How do I get my Arcsecond.io API Key?

Log in to your Arcsecond.io account and go to your **Profile** page. You will find your Personal API Key there.

What is an observatory subdomain?

If you are part of a specific observatory or organization on Arcsecond.io, your data is hosted on a subdomain (e.g., `myobs.arcsecond.io`). You can use this subdomain to access site-specific data.

Can I search for any astronomical object?

Yes, the `search_objects` tool allows you to search across millions of objects in the SIMBAD, Gaia, and other astronomical databases integrated into Arcsecond.io.

Arcsecond.io MCP Server for Cursor 7 tools — connect in under 2 minutes

Name: Arcsecond.io
Availability: InStock
Author: Vinkius

docs.cursor.com/context/model-context-protocol

Built by Vinkius GDPR 7 Tools IDE

Cursor is an AI-first code editor built on VS Code that integrates LLM-powered coding assistance directly into the development workflow. Its Agent mode enables autonomous multi-step coding tasks, and MCP support lets agents access external data sources and APIs during code generation.

Get MCP Server for AI Agents

ASK AI ABOUT THIS MCP SERVER

Open in ChatGPT Open in Claude Open in Perplexity

Vinkius supports streamable HTTP and SSE.

RecommendedModern Approach — Zero Configuration

Vinkius Desktop App

The modern way to manage MCP Servers — no config files, no terminal commands. Install Arcsecond.io and 2,500+ MCP Servers from a single visual interface.

Download Free Open SourceNo signup required

Classic Setup·json

{
  "mcpServers": {
    "arcsecondio": {
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

Fully ManagedVinkius Servers

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High SecurityEnterprise-grade

IAMAccess control

EU AI ActCompliant

DLPData protection

V8 IsolateSandboxed

Ed25519Audit chain

<40msKill switch

Stream every event to Splunk, Datadog, or your own webhook in real-time

* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure

About Arcsecond.io MCP Server

The Arcsecond.io MCP Server provides a unified natural language interface to the world's astronomical data. Connect your Arcsecond account to your AI agent to search for celestial objects, manage observatory data, and track observation night logs seamlessly.

Cursor's Agent mode turns Arcsecond.io into an in-editor superpower. Ask Cursor to generate code using live data from Arcsecond.io and it fetches, processes, and writes — all in a single agentic loop. 7 tools appear alongside file editing and terminal access, creating a unified development environment grounded in real-time information.

Key Features

Celestial Object Search — Search for stars, galaxies, planets, and more to retrieve official names, types, and precise coordinates (RA/Dec).
Object Metadata — Access detailed astrophysical data, including visual magnitude and classifications for millions of objects.
Observatory Management — List observing sites, telescopes, and instruments associated with your observatory subdomain.
Data Tracking — Access datasets and night logs to monitor ongoing observations and historical data collections.
Night Log Oversight — Retrieve detailed logs of observations and calibrations organized by local noon-to-noon cycles.
Global Data Access — Interface with a vast network of astronomical databases through a single, consistent API.

The Arcsecond.io MCP Server exposes 7 tools through the Vinkius. Connect it to Cursor in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

How to Connect Arcsecond.io to Cursor via MCP

Follow these steps to integrate the Arcsecond.io MCP Server with Cursor.

Open MCP Settings

Press Cmd+Shift+P (macOS) or Ctrl+Shift+P (Windows/Linux) → search "MCP Settings"

Add the server config

Paste the JSON configuration above into the mcp.json file that opens

Save the file

Cursor will automatically detect the new MCP server

Start using Arcsecond.io

Open Agent mode in chat and ask: "Using Arcsecond.io, help me..." — 7 tools available

Why Use Cursor with the Arcsecond.io MCP Server

Cursor AI Code Editor provides unique advantages when paired with Arcsecond.io through the Model Context Protocol.

Agent mode turns Cursor into an autonomous coding assistant that can read files, run commands, and call MCP tools without switching context

Cursor's Composer feature can generate entire files using real-time data fetched through MCP — no copy-pasting from external dashboards

MCP tools appear alongside built-in tools like file reading and terminal access, creating a unified agentic environment

VS Code extension compatibility means your existing workflow, keybindings, and extensions all work alongside MCP tools

Arcsecond.io + Cursor Use Cases

Practical scenarios where Cursor combined with the Arcsecond.io MCP Server delivers measurable value.

Code generation with live data: ask Cursor to generate a security report module using live DNS and subdomain data fetched through MCP

Automated documentation: have Cursor query your API's tool schemas and generate TypeScript interfaces or OpenAPI specs automatically

Infrastructure-as-code: Cursor can fetch domain configurations and generate corresponding Terraform or CloudFormation templates

Test scaffolding: ask Cursor to pull real API responses via MCP and generate unit test fixtures from actual data

Arcsecond.io MCP Tools for Cursor (7)

These 7 tools become available when you connect Arcsecond.io to Cursor via MCP:

get_account_check

Verify Arcsecond account connection

get_object

Get details for a specific astronomical object

list_datasets

List datasets available for an observatory

list_night_logs

List observation night logs for an observatory

list_observing_sites

List observing sites for an observatory

list_telescopes

List telescopes for an observatory

search_objects

Search for astronomical objects (stars, galaxies, planets)

Example Prompts for Arcsecond.io in Cursor

Ready-to-use prompts you can give your Cursor agent to start working with Arcsecond.io immediately.

"Search for the 'Andromeda Galaxy' and get its coordinates."

"List all observing sites for the 'lco' observatory."

"Show me recent night logs for subdomain 'my-observatory'."

Troubleshooting Arcsecond.io MCP Server with Cursor

Common issues when connecting Arcsecond.io to Cursor through the Vinkius, and how to resolve them.

Tools not appearing in Cursor

Ensure you are in Agent mode (not Ask mode). MCP tools only work in Agent mode.

Server shows as disconnected

Check Settings → Features → MCP and verify the server status. Try clicking the refresh button.

Arcsecond.io + Cursor FAQ

Common questions about integrating Arcsecond.io MCP Server with Cursor.

What is Agent mode and why does it matter for MCP?

Agent mode is Cursor's autonomous execution mode where the AI can perform multi-step tasks: reading files, editing code, running terminal commands, and calling MCP tools. Without Agent mode, Cursor operates in a simpler ask-and-answer mode that doesn't support tool calling. Always ensure you're in Agent mode when working with MCP servers.

Where does Cursor store MCP configuration?

Cursor looks for MCP server configurations in a mcp.json file. You can configure servers at the project level (.cursor/mcp.json in your project root) or globally (~/.cursor/mcp.json). Project-level configs take precedence.

Can Cursor use MCP tools in inline edits?

No. MCP tools are only available in Agent mode through the chat panel. Inline completions and Tab suggestions do not trigger MCP tool calls. This is by design — tool calls require user visibility and approval.

How do I verify MCP tools are loaded?

Open Settings → Features → MCP and look for your server name. A green indicator means the server is connected. You can also check Agent mode's available tools by clicking the tools dropdown in the chat panel.