflowApache BeamBatch ProcessingBig DataData Processing8 APIs53.9SambaNova SystemsCompanyArtificial IntelligenceMachine-LearningLLM12 APIs53.8LeanplumMobile MarketingCustomer EngagementPush NotificationsMessaging8 APIs53.2VonageCommunicationsMessagingTelecommunicationsVideo Conferencing9 APIs53.2Microsoft TeamsChatCollaborationCommunicationsMicrosoft-36511 APIs52.9ReloadCompanyAI AgentsAgent OrchestrationTeam Chat6 APIs52.9VaultREReal-EstateAustraliaNew ZealandPropTech3 APIs52.8ZenZapCompanyAi MlMessagingTeam Communication8 APIs52.5Cloudflare QueuesMessagingMessage QueueServerlessWorkers4 APIs52.2Arthur OnlineReal-EstateUnited KingdomProperty ManagementPropTech16 APIs51.8NHS EnglandHealthcareUnited KingdomNational Health SystemFHIR10 APIs51.5SuprSendNotificationMulti-ChannelEmailSMS21 APIs51.3NimbleCRMSalesContact ManagementRelationship Management13 APIs51.2AT&T5GBroadbandCAMARAConnectivity28 APIs50.9QuoCompanyCommunicationsMessagingSMS9 APIs50.9AppmixerAgenticAutomationEmbedded iPaaSIntegration12 APIs50.4WhatsApp17 APIs49.9DiscordChatCommunicationsGamingMessaging29 APIs49.4AhaSendEmailTransactional EmailDeveloper ToolsSMTP11 APIs49.2ProlificCompanyAi MlHuman DataResearch18 APIs49.2Microsoft Windows 10DesktopOperating SystemUWPWin3277 APIs49.0LangdockCompanyArtificial IntelligenceEnterprise AILLM15 APIs48.7WebexCallingCollaborationCommunicationsEnterprise193 APIs48.2AndoCompanyBusiness ApplicationsMessagingTeam Collaboration8 APIs48.1BeeperCompanyConsumerMessagingChat7 APIs48.1Sendbird7 APIs48.0Anthropic ClaudeArtificial IntelligenceLarge Language ModelsLLMGenerative AI4 APIs47.9FrontAppCompanyCommunicationsCustomer ServiceShared Inbox1 API47.9QStashMessage QueueTask SchedulingServerlessHTTP Messaging7 APIs47.9MicrosoftFortune 10059 APIs47.8StepFunArtificial IntelligenceLLMMulti-ModalChat Completion12 APIs47.8PaytCompanyApplicative SaasAccounts ReceivableOrder-to-Cash20 APIs47.7HubfloClient PortalProfessional ServicesCRMInvoicing28 APIs47.6Salesforce Service CloudCase ManagementCRMCustomer ServiceHelp Desk18 APIs47.6RouterPlexLLMArtificial IntelligenceAI GatewayInference5 APIs47.2iContactEmail MarketingMarketing AutomationCampaignsContacts1 API46.9ZeebeBPMNCamundaCloud-NativeDistributed Systems9 APIs46.9DixaCustomer ServiceConversationalOmnichannelCX20 APIs46.5CharthopCompanyHRPeople AnalyticsHRIS87 APIs46.4QuadrillionCompanyArtificial IntelligenceAI AgentsResearch51 APIs45.6Amazon SQSCloudDistributed SystemsMessagingMicroservices4 APIs45.3GoogleAdvertisingCloudDevelopersGoogle125 APIs45.2BasecampCollaborationProject ManagementRESTSoftware-as-a-Service20 APIs45.0LettaArtificial IntelligenceAgentsStateful AgentsMemory41 APIs45.0Google ChatChatCollaborationGoogleGoogle Workspace7 APIs44.8Google FirebaseAnalyticsAuthenticationBackend-as-a-ServiceCloud Messaging5 APIs44.3RedditAdvertisingCommunitiesContentSocial-Media21 APIs44.3airbnb11 APIs44.1OutdoorsyCompanyTravelMarketplaceRentals62 APIs44.1PlivoCommunicationsCPaaSVoiceSMS24 APIs44.0AcquiaContentExperience21 APIs43.9MissiveTeam InboxCollaborationEmailMessaging7 APIs43.8PryonArtificial IntelligenceRetrieval Augmented GenerationEnterprise SearchKnowledge-Management24 APIs43.6AgentPhoneCompanyTelephonyPhone NumbersSMS13 APIs43.1iNaturalistBiodiversityNatureCitizen ScienceWildlife21 APIs43.0OpenAI APIsArtificial