# openmail-sh

**Canonical:** https://apis.io/providers/openmail-sh/  
**Website:** https://openmail.sh/  
**APIs profiled:** 1

Openmail.sh is a developer-focused email service platform that provides programmable email sending, inbound routing, and webhook notifications. It enables applications to integrate email capabilities via simple RESTful APIs, offering features such as template management, analytics, and domain authentication. The service targets SaaS developers, marketers, and enterprises seeking to automate transactional and marketing communications while maintaining deliverability and compliance.

## Kin Score — 70.4 / 100 (exemplar)

Scored 2026-10-31 under rubric 0.25.0.

| Facet | Score |
|---|---|
| Discoverability | 67.9 |
| Contract Quality | 65.8 |
| Contract Governance | 70.9 |
| Operational Transparency | 67.9 |
| Developer Ergonomics | 66.0 |
| Access Clarity | 73.2 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 28.2 (matched via fallback).

## Agent readiness — 69.2 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | unknown |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | served |
| Idempotency | verified |
| Error Semantics | derived |
| OpenAPI Examples | partial |
| Rate Limit Signal | documented |
| Event Surface Described | unknown |
| Agent Skills | unknown |
| Well Known Catalog | yes |
| Consent Identity | no |
| Agent Card | conformant |
| Dry Run Mode | no |
| Delegated Identity | served |
| Protected Resource Metadata | verified |
| Dynamic Client Registration | yes |
| Agentic Commerce | no |
| Pagination Ratio | partial |
| Operation Distinctiveness | distinct |

## APIs (10)

- **openmail-sh Attachments API** — Downloading and extracting text from attachments
- **openmail-sh Domains API** — Custom domains: add your own sending/receiving domain, publish DNS, and verify it
- **openmail-sh Feedback API** — Reporting bugs, friction, and feature requests to the OpenMail team
- **openmail-sh Inboxes API** — Email inboxes and their webhook configuration
- **openmail-sh Limits API** — Sending limits: today's cold outreach caps on new recipients, per account, inbox, and domain, and what raises them
- **openmail-sh Messages API** — Sending and listing messages
- **openmail-sh Owned Domains API** — Domains your organisation controls but does not send from. Prove ownership with one TXT record and mail to their addresses stops counting toward the cold outreach limits.
- **openmail-sh Pods API** — Isolated sub-accounts for your end users or tenants
- **openmail-sh Policy API** — Correspondent policy — provider-enforced allow/block rules and allowlist mode, scoped per account, pod, or inbox. Account-wide key only.
- **openmail-sh Threads API** — Conversation threads and read status

## Agentic access (1)

- **Openmail Sh Agentic Access** — 47 operations · 28 acting · 2 human-in-the-loop

## Security (3)

- **Openmail Sh Authentication** — 1 scheme
- **Openmail Sh Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC
- **Openmail Sh Vulnerability Disclosure** — security.txt · contact published

## Plans (1)

- **Openmail Sh Plans Pricing**

## Tags

Company, Email, API, AI, Developer

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