Contacts
Business capabilities this tag reaches
Customer Relationship Management 5
Variants seen in the corpus:
Contactscontacts
Providers using this tag (55)
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Exemplar 6 Complete, well-documented, and agent-ready
Strong 17 Solid coverage with minor gaps
Developing 15 Usable, with meaningful gaps to close
Thin 8 Limited public surface area
Emerging 4 Early or largely undocumented
Minimal 1 Almost no public developer surface
APIs with this tag (307)
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 40 Complete, well-documented, and agent-ready
Salesforce Contacts APIOperations for listing, retrieving, and deleting Marketing Cloud contact records.brevo Contacts APICreate, retrieve, update, and delete individual contacts.HubSpot CRM Contacts APIHubSpot CRM Contacts — 16 operation(s) from HubSpot's published OpenAPI.Elation Health Contacts APIThe Contacts API from Elation Health — 8 operation(s) for 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...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...SendGrid Contacts APITwilio SendGrid Marketing Campaigns Contacts APIClose Contacts APIThe contacts API from Close — 2 operation(s) for contacts.Mailchimp Contacts APIThe contacts API from Mailchimp — 6 operation(s) for contacts.Nylas Contacts APIContacts. Read, create, update and delete a grant's contacts and contact groups.Zoho CRM Contacts APIThe Contacts API from Zoho CRM — 4 operation(s) for contacts.Cvent Contacts APIA contact is a record in your account’s address book that represents an individual. The data stored within ...Cvent 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...ActiveCampaign Contacts APIThe Contacts API from ActiveCampaign — 28 operation(s) for contacts.Plunk Contacts APIManage contacts and their subscription state.SendPulse Contacts APIThe Contacts API from SendPulse — 51 operation(s) for contacts.GetResponse Contacts APIAPI documentation for contacts and their properties (e.g., tags, custom fields)Squarespace Contacts APIManage customer contacts and address book entries for a website: create, read, update, delete, and query co...Microsoft Azure Contacts APIThe Contacts API from Microsoft Azure — 2 operation(s) for contacts.Twilio Contacts APIManage marketing contactsOmnisend Contacts APIThe Contacts API from Omnisend — 7 operation(s) for contacts. Version 2026-03-15, harvested from Omnisend's...lemlist Contacts APICRM-side contacts, contact lists, list membership and exports.Cvent Event Cloud Contacts APIContact/address bookCvent Platform REST API (Event Cloud)RESTful API for managing events, contacts, registrations, attendees, sessions, speakers, exhibitors, survey...Givebutter Contacts APIThe Contacts API from Givebutter — 6 operation(s) for contacts. Split by tag from Givebutter's own publishe...Loops Contacts APICreate, update, find and delete contacts, and manage suppression status. 6 operation(s) in the Loops REST A...Constant Contact Contacts APIEndpoints and methods to get, create, delete, and update one or more contacts.Impact Radius Contacts APIThe Contacts API from Impact Radius — 2 operation(s) for contacts.Microsoft Dynamics 365 Sales Contacts APIContact (person) recordsAlphaLoops FMCSA Carrier Data API Contacts APIThe Contacts API from AlphaLoops FMCSA Carrier Data API — 2 operation(s) for contacts.Impact Contacts APIThe Contacts API from Impact — 2 operation(s) for contacts.Lightfield Contacts APIThe Contacts API from Lightfield — 3 operation(s) for contacts.Lev Contacts APIThe Contacts API from Lev — 5 operation(s) for contacts.Factset Contacts APIThe Contacts API from Factset — 8 operation(s) for contacts.Oracle Siebel Contacts APIOperations on Contact business objects representing individual people associated with accounts and organiza...UserGems Contacts APIAdd and remove contacts UserGems should track for job changes.Ontraport REST APIRESTful API providing CRUD access to contacts, transactions, tags, sequences, forms, landing pages, and eco...