IntelligenceEmbeddingsImage-GenerationLanguage Models12 APIs43.0HipChatChatMessagingCollaborationTeam Communication2 APIs42.7FusionAuthAuthenticationAuthorizationIdentityCIAM37 APIs42.2StockTwitsCompanyFintechSocialStocks9 APIs42.2StreamChatMessagingActivity FeedsVideo14 APIs42.2AnythingCompanyAi MlApp BuilderLow-Code14 APIs42.0Safe (Gnosis Safe)MultisigSmart ContractEthereumWeb316 APIs41.9GleapCustomer FeedbackBug ReportingIn-App SupportFeature Requests33 APIs41.8Orion HealthHealthPublic APIs33 APIs41.8Azure Service BusEnterprise MessagingMessage BrokerMessagingPublish Subscribe2 APIs41.7Salesforce EinsteinArtificial IntelligenceComputer-VisionCRMMachine-Learning17 APIs41.7NHS DigitalNHSHealthFHIRUK23 APIs41.6Zoho CliqMessagingTeam CollaborationChatBots22 APIs41.2SignalEncryptionMessagingSecurityCryptography14 APIs41.0Respond.ioMessagingOmnichannelCustomer ConversationsWhatsApp6 APIs40.7ChatwootCustomer-SupportMessagingLive ChatOmnichannel33 APIs40.4Cognition LabsArtificial IntelligenceAI AgentAutonomous CodingSoftware Engineering9 APIs40.4Jack Henry & AssociatesFinancial-ServicesBankingCore BankingDigital Banking42 APIs40.4IntercomArtificial IntelligenceCustomer ServiceCustomer-SupportMessaging9 APIs39.8Sublime SecurityCompanySecurityEmail SecurityPhishing16 APIs39.7FrontCustomer-SupportEmailInboxCustomer Operations39 APIs39.6nexos.aiCompanyArtificial IntelligenceLLMAI Gateway16 APIs39.6Zoho MailEmailMailCollaborationMessaging4 APIs39.6RasayelCompanyWhatsAppMessagingBusiness Messaging7 APIs39.5TalkJSChatMessagingCommunicationsSDK6 APIs39.5RentberryReal-EstatePropTechRentalsRental Marketplace46 APIs39.3
Thin 68 Limited public surface area
RainbowCommunicationsCPaaSChatVoice7 APIs39.1SpredfastCompanySocial-MediaSocial Media ManagementMarketing9 APIs39.1CamundaBPMNBusiness Process ManagementProcess AutomationWorkflows10 APIs38.9PapercupsCustomer MessagingLive ChatOpen-SourceSupport7 APIs38.5ProlificResearchParticipant RecruitmentSurveysHuman Data10 APIs38.4CometChatChatMessagingVoiceVideo13 APIs38.0Beds24Vacation RentalHotelChannel ManagerProperty Management System8 APIs37.9FacebookFortune 500AdvertisingContent PublishingMessaging21 APIs37.6HospitableVacation RentalShort-Term RentalProperty ManagementAirbnb8 APIs37.6OwnerRezVacation RentalShort-Term RentalProperty ManagementHospitality23 APIs37.5TrengoCustomer EngagementOmnichannelShared InboxMessaging8 APIs37.2MailtrapEmailEmail DeliveryEmail SandboxEmail Testing3 APIs37.1PurplebricksReal-EstateUnited KingdomProperty ListingsOnline Estate Agency13 APIs36.9ThumbtackLocal ServicesMarketplaceHome ServicesLeads10 APIs36.1TelefonieCall RecordingCPaaSMessagingNumber Provisioning6 APIs36.0TextmagicSMSText MessagingMessagingCommunications11 APIs36.0GorgiasCustomer-SupportHelp DeskE-CommerceShopify14 APIs35.7Microsoft Office IntegrationMicrosoft-365Microsoft Office IntegrationOffice 3656 APIs35.7NeynarFarcasterSocialDecentralizedWeb339 APIs35.7BasetenArtificial IntelligenceMLInferenceDeployment3 APIs35.6PushPressFitnessGym ManagementMembership ManagementFitness Software13 APIs35.5TrieveSearchRAGVector SearchHybrid Search21 APIs35.5GrooveCustomer-SupportHelp DeskShared InboxKnowledge Base12 APIs35.2SmartRecruitersHuman ResourcesRecruitingTalent AcquisitionApplicant Tracking12 APIs35.1TelefonCall RecordingCommunicationsCPaaSGlobal Coverage7 