# MailOptin Site REST API and MCP Server

**Canonical:** https://apis.io/apis/mailoptin/mailoptin-site/  
**Provider:** MailOptin — https://apis.io/providers/mailoptin/  
**Base URL:** https://mailoptin.io/wp-json  
**Documentation:** https://mailoptin.io/

MailOptin Site REST API and MCP Server is published by [MailOptin](https://apis.io/providers/mailoptin/) on the [APIs.io](https://apis.io/) network. Tagged areas include WordPress, MCP, and Authentication. The published artifact set on APIs.io includes authentication docs and rate-limit docs.

The WordPress REST API served by mailoptin.io, plus the Model Context Protocol server exposed through the WordPress MCP Adapter at the mcp namespace. The REST root is a public, self-describing route index — 35 namespaces and 771 routes, each with its argument schema — and content routes under wp/v2 answer anonymously. The MCP endpoint is live but auth-gated, returning 401 mcp_unauthorized with a WWW-Authenticate Bearer challenge that links to RFC 9728 protected-resource metadata. This is the company website's own surface, not a product API for the MailOptin lead-generation service, which ships as a self-hosted WordPress plugin.

## Machine-readable artifacts (7)

- **MCPServer** — https://raw.githubusercontent.com/api-evangelist/mailoptin/refs/heads/main/mcp/mailoptin-mcp.yml
- **Authentication** — https://raw.githubusercontent.com/api-evangelist/mailoptin/refs/heads/main/authentication/mailoptin-authentication.yml
- **OAuthScopes** — https://raw.githubusercontent.com/api-evangelist/mailoptin/refs/heads/main/scopes/mailoptin-scopes.yml
- **ErrorCatalog** — https://raw.githubusercontent.com/api-evangelist/mailoptin/refs/heads/main/errors/mailoptin-problem-types.yml
- **Conventions** — https://raw.githubusercontent.com/api-evangelist/mailoptin/refs/heads/main/conventions/mailoptin-conventions.yml
- **RateLimits** — https://raw.githubusercontent.com/api-evangelist/mailoptin/refs/heads/main/rate-limits/mailoptin-rate-limits.yml
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/mailoptin/refs/heads/main/apis.yml

## Tags

WordPress, MCP, Authentication

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/mailoptin/mailoptin-site/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/mailoptin/.