Strong 63 Solid coverage with minor gaps
Seamless.AI Public APIThe Seamless.AI Public API v1 — nine operations covering contact and company search, asynchronous enrichmen...AskNicely Contacts APIImport, look up, deactivate and privacy-delete contacts.Keap Contacts APIKeap Contact API — 27 operations across 16 paths on the Keap REST v2 contract, read from Keap's own publish...Spruce Health Contacts APIThe Contacts API from Spruce Health — 6 operation(s) for contacts.Common Room Contacts APIThe Contacts API from Common Room — 6 operation(s) for contacts.Weave Contacts APIPatient/customer contacts and contact info.D&B Direct+ Search APIThe Search surface of D&B Direct+ lets applications find businesses, principals, and related entities using...Docusign Contacts APIThe Contacts resource provides methods that allow you to manage contacts.Simon Data Contacts APIContact profile lookup.Vessel Contacts APIThe contacts API from Vessel — 5 operation(s) for contacts.Shop-Ware Contacts APIThe Contacts API from Shop-Ware — 2 operation(s) for contacts.Mailmodo Contacts APIAdd, remove, archive, unsubscribe, resubscribe, and look up contactsSilverpop Contacts APIContact (recipient) list managementSendlane Contacts APIThe Contacts API from Sendlane — 18 operation(s) for contacts.Dotdigital Contacts APIThe Contacts API from Dotdigital — 6 operation(s) for contacts.Erxes GraphQL APIGraphQL Federation API powering the erxes XOS platform. An Apollo Router gateway federates one subgraph per...Inflection.io Contacts APIThe Contacts API from Inflection.io — 6 operation(s) for contacts.Avalara Contacts APIManage company contactsGetAccept Contacts APIEverything related to contactsLevitate Contacts APIThe Contacts API from Levitate — 5 operation(s) for contacts.Levitate MCP ServerHosted remote MCP server (streamable HTTP) that connects Levitate to AI assistants — Claude Desktop, Claude...Cordial Contacts APIThe contacts API from Cordial — 17 operation(s) for contacts.Kartra APIKartra's inbound developer API. One endpoint, POST only, form-encoded, with the operation selected by `acti...Zendesk Sell Contacts APIThe Zendesk Sell Contacts API provides a simple interface to manage your contacts. A contact represents an ...Microsoft Power Apps Contacts APIOperations on the contact entity set. A contact represents a person with whom a business unit has a relatio...OK Capsule Contacts APIRoutes to manage contactsMicrosoft Contacts APIManage contactsSmartlead Leads APIEndpoints to add leads to a campaign in bulk, fetch leads, update lead status (interested, replied, unsubsc...Apollo API ContactsCreate, update, and search the people your team saves in Apollo. Harvested from the Apollo-published OpenAP...Apollo.io Contacts APIWorkspace CRM contacts — create, update, search, stages and ownership. 10 operation(s) from the published A...CoreLogic (Cotality) Contacts APICRM contact records (name, address, phone, email).Salesflare Contacts APIThe Contacts API from Salesflare — 2 operation(s) for contacts.Cisco Umbrella Contacts APIThe Contacts API from Cisco Umbrella — 2 operation(s) for contacts.Paid contacts APIThe contacts API from Paid — 5 operation(s) for contacts.LeafLink Contacts APIThe contacts API from LeafLink — 4 operation(s) for contacts.CloudTalk Contacts APIAll data you can get about your contacts.Knak Contacts APICreate, retrieve and list contacts in Knak Send.Synthflow Contacts APIThe contacts API from Synthflow — 2 operation(s) for 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.Currencycloud Contacts APICreate, search and manage the list of users that have access in your Currencycloud account or associated su...Mastercard Business Payment ControlsBusiness Payment Controls is an application programming interface (API) based solution that simplifies busi...Soldo Software and Services Contacts APIThe Contacts API from Soldo Software and Services — 2 operation(s) for contacts.Crescendo Lab Contacts APIAddress book with NCC-consent tracking.Kiteworks contacts APIThe contacts API from Kiteworks — 2 operation(s) for contacts.Filevine Contacts APIManage the global Filevine contact list and