Contacts
Variants seen in the corpus:
Contactscontacts
Providers using this tag (308)
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Exemplar 32 Complete, well-documented, and agent-ready
BrevoSalesforce Marketing CloudSalesforceHubSpotZoomInfoSendGridNylasSendPulseMapp Marketing CloudGetResponseTwilioLevLoopsVesselLightfieldUserGemsPlunkMicrosoft Dynamics 365 SalesOmnisendOntraportSeamless.AICvent Event CloudlemlistDun & BradstreetCommon RoomMailmodoAskNicelyActiveCampaign8x8Oracle SiebelSimon DataMicrosoft Outlook
Strong 58 Solid coverage with minor gaps
KeapSAP EmarsysConstant ContactWeaveSilverpopCordialFactsetSpruce HealthBenchmark EmailClickFunnelsApollo.ioSendlaneAvalaraSmartleadDotdigitalInfusionsoft (Keap)VendastaInflection.ioKartraErxesXiaoman (OKKI)Apollo API DocumentationSoldo Software and ServicesCisco UmbrellaGetAcceptCurrencycloudNutshellEmailOctopusZendesk SellKiteworksCoreLogic (Cotality)AlphaLoops FMCSA Carrier Data APIFilevineZeptoCrescendo LabThe Mobile First CompanyCloudTalkSimpleTextingKnakDocusignMicrosoft GraphCoperniqZendeskVBOUTSalesflareMicrosoft ExchangeSinchSupaglueApideckPodiumCrowd.devZavuMicrosoft Power AppsOpenPhonePinch PaymentsOracle EloquaMicrosoft Office 365Solvimon
Developing 104 Usable, with meaningful gaps to close
NationBuilderLone Wolf TechnologiesQGendaServiceTitanPaidAgile CRMAmazon Ground StationVaultRELawmaticsVoPayCatchpointN3XTRittenBeazleyMixmaxSoldoHR PartnerManyChatbexioTPG TelecomNimbleTripleseatQuoResendAffinityAscendSolarWindsGojiberry AIHatchFolkTidioWeChatTrustLayerCatchpoint SystemsHelp ScoutFlickrBeeperFrontAppMicrosoftPaytVoomaSalesforce Service CloudGoogle WorkspaceAmazon ConnectAptlyMicrosoft OfficeiContactLoopsStackOneZoho InventoryClioPax8NationGraphMastercardGoogle PeopleCventGoogle People APIOracle Fusion Cloud ApplicationsGooglePandaDocBoldSignCCP GamesilertMonacoWrikeCognismSegMetricsFixtureBirdReonicMissiveParaşütRightslineCopperKajabiActionstepDiasporaShop-WareAgentPhoneMicrosoft Dynamics 365RembergMyCaseSwoogoVSCOTrutoCatnipSmokeballEverbridgeChatfuelPropertyMeProton.aiSagePropertywareRespond.ioEVE OnlineChatwootSpaceshipCommusoftChatbaseIntercomFrontZoho MailRasayelUnstoppable Domains
Thin 82 Limited public surface area
Rackspace TechnologyRainbowPylonReclaim.aiJAGGAERMailjetsevdeskSMSAPIDropboxZohoFormbricksQuadernoService FusionezyVetFleetbaselexofficeUptime.comSleekFlowFleetioTrengoCvent RegistrationdotloopLeverMessenteMicrosoft DynamicsTextmagicJoblogicGrowthZoneGrooveWhippyCORJustCallApolloFreeAgentWaste ManagementWazoCvent PlatformEncompassWildApricotSkySlopeWMDistruSamsaraZoho BooksTermiiCapsule CRMBigChangeWATIAbstract APImessagebirdFreshsalesWealthboxSurveyMonkeyApex27NodePingAircallfreshdeskfreshworksengageSPARKPrintavoZuoraMicrosoft SuiteRoutableDialpadInsightlyDriftAttioMicrosoft Office PackApollo.ioDealerSocketXero AccountingGrapes FinanceEmbatZoho InvoiceGetroGoDaddyAcceloAlchemerChatworkClear BooksGivebutterMYOB
Emerging 24 Early or largely undocumented
APIs with this tag (327)
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 47 Complete, well-documented, and agent-ready
brevo Contacts APICreate, retrieve, update, and delete individual contacts.Contacts APIREST API for creating, reading, updating, and deleting contacts in Marketing Cloud.Salesforce Marketing Cloud Contacts APICreate, retrieve, update, and delete contacts in Marketing Cloud. Contacts represent individuals who intera...Salesforce Contacts APIOperations for listing, retrieving, and deleting Marketing Cloud contact records.HubSpot Contacts APIOperations for managing contact recordsZoomInfo Data APISearch and enrich ZoomInfo company, contact, intent, scoop and news records on the current GTM API, plus th...SendGrid Contacts APITwilio SendGrid Marketing Campaigns Contacts APINylas APIThe Nylas v3 REST API provides programmatic access to email, calendar, contacts, meeting notetaking, schedu...Nylas Contacts APIContacts. Read, create, update and delete a grant's contacts and contact groups.SendPulse Facebook Messenger Chatbot APIFacebook Messenger chatbots — bots, subscribers, variables, flows and campaigns, with persistent menus and ...SendPulse Instagram Chatbot