Hilos

Hilos is a WhatsApp Business Platform automation company (backed by 500 Global and Techstars, now part of ActiveCampaign) that helps businesses capture leads, qualify prospects, and automate follow-ups over WhatsApp's Cloud API. Its REST API exposes contacts, inbox conversations, WhatsApp message templates, and no-code flow executions, authenticated with an `Authorization: Token` API key against https://api.hilos.io/api/ and paginated with `page` / `page_size` query parameters.

Hilos publishes 6 APIs on the APIs.io network, including Contact API, Conversation API, Flow Execution API, and 3 more. Tagged areas include Company, WhatsApp, Messaging, Automation, and CRM.

The Hilos catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Hilos’ developer surface includes documentation, API reference, getting-started guide, authentication, engineering blog, signup flow, support, and 23 more developer resources.

🌐 Visit website 📡 Source on GitHub

44.1/100 developing ▬ flat Agent 52/100 agent ready Full breakdown ↓
scored 2026-08-17 · rubric v0.11.0

AccessSelf serve

6 APIs 1 MCP Servers

CompanyWhatsAppMessagingAutomationCRMConversational CommerceChatbotsCustomer EngagementMarketing

Kin Score

Kin Score How this is scored →
scored 2026-08-17 · rubric v0.11.0

Composite quality — 44.1/100 · developing

Contract Quality 16.5 / 25

Developer Ergonomics 11.2 / 20

Commercial Clarity 6.8 / 20

Operational Transparency 0.0 / 13

Governance 1.4 / 12

Discoverability 8.2 / 10

Agent readiness — 52/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 8 / 8

Dry-Run / Simulate Mode 0 / 4

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/hilos: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 6

Individual APIs this provider publishes, each with its own machine-readable definition.

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Rate Limits 1

Documented rate limits and quota policies.

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

LLMsTxt

MCPServer

WellKnown

AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Conformance

Lifecycle

DataModel

Build 2

SDKs, sample code, and the tooling you integrate with

ToolCrosswalk

ToolCrosswalk

Packages

Packages

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

Support

Support

RateLimits

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Plans

Plans

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 3

Properties that don't map to a standard resource type

Overlay

Overlay

AgentCard

AgentCard

Events

Events

Source (apis.yml)

aid: hilos
name: Hilos
description: 'Hilos is a WhatsApp Business Platform automation company (backed by 500 Global and Techstars, now part of ActiveCampaign)
  that helps businesses capture leads, qualify prospects, and automate follow-ups over WhatsApp''s Cloud API. Its REST API
  exposes contacts, inbox conversations, WhatsApp message templates, and no-code flow executions, authenticated with an `Authorization:
  Token` API key against https://api.hilos.io/api/ and paginated with `page` / `page_size` query parameters.'
url: https://raw.githubusercontent.com/api-evangelist/hilos/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
- techstars
x-tier: stub
x-tier-reason: portfolio-lead
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-08-13'
image: https://app.hilos.io/logo512.png
tags:
- Company
- WhatsApp
- Messaging
- Automation
- CRM
- Conversational Commerce
- Chatbots
- Customer Engagement
- Marketing
apis:
- aid: hilos:hilos-contact-api
  name: Hilos Contact API
  description: The Contact API from Hilos — 2 operation(s) for contact.
  humanURL: https://hilos.io/docs
  baseURL: https://api.hilos.io/api/
  tags:
  - Contact
  properties:
  - type: OpenAPI
    url: openapi/hilos-contact-api-openapi.yml
- aid: hilos:hilos-conversation-api
  name: Hilos Conversation API
  description: The Conversation API from Hilos — 2 operation(s) for conversation.
  humanURL: https://hilos.io/docs
  baseURL: https://api.hilos.io/api/
  tags:
  - Conversation
  properties:
  - type: OpenAPI
    url: openapi/hilos-conversation-api-openapi.yml
- aid: hilos:hilos-flow-execution-api
  name: Hilos Flow Execution API
  description: The Flow Execution API from Hilos — 3 operation(s) for flow execution.
  humanURL: https://hilos.io/docs
  baseURL: https://api.hilos.io/api/
  tags:
  - Flow Execution
  properties:
  - type: OpenAPI
    url: openapi/hilos-flow-execution-api-openapi.yml
- aid: hilos:hilos-flow-execution-contact-api
  name: Hilos Flow Execution Contact API
  description: The Flow Execution Contact API from Hilos — 2 operation(s) for flow execution contact.
  humanURL: https://hilos.io/docs
  baseURL: https://api.hilos.io/api/
  tags:
  - Flow Execution Contact
  properties:
  - type: OpenAPI
    url: openapi/hilos-flow-execution-contact-api-openapi.yml
- aid: hilos:hilos-user-api
  name: Hilos User API
  description: The User API from Hilos — 1 operation(s) for user.
  humanURL: https://hilos.io/docs
  baseURL: https://api.hilos.io/api/
  tags:
  - User
  properties:
  - type: OpenAPI
    url: openapi/hilos-user-api-openapi.yml
- aid: hilos:hilos-whatsapp-api
  name: Hilos WhatsApp API
  description: The WhatsApp API from Hilos — 3 operation(s) for whatsapp.
  humanURL: https://hilos.io/docs
  baseURL: https://api.hilos.io/api/
  tags:
  - WhatsApp
  properties:
  - type: OpenAPI
    url: openapi/hilos-whatsapp-api-openapi.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Overlay
  url: overlays/hilos-openapi-overlay.yaml
- type: DomainSecurity
  url: security/hilos-domain-security.yml
- type: AgenticAccess
  url: agentic-access/hilos-agentic-access.yml
- type: Website
  url: https://hilos.io
- type: DeveloperPortal
  url: https://hilos.io/docs
- type: Documentation
  url: https://hilos.io/docs
- type: APIReference
  url: https://hilos.io/docs/developer/apidocs/contact/get-apicontact
- type: GettingStarted
  url: https://hilos.io/docs/developer/getting-started/test-request
- type: Authentication
  url: authentication/hilos-authentication.yml
- type: Blog
  url: https://hilos.io/blog
- type: Plans
  url: plans/hilos-plans-pricing.yml
- type: SignUp
  url: https://hilos.io/signup-ac
- type: Login
  url: https://app.hilos.io/login
- type: TermsOfService
  url: https://hilos.io/terms-and-conditions
- type: PrivacyPolicy
  url: https://hilos.io/privacy-policy
- type: Support
  url: mailto:hey@hilos.io
- type: LLMsTxt
  url: llms/hilos-llms.txt
- type: Conventions
  url: conventions/hilos-conventions.yml
- type: ErrorCatalog
  url: errors/hilos-problem-types.yml
- type: Conformance
  url: conformance/hilos-conformance.yml
- type: Lifecycle
  url: lifecycle/hilos-lifecycle.yml
- type: DataModel
  url: data-model/hilos-data-model.yml
- type: MCPServer
  url: mcp/hilos-mcp.yml
- type: ToolCrosswalk
  url: mcp/hilos-tool-crosswalk.yml
- type: AgentCard
  url: a2a/hilos-a2a.yml
- type: WellKnown
  url: well-known/hilos-well-known.yml
- type: Packages
  url: packages/hilos-packages.yml
- type: RateLimits
  url: rate-limits/hilos-rate-limits.yml
- type: Events
  url: asyncapi/hilos-events.yml
- type: AgentSkill
  url: skills/_index.yml
x-enrichment:
  date: '2026-08-13'
  status: enriched
  artifacts_added: 9
  pass: local-v1