project-scoped contact attachments. Contacts represent clients,...PayMate Contacts APIBuyer / supplier contact onboarding and maintenanceThe Mobile First Company Contacts APISearch and retrieve contact information with sorting and pagination. Includes engagement level tracking.SimpleTexting Contacts APICreate, read, update, and delete individual contacts.Sinch Contacts APIManage contacts and their channel identities. Contacts group together underlying connected channel recipien...Solvimon contacts APIThe contacts API from Solvimon — 2 operation(s) for contacts.Amazon Ground Station Contacts APIThe Contacts API from Amazon Ground Station — 1 operation(s) for contacts.Microsoft Exchange Contacts APIOperations for managing personal contactsSupaglue Contacts APIThe `Contact` Common Object represents a "contact" in CRMs.Reachdesk Contacts APIThe Contacts API from Reachdesk — 1 operation(s) for contacts.Zavu Contacts APIThe Contacts API from Zavu — 8 operation(s) for contacts.Outlook Contacts APIAccess to Outlook personal contacts for managing contact information, creating contact folders, and organiz...NationBuilder Contacts APIContacts are logged interactions between people in your nation. More information about contacts and the fie...Pinch Payments Contacts APIThe Contacts API from Pinch Payments — 2 operation(s) for contacts.Amazon Connect Contacts APIOperations for managing contacts and contact interactionsOpenPhone Contacts APIOperations related to contactsZepto Contacts APIYour Contacts form an address book of parties with whom you can interact. In order to initiate any type of ...Apideck Contacts APIThe Contact resource represents individuals, including details such as name, contact information, associate...
Developing 108 Usable, with meaningful gaps to close
Zoho Contacts APIThe Contacts API from Zoho — 4 operation(s) for contacts.Coperniq contacts APIThe contacts API from Coperniq — 2 operation(s) for contacts.iContact REST APIREST API v2.2 for managing contacts, lists, segments, campaigns, messages, sends, and reporting inside the ...Resend Contacts APICreate and manage Contacts through the Resend API.Hatch contacts APIThe contacts API from Hatch — 1 operation(s) for contacts.Crowd.dev Contacts APISecurity contacts for a package — includes contact PII (e.g. reporter emails). The contract gates these beh...Paperless Parts Contacts APIPaperless Parts includes Customer Relationship Management (CRM) functionality to make it easy to send quote...Flickr Contacts APICalling user's contacts and recent contact activityLawmatics Contacts APIA Contact can be thought of as a collection of data about a "Person". A Contact record is the base for all ...OKKI Go Contacts APIThe Contacts API from OKKI Go (go.okki.ai) — 1 retired operation (POST /api/v1/contacts/search returns 410 ...Ritten Contacts APIThe contacts API from Ritten — 3 operation(s) for contacts.SolarWinds Contacts APIManage alert contactsServiceTitan Contacts APICustomer contact methods (phone, email)WeChat Work (WeCom) APIServer API for Enterprise WeChat / WeCom — Tencent's enterprise collaboration suite. All calls are HTTPS/JS...HR Partner Contacts APIList employee contact details (phone, email, emergency).Kaseya Contacts APIThe Contacts API from Kaseya — 13 operation(s) for contacts.Outlook Mail APIAPI for accessing and managing email, calendar, contacts, and tasks in Outlook.Lone Wolf Technologies Contacts APIManage transaction contacts.Mixmax Contacts APIMixmax Contacts (people you've emailed) — deprecated resource groupEverbridge Contacts APIContacts operationsTPG Telecom Messaging Hub Contacts APIContacts Management API for the Vodafone Business Messaging Hub, providing CRUD over contacts, lists and cu...Tripleseat Contacts APICreate and associate contacts with accounts.QGenda Contacts APIThe Contacts API from QGenda — 3 operation(s) for contacts.Tidio Contacts APIManage contacts (website visitors identified by name, email, or phone)TUI Group Contacts APIThe contacts API from TUI Group — 1 operation(s) for contacts.Quo Contacts APIOperations related to contactsPeople APIRead and manage the authenticated user contacts and profiles, and search the directory.TrustLayer contacts APIThe contacts API from TrustLayer — 4 operation(s) for contacts.Agree APIREST API for the Agree contract-to-cash platform. 