APIInstagram chatbots — bots, subscribers, variables, flows and campaigns, including comment-triggered flows a...SendPulse LiveChat APIChatbots embedded in the SendPulse live chat website widget — bots, subscribers, variables, flows and campa...SendPulse SMS APIMobile messaging: phone-book management, SMS campaign orchestration and delivery reporting.SendPulse Telegram Chatbot APITelegram chatbots — bots, subscribers, variables, flows, campaigns, chats, inline keyboards and custom comm...SendPulse TikTok Chatbot APITikTok chatbots — direct-message automation and comment-reply workflows for TikTok Business accounts.SendPulse Viber Chatbot APIViber chatbots — bots, subscribers, variables, flows and campaigns with rich media, buttons and carousels.SendPulse WhatsApp Chatbot APIWhatsApp Business chatbots — bots, subscribers, variables, flows, campaigns, chats and pre-approved templat...Mapp Engage APIThe Mapp Engage REST API (REST 2.0, incremental version v19) exchanges data between external systems and Ma...GetResponse API v3The complete GetResponse API v3 — a JSON REST API of 220 operations across 141 paths and 42 product areas, ...GetResponse Contacts APIAPI documentation for contacts and their properties (e.g., tags, custom fields) The Contacts area of the Ge...Twilio Contacts APIManage marketing contactsLev Contacts APIThe Contacts API from Lev — 5 operation(s) for contacts.Loops Contacts APICreate, update, find and delete contacts, and manage suppression status. 6 operation(s) in the Loops REST A...Vessel CRM Unified APIThe Vessel CRM Unified API (v2) normalizes CRM objects across Salesforce, HubSpot, Zoho, Pipedrive, Close, ...Vessel Engagement API (v1, legacy)The first-generation Vessel Sales Engagement API, published under /engagement/* on api.vessel.land. Covers ...Lightfield Contacts APIThe Contacts API from Lightfield — 3 operation(s) for contacts.UserGems Contacts APIAdd and remove contacts UserGems should track for job changes.Plunk APIPlunk's own published OpenAPI 3.1.0, served at https://docs.useplunk.com/openapi.json and declaring https:/...Plunk Contacts APIManage contacts and their subscription state.Microsoft Dynamics 365 Sales Contacts APIContact (person) recordsOmnisend Contacts APIThe Contacts API from Omnisend — 7 operation(s) for contacts. Version 2026-03-15, harvested from Omnisend's...Ontraport REST APIRESTful API providing CRUD access to contacts, transactions, tags, sequences, forms, landing pages, and eco...Seamless.AI Public APIThe Seamless.AI Public API v1 — nine operations covering contact and company search, asynchronous enrichmen...Cvent Event Cloud Contacts APIContact/address bookCvent Platform REST API (Event Cloud)RESTful API for managing events, contacts, registrations, attendees, sessions, speakers, exhibitors, survey...lemlist Contacts APICRM-side contacts, contact lists, list membership and exports.D&B Direct+ Search APIThe Search surface of D&B Direct+ lets applications find businesses, principals, and related entities using...Common Room Contacts APIThe Contacts API from Common Room — 6 operation(s) for contacts.Mailmodo Contacts APIAdd, remove, archive, unsubscribe, resubscribe, and look up contactsAskNicely Contacts APIImport, look up, deactivate and privacy-delete contacts.ActiveCampaign Contacts APIThe Contacts API from ActiveCampaign — 28 operation(s) for contacts.ActiveCampaign Segment Match One APIThe Segment Match One API from ActiveCampaign — 2 operation(s) that check whether a single contact matches ...ActiveCampaign Segment Matching APIThe Segment Matching API from ActiveCampaign — 8 operation(s) for asynchronous match-all and match-some seg...ActiveCampaign Segments APIThe Segments API from ActiveCampaign — 8 operation(s) for creating, retrieving, updating and deleting segme...Contacts API8x8 Contacts API for managing contacts and contact groups used as recipients across the Connect messaging a...Oracle Siebel Contacts APIOperations on Contact business objects representing individual people associated with accounts and organiza...Simon Data Audience APIThe Simon Audience API returns a single Simon Data contact profile at request time so marketers can persona...
