Missive website screenshot

Missive

Missive is a team inbox and collaboration platform that brings email, SMS, WhatsApp, Instagram, Facebook Messenger, and live chat into one unified workspace. It provides a REST API for managing conversations, messages, contacts, labels, drafts, analytics, and automation rules, enabling teams to integrate Missive into business workflows. The API supports webhooks for real-time event notifications, custom channels for integrating external communication sources, and UI/iFrame integrations via JavaScript. Developers can automate drafts, sync contacts, generate analytics reports, and build custom integrations with the platform.

Missive publishes 7 APIs on the APIs.io network, including Analytics API, Contact Books API, Contact Groups API, and 4 more. Tagged areas include Team Inbox, Collaboration, Email, Messaging, and Conversations.

The Missive catalog on APIs.io includes 1 JSON-LD context.

Missive’s developer surface includes authentication, documentation, engineering blog, pricing, and 12 more developer resources.

🌐 Visit website 📡 Source on GitHub
41.9/100 thin ▬ flat Agent 31/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessPaidOpenFree trial⚡ Free to try
7 APIs
Team InboxCollaborationEmailMessagingConversationsContactsWebhooksAutomationREST API

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 41.9/100 · thin
Contract Quality 16.4 / 25
Developer Ergonomics 4.3 / 20
Commercial Clarity 11.6 / 20
Operational Transparency 2.7 / 13
Governance 0.0 / 12
Discoverability 7.4 / 10
Agent readiness — 31/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 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/missive: 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 7

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

Missive Analytics API

Create and retrieve analytics reports

Missive Contact Books API

List available contact books

Missive Contact Groups API

List contact groups and organizations

Missive Contacts API

Manage contacts and contact data

Missive Conversations API

Manage conversations in the inbox

Missive Drafts API

Create and delete draft messages

Missive Messages API

Create messages in custom channels

Scroll for all 7

Pricing Plans 1

Published pricing tiers and plan structures.

Missive Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Missive Rate Limits

0 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Missive Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Missive Context

77 classes · 0 properties

JSON-LD

Security Posture 4

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Missive Authentication

http · 1 scheme

SECURITY

Missive Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Missive Vulnerability Disclosure

security.txt · contact published

SECURITY

Missive Trust Center

SOC 2, GDPR

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Missive Agentic Access

19 operations · 8 acting

19 operations · 8 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrg
GitHubOrg

Access & Security 4

Authentication, authorization, and security posture

TrustCenter
TrustCenter
 VulnerabilityDisclosure
VulnerabilityDisclosure
 DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 2

Status, limits, changes, and where to get help

StatusPage
StatusPage
 RateLimits
RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing
Pricing
 Plans
Plans
 FinOps
FinOps

Company 3

The organization behind the API

Website
Website
 LinkedIn
LinkedIn
 Blog
Blog

Other 1

Properties that don't map to a standard resource type

X
X

Source (apis.yml)

