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io.github.kozmos-tech/contactapi

Official registry Other

An open-source API for collecting and managing contacts and signups.

Source code Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

NPM package @kozmos-tech/contactapi
Claude Code 
claude mcp add contactapi -- npx -y @kozmos-tech/contactapi@0.1.1
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "contactapi": {
            "command": "npx",
            "args": [
                "-y",
                "@kozmos-tech/contactapi@0.1.1"
            ]
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. contactapi
  2. API overview
  3. MCP server
  4. Development
  5. Build
  6. Deploy
  7. License

contactapi

An open-source API to save contacts. Send a POST with an email and any other JSON fields you want, and they get saved as-is. Manage them with simple CRUD.

Built with Hono and deployed on Vercel.

API overview

The base URL is https://contactapi.dev and every request carries your API key as a Bearer token:

Authorization: Bearer YOUR_KEY
MethodPathKeyDescription
POST/v1/contactssecret or publishableCreate (or upsert) a contact by email
GET/v1/contactssecretList contacts, paginated
GET/v1/contacts/:idsecretFetch a single contact
PATCH/v1/contacts/:idsecretUpdate a contact
DELETE/v1/contacts/:idsecretDelete a contact

Contacts are keyed by email — creating one whose email already exists updates it in place rather than duplicating it. Full reference lives on the landing page and in /llms.txt.

There are two kinds of key:

  • ck_secret_… — secret key, for your backend. Full access to every endpoint.
  • ck_pub_… — publishable key, for the browser. Can only create contacts and is locked to your domains.

MCP server

AI clients (Claude Desktop, claude.ai custom connectors, Cursor, the MCP Inspector) can manage your contacts through an MCP server at:

https://contactapi.dev/mcp

Auth is OAuth 2.1 with dynamic client registration — point a client at the URL and it discovers the authorization server, registers itself, and sends you to log in and approve access; no API key to copy. The server exposes five tools that mirror the REST API: list_contacts, get_contact, create_contact (upsert-by-email), update_contact, and delete_contact. Everything is scoped to the account you log in as.

The OAuth provider is Better Auth's mcp plugin (src/auth.ts); the tools and endpoint wiring live in src/mcp/server.ts and src/index.ts.

Development

Prerequisites: Vercel CLI installed globally.

npm install
vc dev
open http://localhost:3000

Build

npm install
vc build

Deploy

npm install
vc deploy

License

MIT

Frequently asked questions

What is io.github.kozmos-tech/contactapi?

An open-source API for collecting and managing contacts and signups.

How do I install io.github.kozmos-tech/contactapi?

It runs on your machine. In Claude Code: claude mcp add contactapi -- npx -y @kozmos-tech/contactapi@0.1.1. For other clients, paste the JSON configuration from this page into their MCP settings.

Does io.github.kozmos-tech/contactapi need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is io.github.kozmos-tech/contactapi open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains io.github.kozmos-tech/contactapi?

It is published by kozmos-tech. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.