Strong 62 Solid coverage with minor gaps
Keap Contacts APIKeap Contact API — 27 operations across 16 paths on the Keap REST v2 contract, read from Keap's own publish...Keap REST HooksKeap REST Hooks webhook surface. Subscribers register a `hookUrl` and `eventKey` via the v1 REST API (`POST...SAP Emarsys Contact and Email Data APIIn this batch you may find endpoints related to contact and email data. Published by SAP Emarsys as a Swagg...SAP Emarsys Contact Sources APIIn this batch you may find endpoints related to contact sources. Published by SAP Emarsys as a Swagger 2.0 ...SAP Emarsys Contacts APIIn this batch you may find endpoints related to contacts. Published by SAP Emarsys as a Swagger 2.0 documen...Constant Contact Contacts APIEndpoints and methods to get, create, delete, and update one or more contacts.Weave Contacts APIPatient/customer contacts and contact info.Silverpop Contacts APIContact (recipient) list managementCordial Contacts APIThe contacts API from Cordial — 17 operation(s) for contacts.Factset Contacts APIThe Contacts API from Factset — 8 operation(s) for contacts.Spruce Health Contacts APIContacts — the patients and other parties in a Spruce organization: list, search, create, retrieve, update ...Benchmark Email APIThe current Benchmark Email REST API on the benchmarkemail.io platform. Manages contacts, contact structure...ClickFunnels APIThe ClickFunnels 2.0 REST API — 418 operations across 230 paths and 102 resource tags, covering the whole p...Apollo.io Contacts APIWorkspace CRM contacts — create, update, search, stages and ownership. 10 operation(s) from the published A...Sendlane APIREST API for managing contacts, lists, campaigns, automations, custom fields, sender profiles, tags, and cu...Avalara Contacts APIManage company contactsSmartlead Leads APIEndpoints to add leads to a campaign in bulk, fetch leads, update lead status (interested, replied, unsubsc...Dotdigital v2 APIThe legacy v2 REST framework, still the only home for many capabilities — email and SMS campaigns, programs...Dotdigital v3 APIThe current v3 REST framework, designed around unified contacts. Per-service paths (/contacts/v3, /insightD...Keap REST API v2The default Keap REST API: 237 paths and 399 operations covering contacts, companies, tags, opportunities a...Vendasta CRM API (gRPC gateway)The CRM surface exposed through the gRPC reverse-proxy gateway: CRMService, CRMAssociationService, CRMCompa...Vendasta CRM REST APIThe CRM REST API for contacts, companies, opportunities, associations and custom objects, exposed as generi...Inflection.io Contacts APIThe Contacts API from Inflection.io — 6 operation(s) for contacts.Kartra APIKartra's inbound developer API. One endpoint, POST only, form-encoded, with the operation selected by `acti...Erxes GraphQL APIGraphQL Federation API powering the erxes XOS platform. An Apollo Router gateway federates one subgraph per...OKKI Go Contacts APIThe Contacts API from OKKI Go (go.okki.ai) — 1 retired operation (POST /api/v1/contacts/search returns 410 ...Apollo API ContactsCreate, update, and search the people your team saves in Apollo. Harvested from the Apollo-published OpenAP...Soldo Software and Services Contacts APIThe Contacts API from Soldo Software and Services — 2 operation(s) for contacts.Cisco Umbrella Service Providers Console APICisco Umbrella Service Providers Console API — 15 operation(s) published by Cisco under the Cloud Security ...GetAccept Contacts APIEverything related to contactsCurrencycloud Contacts APICreate, search and manage the list of users that have access in your Currencycloud account or associated su...Nutshell Contacts (People) APIPeople you do business with (shown as People in the Nutshell UI): create, read, update, delete, undelete, l...Nutshell REST APINutshell's primary REST API — 87 paths and 112 operations across 24 resource families (accounts, contacts, ...Zendesk Sell (Sales CRM) APIOAuth 2.0-authenticated REST API for managing leads, contacts, deals, accounts, notes, tasks, calls, source...Zendesk Sell Contacts APIIndividual people and organizations.Kiteworks contacts APIThe contacts API from Kiteworks — 2 operation(s) for contacts.CoreLogic (Cotality) Contacts APICRM contact records (name, address, phone, email).AlphaLoops FMCSA Carrier Data API Contacts APIThe Contacts API from AlphaLoops FMCSA Carrier Data API — 2 operation(s) for contacts.Filevine Contacts APIManage the global Filevine contact list and project-scoped contact attachments. Contacts represent clients,...Zepto APIZepto's core account-to-account payments API — move money over the New Payments Platform (NPP), BECS Direct...Crescendo Lab Contacts APIAddress book with NCC-consent tracking.The Mobile First Company Contacts APISearch and retrieve contact information with sorting and pagination. Includes engagement level tracking.CloudTalk Contacts APIAll data you can get about your contacts.SimpleTexting Contacts APICreate, read, update, and delete individual contacts.Knak Contacts APICreate, retrieve and list contacts in Knak Send.Docusign Contacts APIThe Contacts resource provides methods that allow you to manage contacts.Coperniq contacts APIThe contacts API from Coperniq — 2 operation(s) for contacts.Zendesk Sell Contacts APIThe Zendesk Sell Contacts API provides a simple interface to manage your contacts. A contact represents an ...Salesflare Contacts APIThe Contacts API from Salesflare — 2 operation(s) for contacts.Microsoft Exchange Contacts APIOperations for managing personal contactsSinch Contacts APIManage contacts and their channel identities. Contacts group together underlying connected channel recipien...Supaglue Contacts APIThe `Contact` Common Object represents a "contact" in CRMs.Apideck Contacts APIThe Contact resource represents individuals, including details such as name, contact information, associate...Podium APIREST API for managing customer communications including messaging, reviews, payments, webchat, contacts, au...Crowd.dev Contacts APISecurity contacts for a package — includes contact PII (e.g. reporter emails). The contract gates these beh...Zavu Contacts APIThe Contacts API from Zavu — 8 operation(s) for contacts.Microsoft Power Apps Contacts APIOperations on the contact entity set. A contact represents a person with whom a business unit has a relatio...OpenPhone Contacts APIOperations related to contactsPinch Contacts APIManage contact records for the authenticated merchant — create/update, retrieve a single contact, list cont...Oracle Eloqua Contacts APIManage contact records and dataOutlook Contacts APIAccess to Outlook personal contacts for managing contact information, creating contact folders, and organiz...Solvimon contacts APIThe contacts API from Solvimon — 2 operation(s) for contacts.
