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contactapi

contactapi

Local
github.com/kozmos-techBusiness & Marketing1Updated 15w ago
Repository

About contactapi

contactapi is an open-source API for collecting and managing email-keyed contacts, with simple CRUD operations and optional JSON fields. It also offers an MCP endpoint where authenticated AI clients can manage contacts within the signed-in account.

Key features

  1. 01Create or upsert contacts by email
  2. 02List contacts with pagination
  3. 03Fetch, update, and delete contacts
  4. 04Publishable browser keys restricted to domains
  5. 05OAuth 2.1 MCP access with dynamic registration

Use cases

  1. 01Collect signups from a website form
  2. 02Update or remove an existing contact
  3. 03Let an AI client manage account contacts
  4. 04Integrate contact management through the REST API

MCP support

The MCP server exposes tools to list, retrieve, create, update, and delete contacts. Clients authenticate through OAuth 2.1 with dynamic registration, and access is scoped to the approved account.

Configuration

Local server config is the same for every client. Copy it into your client’s MCP config file.

mcp.json · Universal config
{
  "mcpServers": {
    "kozmos-tech-contactapi": {
      "command": "npx",
      "args": [
        "-y",
        "@kozmos-tech/contactapi"
      ]
    }
  }
}
Run commandnpx -y @kozmos-tech/contactapi

Local servers need a runtime on your machine (e.g. Node.js 18+). Config file locations differ by client; see your client’s docs.

Packages
npm@kozmos-tech/contactapi0.1.1

Tools

No tool list yet

Local servers expose tools only once running on your machine, and the maintainer has not provided a tool list.

Details

From the project README

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

Comments

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