---
title: "MCP Quickstart"
description: "Connect Claude Desktop to WorldMonitor and make your first real intelligence call in five minutes."
---

WorldMonitor exposes 39 live tools — markets, conflict events, maritime chokepoints, aviation, climate, AI briefs — over the [Model Context Protocol](https://modelcontextprotocol.io). This page is the shortest path from zero to a useful response inside Claude. Everything else in the [MCP Server reference](/mcp-overview) is optional reading once this works.

## 1. Pick a tier and grab credentials

Free accounts can't reach the MCP server — the OAuth flow returns `401 INSUFFICIENT_TIER`. You need one of:

- **Pro** — sign in with your WorldMonitor account, no key to manage. 50 quota-consuming calls per UTC day.
- **API Starter / Business / Enterprise** — paste a user-issued `wm_…` key in your client, or use the same OAuth flow as Pro. `wm_…` MCP calls are throttled at 60 requests/minute/key in this handler; REST/API plan allowances are separate from the Pro/OAuth MCP daily counter.

Upgrade or generate a key at [worldmonitor.app/pro](https://www.worldmonitor.app/pro). The rest of this guide assumes Claude Desktop + OAuth (the simplest path); if you'd rather paste a `wm_…` key into a `curl` script, jump to [Server-side curl](#server-side-curl) at the bottom.

## 2. Add the server to Claude Desktop

Edit `~/Library/Application Support/Claude/claude_desktop_config.json` (macOS) or the Windows equivalent at `%APPDATA%\Claude\claude_desktop_config.json` and add the `worldmonitor` entry:

```json
{
  "mcpServers": {
    "worldmonitor": {
      "url": "https://worldmonitor.app/mcp"
    }
  }
}
```

Restart Claude Desktop. The first time you mention WorldMonitor in a chat, Claude pops the OAuth consent screen — click **Sign in with WorldMonitor Pro**, authenticate in your browser, and the token is stored locally by Claude. No API key ever touches your filesystem.

<Tip>
Cursor, Claude web, and MCP Inspector use the same URL. See [client setup](/mcp-overview#client-setup) for the exact config field per client.
</Tip>

## 3. Ask your first question

Open a new chat in Claude Desktop and try:

> _What's the current US equity market sentiment and which sectors are leading or lagging today?_

Claude will pick `get_market_data` from the WorldMonitor toolset, call it with no arguments, and answer in plain English. The raw tool response is a single bootstrap bundle covering quotes, sector ETFs, crypto, gulf quotes, ETF flows, and the WorldMonitor fear-greed composite. Because cache tools default-cap list/map fields at 30 items when `limit` is omitted, this first response is intentionally compact; pass `limit: 0` only when you genuinely need the full 200+ quote / ~100 KB market bundle. Typical latency: **300–800 ms** (cache read from Redis, no upstream API call).

Behind the scenes, the tool call looks like this:

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": { "name": "get_market_data", "arguments": {} }
}
```

And the response is a standard MCP content block — a single text block whose `text` field is the JSON payload:

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "content": [
      { "type": "text", "text": "{\"cached_at\":\"2026-05-17T10:34:00.852Z\",\"stale\":false,\"data\":{\"stocks-bootstrap\":{...},\"sectors\":{...},\"fear-greed\":{...}}}" }
    ],
    "isError": false
  }
}
```

Two payload-level fields you'll see on every cache tool:

- `cached_at` — ISO timestamp of the oldest contributing data point. Use this to reason about how fresh the answer is.
- `stale` — `true` when any contributing seed exceeded its freshness budget. Tells the model when to caveat its answer.

## 4. Trim the response (when it matters)

Broad cache calls can still be large even with their default list caps. That's fine for one call, but if you're chaining several reads inside a longer conversation, you'll burn context fast. Every tool accepts an optional `jmespath` argument that projects the response server-side **before** it crosses the wire:

```json
{
  "name": "get_market_data",
  "arguments": {
    "jmespath": "data.\"stocks-bootstrap\".quotes[?symbol=='AAPL' || symbol=='MSFT'].{s:symbol,p:price,chg:change}"
  }
}
```

Same call, ~120 bytes of response instead of the broader default-capped market bundle. JMESPath cuts payload by **80–95%** for typical projections. If you disable the default cap with `limit: 0`, projection becomes even more important because `get_market_data` can return the full 200+ quote / ~100 KB bundle.

Don't try to memorise the grammar from scratch — head to the [JMESPath guide](/mcp-jmespath) for the 12 worked examples covering filters, projections, multiselect-hash, and the rest of the slices you'll actually use.

## 5. Browse the full tool catalog

`get_market_data` is one of 39 tools. The rest cover:

- **Geopolitical & security** — `get_conflict_events`, `get_country_risk`, `get_military_posture`, `get_cyber_threats`, `get_sanctions_data`, `get_news_intelligence`.
- **Movement & infrastructure** — `get_chokepoint_status`, `get_maritime_activity`, `get_airspace`, `get_aviation_status`, `search_flights`.
- **Energy & macro** — `get_energy_intelligence`, `get_economic_data`, `get_country_macro`, `get_tariff_trends`, `get_eu_housing_cycle`, `get_eu_quarterly_gov_debt`, `get_eu_industrial_production`.
- **Environment & health** — `get_climate_data`, `get_natural_disasters`, `get_radiation_data`, `get_health_signals`.
- **AI synthesis** (live LLM, slower — 1–4 s) — `get_world_brief`, `get_country_brief`, `analyze_situation`, `generate_forecasts`.