APIs35.1UplistingVacation RentalShort-Term RentalChannel ManagerProperty Management9 APIs35.1TelefoonBelgiumCPaaSEU Data ResidencyEurope5 APIs35.0ReceeveCompanyDebt CollectionReceivables ManagementDebt Servicing14 APIs34.9CORCompanyAgency ManagementProject ManagementTime Tracking27 APIs34.8LorikeetArtificial IntelligenceCustomer-SupportAI AgentSupport Automation4 APIs34.8International Business MachinesArtificial IntelligenceCloudEnterpriseIBM22 APIs34.7SamsaraAsset TrackingConnected OperationsELDFleet Management90 APIs34.1MailgunEmailTransactional EmailSMTPEmail Validation8 APIs34.0Saxo BankInvestment BankingTradingEquitiesForex80 APIs34.0TelnyxCommunicationsCPaaSVoiceSMS168 APIs34.0LiteLLMGateways33 APIs33.7ZulipCollaborationMessagingTeam ChatWebhook17 APIs33.6FreshchatCustomer MessagingLive ChatCustomer-SupportConversational Engagement13 APIs33.5Fireworks AIArtificial IntelligenceLLMInferenceMulti-Modal10 APIs33.1osmAPIArtificial IntelligenceAnthropicGatewayLLM4 APIs33.1Microsoft YammerEnterprise SocialMicrosoftSocial NetworkingViva Engage10 APIs32.9WATIWhatsAppMessagingCustomer EngagementChatbots4 APIs32.9messagebird19 APIs32.7BotpressArtificial IntelligenceConversationalChatOpen-Source8 APIs32.3IXONIIoTIndustrial IoTMachine ConnectivityRemote Access359 APIs32.3SymphonyCollaborationCommunicationsFinancial-ServicesMessaging46 APIs32.3Apache ActiveMQAMQPApacheJavaJMS4 APIs31.8LayerZeroBlockchainCross-ChainOmnichainInteroperability5 APIs31.7freshworks44 APIs31.6Google Chat Integrations for WorkspaceGoogle WorkspaceTeam ChatMessagingCollaboration8 APIs31.4HiveProject ManagementTask ManagementTeam CollaborationProductivity13 APIs31.3Spire MaritimeVessel TrackingAISMaritimeSatellite AIS5 APIs31.2BotanalyticsCompanyConversational AnalyticsChatbotsVoice Assistants1 API31.1booking-com24 APIs30.3Apache RocketMQCloud-NativeMessagingMessage QueuePub-Sub4 APIs29.6TruVideoCompanyCommerceVideoMessaging11 APIs29.5KnockNotificationEmailSMSPush19 APIs29.2United TechnologiesAerospaceDefenseAviationManufacturing3 APIs29.1Flowdock (Discontinued)Team ChatTeam InboxCollaborationReal-Time Messaging15 APIs28.4UpworkFreelancingJobTalentMarketplace7 APIs28.2FINOSFinancial-ServicesFintechLinux FoundationOpen-Source34 APIs28.1ChatworkMessagingChatCollaborationProductivity9 APIs27.9SiliconFlowArtificial IntelligenceLLMInferenceOpen-Source11 APIs27.8ForithmusMedical ImagingRadiologyMachine-LearningFoundation Models25 APIs27.5EnvianceCompanyEnvironmentalComplianceEHS39 APIs27.4Booking HoldingsAccommodationsAirlinesCar RentalsHospitality9 APIs27.1Messaging APIAPI PatternMessagingTemplate1 API26.9MewsHospitalityHotelsPMSProperty Management75 APIs26.6
Emerging 10 Early or largely undocumented
CucumberAutomationBDDBehavior-Driven DevelopmentGherkin5 APIs25.5NoBuenoCompanyJobRecruitingHiring32 APIs23.1Gradient LabsArtificial IntelligenceCustomer-SupportAI AgentConversations5 APIs22.8PushwooshNotificationPushEmailSMS5 APIs22.2BotSocietyCompanyChatbotsConversational AIVoice Assistants4 APIs22.1QualiaTitle InsuranceEscrowReal-EstateClosing6 APIs20.2Cisco Collaboration Hybrid SolutionsCallingCollaborationHybrid CloudMeetings12 APIs19.3Amazon Web ServicesAmazonCloudNetworkIndex1804 APIs16.7OmnitracsFleet ManagementTelematicsELDHours of Service3 APIs14.7QuipCollaborationProductivityDocumentsSpreadsheets3 APIs13.5

