# Inbox

**Canonical:** https://apis.io/providers/inbox/  
**Website:** https://apievangelist.com/  
**APIs profiled:** 2

Inbox is an API Evangelist index of email and inbox-oriented API platforms that developers use to send, receive, parse, route, schedule, and verify email messages. The index focuses on transactional and conversational email providers exposing programmatic access to message lifecycle, deliverability, and inbox automation primitives.

## Kin Score — 13.4 / 100 (emerging)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 13.4).

| Facet | Score |
|---|---|
| Discoverability | 75.9 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 7.9 |
| Developer Ergonomics | 0.0 |
| Commercial Clarity | 23.7 |
| Access Clarity | 23.7 |

## Agent readiness — 3.0 (human-only)

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

## Access

Freemium — onboarding: unknown, pricing: freemium, trial: no (confidence: medium).

## APIs (2)

- **Mailgun Email API** — Mailgun provides a programmable email API for sending, receiving, tracking, and validating email at scale. Endpoints cover messages, domains, suppressions, mailing lists, webhoo...
- **Nylas Email API** — Nylas exposes a unified REST API for email, calendar, contacts, and scheduling across Google, Microsoft, iCloud, and IMAP providers. Developers can read, send, and thread messag...

## Security (2)

- **Inbox Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC
- **Inbox Trust Center** — SOC 2, ISO 27001, PCI DSS, HIPAA, GDPR

## Plans (1)

- **Inbox Plans Pricing**

## Tags

Email, Inbox, Messaging, Deliverability, Transactional Email

---

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