Developing 109 Usable, with meaningful gaps to close
NationBuilder Contacts APIContacts are logged interactions between people in your nation. More information about contacts and the fie...Lone Wolf Transact APIProgrammatic access to Lone Wolf's transaction management platform across the full transaction lifecycle — ...Lone Wolf TransactionDesk Partner APIPartner API for the TransactionDesk edition of Lone Wolf Transactions, covering transaction summaries, docu...QGenda Contacts APIThe Contacts API from QGenda — 3 operation(s) for contacts.ServiceTitan Contacts APICustomer contact methods (phone, email)Paid contacts APIThe contacts API from Paid — 5 operation(s) for contacts.Agile CRM Contacts APIThe Contacts API from Agile CRM — 18 operation(s) for contacts.Agile CRM REST APIHTTPS-only REST API for managing contacts, companies, deals, campaigns, tasks, notes, and tickets in Agile ...Amazon Ground Station Contacts APIThe Contacts API from Amazon Ground Station — 1 operation(s) for contacts.VaultRE APIThe core VaultRE REST API - the open API a third-party developer integrates an agency website or applicatio...VaultRE Integrator APIA distinct set of endpoints that operate at the integrator level rather than at an individual agency-accoun...Lawmatics OAuth APIRESTful OAuth API for managing leads, matters, contacts, intake forms, pipelines, and automated client foll...VoPay Contact APIVoPay's Contact API — 15 documented operation(s) across 15 path(s) on VoPay's API-first embedded finance pl...Catchpoint Contacts APIThe Contacts API from Catchpoint — 3 operation(s) for contacts.N3XT Contacts APIThe Contacts API from N3XT — 2 operation(s) for contacts.Ritten External APIThe Ritten External API is the public REST contract for Ritten integrating partners. It covers patients (cr...Beazley Broker and Insured Marketing Data v2Marketing details for Beazley's partner organisations — broker and insured organisations, contacts and micr...Mixmax Contacts APIMixmax Contacts (people you've emailed) — deprecated resource groupSoldo Contacts APIThe Contacts API from Soldo — 2 operation(s) for contacts.HR Partner Contacts APIList employee contact details (phone, email, emergency).ManyChat Subscriber APILook up, search, create, update, tag and set custom field values on subscribers. 15 operations. A subscribe...bexio Contacts APIThe Contacts API from bexio — 2 operation(s) for contacts.TPG Telecom Messaging Hub Contacts APIContacts Management API for the Vodafone Business Messaging Hub, providing CRUD over contacts, lists and cu...Nimble Contacts APIContact records — the Nimble platform root object. Create, read, update and delete person and company conta...Nimble Contacts Fields APIUser-definable contact field schema — fields, choice option lists, field groups and tabs, plus primary-valu...Nimble Contacts Pipelines APIContact pipelines — the lead-progression surface for contacts, distinct from deal pipelines. 8 operation(s).Nimble REST APIThe Nimble CRM REST API — 89 operations across contacts, contact custom fields, contact and deal pipelines,...Tripleseat Contacts APICreate and associate contacts with accounts.Quo Contacts APIOperations related to contactsResend Contacts APICreate and manage Contacts through the Resend API.Affinity API V1The legacy Affinity V1 API provides comprehensive read and write access to core CRM data including persons,...Ascend Contacts APIRepresents the contacts that may be associated with an Insured account.SolarWinds Contacts APIManage alert contactsGojiberry AI Contacts APIThe Contacts API from Gojiberry AI — 5 operation(s) for contacts.Hatch contacts APIThe contacts API from Hatch — 1 operation(s) for contacts.Tidio Contacts APIManage contacts (website visitors identified by name, email, or phone)WeChat Work (WeCom) APIServer API for Enterprise WeChat / WeCom — Tencent's enterprise collaboration suite. All calls are HTTPS/JS...TrustLayer contacts APIThe contacts API from TrustLayer — 4 operation(s) for contacts.Catchpoint Systems Contacts APIThe Contacts API from Catchpoint Systems — 3 operation(s) for contacts.Help Scout Customers APIThe Customers API from Help Scout — 2 operation(s) for customers.Flickr Contacts APICalling user's contacts and recent contact activityBeeper Contacts APIPer-account address book and network lookup. The same person can appear under multiple Accounts.Front Core APIThe Front Core API is a REST API over Front's shared-inbox platform. It exposes conversations, messages, dr...Microsoft Contacts APIManage contactsPayt contacts APIOperations about contactsVooma Contacts APIThe Contacts API from Vooma — 2 operation(s) for contacts.Salesforce Service Cloud Contacts APIOperations for managing contact recordsPeople APIRead and manage the authenticated user contacts and profiles, and search the directory.Amazon Connect Contacts APIOperations for managing contacts and contact interactionsAptly Contacts APIThe Contacts API from Aptly — 5 operation(s) for contacts.Outlook Mail APIAPI for accessing and managing email, calendar, contacts, and tasks in Outlook.iContact REST APIREST API v2.2 for managing contacts, lists, segments, campaigns, messages, sends, and reporting inside the ...Loops Contacts APIManage