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Postmark Sending API API

The Sending API API from Postmark — 4 operation(s) for sending api.

Postmark Sending API API is one of 30 APIs that Postmark publishes on the APIs.io network, described by a machine-readable OpenAPI specification and an AsyncAPI event-driven specification.

Tagged areas include Sending API. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, a getting-started guide, authentication docs, and an AsyncAPI specification.

This API exposes 4 operations across 4 paths, and defines 10 schemas. It is described by OpenAPI 3.2.0, at version 1.0.0.

Requests are made against a single base URL, https://api.postmarkapp.com/.

4 operations 4 paths 10 schemas 4 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
1.0.0
Base URL
https://api.postmarkapp.com
Resource Areas
1

Paths & Operations 4

Across 4 paths, the API surfaces 4 operations — 4 POST. Each is listed below with its method, path, parameters, and response codes.

Sending API 4
POST
/email
Postmark Send a single email
sendEmail 1 param body → 200422500
POST
/email/batch
Postmark Send a batch of emails
sendEmailBatch 1 param body → 200422500
POST
/email/withTemplate
Postmark Send an email using a Template
sendEmailWithTemplate 1 param body → 200422500
POST
/email/batchWithTemplates
Postmark Send a batch of email using templates.
sendEmailBatchWithTemplates 1 param body → 200422500

Schemas 10

The contract defines 10 schemas that model the data the API accepts and returns. The most detailed are EmailWithTemplateRequest (14 properties), SendEmailRequest (13 properties), SendEmailResponse (5 properties), Attachment (4 properties). Each schema is shown below with its type and property counts.

SendEmailBatchRequest
array
MessageHeader
object
A single header for an email message.
2 properties
SendEmailResponse
object
The standard response when a postmark message is sent
5 properties
HeaderCollection
array
EmailWithTemplateRequest
object
14 properties 5 required
AttachmentCollection
array
SendEmailTemplatedBatchRequest
object
1 property
SendEmailRequest
object
13 properties
Attachment
object
An attachment for an email message.
4 properties
SendEmailBatchResponse
array

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

postmark-sending-api-api-openapi.yml Raw ↑

Other APIs Postmark publishes across the network.

Postmark Activate API
Postmark Alias API
Postmark Batch API
Postmark Bounceid API
Postmark Bounces API API
Postmark Bounces API
Postmark Browser Families API
Postmark Bypass API
Postmark Deliverystats API
Postmark Domains API API
Postmark Dump API
Postmark Email API
Where this information came from

This is an independent, third-party profile of Postmark Sending API 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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