apis.yml Raw ↑ 
name: Missive
description: Missive is a team inbox and collaboration platform that brings email, SMS, WhatsApp, Instagram, Facebook Messenger,
  and live chat into one unified workspace. It provides a REST API for managing conversations, messages, contacts, labels,
  drafts, analytics, and automation rules, enabling teams to integrate Missive into business workflows. The API supports webhooks
  for real-time event notifications, custom channels for integrating external communication sources, and UI/iFrame integrations
  via JavaScript. Developers can automate drafts, sync contacts, generate analytics reports, and build custom integrations
  with the platform.
type: Index
accessModel:
  pricing: paid
  onboarding: open
  trial: true
  try_now: true
  public: true
  label: Paid (free trial) · Open access
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/missive.png
url: https://raw.githubusercontent.com/api-evangelist/missive/refs/heads/main/apis.yml
created: '2026-06-12'
modified: '2026-06-12'
specificationVersion: '0.19'
aid: missive
tags:
- Team Inbox
- Collaboration
- Email
- Messaging
- Conversations
- Contacts
- Webhooks
- Automation
- REST API
apis:
- aid: missive:missive-analytics-api
  name: Missive Analytics API
  description: Create and retrieve analytics reports
  humanURL: https://missiveapp.com/docs/developers/rest-api
  baseURL: https://public.missiveapp.com/v1/
  tags:
  - Analytics
  properties:
  - type: OpenAPI
    url: openapi/missive-analytics-api-openapi.yml
  - type: Documentation
    url: https://missiveapp.com/docs/developers/rest-api
- aid: missive:missive-contact-books-api
  name: Missive Contact Books API
  description: List available contact books
  humanURL: https://missiveapp.com/docs/developers/rest-api
  baseURL: https://public.missiveapp.com/v1/
  tags:
  - Contact Books
  properties:
  - type: OpenAPI
    url: openapi/missive-contact-books-api-openapi.yml
  - type: Documentation
    url: https://missiveapp.com/docs/developers/rest-api
- aid: missive:missive-contact-groups-api
  name: Missive Contact Groups API
  description: List contact groups and organizations
  humanURL: https://missiveapp.com/docs/developers/rest-api
  baseURL: https://public.missiveapp.com/v1/
  tags:
  - Contact Groups
  properties:
  - type: OpenAPI
    url: openapi/missive-contact-groups-api-openapi.yml
  - type: Documentation
    url: https://missiveapp.com/docs/developers/rest-api
- aid: missive:missive-contacts-api
  name: Missive Contacts API
  description: Manage contacts and contact data
  humanURL: https://missiveapp.com/docs/developers/rest-api
  baseURL: https://public.missiveapp.com/v1/
  tags:
  - Contacts
  properties:
  - type: OpenAPI
    url: openapi/missive-contacts-api-openapi.yml
  - type: Documentation
    url: https://missiveapp.com/docs/developers/rest-api
- aid: missive:missive-conversations-api
  name: Missive Conversations API
  description: Manage conversations in the inbox
  humanURL: https://missiveapp.com/docs/developers/rest-api
  baseURL: https://public.missiveapp.com/v1/
  tags:
  - Conversations
  properties:
  - type: OpenAPI
    url: openapi/missive-conversations-api-openapi.yml
  - type: Documentation
    url: https://missiveapp.com/docs/developers/rest-api
- aid: missive:missive-drafts-api
  name: Missive Drafts API
  description: Create and delete draft messages
  humanURL: https://missiveapp.com/docs/developers/rest-api
  baseURL: https://public.missiveapp.com/v1/
  tags:
  - Drafts
  properties:
  - type: OpenAPI
    url: openapi/missive-drafts-api-openapi.yml
  - type: Documentation
    url: https://missiveapp.com/docs/developers/rest-api
- aid: missive:missive-messages-api
  name: Missive Messages API
  description: Create messages in custom channels
  humanURL: https://missiveapp.com/docs/developers/rest-api
  baseURL: https://public.missiveapp.com/v1/
  tags:
  - Messages
  properties:
  - type: OpenAPI
    url: openapi/missive-messages-api-openapi.yml
  - type: Documentation
    url: https://missiveapp.com/docs/developers/rest-api
common:
- type: AgenticAccess
  url: agentic-access/missive-agentic-access.yml
- type: TrustCenter
  url: security/missive-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/missive-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/missive-domain-security.yml
- type: Authentication
  url: authentication/missive-authentication.yml
- type: Website
  url: https://missiveapp.com
- type: Documentation
  url: https://missiveapp.com/docs/developers/
- type: GitHubOrg
  url: https://github.com/missive
- type: LinkedIn
  url: https://www.linkedin.com/company/missive-app
- type: Blog
  url: https://missiveapp.com/blog
- type: Pricing
  url: https://missiveapp.com/pricing
- type: StatusPage
  url: https://status.missiveapp.com/
- type: X
  url: https://twitter.com/missiveapp
- type: Plans
  url: plans/missive-plans-pricing.yml
- type: RateLimits
  url: rate-limits/missive-rate-limits.yml
- type: FinOps
  url: finops/missive-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com