contacts in your audienceStackOne Contacts APIThe Contacts API from StackOne — 2 operation(s) for contacts.StackOne Unified CRM APIStackOne Unified CRM API provides a standardized interface for managing customer contacts, accounts, and op...Zoho Inventory contacts APIContacts ModuleClio Contacts APIAll clients, prospective clients, companies, and external co-counsels can be viewed as Contacts under the C...Pax8 Contacts APIContacts represent the people who should be provided visibility into events such as provisioningNationGraph Contacts APIThe Contacts API from NationGraph — 2 operation(s) for contacts.Mastercard Business Payment ControlsBusiness Payment Controls is an application programming interface (API) based solution that simplifies busi...Cvent Contacts APIContact/address bookCvent REST APIThe unified Cvent Platform REST API providing programmatic access to events, contacts, registrations, atten...Cvent SOAP API (Legacy)The Cvent SOAP API is the original legacy API for pushing and pulling data between Cvent and internal syste...Oracle Fusion Cloud Applications Contacts APIManage contact records associated with accountsGoogle People APIThe Google People API provides access to information about profiles and contacts, allowing applications to ...PandaDoc Contacts APIOperations for managing the PandaDoc contacts directory, including creating, reading, updating, and deletin...BoldSign Contacts APIThe Contacts API from BoldSign — 5 operation(s) for contacts.CCP Games Contacts APIThe Contacts API from CCP Games — 6 operation(s) for contacts.ilert Contacts APIThe Contacts API from ilert — 4 operation(s) for contacts.Monaco Contacts APIThe Contacts API from Monaco — 3 operation(s) for contacts.Wrike Contacts APIUsers and user groups in Wrike accountsCognism Enrichment APIThe Cognism API — Search, Enrich, Redeem, Entitlement, Filter and Compliance endpoints for B2B contact and ...SegMetrics Import APIThe v1 Import API lets a customer push their own data into a SegMetrics integration — contacts (with UTM at...Fixture Contacts APICreate, read, update, and delete person records.Bird Customer Data APISync customer data from multiple sources in real time to build a 360-degree customer view. Manage contacts,...Reonic Contacts APIExternal people you interact with, such as customers or leads. Not to be confused with [**Users**](#tag/use...Missive Contacts APIManage contacts and contact dataParaşüt Contacts APIThe Contacts API from Paraşüt — 4 operation(s) for contacts.Rightsline Contacts APIContact and company managementKajabi Contacts APIThe Contacts API from Kajabi — 4 operation(s) for contacts.Diaspora Contacts APIThe Contacts API from Diaspora — 2 operation(s) for contacts.Shop-Ware Contacts APIThe Contacts API from Shop-Ware — 2 operation(s) for contacts.AgentPhone contacts APIThe contacts API from AgentPhone — 3 operation(s) for contacts.Microsoft Dynamics 365 Contacts APIPerson with whom a business unit has a relationship, such as a customer, supplier, or colleague.Remberg contacts APIThe contacts API from Remberg — 2 operation(s) for contacts.MyCase Contacts APIPeople and client relationships associated with cases.Swoogo Contacts APIOrganization-level CRM contacts and contact fields.VSCO Contacts APIThe Contacts API from VSCO — 2 operation(s) for contacts.Truto Contacts APIContact records representing individuals at companiesChatfuel Contacts APIBulk-create WhatsApp contacts inside a Chatfuel automation. POST a list of up to 1,000 E.164 phone numbers ...Smokeball Contacts APIThe Contacts API from Smokeball — 6 operation(s) for contacts.Everbridge Contacts APIThe Contacts API from Everbridge — 3 operation(s) for contacts.Everbridge Digital Apps APIThe Everbridge Digital Apps API provides integration capabilities for mobile, desktop, and web applications...Chatfuel Contacts APIThe only documented Chatfuel API operation as of 2026-08-13. POST https://panel.chatfuel.com/api/contacts/{...PropertyMe Contacts APIRead the contact records in a connected PropertyMe portfolio — owners, tenants, suppliers and the agency co...Proton.ai Contacts APIThe Contacts API from Proton.ai — 3 operation(s) for contacts.Sage Contacts APICustomer and supplier contact managementPropertyware Contacts APIResources providing access to contacts.Respond.io Contacts APICreate, read, update, merge, list, and delete contacts.EVE Online Contacts APIThe Contacts API from EVE Online — 13 operation(s) for contacts.Chatwoot Client APIThe Client API is designed for building custom messaging interfaces for end users. Authenticates using inbo...Chatwoot Contacts APIContact management APIsSpaceship Contacts APIThe Contacts API from Spaceship — 2 operation(s) for contacts.Commusoft Contacts APIManage contacts linked to customers or suppliersChatbase Contacts APIManage contacts and custom attributes for a chatbot.Intercom Contacts APIManage users and leads in your Intercom workspace.Front Contacts APIThe Contacts API from Front — 6 operation(s) for contacts.Rasayel Contacts APIThe Contacts API from Rasayel — 5 operation(s) for contacts.Unstoppable Domains contacts APICreate and manage ICANN-required contacts for domain registration. Contacts represent individuals or organi...