56 operations across six resources: Agreements (create fr...Beazley Contacts APIThe Contacts API from Beazley — 4 operation(s) for contacts.ManyChat Subscriber APILook up, search, create, update, tag and set custom field values on subscribers. 15 operations. A subscribe...NationGraph Contacts APIThe Contacts API from NationGraph — 2 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 ...VaultRE Contacts APIOperations related to contactsCatchpoint Contacts APIThe Contacts API from Catchpoint — 3 operation(s) for contacts.Payt contacts APIOperations about contactsSalesforce Service Cloud Contacts APIOperations for managing contact recordsAffinity API V1The legacy Affinity V1 API provides comprehensive read and write access to core CRM data including persons,...Decisiv Contacts APIThe Contacts API from Decisiv — 4 operation(s) for contacts.Oracle Eloqua Contacts APIManage contact records and dataN3XT Contacts APIThe Contacts API from N3XT — 2 operation(s) for contacts.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).Zoho Inventory contacts APIContacts ModuleAscend Contacts APIRepresents the contacts that may be associated with an Insured account.Google People APIThe Google People API provides access to information about profiles and contacts, allowing applications to ...Monaco Contacts APIThe Contacts API from Monaco — 3 operation(s) for contacts.Vooma Contacts APIThe Contacts API from Vooma — 2 operation(s) for contacts.Aptly Contacts APIThe Contacts API from Aptly — 5 operation(s) for contacts.Soldo Contacts APIThe Contacts API from Soldo — 2 operation(s) for contacts.Front Core APIThe Front Core API is a REST API over Front's shared-inbox platform. It exposes conversations, messages, dr...Pax8 Contacts APIContacts represent the people who should be provided visibility into events such as provisioningStackOne 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...Help Scout Customers APIThe Customers API from Help Scout — 2 operation(s) for customers.BoldSign Contacts APIThe Contacts API from BoldSign — 5 operation(s) for contacts.Missive Contacts APIManage contacts and contact datailert Contacts APIThe Contacts API from ilert — 4 operation(s) for contacts.Microsoft Dynamics 365 Contacts APIPerson with whom a business unit has a relationship, such as a customer, supplier, or colleague.Alto (Vebra / Zoopla) Contacts APIThe Contacts API from Alto (Vebra / Zoopla) — 13 operation(s) for contacts.Oracle Fusion Cloud Applications Contacts APIManage contact records associated with accountsGojiberry AI Contacts APIThe Contacts API from Gojiberry AI — 5 operation(s) for contacts.Wrike Contacts APIUsers and user groups in Wrike accountsFixture Contacts APICreate, read, update, and delete person records.Beeper Contacts APIPer-account address book and network lookup. The same person can appear under multiple Accounts.Clio Contacts APIAll clients, prospective clients, companies, and external co-counsels can be viewed as Contacts under the C...Truto Contacts APIContact records representing individuals at companiesAgentPhone contacts APIThe contacts API from AgentPhone — 3 operation(s) for contacts.Kajabi Contacts APIThe Contacts API from Kajabi — 4 operation(s) for contacts.bexio Contacts APIThe Contacts API from bexio — 2 operation(s) for contacts.Reclaim.ai contacts APIThe contacts API from Reclaim.ai — 7 operation(s) for contacts.Intercom Contacts APIManage users and leads in your Intercom workspace.Mailjet Contacts APIManage contacts and propertiesRespond.io Contacts APICreate, read, update, merge, list, and delete contacts.Smokeball Contacts APIThe Contacts API from Smokeball — 6 operation(s) for contacts.SegMetrics Import APIThe v1 Import API lets a customer push their own data into a SegMetrics integration — contacts (with UTM at...Dropbox Contacts APIThe Contacts API from Dropbox — 2 operation(s) for contacts.PandaDoc Contacts APIOperations for managing the PandaDoc