# Omnisend

**Canonical:** https://apis.io/providers/omnisend/  
**Website:** https://www.omnisend.com  
**APIs profiled:** 15

Omnisend is a Lithuanian-headquartered email and SMS marketing automation platform purpose-built for ecommerce, with first-class integrations into Shopify, BigCommerce, WooCommerce, Magento, Wix, Square Online, and other storefronts. The platform unifies automation workflows, campaign builders, segmentation, popups and forms, web push, product recommendations, A/B testing, and reporting to drive customer engagement and revenue. The REST API at version 2026-03-15 is served from https://api.omnisend.com/api and covers contacts, events and custom event metadata, products, product categories, segments, campaigns, automations, batches, email templates, email content, universal layouts, images, brands and analytics — 82 published operations across 15 OpenAPI 3.0.0 documents. Authentication is an API key on the Authorization header (Omnisend-API-Key {key}) or OAuth 2.0 authorization code with PKCE and 26 resource scopes; every request must also carry an Omnisend-Version header, and a retired version returns 410. Omnisend additionally operates two first-party hosted MCP servers at mcp.omnisend.com and is listed in Claude's Connector Directory.

## Kin Score — 70.3 / 100 (exemplar)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 70.3).

| Facet | Score |
|---|---|
| Discoverability | 92.6 |
| Contract Quality | 74.5 |
| Governance | 40.2 |
| Contract Governance | 40.2 |
| Operational Transparency | 97.4 |
| Developer Ergonomics | 47.0 |
| Commercial Clarity | 77.6 |
| Access Clarity | 77.6 |

## Agent readiness — 54.2 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | documented |
| MCP Server | documented |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | verified |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | yes |
| Agent Skills | derived |
| Well Known Catalog | yes |
| Consent Identity | yes |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (15)

- **Omnisend Analytics API** — The Analytics API from Omnisend — 2 operation(s) for analytics. Version 2026-03-15, harvested from Omnisend's published contract.
- **Omnisend Batches API** — The Batches API from Omnisend — 4 operation(s) for batches. Version 2026-03-15, harvested from Omnisend's published contract.
- **Omnisend Brands API** — The Brands API from Omnisend — 2 operation(s) for brands. Version 2026-03-15, harvested from Omnisend's published contract.
- **Omnisend Campaigns API** — The Campaigns API from Omnisend — 14 operation(s) for campaigns. Version 2026-03-15, harvested from Omnisend's published contract.
- **Omnisend Contacts API** — The Contacts API from Omnisend — 7 operation(s) for contacts. Version 2026-03-15, harvested from Omnisend's published contract.
- **Omnisend EmailContent API** — The EmailContent API from Omnisend — 3 operation(s) for emailcontent. Version 2026-03-15, harvested from Omnisend's published contract.
- **Omnisend EmailTemplates API** — The EmailTemplates API from Omnisend — 7 operation(s) for emailtemplates. Version 2026-03-15, harvested from Omnisend's published contract.
- **Omnisend EmailUniversalLayouts API** — The EmailUniversalLayouts API from Omnisend — 5 operation(s) for emailuniversallayouts. Version 2026-03-15, harvested from Omnisend's published contract.
- **Omnisend Events API** — The Events API from Omnisend — 1 operation(s) for events. Version 2026-03-15, harvested from Omnisend's published contract.
- **Omnisend Images API** — The Images API from Omnisend — 5 operation(s) for images. Version 2026-03-15, harvested from Omnisend's published contract.
- **Omnisend ProductCategories API** — The ProductCategories API from Omnisend — 5 operation(s) for productcategories. Version 2026-03-15, harvested from Omnisend's published contract.
- **Omnisend Products API** — The Products API from Omnisend — 5 operation(s) for products. Version 2026-03-15, harvested from Omnisend's published contract.
- **Omnisend Segments API** — The Segments API from Omnisend — 6 operation(s) for segments. Version 2026-03-15, harvested from Omnisend's published contract.
- **Omnisend Automations API** — The Automations API from Omnisend — 13 operation(s) for creating, enabling, copying and restructuring event-triggered automation workflows, including the sendWebhook action bloc...
- **Omnisend Event Metadata API** — The Event Metadata API from Omnisend — 3 operation(s) for declaring, merging and querying brand-custom event schemas. The only Omnisend operations that carry an operationId.

## MCP servers (1)

- **Omnisend MCP Server** — Omnisend ships two first-party hosted, remote MCP servers — the original at https://mcp.omnisend.com/mcp (4 tools) and a v2 at https://mcp.omnisend.com/v2/mcp (7 tools). Both ar...

## Agentic access (1)

- **Omnisend Agentic Access** — 60 operations · 38 acting

## Security (3)

- **Omnisend Authentication** — apiKey/oauth2 · 2 schemes
- **Omnisend Domain Security** — TLSv1.3 · HSTS · DMARC
- **Omnisend Vulnerability Disclosure** — security.txt · contact published

## Plans (1)

- **Omnisend Plans Pricing**

## Tags

Email Marketing, Marketing Automation, E-Commerce, SMS Marketing, Customer Engagement, Segmentation, Campaigns, Forms, Popups, Web Push, Automation Workflows, Analytics, MCP, Agent Ready, Transactional Messaging

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/omnisend/). Scores are computed from the provider's own public artifacts under a published rubric.