# sendmux-ai

**Canonical:** https://apis.io/providers/sendmux-ai/  
**Website:** https://sendmux.ai/  
**APIs profiled:** 1

Sendmux AI provides an Email API designed for AI agents, offering unified endpoints to send and receive emails, manage calendars, and store files. The platform includes inboxes for agents, developer tools, SDKs, and a CLI, enabling seamless integration of email capabilities into AI-driven applications across various use cases such as customer support, sales outreach, and scheduling.

## Kin Score — 72.8 / 100 (exemplar)

Scored 2026-10-31 under rubric 0.25.0.

| Facet | Score |
|---|---|
| Discoverability | 66.1 |
| Contract Quality | 68.9 |
| Contract Governance | 79.1 |
| Operational Transparency | 44.7 |
| Developer Ergonomics | 82.6 |
| Access Clarity | 73.2 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 31.8 (matched via fallback).

## Agent readiness — 77.3 (agent-native)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | unknown |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | served |
| Idempotency | verified |
| Error Semantics | verified |
| OpenAPI Examples | partial |
| Rate Limit Signal | verified |
| 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 | na |
| Operation Distinctiveness | distinct |

## APIs (11)

- **sendmux-ai Billing API** — The Billing API from sendmux-ai — 3 operation(s) for billing.
- **sendmux-ai Connection API** — The Connection API from sendmux-ai — 1 operation(s) for connection.
- **sendmux-ai Domain Filters API** — The Domain Filters API from sendmux-ai — 1 operation(s) for domain filters.
- **sendmux-ai Domains API** — The Domains API from sendmux-ai — 4 operation(s) for domains.
- **sendmux-ai Emails API** — The Emails API from sendmux-ai — 3 operation(s) for emails.
- **sendmux-ai Inboxes API** — The Inboxes API from sendmux-ai — 2 operation(s) for inboxes.
- **sendmux-ai Mailbox API** — The Mailbox API API from sendmux-ai — 48 operation(s) for mailbox api.
- **sendmux-ai Mailbox Filters API** — The Mailbox Filters API from sendmux-ai — 1 operation(s) for mailbox filters.
- **sendmux-ai Mailboxes API** — The Mailboxes API from sendmux-ai — 9 operation(s) for mailboxes.
- **sendmux-ai Sending accounts API** — The Sending accounts API from sendmux-ai — 11 operation(s) for sending accounts.
- **sendmux-ai Webhooks API** — The Webhooks API from sendmux-ai — 6 operation(s) for webhooks.

## Agentic access (1)

- **Sendmux Ai Agentic Access** — 119 operations · 50 acting · 2 human-in-the-loop

## Security (2)

- **Sendmux Ai Authentication** — 2 schemes
- **Sendmux Ai Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Plans (1)

- **Sendmux Ai Plans Pricing**

## Tags

Company, Email, AI, Agents, Integration

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