contacts directory, including creating, reading, updating, and deletin...Bird Contacts APIManage workspace contacts and lists.Bird Customer Data APISync customer data from multiple sources in real time to build a 360-degree customer view. Manage contacts,...Happyrobot Contacts APIThe Contacts API from Happyrobot — 5 operation(s) for contacts.Starlink Contacts APIThe Contacts API from Starlink — 2 operation(s) for contacts.Pylon Contacts APIIndividual contacts (end customers).Remberg contacts APIThe contacts API from Remberg — 2 operation(s) for contacts.Rightsline Contacts APIContact and company managementCCP Games Contacts APIThe Contacts API from CCP Games — 6 operation(s) for contacts.Formbricks Contacts APIManage contacts and contact attribute keys.Swoogo Contacts APIOrganization-level CRM contacts and contact fields.Sage Contacts APICustomer and supplier contact managementDiaspora Contacts APIThe Contacts API from Diaspora — 2 operation(s) for contacts.Front Contacts APIThe Contacts API from Front — 6 operation(s) for contacts.MyCase Contacts APIPeople and client relationships associated with cases.Reonic Contacts APIExternal people you interact with, such as customers or leads. Not to be confused with [**Users**](#tag/use...EVE Online Contacts APIThe Contacts API from EVE Online — 13 operation(s) for contacts.Chatfuel Contacts APIBulk-create WhatsApp contacts inside a Chatfuel automation. POST a list of up to 1,000 E.164 phone numbers ...Chatwoot Client APIThe Client API is designed for building custom messaging interfaces for end users. Authenticates using inbo...Chatwoot Contacts APIContact management APIsParaşüt Contacts APIThe Contacts API from Paraşüt — 4 operation(s) for contacts.VSCO Contacts APIThe Contacts API from VSCO — 2 operation(s) for contacts.Whippy Contacts APIManage contacts and communication preferences.Chatfuel Contacts APIThe only documented Chatfuel API operation as of 2026-08-13. POST https://panel.chatfuel.com/api/contacts/{...SleekFlow Contacts APICreate, read, search, update, and delete contacts.Unstoppable Domains contacts APICreate and manage ICANN-required contacts for domain registration. Contacts represent individuals or organi...Proton.ai Contacts APIThe Contacts API from Proton.ai — 3 operation(s) for contacts.Propertyware Contacts APIResources providing access to contacts.Rackspace Technology Contacts APICustomer contact operations.
Thin 74 Limited public surface area
Rainbow Contacts APIManage and search contactsChatbase Contacts APIManage contacts and custom attributes for a chatbot.SMSAPI Contacts APIThe Contacts API from SMSAPI — 4 operation(s) for contacts.Quaderno Contacts APICustomers and vendors.Service Fusion Contacts APIIndividual contacts and service locations on a customer account.JAGGAER Contacts APIEvent contact managementCommusoft Contacts APIManage contacts linked to customers or suppliersFleetbase Contacts APICustomer and facilitator contacts.FreeAgent Contacts APIThe Contacts API from FreeAgent — 2 operation(s) for contacts.lexoffice Contacts APICustomers and vendors.Uptime.com Contacts APIManage contact groups used for alert notifications.Spaceship Contacts APIThe Contacts API from Spaceship — 2 operation(s) for contacts.Fleetio Contacts APIThe Contacts API from Fleetio — 2 operation(s) for contacts.ezyVet Contacts APIContacts (clients / pet owners) and their details. (Confirmed CRUD.)Lever Contacts APIThe Contacts API from Lever — 1 operation(s) for contacts.COR Contacts APIThe Contacts API from COR — 3 operation(s) for contacts.dotloop Contacts APIThe authenticated user's contacts (address book).Trengo Contacts APIManage contacts and contact profiles.Messente Contacts APIManage contacts in the Messente Phonebook.Rasayel Contacts APIThe Contacts API from Rasayel — 5 operation(s) for contacts.Textmagic Contacts APIManage contacts in the address book.Zoho Books Contacts APIThe Contacts API from Zoho Books — 4 operation(s) for contacts.Microsoft Dynamics Contacts APIThe Contacts API from Microsoft Dynamics — 2 operation(s) for contacts.Zuora Contacts APIA contact defines the customer who holds an account or who