close.com
Close is a sales CRM with built-in calling, SMS, email, automation, and AI features. It helps sales teams manage leads, contacts, opportunities, activities, and reporting in one system.
Close exposes a REST API and a remote MCP server; both require authentication, with the REST API supporting API key or OAuth 2.0 and the MCP server supporting MCP OAuth or API-key headers.
- Close MCP Serverdetected
- Close REST APIdiscovered
In the Close app, open API settings and create or copy an API key. The REST API docs say to send the API key with HTTP Basic Auth, using the API key as the username and an empty password. The MCP docs show the same key can also be sent in the Close-API-Key header.
Point your MCP client at the server URL and approve access in the browser. The server supports OAuth Dynamic Client Registration (RFC 7591), so the client registers itself automatically — no developer-portal app, client_id, or client_secret to create.
conventions · 3/7 published
- integrations.json——
- llms.txt✓https://close.com/llms.txt
- API catalog✓https://close.com/.well-known/api-catalog
- OpenAPI document✗
/api/schema/, /openapi.json, /swagger.json, /api/openapi.json, or /v1/openapi.json - MCP server card✗
/.well-known/mcp/server-card.json - OAuth protected resource✓https://close.com/.well-known/oauth-protected-resource
- Agent card✗
/.well-known/agent-card.json - Agent skills✗
/.well-known/agent-skills/index.json
Publish these signals → /publishing