Missive API

Name: Missive API
Brand: Missive API
Availability: InStock

★ Only Publicly Available OpenAPI DocumentCommunicationsEmail Deliverybearer4 EndpointsREST

For Agents

Create email drafts in a shared Missive inbox, sync contacts, and read conversation threads through the public Missive API.

Connect the Missive API to your agent

Jentic One is a self-hosted execution layer for AI agents. It lets your agent call the Missive API, or any other public or private API you need. You set the rules, the agent never sees your credentials, and every call is logged.

Install Jentic One Beta (Self-Hosted)

Jentic One Host machine

# On the machine that will host your Jentic One instance:
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh

Agent machine

# On the machine where your agent runs (keep this separate from the instance):
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh
jentic register       # connects your agent to your Jentic One instance

Jentic One is in public beta. The setup above keeps your agent separate from the instance, which is what you want before using real credentials: an agent running as the same OS user as Jentic One can read its stored keys directly. Just evaluating? A single local install is fine to start. See the secure deployment guide for the tiers.

Capabilities

What an agent can do with Missive API.

Create a new email draft in a shared inbox via POST /drafts with recipients, subject, and body

Create or update a contact record using POST /contacts so it appears in the team's address book

Retrieve a single conversation by id via GET /conversations/{id} including its messages and metadata

List conversations with GET /conversations to surface threads matching the team's filters

GET STARTED

Start building with Missive API

Explore with Jentic

View OpenAPI Document

Use Cases

Patterns agents use Missive API for, with concrete tasks.

★ AI-Drafted Replies for Human Review

An agent reads incoming customer messages from a shared inbox, drafts a reply, and posts it as a Missive draft via POST /drafts so a human teammate can review, edit, and send. Captures the speed of automation without sending unreviewed copy to customers.

POST /drafts to the shared inbox with the recipient, subject, and AI-drafted body, leaving the message unsent for human review

Contact Sync from External Systems

Push contact records from a CRM or signup form into Missive via POST /contacts so teammates see context the moment a thread arrives. The endpoint handles both creation and updates so nightly sync jobs stay simple.

POST /contacts with email, name, and phone for every new lead added in the CRM in the last 24 hours

Conversation Export for Analysis

Pull conversation threads with GET /conversations/{id} into a data warehouse or analytics tool to analyse response times, sentiment, or topic mix. Use GET /conversations to discover ids matching the desired filter, then fetch each thread's full message history.

GET /conversations to list ids, then GET /conversations/{id} for each to extract messages into a warehouse table

Agent-Driven Inbox Workflows

An AI agent uses Jentic to orchestrate Missive: read inbound threads, draft suggested replies, sync contacts. The bearer token sits in the Jentic vault, scoped to the team's account, so the agent never holds the secret directly.

Search Jentic for 'create a draft email', load the Missive draft schema, and post drafts for every unanswered customer thread from today

Key Endpoints

4 endpoints — jentic publishes the only available openapi specification for missive api, keeping it validated and agent-ready.

METHOD

PATH

DESCRIPTION

POST

/drafts

Create an email draft

POST

/contacts

Create or sync a contact

GET

/conversations

List conversations

GET

/conversations/{id}

Get a conversation by id

POST

/drafts

Create an email draft

POST

/contacts

Create or sync a contact

GET

/conversations

List conversations

GET

/conversations/{id}

Get a conversation by id

Why Jentic?

Three things that make agents converge on Jentic-routed access.

Credential isolation

The Missive bearer token is stored encrypted in the Jentic vault. Agents call Missive through scoped execution requests, so the token never enters the agent's context, prompts, or logs.

Intent-based discovery

Agents search Jentic for intents like 'create a draft email' or 'sync a contact' and Jentic returns the matching Missive operation with its input schema, no separate Missive docs lookup required.

Time to first call

Direct Missive integration: a few hours to wire bearer auth and the small endpoint set. Through Jentic: under 30 minutes — search, load schema, execute.

FAQs

Specific to using Missive API through Jentic.

Why is there no official OpenAPI spec for Missive API?

Missive does not publish an OpenAPI specification. Jentic generates and maintains this spec so that AI agents and developers can call Missive API via structured tooling. It is validated against the live API and kept up to date. Get started at https://app.jentic.com/sign-up.

What authentication does the Missive API use?

Missive uses HTTP bearer token authentication. The token is sent in the Authorization header as `Bearer <token>` and can be issued from the Missive integrations settings. Jentic stores the token in its vault and injects it per call.

Can I create a draft email with the Missive API?

Yes. POST /drafts creates an unsent draft in a shared inbox. Provide the recipients, subject, and body; teammates will see the draft alongside other inbox items and can edit or send it.

How do I retrieve the full message history for a conversation?

Call GET /conversations/{id} with the conversation id. The response includes the conversation metadata and the ordered list of messages on the thread, including authors and timestamps.

How do I draft customer replies through Jentic?

Run `pip install jentic`, search Jentic for 'create a draft email', and Jentic returns the Missive POST /drafts operation. Provide the inbox, recipients, subject, and AI-generated body, then execute. The draft appears in Missive for human review.

Missive API

Connect the Missive API to your agent

Capabilities

Start building with Missive API

Use Cases

Key Endpoints

Why Jentic?

Related APIs

FAQs