# Exclaimer

**Canonical:** https://apis.io/providers/exclaimer/  
**Website:** https://exclaimer.com/  
**APIs profiled:** 1

Exclaimer is an email signature management platform used by IT, marketing, and sales teams to centrally create, deploy, and govern corporate email signatures across Microsoft 365, Microsoft Exchange, and Google Workspace. It manages signatures for more than 9 million email accounts, adding campaign banners, meeting-branding backgrounds, click-tracking analytics, directory synchronization with Azure AD and Google Directory, and role-based access control. Exclaimer publishes the Exclaimer Cloud API — a partner/distributor provisioning REST API documented at cloudapi.exclaimer.com with a machine- readable OpenAPI 3.0.1 definition covering subscriptions, MSP subscriptions, subscription users, resellers, end users, mailbox counts, subscription transfers and reference data. It operates a multi-region Exclaimer Cloud with a real-time status page and a strong security and compliance program (SOC 2 Type II, ISO 27001/27018, HIPAA, PCI DSS, CSA STAR, Cyber Essentials).

## Kin Score — 58.5 / 100 (strong)

Scored 2026-08-17 under rubric 0.11.0. Trend: rising (+36.7 from 21.8).

| Facet | Score |
|---|---|
| Discoverability | 87.0 |
| Contract Quality | 53.9 |
| Governance | 20.8 |
| Operational Transparency | 55.3 |
| Developer Ergonomics | 41.3 |
| Commercial Clarity | 92.1 |

## Agent readiness — 28.4 (agent-aware)

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

## Access

Requires approval — onboarding: approval, pricing: unknown, trial: no (confidence: medium).

## APIs (1)

- **Exclaimer Cloud API** — Partner and distributor provisioning API for Exclaimer Cloud tenants. Covers creating and managing subscriptions (add, update, activate, deactivate, end, reactivate, migrate, tr...

## Security (4)

- **Exclaimer Authentication** — apiKey · 1 scheme
- **Exclaimer Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC
- **Exclaimer Vulnerability Disclosure** — security.txt · contact published
- **Exclaimer Trust Center** — SOC 2 Type II, ISO/IEC 27001, ISO/IEC 27018, PCI DSS, CSA (Cloud Security Alliance), Cyber Essentials, HIPAA, GDPR, CCPA

## Plans (1)

- **Exclaimer Plans Pricing**

## Tags

Company, Email, Email Signatures, Email Signature Management, Microsoft 365, Google Workspace, Marketing, Productivity, SaaS, Security

---

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