Full per-tool parameters, freshness budgets, and `curl` examples are in the [MCP Tools Reference](/mcp-tools-reference). When the compressed `tools/list` description is ambiguous about a specific tool, call `describe_tool` with `tool_name: "<name>"` for the full uncompressed definition — it's exempt from the Pro daily quota, so use it freely while exploring.

## What just happened

The MCP handshake is invisible from the chat side, but here's the sequence so you know where to look if something breaks:

1. Claude Desktop reads `claude_desktop_config.json`, sees the WorldMonitor server, and on first use POSTs `initialize` to `https://worldmonitor.app/mcp`. The server responds with its capabilities, the negotiated protocol version (default `2025-06-18`, matching the static server card; clients pinned to `2025-03-26` still get `2025-03-26`), and a session-level `instructions` string that tells the model about the universal `jmespath` argument. Clients that advertise `text/event-stream` may receive this response as SSE with a resumable `Mcp-Session-Id` / `Last-Event-ID` cursor; clients that do not advertise SSE receive JSON. See [protocol negotiation](/mcp-overview#protocol-negotiation) and [Streamable HTTP responses](/mcp-overview#streamable-http-responses) for the rollout details.
2. Claude Desktop calls `tools/list` and receives 39 compressed tool descriptions (`≤120` bytes per tool). The compressed form keeps `tools/list` cheap; `describe_tool` returns the full definition on demand.
3. When you ask a question that needs live data, Claude picks a tool, calls `tools/call`, and inlines the response into its reply. Cache tools return in under a second; LLM-backed tools (`get_world_brief`, `analyze_situation`, etc.) take 1–4 s.

## Server-side curl

If you'd rather skip the OAuth dance and drive MCP from a script:

```bash
export WM_KEY="wm_0123456789abcdef0123456789abcdef01234567"  # API Starter+ key from worldmonitor.app/settings

# 1. List tools (compressed descriptions)
curl -s https://worldmonitor.app/mcp \
  -H "X-WorldMonitor-Key: $WM_KEY" \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'

# 2. Call a cache tool
curl -s https://worldmonitor.app/mcp \
  -H "X-WorldMonitor-Key: $WM_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc":"2.0","id":2,
    "method":"tools/call",
    "params":{"name":"get_market_data","arguments":{}}
  }'

# 3. Same call with a JMESPath projection (much smaller response).
# Heredoc keeps the single-quoted JMESPath string literals readable —
# wrapping the JSON in -d '...' would collide with the inner quotes.
curl -s https://worldmonitor.app/mcp \
  -H "X-WorldMonitor-Key: $WM_KEY" \
  -H 'Content-Type: application/json' \
  --data-binary @- <<'EOF'
{
  "jsonrpc":"2.0","id":3,
  "method":"tools/call",
  "params":{
    "name":"get_market_data",
    "arguments":{
      "jmespath":"data.\"stocks-bootstrap\".quotes[?symbol=='AAPL' || symbol=='MSFT'].{s:symbol,p:price}"
    }
  }
}
EOF
```

The `wm_…` user API key goes in `X-WorldMonitor-Key`, **not** as a `Bearer` token — sending it as a bearer fails OAuth resolution and returns `401 invalid_token`. If you already have an OAuth access token from `/api/oauth/token`, use `Authorization: Bearer $TOKEN` instead and drop the `X-WorldMonitor-Key` header.

## Where to go next

- **[JMESPath guide](/mcp-jmespath)** — projection grammar with 12 worked examples against real response shapes. Read this before your second day of MCP use; it will pay for itself in saved tokens within an hour.
- **[MCP Tools Reference](/mcp-tools-reference)** — per-tool parameters, freshness budgets, API endpoint mapping, and `curl` examples for every tool.
- **[MCP Server reference](/mcp-overview)** — auth modes, OAuth setup, plans & quotas, error codes, and freshness model.
- **[Command-line client](/cli)** — prefer a shell? `npx worldmonitor tools` drives the same tools from your terminal or a script, no integration to write.
- **[Official SDKs](/sdks)** — prefer a library? Zero-dependency clients for Python (`pip install worldmonitor-sdk`), Ruby (`gem install worldmonitor`), and Go (`go get github.com/koala73/worldmonitor/sdk/go`) call the same tools with language-native helpers.
- **[Authentication overview](/authentication)** — when to use an API key in `X-WorldMonitor-Key` vs. OAuth vs. browser session.

## Operational note (for ops, not callers)

Every `tools/call` emits a structured telemetry line tagged `mcp.toolcall` with latency, payload bytes (pre and post JMESPath), `jmespath_used`, and `budget_exceeded`. `initialize` emits `mcp.tools_list_emitted` with tool-count and tools-list byte metrics. Pipe Vercel / log-drain consumers at these lines if you want real P95 and payload-size tracking. Caller-facing behaviour is unaffected.