APIs with this tag (224)

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 21 Complete, well-documented, and agent-ready
brevo Messages APISend and manage chat messages as an agent or automated bot within conversations.87.3Customer.io Messages APIRetrieve information about individual messages sent to customers.87.3Salesforce Messages APIThe Messages API from Salesforce — 1 operation(s) for messages.83.3HubSpot Messages APIOperations for sending, receiving, and managing messages within conversation threads.82.4Mailchimp Messages APIThe Messages API from Mailchimp — 13 operation(s) for messages.81.5Regal Messages APIThe Messages API from Regal — 1 operation(s) for messages.79.6Svix Message APIMessages are the webhook events being sent.79.2Listrak Message APIThe Message API from Listrak — 2 operation(s) for message.77.4Nylas Messages APIMessages. List, search, read, update and delete email messages. Send immediately, schedule a send and cance...76.2Twilio Messages APISend and manage SMS and MMS messages73.4Vibes Platform Messages APISend SMS and MMS messages.72.6Knock Messages APIThe Messages API from Knock — 24 operation(s) for messages.71.9Postmark Messages APIThe Messages API from Postmark — 11 operation(s) for messages.71.1Mailosaur Messages APIOperations for finding, retrieving, creating, forwarding, replying to, and deleting the email and SMS messa...71.0Mirakl Messages APIThe Messages API from Mirakl — 9 operation(s) for messages.68.7Anthropic Message Batches APISend a batch of Message creation requests at 50% off both input and output tokens. Batches can take up to 2...68.6Anthropic Messages APISend a structured list of input messages with text and/or image content, and the model will generate the ne...68.6ActiveCampaign Messages APIThe Messages API from ActiveCampaign — 2 operation(s) for messages.67.2Contact Center Chat Gateway8x8 Contact Center Chat Gateway API for bridging external chat channels into 8x8 Contact Center conversations.67.1Novu Messages APIA message in Novu represents a notification delivered to a recipient on a particular channel. Messages cont...66.6Microsoft Outlook Messages APIOperations on email messages in a user mailbox66.5
Strong 31 Solid coverage with minor gaps
Gridspace Messages APISend SMS messages and read inbound messages received on your Guava numbers.65.3MailerSend Messages APIThe Messages API from MailerSend — 2 operation(s) for messages.64.6Postscript Messages APISend promotional, transactional or conversational SMS and MMS to an existing subscriber, and read the resul...64.3Postscript Partner APIThe Postscript Partner API v2 enables partners and Shopify shops to manage SMS subscribers, read opt-in key...64.3Bonita Web REST APIThe Bonita Web REST API exposes every Bonita Runtime feature reachable over HTTP — BPM (processes, cases, t...64.1Adobe Experience Cloud Messages APIOperations for managing channel messages63.4Hootsuite REST APIThe Hootsuite platform REST API — 48 operations covering OAuth 2.0 authentication, the authenticated member...63.3Vendasta Social REST APISocial AI product API for connected social profiles and messages on a business location. Published as OpenA...63.3Boomi Messages APIEndpoints for producing messages to Boomi Event Streams topics via HTTP REST calls.62.3Slack Messages APIThe Messages API from Slack — 1 operation(s) for messages.62.3Cloudflare Messages APISend, pull, and acknowledge messages.62.0Vonage Messages API (via KPN)Encapsulates multiple APIs to interact with our various channels such as WhatsApp Business, SMS, MMS, Viber...61.9Workato Messages APIEndpoints for publishing messages to event topics and consuming messages from event topics.61.3SendHub Message APISend and manage messages.60.7Mews Messages APIThe Messages API from Mews — 2 operation(s) for messages.60.4Unified.to message APIThe message API from Unified.to — 2 operation(s) for message.60.4Lithium Messages APIThe Messages API from Lithium — 10 operation(s) for messages.60.2Hustle Messages APIThe Messages API from Hustle — 1 operation(s) for message delivery status.59.8Moveworks messages APIThe messages API from Moveworks — 3 operation(s) for messages.58.8SimpleTexting Messages APISend and retrieve one-to-one SMS / MMS messages.58.8Mews Messages APIThe Messages API from Mews — 2 operation(s) for messages.58.7Kaleyra Messages APISend SMS, WhatsApp, and RCS messages and read their status.57.4Microsoft Exchange Messages APIOperations for managing email messages57.2Sinch Messages APISend and retrieve messages across all supported channels using a normalized message format.56.5Insforge Messages APIInspect realtime message history and delivery stats.56.4Martian Messages APIThe Messages API from Martian — 1 operation(s) for messages.55.5Bandwidth Messages APISend and retrieve SMS and MMS messages. Supports single and group messaging, delivery receipts, and message...55.3Zavu Messages APIThe Messages API from Zavu — 4 operation(s) for messages.55.2Abnormal AI Messages APIAPI to manage message details55.0OpenPhone Messages APIOperations related to text messages55.0Claude Messages APICreate messages and count tokens54.4
Developing 85 Usable, with meaningful gaps to close
