earthquake-mcp-server

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  <h1>@cyanheads/earthquake-mcp-server</h1>
  <p><b>Search USGS and EMSC seismic data — real-time feeds, event queries, and earthquake counts via MCP. STDIO or Streamable HTTP.</b>
  <div>4 Tools • 2 Resources</div>
  </p>
</div>

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**Public Hosted Server:** [https://earthquake.caseyjhand.com/mcp](https://earthquake.caseyjhand.com/mcp)

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---

## Overview

Seismic data from USGS ComCat and the EMSC SeismicPortal. Fetch real-time earthquake feeds, search and count seismic events by time, magnitude, depth, and location, and pull full analysis detail for a single event. Runs as a stdio process, a local Streamable HTTP server, or the public hosted endpoint above.

### Tools

| Tool | Description |
|:---|:---|
| `earthquake_get_feed` | Fetch a USGS pre-computed real-time earthquake feed by magnitude tier and time window |
| `earthquake_search` | Search earthquakes by time range, magnitude, depth, location radius, PAGER alert level, or felt reports |
| `earthquake_count` | Count earthquakes matching filters without fetching full records |
| `earthquake_get_event` | Fetch complete detail for a specific earthquake by USGS event ID |

### Resources

| Resource | Description |
|:---|:---|
| `earthquake://feed/{magnitude_tier}/{time_window}` | USGS real-time earthquake feed as injectable context — returns the whole feed, so use the `earthquake_get_feed` tool for the broad tiers |
| `earthquake://event/{event_id}` | Full USGS earthquake event detail by ID as injectable context, including the same `detail` product projection as `earthquake_get_event` |

## Capability reference

### `earthquake_get_feed` <sub>tool</sub>

- Choose a magnitude tier (`all`, `1.0`, `2.5`, `4.5`, `significant`) and a window (`hour`, `day`, `week`, `month`). USGS caches these feeds; use `earthquake_search` for historical or filtered queries.
- Returns events, page count, generation time, and source feed URL. `all` includes microseisms; `significant` is USGS-curated using magnitude, felt reports, and PAGER impact.
- `limit` defaults to 100, max 1000. `totalCount` reports the whole feed and `nextCursor` retrieves another page; pass the opaque cursor back unchanged.

---

### `earthquake_search` <sub>tool</sub>

- Search `usgs` or `emsc` by time, magnitude, depth, radius, or bounding box. A radius requires `latitude`, `longitude`, and `radius_km` together; box edges are independently optional, support antimeridian bounds up to ±360°, and intersect a supplied circle.
- Returns normalized events with `event_type` and EMSC's `event_certainty`. `ignoredFilters` names unsupported filters; `queryEcho` reports the effective query.
- Sort by time or magnitude in either direction. `limit` defaults to 100, max 20,000; paging uses a 1-based `offset`. Capped results carry `nextOffset` and `totalCount`, or `countUnavailable` if the count lookup failed. Use `earthquake_count` first to size the match set.

---

### `earthquake_count` <sub>tool</sub>

- Count matches using the same filters as `earthquake_search`, without fetching events. Omit `start_time` for the last 30 days; `queryEcho` reports the resolved window and applied filters.
- `exceeds_limit` flags counts above 20,000. `max_allowed` is 20,000 for USGS and null for EMSC; `ignoredFilters` names filters the source cannot apply.

---

### `earthquake_get_event` <sub>tool</sub>

- Pass a USGS `event_id` from the `id` field of a feed or search result (e.g. `us6000sznj`). EMSC has no per-event detail endpoint.
- Returns the normalized event plus optional `detail`: PAGER, ShakeMap, DYFI, moment tensor, ground-failure alerts, origin quality, and finite-fault dimensions. Groups are omitted when USGS produced no corresponding product.

---

### `earthquake://feed/{magnitude_tier}/{time_window}` <sub>resource</sub>

- Choose the same magnitude tiers and time windows as `earthquake_get_feed`; all 20 combinations are listed as browsable resources.
- Returns the whole feed as `application/json`, with a public 60-second cache hint. Broad week/month feeds can contain thousands of events; use `earthquake_get_feed` for paging.