is otherwise a person to contact about an accoun...Joblogic Contacts APIContacts attached to customers, sites, suppliers, and subcontractors.Apollo Contacts APIThe Contacts API from Apollo — 3 operation(s) for contacts.JustCall Contacts APICreate and manage contacts in the JustCall directory.WildApricot Contacts APIContact/member managementGrowthZone Contacts APIIndividuals (persons) and organizations, and their related data.Waste Management Contacts APIManage billing and service contacts.Samsara Contacts APIThe Contacts API from Samsara — 2 operation(s) for contacts.SurveyMonkey Contacts APIThe Contacts API from SurveyMonkey — 3 operation(s) for contacts.SkySlope Contacts APIThe Contacts API from SkySlope — 4 operation(s) for contacts.WM Contacts APIBilling and service contacts on an account.engageSPARK Contacts APIThe Contacts API from engageSPARK — 2 operation(s) for contacts.Termii Contacts APIManage phonebooks and the contacts within them.Encompass Contacts APIBorrower (consumer) and business contacts (modeled).Groove GraphQL API v2GraphQL API exposing conversations, messages, agents, contacts, mailboxes, tags, and knowledge base data th...MYOB Business APIREST-based cloud API for MYOB AccountRight, MYOB Essentials, and MYOB Business. Provides endpoints for mana...Drift Contacts API[https://devdocs.drift.com/docs/contact-model](https://devdocs.drift.com/docs/contact-model)messagebird Contacts APIOperations for managing individual contacts.Distru Contacts APIThe Contacts API from Distru — 2 operation(s) for 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...Printavo Customers and Contacts APIGraphQL surface for customers (companies) and their contacts. Query single or plural customers and contacts...Apex27 Contacts APIApplicants, vendors, landlords, tenants and buyers held in the CRM.freshdesk Contacts APIManage contacts (end users) who submit support tickets.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.freshworks Contacts APIManage customer contacts including creation, updates, merging, and deactivation.JOBOX.ai Contacts APIThe contacts API from JOBOX.ai — 5 operation(s) for contacts.Aircall Contacts APIThe Contacts API from Aircall — 2 operation(s) for contacts.Dialpad Contacts APIThe Contacts API from Dialpad — 2 operation(s) for contacts.DealerSocket Customers APIInbound customer integration surface. The Customer Update integration modifies customer records in DealerSo...NodePing Contacts APIThe Contacts API from NodePing — 1 operation(s) for contacts.Routable Contacts APIContacts associated with companies.Alchemer REST APIRESTful API v5 for managing surveys, responses, contacts, campaigns, and account resources within the Alche...GoDaddy Contacts APIThe Contacts API from GoDaddy — 1 operation(s) for contacts.Cacheflow Contacts APIThe Contacts API from Cacheflow — 2 operation(s) for contacts.Clear Books REST APIRESTful API for integrating with Clear Books accounting software to manage invoices, payments, contacts, ba...Wealthbox Contacts APIThe Contacts API from Wealthbox — 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...Embat Contacts API`Contact` represents a client or supplier your company transacts with. `customId` is the unique identifier ...Getro Network API v2Read-oriented JSON REST API exposing a Getro network's companies, jobs and contacts, plus shared reference ...Xero Accounting Contacts APIThe Contacts API from Xero Accounting — 1 operation(s) for contacts.graph8 build APIOne REST API across the revenue surface — contacts, companies, campaigns and events — plus SDKs, a CLI and ...Zoho Invoice Contacts APIThe Contacts API from Zoho Invoice — 3 operation(s) for contacts.Grapes Finance Contacts APIBeneficiary management for third-party payoutsAccelo Contacts APIThe Contacts API from Accelo — 2 operation(s) for contacts.Chatwork Contacts APIThe Contacts API from Chatwork — 1 operation(s) for contacts.Replyr.ai Contacts APIThe Contacts API from Replyr.ai — 12 operation(s) for contacts.SmartSimple SmartConnect Users APIGet, list, and update the people (applicants, reviewers, contacts, and internal staff) in a SmartSimple ins...