IBM WebSphere Messages APIMessage operations - send and receive54.2Optus SMS Suite SMS Gateway REST API v2High-volume asynchronous SMS API using UUID-based message tracking, mandatory delivery-receipt (DLR) callba...54.0Google Cloud Dataflow Messages APIOperations for retrieving job status messages and logs.53.9SambaNova Systems Messages APIThe Messages API from SambaNova Systems — 2 operation(s) for messages.53.8Leanplum APIThe complete Leanplum REST API as Leanplum itself publishes it — one OpenAPI 3.0.0 document (x-api-id "lean...53.2Vonage Messages APIMulti-channel messaging via SMS, WhatsApp, Messenger, Viber, MMS, RCS53.2Microsoft Teams Messages APIOperations for sending and receiving chat messages.52.9Reload messages APISend, read, and search channel messages.52.9VaultRE APIThe core VaultRE REST API - the open API a third-party developer integrates an agency website or applicatio...52.8VaultRE Integrator APIA distinct set of endpoints that operate at the integrator level rather than at an individual agency-accoun...52.8ZenZap Messages APIOperations for sending messages52.5Cloudflare Queues Messages APIOperations for sending, receiving, and acknowledging messages52.2Arthur Conversations APIThreaded conversations and messages between managers, tenants, owners and contractors, with attached assets...51.8Booking and Referral Standard (BaRS) - FHIR APISends booking and referral information between NHS service providers using the Booking and Referral Standar...51.5SuprSend Message APIThe Message API from SuprSend — 1 operation(s) for message.51.3Nimble Messages APIMessage drafts — list and create draft messages. 2 operation(s).51.2AT&T Messages APIThe Messages API from AT&T — 2 operation(s) for messages.50.9Quo Messages APIOperations related to text messages50.9Appmixer Messages APIUnprocessed message management50.4WhatsApp Messages APISend messages of all types to WhatsApp users49.9Discord Messages APIOperations on messages within channels49.4AhaSend Messages APISend and manage transactional messages49.2Prolific messages APIThe messages API from Prolific — 4 operation(s) for messages.49.2Microsoft Windows 10 Messages APIThe Messages API from Microsoft Windows 10 — 1 operation(s) for messages.49.0Langdock Messages APIThe Messages API from Langdock — 1 operation(s) for messages.48.7Webex Messages APIThe Messages API from Webex — 4 operation(s) for messages.48.2Ando Messages APIMessage and conversation message routes.48.1Beeper Messages APIMessages inside a Chat: list, search, send, retrieve, edit, delete, and react.48.1Sendbird Messages APIOperations for sending and managing messages.48.0Anthropic Claude Messages APICreate messages with Claude models.47.9Front Core APIThe Front Core API is a REST API over Front's shared-inbox platform. It exposes conversations, messages, dr...47.9QStash Messages APIPublish and manage messages47.9Microsoft Messages APISend and manage channel messages47.8StepFun Messages APIAnthropic Messages API-compatible endpoint (POST /v1/messages) that lets the Anthropic SDK and Claude-style...47.8Payt messages APIOperations about messages47.7Hubflo message APIThe message API from Hubflo — 1 operation(s) for message.47.6Salesforce Service Cloud Messages APIChat message operations47.6RouterPlex Messages APIThe Messages API from RouterPlex — 1 operation(s) for messages.47.2iContact REST APIREST API v2.2 for managing contacts, lists, segments, campaigns, messages, sends, and reporting inside the ...46.9Zeebe Messages APIThe Messages API from Zeebe — 1 operation(s) for messages.46.9Dixa Messages APIThe Messages API from Dixa — 2 operation(s) for messages.46.5Charthop message APIThe message API from Charthop — 7 operation(s) for message.46.4Quadrillion Messages APIThe Messages API from Quadrillion — 1 operation(s) for messages.45.6Amazon SQS Messages APIOperations for sending, receiving, and deleting messages in SQS queues45.3Google Messages APIOperations related to Messages45.2Basecamp Messages APIManage messages on message boards45.0Letta Messages APISend messages, list message history, search, and batch operations.45.0Google Chat Messages APIThe Messages API from Google Chat — 1 operation(s) for messages.44.8Google Firebase Messages APISend messages to devices and topics44.3Reddit Messages APIEndpoints for managing private messages, including inbox, sent, unread messages, composing, and message act...44.3airbnb Messages APIOperations for sending and retrieving guest and host messages within reservation threads.44.1Outdoorsy Messages APIThe messages API from Outdoorsy — 3 operation(s) for messages.44.1Plivo Message APISend and retrieve SMS, MMS, and WhatsApp messages.44.0Acquia Messages APIThe Messages API from Acquia — 2 operation(s) for messages.43.9Missive Messages APICreate messages in custom channels43.8Pryon Messages APIThe Messages API from Pryon — 3 operation(s) for messages.43.6AgentPhone messages APIThe messages API from AgentPhone — 2 operation(s) for messages.43.1iNaturalist Messages APICreate, fetch, delete43.0OpenAI APIs Messages APIManage messages within threads43.0HipChat REST API v2The HipChat REST API v2 was the primary developer surface for the team chat