Thin 83 Limited public surface area
Rackspace Technology Contacts APICustomer contact operations.Rainbow Contacts APIManage and search contactsPylon Contacts APIIndividual contacts (end customers).Reclaim.ai contacts APIThe contacts API from Reclaim.ai — 7 operation(s) for contacts.JAGGAER Contacts APIEvent contact managementMailjet Contacts APIManage contacts and propertiesSMSAPI Contacts APIThe Contacts API from SMSAPI — 4 operation(s) for contacts.Dropbox Contacts APIThe Contacts API from Dropbox — 2 operation(s) for contacts.Zoho CRMThe Zoho CRM API provides REST endpoints and client libraries for Java, PHP, Python, and Node.js, allowing ...Formbricks Contacts APIManage contacts and contact attribute keys.Quaderno Contacts APICustomers and vendors.Service Fusion Contacts APIIndividual contacts and service locations on a customer account.ezyVet Contacts APIContacts (clients / pet owners) and their details. (Confirmed CRUD.)Fleetbase Contacts APICustomer and facilitator contacts.lexoffice Contacts APICustomers and vendors.Uptime.com Contacts APIManage contact groups used for alert notifications.SleekFlow Contacts APICreate, read, search, update, and delete contacts.Fleetio Contacts APIThe Contacts API from Fleetio — 2 operation(s) for contacts.Trengo Contacts APIManage contacts and contact profiles.Cvent Registration Contacts APIContact/address bookCvent Registration REST APIThe Cvent Registration REST API is the registration surface of the unified Cvent Platform REST API. It allo...dotloop Contacts APIThe authenticated user's contacts (address book).Lever Contacts APIThe Contacts API from Lever — 1 operation(s) for contacts.Messente Contacts APIManage contacts in the Messente Phonebook.Microsoft Dynamics Contacts APIThe Contacts API from Microsoft Dynamics — 2 operation(s) for contacts.Textmagic Contacts APIManage contacts in the address book.Joblogic Contacts APIContacts attached to customers, sites, suppliers, and subcontractors.GrowthZone Contacts APIIndividuals (persons) and organizations, and their related data.Groove GraphQL API v2GraphQL API exposing conversations, messages, agents, contacts, mailboxes, tags, and knowledge base data th...Whippy Contacts APIManage contacts and communication preferences.COR Contacts APIThe Contacts API from COR — 3 operation(s) for contacts.JustCall Contacts APICreate and manage contacts in the JustCall directory.Apollo Contacts APIThe Contacts API from Apollo — 3 operation(s) for contacts.FreeAgent Contacts APIThe Contacts API from FreeAgent — 2 operation(s) for contacts.Waste Management Contacts APIManage billing and service contacts.Wazo Directory & Contacts API (wazo-dird)Directory lookup, reverse lookup and personal-contact service. Aggregates multiple directory backends (CSV,...Cvent Platform Contacts APIContact/address bookCvent Platform REST APIThe Cvent Platform REST API is the unified RESTful interface across the Event Cloud product line, providing...Encompass Contacts APIBorrower (consumer) and business contacts (modeled).WildApricot Contacts APIContact/member managementSkySlope Contacts APIThe Contacts API from SkySlope — 4 operation(s) for contacts.WM Contacts APIBilling and service contacts on an account.Distru Contacts APIThe Contacts API from Distru — 2 operation(s) for contacts.Samsara Contacts APIThe Contacts API from Samsara — 2 operation(s) for contacts.Zoho Books Contacts APIThe Contacts API from Zoho Books — 4 operation(s) for contacts.Termii Contacts APIManage phonebooks and the contacts within them.Capsule CRM API v2REST API for managing Capsule