Emerging 19 Early or largely undocumented
Zoho Desk Contacts APIThe Contacts API from Zoho Desk — 2 operation(s) for contacts.Rentec Direct Open APIThe Rentec Direct Open API v3 provides RESTful access to property management data including properties, ten...Jones Lang LaSalle Contacts APIManage contacts including vendors and tenants.Bizzabo Public APIRESTful API for managing B2B events including conferences, speakers, ticketing, attendee registration, cont...DNSimple Contacts APIThe Contacts API from DNSimple — 1 operation(s) for contacts.Meow Contacts APIManage contacts for crypto and USDC transfers.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...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...Zeffy Contacts APIAn organization's donors and supporters.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.FranConnect CRM APICRM module (path segment "cm"). Read and write contacts and relationship/communication records that support...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...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...Personify Wild Apricot APIRESTful API for the Wild Apricot small-association product, secured with OAuth 2.0 against base https://api...ResWare Contacts APIModeled logical service area for the people and organizations attached to a file - buyers, sellers, lenders...
Companies reaching this through an API (262)
These companies publish an API, specification or operation carrying “Contacts” 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.
Accelo
ActiveCampaign
AgentPhone
Agile CRM
Agree.com
Aircall
Alchemer
AlphaLoops FMCSA Carrier Data API
Alto (Vebra / Zoopla)
Amazon Connect
Amazon Ground Station
Amazon Web Services
Apex27
Apideck
Apollo
Apollo API Documentation
Apollo.io
Applied Systems
Aptly
Ascend
AskNicely
Avalara
Beazley
Beeper
bexio
BigChange
Bird
Bizzabo
BoldSign
Buildium
Cacheflow
Catchpoint
Catchpoint Systems
Catnip
CCP Games
Chatbase
Chatfuel
Chatwork
Cisco Umbrella
Clear Books
Clio
Close
CloudTalk
Common Room
Commusoft
Coperniq
COR
Cordial
CoreLogic (Cotality)
Crescendo Lab
Show all 262 companies ↓
Crowd.dev
Currencycloud
Cvent
Cvent Registration
DealerSocket
Decisiv
Dialpad
Diaspora
Distru
DNSimple
Docusign
dotloop
Drift
Dropbox
Dun & Bradstreet
Elation Health
Embat
Encompass
engageSPARK
Erxes
EVE Online
Everbridge
EZLynx
ezyVet
Factset
Filevine
Fixture
Fleetbase
Fleetio
Flickr
Formbricks
FranConnect
FreeAgent
Freshdesk
Freshworks
Front
FrontApp
GetAccept
Getro
Givebutter
GoDaddy
Gojiberry AI
Google
Google Workspace
Grapes Finance
Groove
GrowthZone
Happyrobot
Hatch
Help Scout
HR Partner
HubSpot
ilert
Impact
Impact Radius
Intercom
Intermedia
JAGGAER
Joblogic
JOBOX.ai
Jones Lang LaSalle
JustCall
Kaseya
Kiteworks
Knak
Lawmatics
LeafLink
LEAP
lemlist
Lev
Lever
Lightfield
Lone Wolf Technologies
Loops
Loops
Mailchimp
Mailjet
Mailmodo
ManyChat
Mastercard
Meow
Messagebird
Messente
Microsoft
Microsoft Azure
Microsoft Dynamics
Microsoft Dynamics 365
Microsoft Dynamics 365 Sales
Microsoft Office
Microsoft Office 365
Microsoft Power Apps
Mixmax
MyCase
N3XT
NationBuilder
NationGraph
Nimble
NodePing
OK Capsule
Omnisend
Onafriq
Ontraport
OpenPhone
Oracle Eloqua
Oracle Fusion Cloud Applications
Oracle Siebel
Orange Logic
Paid
