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SendHQ

SendHQ Emails and threads API

Send, retrieve, search, reply, and inspect delivery events.

Documentation Provider Profile APIs.io OpenAPI GitHub

SendHQ Emails and threads API is one of 8 APIs that SendHQ publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Emails and threads. The published artifact set on APIs.io includes an OpenAPI specification, an API reference, API documentation, and a getting-started guide.

This API exposes 8 operations across 5 paths, and defines 1 schema. It is described by OpenAPI 3.2.0, at version 2026-08-23.

Requests are made against a single base URL, https://sendhq.cc/api/v1.

8 operations 5 paths 1 schemas 1 DELETE4 GET1 PATCH2 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
2026-08-23
Base URL
https://sendhq.cc/api/v1
Authentication
HTTP Bearer, API Key
Resource Areas
1

Authentication & Security 2

SendHQ Emails and threads API declares 2 security schemes for authenticating requests. It accepts HTTP bearer tokens (re_…) (bearerAuth). An API key is passed in the cookie as sendhq_session_v2 (sessionCookie).

  • bearerAuth — Workspace API key. Keep it server-side.
  • sessionCookie — Browser session used for account administration.

Paths & Operations 8

Across 5 paths, the API surfaces 8 operations — 1 DELETE, 4 GET, 1 PATCH, 2 POST. Each is listed below with its method, path, parameters, and response codes.

Emails and threads 8

Send, retrieve, search, reply, and inspect delivery events.

POST
/emails
Send one email
post_emails 1 param body → 201400401404429
GET
/emails
List sent and received email
get_emails 12 params → 200400401404429
POST
/emails/batch
Send up to 100 individualized messages
post_emails_batch 1 param body → 201207400401404429
GET
/emails/{id}
Retrieve an email and its attachments
get_emails_id 1 param → 200400401404429
PATCH
/emails/{id}
Mark an email read or unread
patch_emails_id 1 param body → 200400401404429
DELETE
/emails/{id}
Delete a retained email
delete_emails_id 1 param → 200400401404429
GET
/emails/{id}/events
List delivery events for an email
get_emails_id_events 1 param → 200400401404429
GET
/threads/{id}
Retrieve a conversation chronologically
get_threads_id 1 param → 200400401404429

Schemas 1

The contract defines 1 schema that model the data the API accepts and returns. The most detailed is Error (1 property). Each schema is shown below with its type and property counts.

Error
object
1 property 1 required

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

sendhq-emails-and-threads-api-openapi.yml Raw ↑

Other APIs SendHQ publishes across the network.

SendHQ Account and billing API
AE Profile APIs.io
SendHQ Deliverability API
AE Profile APIs.io
SendHQ Domains API
AE Profile APIs.io
SendHQ Drafts and attachments API
AE Profile APIs.io
SendHQ Hosted templates API
AE Profile APIs.io
SendHQ Inbound email API
AE Profile APIs.io
SendHQ REST API
AE Profile APIs.io
#Emails and threads
← Back to S APIs
API Details
ID
sendhq:sendhq-emails-and-threads-api
Base URL
https://sendhq.cc/api/v1
Docs
https://sendhq.cc/docs/api-reference
Provider
SendHQ
APIs.io →  GitHub →
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This is an independent, third-party profile of SendHQ Emails and threads API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

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