parties (contacts and organisations), opportunities, projects (cases), tasks,...BigChange Contacts APIThe Contacts API from BigChange — 2 operation(s) for contacts.WATI Contacts APIManage WhatsApp contacts in the WATI workspace.messagebird Contacts APIOperations for managing individual contacts.Freshsales Contacts APIThe Contacts API from Freshsales — 7 operation(s) for contacts.Freshsales CRM APIREST API for managing contacts, sales accounts, deals, tasks, appointments, notes, and CPQ products in Fres...Wealthbox Contacts APIThe Contacts API from Wealthbox — 2 operation(s) for contacts.SurveyMonkey Contacts APIThe Contacts API from SurveyMonkey — 3 operation(s) for contacts.Apex27 CRM APIThe Apex27 CRM API is the vendor's REST interface over the estate agency CRM, covering contacts, leads, lis...NodePing Contacts APIThe Contacts API from NodePing — 1 operation(s) for contacts.Aircall Contacts APIThe Contacts API from Aircall — 2 operation(s) for contacts.freshdesk Contacts APIManage contacts (end users) who submit support tickets.freshworks Contacts APIManage customer contacts including creation, updates, merging, and deactivation.engageSPARK Contacts APIThe Contacts API from engageSPARK — 2 operation(s) for contacts.Printavo Customers and Contacts APIGraphQL surface for customers (companies) and their contacts. Query single or plural customers and contacts...Zuora Contacts APIA contact defines the customer who holds an account or who is otherwise a person to contact about an accoun...Outlook Mail APIAccess to Outlook mail, calendar, contacts, and tasks via Microsoft Graph.Routable Contacts APIContacts associated with companies.Dialpad Contacts APIThe Contacts API from Dialpad — 2 operation(s) for contacts.Insightly Contacts APIThe Contacts API from Insightly — 3 operation(s) for contacts.Insightly REST API v3.1REST API for managing contacts, organizations, leads, opportunities, projects, tasks, events, products, pri...Drift Contacts API[https://devdocs.drift.com/docs/contact-model](https://devdocs.drift.com/docs/contact-model)Outlook Mail APIAPI for accessing and managing email messages, calendars, and contacts.Apollo.io Contacts APIManage contacts saved in your Apollo account.DealerSocket Customers APIInbound customer integration surface. The Customer Update integration modifies customer records in DealerSo...Xero Accounting Contacts APIThe Contacts API from Xero Accounting — 1 operation(s) for contacts.Grapes Finance Contacts APIBeneficiary management for third-party payoutsEmbat Contacts API`Contact` represents a client or supplier your company transacts with. `customId` is the unique identifier ...Zoho Invoice Contacts APIThe Contacts API from Zoho Invoice — 3 operation(s) for contacts.Getro Network API v2Read-oriented JSON REST API exposing a Getro network's companies, jobs and contacts, plus shared reference ...GoDaddy Contacts APIThe Contacts API from GoDaddy — 1 operation(s) for contacts.Accelo Contacts APIThe Contacts API from Accelo — 2 operation(s) for contacts.Alchemer REST APIRESTful API v5 for managing surveys, responses, contacts, campaigns, and account resources within the Alche...Chatwork Contacts APIThe Contacts API from Chatwork — 1 operation(s) for contacts.Clear Books REST APIRESTful API for integrating with Clear Books accounting software to manage invoices, payments, contacts, ba...Givebutter Contacts APIThe Contacts API from Givebutter — 2 operation(s) for contacts.MYOB Business APIREST-based cloud API for MYOB AccountRight, MYOB Essentials, and MYOB Business. Provides endpoints for mana...