---

### `earthquake://event/{event_id}` <sub>resource</sub>

- Pass a USGS `event_id` from a feed or search result. Returns the same event and optional `detail` products as `earthquake_get_event`.
- Uses that tool's `not_found`, `source_unavailable`, and `source_timeout` error contract.

## Features

Built on [`@cyanheads/mcp-ts-core`](https://github.com/cyanheads/mcp-ts-core): stdio and Streamable HTTP transports, pluggable auth (`none` / `jwt` / `oauth`), swappable storage (`in-memory`, `filesystem`, `Supabase`, `Cloudflare KV/R2/D1`), structured logging with optional OpenTelemetry tracing.

USGS/EMSC-specific:

- Type-safe clients for the USGS FDSN/GeoJSON API and the EMSC FDSN-WS API, normalizing both into one shared earthquake domain schema
- Automatic retry with backoff and per-request timeouts on every upstream call; detects USGS's rate-limited/CDN failure mode (HTML served instead of GeoJSON) and maps it to a typed service-unavailable error instead of parsing it as data
- EMSC's two-character `evtype` code is decoded against the published event-type/certainty nomenclature into the same vocabulary USGS publishes, so `event_type` carries one meaning across both sources
- USGS-only filters (`alert_level`, `min_felt`, `min_significance`, `event_type`) are named in `ignoredFilters` when `source=emsc`. On USGS, `event_type="earthquake"` excludes quarry blasts and other non-tectonic records.
- No API key or rate-limit tier required — both USGS and EMSC are fully public, keyless APIs

Agent-friendly output:

- Provenance — `source: "usgs" | "emsc"` on every response, plus `source_catalog`/`auth` fields naming the catalog and authoritative agency, so agents can weigh two independent solutions against each other
- Discriminated output contracts — `event_type` and `event_certainty` travel with every event so a quarry blast or a suspected explosion is never silently read as a confirmed earthquake; `exceeds_limit`, `countUnavailable`, and `truncated` flags let callers branch on data instead of parsing prose
- Response shaping — fields a source does not publish come back `null`, never a fabricated zero (`tsunami`, `status`, and `mmi` are always null on EMSC events); USGS-only filters dropped for an EMSC query are named in `ignoredFilters` rather than silently ignored
- Graceful degradation — an upstream rejection surfaces the service's own explanation (offending parameter, accepted format) in the error message instead of a bare status code, and a failed follow-up count degrades to `countUnavailable` rather than failing the whole search

## Getting started

### Public Hosted Instance

A public instance is available at `https://earthquake.caseyjhand.com/mcp` — no installation required. Point any MCP client at it via Streamable HTTP:

```json
{
  "mcpServers": {
    "earthquake-mcp-server": {
      "type": "streamable-http",
      "url": "https://earthquake.caseyjhand.com/mcp"
    }
  }
}
```

### Self-Hosted / Local

Add the following to your MCP client configuration file.

```json
{
  "mcpServers": {
    "earthquake-mcp-server": {
      "type": "stdio",
      "command": "bunx",
      "args": ["@cyanheads/earthquake-mcp-server@latest"],
      "env": {
        "MCP_TRANSPORT_TYPE": "stdio",
        "MCP_LOG_LEVEL": "info"
      }
    }
  }
}
```

Or with npx (no Bun required):

```json
{
  "mcpServers": {
    "earthquake-mcp-server": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "@cyanheads/earthquake-mcp-server@latest"],
      "env": {
        "MCP_TRANSPORT_TYPE": "stdio",
        "MCP_LOG_LEVEL": "info"
      }
    }
  }
}
```

Or with Docker:

```json
{
  "mcpServers": {
    "earthquake-mcp-server": {
      "type": "stdio",
      "command": "docker",
      "args": ["run", "-i", "--rm", "-e", "MCP_TRANSPORT_TYPE=stdio", "ghcr.io/cyanheads/earthquake-mcp-server:latest"]
    }
  }
}
```

For Streamab