How AI is applied across API Evangelist and APIs.io. Read my AI disclosure →
API Evangelist API Evangelist
Discovery
Learnings
Guidance
Toolbox
Alignment
API Evangelist LLC
Discovery
Learnings
Guidance
Toolbox
Alignment
API Evangelist LLC

Need help?

Contact us
Postmark

Postmark Messages API API

The Messages API API from Postmark — 11 operation(s) for messages api.

Documentation Provider Profile APIs.io OpenAPI GitHub

Postmark Messages 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 Messages 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 11 operations across 11 paths, and defines 18 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/.

11 operations 11 paths 18 schemas 9 GET2 PUT

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 11

Across 11 paths, the API surfaces 11 operations — 9 GET, 2 PUT. Each is listed below with its method, path, parameters, and response codes.

Messages API 11
GET
/messages/outbound
Postmark Outbound message search
searchOutboundMessages 9 params → 200422500
GET
/messages/outbound/{messageid}/details
Postmark Outbound message details
getOutboundMessageDetails 2 params → 200422500
GET
/messages/outbound/{messageid}/dump
Postmark Outbound message dump
getOutboundMessageDump 2 params → 200422500
GET
/messages/inbound
Postmark Inbound message search
searchInboundMessages 11 params → 200422500
GET
/messages/inbound/{messageid}/details
Postmark Inbound message details
getInboundMessageDetails 2 params → 200422500
PUT
/messages/inbound/{messageid}/bypass
Postmark Bypass rules for a blocked inbound message
bypassRulesForInboundMessage 2 params → 200422500
PUT
/messages/inbound/{messageid}/retry
Postmark Retry a failed inbound message for processing
retryInboundMessageProcessing 2 params → 200422500
GET
/messages/outbound/opens
Postmark Opens for all messages
searchOpensForOutboundMessages 15 params → 200422500
GET
/messages/outbound/opens/{messageid}
Postmark Retrieve Message Opens
getOpensForSingleOutboundMessage 4 params → 200422500
GET
/messages/outbound/clicks
Postmark Clicks for a all messages
searchClicksForOutboundMessages 15 params → 200422500
GET
/messages/outbound/clicks/{messageid}
Postmark Retrieve Message Clicks
getClicksForSingleOutboundMessage 4 params → 200422500

Schemas 18

The contract defines 18 schemas that model the data the API accepts and returns. The most detailed are InboundMessageFullDetailsResponse (20 properties), OutboundMessageDetailsResponse (17 properties), InboundMessageDetail (16 properties), OutboundMessageDetail (13 properties). Each schema is shown below with its type and property counts.

OutboundMessageDetail
object
13 properties
MessageHeader
object
A single header for an email message.
2 properties
MessageEventDetails
object
4 properties
MessageClickSearchResponse
object
2 properties
StandardPostmarkResponse
object
A Postmark API error.
2 properties
EmailNameAddressPair
object
2 properties
OutboundMessageDetailsResponse
object
17 properties
HeaderCollection
array
OutboundMessageDumpResponse
object
1 property
ExtendedMessageClickEventInformation
object
11 properties
InboundSearchResponse
object
2 properties
InboundMessageDetail
object
16 properties
AttachmentCollection
array
MessageOpenSearchResponse
object
2 properties
OutboundSearchResponse
object
2 properties
ExtendedMessageOpenEventInformation
object
10 properties
InboundMessageFullDetailsResponse
object
20 properties
Attachment
object
An attachment for an email message.
4 properties

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

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

Other APIs Postmark publishes across the network.

Postmark Activate API
AE Profile APIs.io
Postmark Alias API
AE Profile APIs.io
Postmark Batch API
AE Profile APIs.io
Postmark Bounceid API
AE Profile APIs.io
Postmark Bounces API API
AE Profile APIs.io
Postmark Bounces API
AE Profile APIs.io
Postmark Browser Families API
AE Profile APIs.io
Postmark Bypass API
AE Profile APIs.io
Postmark Deliverystats API
AE Profile APIs.io
Postmark Domains API API
AE Profile APIs.io
Postmark Dump API
AE Profile APIs.io
Postmark Email API
AE Profile APIs.io
#Messages API
← Back to P APIs
API Details
ID
postmark:postmark-messages-api-api
Base URL
https://api.postmarkapp.com
Docs
https://postmarkapp.com/developer
Provider
Postmark
APIs.io →  GitHub →
Explore more
All APIs Providers APIs.io Network
Work with this as data

Every API here is available over the API and to AI agents over MCP. APIs is not yet its own endpoint on the v1 API. Reach this content through network search and the tag graph, or the MCP server below.

Installs https://mcp.apievangelist.com/mcp in Claude, Cursor, VS Code and the rest — one button, every client.

MCP tools for apis
4 tools reach this content
  • search_api_evangelistSearch every content type across the network at once.
  • find_relatedThe shared-tag relevance graph — what else covers this.
  • get_tagEverything one tag labels, across all content types.
  • guide_topicPRO — a curated bundle for a topic: area, guidance, rules, papers, stories, services.
All tools & prompts
Call it yourself
curl for this page
Search the network for this 
curl "https://api.apievangelist.com/v1/search?q=postmark-messages-api-api&limit=10"
Everything under a tag 
curl "https://api.apievangelist.com/v1/tags/postmark-messages-api-api"

Discovery needs no key. Full bodies and the synthesis endpoints are Pro.

Get an API key

Free tier, no email required. Sign in with whichever identity you already have.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have. Your account

Where this information came from

This is an independent, third-party profile of Postmark Messages 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.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.

info@apievangelist.com · Read the full data-sourcing policy →
On a security or compliance team? Put security in the subject line and you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.