PandaDoc
Paperless Parts
Paraşüt
Pax8
PayMate
Payt
Personify
Pico
Pinch Payments
Plunk
Printavo
Propertyware
Proton.ai
Pylon
QGenda
Quaderno
Qualia
Rackspace Technology
Rainbow
Rasayel
Reachdesk
Reclaim.ai
Remberg
Rentec Direct
Reonic
Replyr.ai
Resend
Respond.io
ResWare
Rightsline
Ritten
Routable
Sage
Salesforce
Salesforce Marketing Cloud
Salesforce Service Cloud
Samsara
Seamless.AI
SegMetrics
SendGrid
SendPulse
Service Fusion
ServiceTitan
Shop-Ware
Silverpop
Simon Data
Sinch
SkySlope
SleekFlow
Smartlead
SmartSimple
SMSAPI
SolarWinds
Soldo
Soldo Software and Services
Solvimon
Spaceship
Squarespace
StackOne
Starlink
Supaglue
SurveyMonkey
Swoogo
Synthflow
Termii
Textmagic
The Mobile First Company
TPG Telecom
Trengo
Tripleseat
TrustLayer
Truto
TUI Group
Twilio
Unstoppable Domains
Uptime.com
UserGems
VaultRE
Vessel
Vooma
VSCO
Waste Management
WATI
Wealthbox
Weave
WeChat
Whippy
WildApricot
WM
Wrike
Xero Accounting
Xiaoman (OKKI)
Zavu
Zeffy
Zendesk
Zendesk Sell
Zepto
Zoho
Zoho Books
Zoho CRM
Zoho Desk
Zoho Inventory
Zoho Invoice
Zuora
Score breakdown
Frequency
80.2
log-scaled weighted occurrences
Breadth
1.5
spread across providers
Quality lift
55.4
mean composite of providers using it
Cohesion
16.3
strength of nearest seed neighbor
Related tags
CRM 91 co-occurrences
Task 66 co-occurrences
Notes 41 co-occurrences
Marketing Automation 42 co-occurrences
Campaigns 47 co-occurrences
Message 47 co-occurrences
SMS 41 co-occurrences
Conversations 36 co-occurrences
Where this tag comes from
Provider tag56
Api tag310
Openapi tag224
Openapi op tag1295
Cohort brief
Auto-generatedThe 50 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
50
all scored
Mean Kin Score
50.4
+26.5 vs catalog 23.9
Mean Agent Readiness
31.6
+19.6 vs catalog 12
Spread
7.8–87.3
median 50.8 · σ 17.3
How the 50 split by band
Exemplar 6Strong 17Developing 15Thin 8Emerging 3Minimal 1
Facet averages, against the whole catalog
| Facet | This cohort | Catalog | Difference | Scored |
|---|---|---|---|---|
| Contract Quality | 54.3 | 19.8 | +34.5 | 50 |
| Access Clarity | 58.7 | 26.5 | +32.2 | 50 |
| Operational Transparency | 41.1 | 13.9 | +27.2 | 50 |
| Developer Ergonomics | 48.2 | 23.4 | +24.8 | 50 |
| Discoverability | 69.6 | 61.2 | +8.4 | 50 |
| Contract Governance | 12.1 | 6.4 | +5.7 | 50 |
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) | 30% | 10% | +20 |
| MCP server (first-party) | 41% | 13% | +28 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 33% | 11% | +22 |
| Security | 93% | 96% | -3 |
| Arazzo workflows | 9% | 2% | +7 |
| Governance rules | 35% | 14% | +21 |
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 ZoomInfo 84.7
- 3 Nylas 76.6
- 4 GetResponse 74.3
- 5 Cvent Event Cloud 69.9
- 6 Constant Contact 68.7
- 7 Infusionsoft (Keap) 65.2
- 8 Keap 65
- 9 Spruce Health 64.9
- 10 Microsoft Graph 64.1
Top by Agent Readiness
- 1 Nylas 59.3
- 2 Brevo 54.8
- 3 ZoomInfo 54.7
- 4 Monaco 50.2
- 5 Inflection.io 49.3
- 6 Spruce Health 48.4
- 7 Salesflare 48.4
- 8 Keap 48
- 9 GetResponse 47.8
- 10 Cvent Event Cloud 46.1
All 55 members of this roster resolve to a scored provider in
the catalog.Generated from the catalog build of
16 September 2026, across 27514
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.