platform, exposing rooms, users...42.7FusionAuth Message APIThe Message API from FusionAuth — 3 operation(s) for message.42.2StockTwits Messages APIMessage endpoints for creating, viewing, liking, and managing individual messages (twits).42.2Stream Messages APISend, retrieve, update, delete, and search messages and replies.42.2Anything Messages APIThe Messages API from Anything — 1 operation(s) for messages.42.0Safe (Gnosis Safe) messages APIThe messages API from Safe (Gnosis Safe) — 3 operation(s) for messages.41.9Safe Messages APIEndpoints for off-chain message signing via Safe smart accounts. Allows creating signed messages for a Safe...41.9Gleap Messages APIThe Messages API from Gleap — 4 operation(s) for messages.41.8Orion Health Messages APIMessage search, inspection, and reprocessing41.8Azure Service Bus Messages APIThe Messages API from Azure Service Bus — 3 operation(s) for messages.41.7Salesforce Einstein Messages APISend and receive bot messages41.7NHS Digital Message APIThe Message API from NHS Digital — 1 operation(s) for message.41.6Zoho Cliq messages APIMessages Module41.2Signal Messages APIMessage sending and receiving endpoints for delivering encrypted messages between Signal users.41.0Respond.io Messages APISend messages to contacts and read message history.40.7Chatwoot Messages APIMessage management APIs40.4Cognition Labs Messages APISend and read messages within a running session.40.4Jack Henry & Associates Messages APITwo-way secure messaging with the institution.40.4Intercom Messages APISend outbound messages from Intercom to contacts.39.8Sublime Security Messages APIThe Messages API from Sublime Security — 19 operation(s) for messages.39.7Front Messages APIThe Messages API from Front — 9 operation(s) for messages.39.6nexos.ai Messages APIAnthropic-native Messages API for prompt-cache-preserving passthrough.39.6Zoho Mail Messages APISend, receive, search, and manage email messages and attachments39.6Rasayel Messages APIThe Messages API from Rasayel — 1 operation(s) for messages.39.5TalkJS Messages APISend, list, fetch, edit, delete messages, and manage reactions.39.5Rentberry Messages APIMessages39.3
Thin 77 Limited public surface area
Rainbow Messages APISend and receive chat messages39.1Spredfast Conversations API (v1)The original Spredfast Conversations API, still live alongside v2 on api.spredfast.com — 27 operations for ...39.1Camunda Messages APIThe Messages API from Camunda — 1 operation(s) for messages.38.9Papercups Messages APIIndividual messages within conversations.38.5Prolific Messages APICommunicate with participants.38.4CometChat Messages APISend, list, edit, and delete messages38.0Beds24 Messages APIGuest and channel messages attached to bookings.37.9Facebook Messages APIThe Messages API from Facebook — 2 operation(s) for messages.37.6Hospitable Messages APIGuest-host message threads per reservation.37.6OwnerRez Messages APIGuest messaging threads and outbound messages.37.5Trengo Messages APIList and send text and media messages on a ticket.37.2Mailtrap Messages APIInspect captured messages37.1Purplebricks Messaging APIThreaded messaging between customers, sellers and local property experts: message threads, individual messa...36.9Thumbtack Messages APIThe Messages API from Thumbtack — 2 operation(s) for messages.36.1Telefonie Messages APISend and receive SMS/MMS messages36.0Textmagic Messages APISend and manage outbound SMS messages.36.0Gorgias Messages APIThe Messages API from Gorgias — 1 operation(s) for messages.35.7Gorgias WebhooksOutbound webhook surface delivered through Gorgias HTTP Integrations. When configured triggers fire on a Go...35.7Microsoft Office Integration Messages APIThe Messages API from Microsoft Office Integration — 1 operation(s) for messages.35.7Neynar Message APIOperations related to messages.35.7Baseten Messages APIThe Messages API from Baseten — 1 operation(s) for messages.35.6PushPress Messages APITransactional email, SMS, push, and in-app notifications.35.5Trieve Message APIThe Message API from Trieve — 1 operation(s) for message.35.5Trieve Message APIMessages are turns within a topic; the Message API drives RAG completions, streaming responses, and citatio...35.5Groove GraphQL API v2GraphQL API exposing conversations, messages, agents, contacts, mailboxes, tags, and knowledge base data th...35.2Groove Messages APIThe Messages API from Groove — 2 operation(s) for messages.35.2Groove WebhooksGroove's webhook surface delivered through the legacy REST API webhook subscription endpoint. Customers reg...35.2SmartRecruiters Messages APIThe Messages API from SmartRecruiters — 1 operation(s) for messages.35.1Telefon Messages APISend and receive SMS and MMS messages35.1Uplisting Messages APIGuest messaging via the unified inbox (modeled).35.1Telefoon Messages APISend and receive SMS messages35.0Receeve Message APICommunication message in .eml format that was sent to Debtor.34.9COR Messages APIThe Messages API from COR — 2 operation(s) for messages.34.8Lorikeet Messages APIPost and list messages within a conversation.34.8International Business Machines Messages APISend messages to an assistant.34.7Samsara Messages APIThe Messages API from Samsara — 1 operation(s) for messages.34.1Mailgun Messages APIThe Messages API from Mailgun — 2 operation(s) for messages.34.0Saxo Bank Messages APIProvides end points for polling and subscribing to messages which should be displayed to the user. Only mes...34.0Telnyx Messages APIMessages34.0LiteLLM Anthropic Messages APIProvides Anthropic-compatible /v1/messages and /v1/messages/count_tokens endpoints for native Anthropic API...33.7LiteLLM Messages APIThe Messages API from LiteLLM — 2 operation(s) for messages.33.7Zulip messages APIThe messages API from Zulip — 16 operation(s) for messages.33.6Freshchat Messages APIThe Messages API from Freshchat — 1 operation(s) for messages.33.5Fireworks AI Messages APIThe Messages API from Fireworks AI — 1 operation(s) for messages.33.1osmAPI Messages APIThe Messages API from osmAPI — 1 operation(s) for messages.33.1Microsoft Yammer Messages APIThe Messages API from Microsoft Yammer — 12 operation(s) for messages.32.9WATI Messages APIRetrieve and send WhatsApp messages.32.9messagebird Messages APIOperations for sending and retrieving messages within conversations.32.7Botpress Messages APIThe Messages API from Botpress — 2 operation(s) for messages.32.3IXON Message APIThe Message API from IXON — 1 operation(s) for message.32.3Symphony Message APIThe Message API from Symphony — 4 operation(s) for message.32.3Apache ActiveMQ Messages APIOperations for producing and consuming messages from queues and topics.31.8LayerZero messages APIThe messages API from LayerZero — 7 operation(s) for messages.31.7freshworks Messages APISend and retrieve messages within conversations.31.6Google Chat APIREST API for sending and managing messages, spaces, members, reactions, attachments, custom emoji, user not...31.4Google Chat Integrations for Workspace Message APIThe Message API from Google Chat Integrations for Workspace — 1 operation(s) for message.31.4Google Chat Integrations for Workspace Messages APIThe Messages API from Google Chat Integrations for Workspace — 1 operation(s) for messages.31.4Hive Messages APIThe Messages API from Hive — 1 operation(s) for messages.31.3Spire Maritime Messages APIGraphQL query surface for decoded AIS messages (position and static/voyage reports) filtered by MMSI and ti...31.2Botanalytics Messages APIThe Messages API from Botanalytics — 1 operation(s) for messages.31.1booking-com Messages APIEndpoints for two-way post-booking communication between guests and properties, allowing you to send and re...30.3Apache RocketMQ Messages APIThe Messages API from Apache RocketMQ — 3 operation(s) for messages.29.6TruVideo Messages APIThe Messages API from TruVideo — 3 operation(s) for messages.29.5Knock Messages APIA message sent to a single recipient on a channel.29.2United Technologies Messages APIAviation message transmission and retrieval operations29.1Flowdock (Discontinued) Messages APIChat messages, comments, status, activity, discussion, and file events posted to a flow.28.4Upwork Messages APIRead and send messages within active contracts.28.2FINOS Message APIThe Message API from FINOS — 1 operation(s) for message.28.1FINOS Messages APIThe Messages API from FINOS — 7 operation(s) for messages.28.1Chatwork Messages APIThe Messages API from Chatwork — 4 operation(s) for messages.27.9SiliconFlow Cloud Platform APIOpenAI- and Anthropic-compatible inference covering chat completions, messages, embeddings, reranking, imag...27.8SiliconFlow Messages APIThe Messages API from SiliconFlow — 1 operation(s) for messages.27.8Forithmus messages APIThe messages API from Forithmus — 5 operation(s) for messages.27.5Enviance Message APIThe Message API from Enviance — 2 operation(s) for message.27.4Booking Holdings Messages APIProvides endpoints for two-way post-booking communication between guests and properties. Use these endpoints t27.1Messaging API Messages APIManaging, sending, and receiving of messages via SMS and other channels.26.9Mews Messages APIThe Messages API from Mews — 2 operation(s) for messages.26.6
Emerging 10 Early or largely undocumented
Cucumber MessagesProtocol-buffer / JSON Schema specification of the messages exchanged between Cucumber components (parsers,...25.5NoBueno messages APIThe messages API from NoBueno — 6 operation(s) for messages.23.1Gradient Labs Messages APIAdd inbound messages to a conversation.22.8Pushwoosh Messages APIThe Messages API from Pushwoosh — 4 operation(s) for messages.22.2BotSociety Messages APIManage messages within a conversation (legacy apisociety 2.0 API)22.1Qualia Messages APISend and receive messages tied to an order or transaction, powering client communication and status notific...20.2Cisco Collaboration Hybrid Solutions Messages APIThe Messages API from Cisco Collaboration Hybrid Solutions — 2 operation(s) for messages.19.3Amazon Web Services Messages APIThe Messages API from Amazon Web Services — 2 operation(s) for messages.16.7Omnitracs Event Subscription Service (ESS)A publish-subscribe integration service in which Omnitracs applications continually publish transactions (v...14.7Quip Automation APIREST API for programmatically managing Quip threads, documents, spreadsheets, messages, folders, and users....13.5

