# Postmark Sender Signatures API API

**Canonical:** https://apis.io/apis/postmark/postmark-sender-signatures-api-api/  
**Provider:** Postmark — https://apis.io/providers/postmark/  
**Base URL:** https://api.postmarkapp.com  
**Documentation:** https://postmarkapp.com/developer

Postmark Sender Signatures API API is one of 30 APIs that [Postmark](https://apis.io/providers/postmark/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification and an AsyncAPI event-driven specification. Tagged areas include Sender Signatures API. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, a getting-started guide, authentication docs, and an AsyncAPI specification.

The Sender Signatures API API from Postmark — 5 operation(s) for sender signatures api.

## Machine-readable artifacts (6)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/postmark/refs/heads/main/openapi/postmark-sender-signatures-api-api-openapi.yml
- **Documentation** — https://postmarkapp.com/developer
- **GettingStarted** — https://postmarkapp.com/developer/api/overview
- **Authentication** — https://postmarkapp.com/developer/api/overview#authentication
- **AsyncAPI** — https://raw.githubusercontent.com/api-evangelist/postmark/refs/heads/main/asyncapi/postmark-webhooks-asyncapi.yml
- **Overlay** — https://raw.githubusercontent.com/api-evangelist/postmark/refs/heads/main/overlays/postmark-sender-signatures-api-api-overlay.yaml

## Other Postmark APIs (12)

- [Postmark Activate API](https://apis.io/apis/postmark/postmark-activate-api/)
- [Postmark Alias API](https://apis.io/apis/postmark/postmark-alias-api/)
- [Postmark Batch API](https://apis.io/apis/postmark/postmark-batch-api/)
- [Postmark Bounceid API](https://apis.io/apis/postmark/postmark-bounceid-api/)
- [Postmark Bounces API API](https://apis.io/apis/postmark/postmark-bounces-api-api/)
- [Postmark Bounces API](https://apis.io/apis/postmark/postmark-bounces-api/)
- [Postmark Browser Families API](https://apis.io/apis/postmark/postmark-browser-families-api/)
- [Postmark Bypass API](https://apis.io/apis/postmark/postmark-bypass-api/)
- [Postmark Deliverystats API](https://apis.io/apis/postmark/postmark-deliverystats-api/)
- [Postmark Domains API API](https://apis.io/apis/postmark/postmark-domains-api-api/)
- [Postmark Dump API](https://apis.io/apis/postmark/postmark-dump-api/)
- [Postmark Email API](https://apis.io/apis/postmark/postmark-email-api/)

## Tags

Sender Signatures API

---

Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/postmark/postmark-sender-signatures-api-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/postmark/.