Emerging 23 Early or largely undocumented
Jones Lang LaSalle Contacts APIManage contacts including vendors and tenants.DNSimple Contacts APIThe Contacts API from DNSimple — 1 operation(s) for contacts.SmartSimple SmartConnect Users APIGet, list, and update the people (applicants, reviewers, contacts, and internal staff) in a SmartSimple ins...Zoho Desk Contacts APIThe Contacts API from Zoho Desk — 2 operation(s) for contacts.Meow Contacts APIManage contacts for crypto and USDC transfers.Bizzabo Public APIRESTful API for managing B2B events including conferences, speakers, ticketing, attendee registration, cont...Zeffy Contacts APIAn organization's donors and supporters.Rentec Direct Open APIThe Rentec Direct Open API v3 provides RESTful access to property management data including properties, ten...Dolibarr REST APIREST API for the Dolibarr ERP/CRM platform providing full CRUD operations on business objects including con...Applied Epic Contacts APICentralize contact data for clients, prospects, carriers, and vendors, with filtering by classification, em...Qualia Contacts and Parties APIPull contact and party data for the files on an account - the people and organizations attached to a closin...Orange Logic Users and Contacts APIManage user and contact accounts, group assignments, permissions, and organizational hierarchies. Handled t...graph8 build APIOne REST API across the revenue surface — contacts, companies, campaigns and events — plus SDKs, a CLI and ...Joomla Web Services APIThe built-in Joomla Web Services API provides RESTful JSON endpoints for managing articles, categories, con...Amazon Web Services Contacts APIThe Contacts API from Amazon Web Services — 3 operation(s) for contacts.Buildium Tenants APIManages tenant records, contact information, and tenant-level communications inside Buildium.Intermedia Address Book APIThe Intermedia Address Book API aggregates user contacts from multiple sources into a unified directory acc...Office 365 APIAPIs for Office 365 services including Outlook, OneDrive, and SharePoint.Outlook Mail APIAccess and manage email, calendar, and contacts in Outlook.FranConnect CRM APICRM module (path segment "cm"). Read and write contacts and relationship/communication records that support...EZLynx Applicants and Contacts APICreate and update applicants, contacts, prospects, and opportunities in the EZLynx management system and CR...Pico APIThe Pico API let developers build custom workflows and integrations on the Pico creator platform — includin...LEAP Matters & Contacts APIModeled matter and contact/client management surface that third-party Marketplace apps integrate against - ...
Minimal 3 Almost no public developer surface
Onafriq Contacts APIContacts API for adding and retrieving customer (payer / payee) records used across Payins, Payouts, and re...ResWare Contacts APIModeled logical service area for the people and organizations attached to a file - buyers, sellers, lenders...Personify Wild Apricot APIRESTful API for the Wild Apricot small-association product, secured with OAuth 2.0 against base https://api...
Score breakdown
Frequency
79.5
log-scaled weighted occurrences
Breadth
8.5
spread across providers
Quality lift
55.2
mean composite of providers using it
Cohesion
15.9
strength of nearest seed neighbor
Related tags
CRM 87 co-occurrences
Task 62 co-occurrences
Campaigns 49 co-occurrences
Marketing Automation 42 co-occurrences
Email 52 co-occurrences
Message 44 co-occurrences
SMS 42 co-occurrences
Notes 33 co-occurrences
Where this tag comes from
Api tag316
Provider tag55
Openapi tag199
Openapi op tag1070
Cohort brief
Auto-generatedThe 308 providers in the APIs.io catalog tagged Contacts, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.
Providers
308
of 309 on the roster
Mean Kin Score
45.2
+24.5 vs catalog 20.7
Mean Agent Readiness
28.1
+18.4 vs catalog 9.7
Spread
0.1–87.3
median 44.8 · σ 16.3
How the 308 split by band
Exemplar 32Strong 58Developing 104Thin 82Emerging 24Minimal 8
Facet averages, against the whole catalog
| Facet | This cohort | Catalog | Difference | Scored |
|---|---|---|---|---|
| Contract Quality | 52.3 | 17.5 | +34.8 | 308 |
| Access Clarity | 47.8 | 22.3 | +25.5 | 308 |
| Developer Ergonomics | 41.6 | 17.9 | +23.7 | 308 |
| Operational Transparency | 33 | 11.3 | +21.7 | 308 |
| Discoverability | 74.7 | 60.4 | +14.3 | 308 |
| Contract Governance | 15.5 | 6.4 | +9.1 | 308 |
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) | 43% | 16% | +27 |
| MCP server (first-party) | 22% | 7% | +15 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 39% | 9% | +30 |
| Security | 98% | 88% | +10 |
| Arazzo workflows | 7% | 2% | +5 |
| Governance rules | 32% | 13% | +19 |
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 Brevo 87.3
- 2 Salesforce Marketing Cloud 83.5
- 3 Salesforce 83.3
- 4 HubSpot 82.4
- 5 ZoomInfo 80.8
- 6 SendGrid 77
- 7 Nylas 76.2
- 8 SendPulse 75.7
- 9 Mapp Marketing Cloud 74.7
- 10 GetResponse 74.1
Top by Agent Readiness
- 1 Lightfield 65.6
- 2 lemlist 63.9
- 3 Cordial 62.9
- 4 Common Room 60.8
- 5 Knak 58.8
- 6 Seamless.AI 58.7
- 7 Monaco 58.1
- 8 Loops 57.8
- 9 Mapp Marketing Cloud 56.3
- 10 Salesforce Marketing Cloud 56.2
This roster declares 309 members; 308
resolve to a provider in the catalog and 308 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
One button, every client — Claude, Cursor, VS Code and the rest.
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.
Call it yourself
curl for this page
This tag
curl "https://apis.io/api/v1/tags/contacts"
All tags
curl "https://apis.io/api/v1/tags?limit=25"
As a scored cohort
curl "https://apis.io/api/v1/cohorts/tag/contacts"
The distribution (Pro)
curl "https://apis.io/api/v1/cohorts/tag/contacts/stats" \
-H "X-API-Key: $APIS_IO_KEY"Discovery needs no key. Ratings and market analysis are Pro.