Score breakdown

Frequency
74.3
log-scaled weighted occurrences
Breadth
5.8
spread across providers
Quality lift
55.3
mean composite of providers using it
Cohesion
17.6
strength of nearest seed neighbor

Related tags

Messaging 88 co-occurrences Conversations 41 co-occurrences SMS 39 co-occurrences Contacts 44 co-occurrences Communications 34 co-occurrences Chat 37 co-occurrences Channels 24 co-occurrences Email 35 co-occurrences

Where this tag comes from

Api tag215
Openapi tag185
Openapi op tag672

Cohort brief

Auto-generated

The 211 providers in the APIs.io catalog tagged Message, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
211
of 212 on the roster
Mean Kin Score
45.4
+24.7 vs catalog 20.7
Mean Agent Readiness
28.7
+19.0 vs catalog 9.7
Spread
13.5–87.3
median 43.1 · σ 14.4
How the 211 split by band
Exemplar 20Strong 30Developing 83Thin 68Emerging 10Minimal 0
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Contract Quality 57 17.5 +39.5 211
Developer Ergonomics 42.9 17.9 +25 211
Access Clarity 42.7 22.3 +20.4 211
Operational Transparency 31.1 11.3 +19.8 211
Discoverability 73.4 60.4 +13 211
Contract Governance 17.7 6.4 +11.3 211

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
ArtifactThis cohortCatalogDifference
MCP server (any) 42% 16% +26
MCP server (first-party) 16% 7% +9
Agent Skills 0% 0% 0
OAuth scopes 26% 9% +17
Security 100% 88% +12
Arazzo workflows 14% 2% +12
Governance rules 49% 13% +36

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. 1 Brevo 87.3
  2. 2 Customer.io 87.3
  3. 3 Salesforce 83.3
  4. 4 HubSpot 82.4
  5. 5 Mailchimp 81.5
  6. 6 Regal 79.6
  7. 7 Svix 79.2
  8. 8 Listrak 77.4
  9. 9 Nylas 76.2
  10. 10 Twilio 73.4
Top by Agent Readiness
  1. 1 Insforge 59.9
  2. 2 Mirakl 59.7
  3. 3 Knock 58.6
  4. 4 HubSpot 54.4
  5. 5 Nylas 52.4
  6. 6 Salesforce 52.2
  7. 7 Customer.io 50.4
  8. 8 MailerSend 50.2
  9. 9 Svix 49.9
  10. 10 Brevo 49.6
This roster declares 212 members; 211 resolve to a provider in the catalog and 211 carry a score (100%). The figures above describe the scored members only.Generated from the catalog build of 25 August 2026, across 26891 providers, using the same computation served by the APIs.io cohort API. Briefs are published for rosters of 5 or more scored providers; below that a distribution is not meaningful.

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/message"
All tags 
curl "https://apis.io/api/v1/tags?limit=25"
As a scored cohort 
curl "https://apis.io/api/v1/cohorts/tag/message"
The distribution (Pro) 
curl "https://apis.io/api/v1/cohorts/tag/message/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

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