# earthquake-mcp-server [Health: Active]
**Category:** 💻 Developer Tools
**Repository:** https://github.com/cyanheads/earthquake-mcp-server
**GitHub Stars:** 1
**Views:** 0
**Installs:** 0
**Upvotes:** 0
**Directory Page:** https://allmcps.com/mcp/earthquake-mcp-server
## Description
Search USGS and EMSC seismic data — real-time feeds, event queries, and earthquake counts.
## Claude Desktop Quick Installation
Install path detected from listing signals. Uses `bunx` (confidence: high):
```json
"mcpServers": {
"earthquake-mcp-server": {
"command": "bunx",
"args": ["@cyanheads/earthquake-mcp-server@latest"]
}
}
```
## Documentation & README
@cyanheads/earthquake-mcp-server
Search USGS and EMSC seismic data — real-time feeds, event queries, and earthquake counts via MCP. STDIO or Streamable HTTP.
4 Tools • 2 Resources
[](./CHANGELOG.md) [](./LICENSE) [](https://github.com/users/cyanheads/packages/container/package/earthquake-mcp-server) [](https://modelcontextprotocol.io/) [](https://www.npmjs.com/package/@cyanheads/earthquake-mcp-server) [](https://www.typescriptlang.org/) [](https://bun.sh/)
[](https://github.com/cyanheads/earthquake-mcp-server/releases/latest/download/earthquake-mcp-server.mcpb) [](https://cursor.com/en/install-mcp?name=earthquake-mcp-server&config=eyJjb21tYW5kIjoibnB4IiwiYXJncyI6WyIteSIsIkBjeWFuaGVhZHMvZWFydGhxdWFrZS1tY3Atc2VydmVyIl19) [](https://vscode.dev/redirect?url=vscode:mcp/install?%7B%22name%22%3A%22earthquake-mcp-server%22%2C%22command%22%3A%22npx%22%2C%22args%22%3A%5B%22-y%22%2C%22%40cyanheads%2Fearthquake-mcp-server%22%5D%7D)
[](https://www.npmjs.com/package/@cyanheads/mcp-ts-core)
**Public Hosted Server:** [https://earthquake.caseyjhand.com/mcp](https://earthquake.caseyjhand.com/mcp)
---
## Tools
4 tools for querying global earthquake data from USGS and EMSC:
| 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 |
### `earthquake_get_feed`
Fetch a USGS pre-computed real-time earthquake feed by magnitude tier and time window.
- CDN-cached by USGS — faster and more available than the FDSN query API
- Five magnitude tiers: `all` (microseisms), `1.0`, `2.5`, `4.5`, and `significant` (USGS-curated by magnitude, felt reports, and PAGER impact)
- Four time windows: `hour`, `day`, `week`, `month`
- Returns event list with counts and the source feed URL
- Paged with an opaque `cursor`: `limit` bounds a page (default 100, max 1000), `totalCount` reports the whole feed, and `nextCursor` retrieves the rest — the broad tiers run past 10,000 events for `month`
- The cursor is opaque because these feeds have no upstream paging parameter and USGS regenerates them about once a minute; a numeric offset across two calls would skip or repeat events
- Best for real-time "what's happening now" queries; use `earthquake_search` for historical or filtered queries
---
### `earthquake_search`
Search earthquakes by time range, magnitude, depth, location radius, PAGER alert level, or felt reports.
- Dual-source: USGS (global, richer metadata) or EMSC (an independent global catalog from the European-Mediterranean Seismological Centre, for cross-verification anywhere)
- Full FDSN ComCat query API parameters: time range, magnitude, depth, location radius
- USGS-specific filters: PAGER alert level (`green`/`yellow`/`orange`/`red`), DYFI felt reports count, significance score, event type
- Every event carries an `event_type` in one vocabulary whichever source served it — the QuakeML names USGS publishes (`earthquake`, `quarry blast`, `explosion`, `ice quake`); EMSC's two-character code is decoded to the same names, with how sure EMSC was kept beside it in `event_certainty` — and the `event_type` filter narrows to one of them on USGS
- Location-based queries: provide `latitude`, `longitude`, and `radius_km` together
- Rectangular study areas: `min_latitude`, `max_latitude`, `min_longitude`, `max_longitude`, each independently optional and forwarded to both sources; combining a box with the radius circle intersects the two. Longitude accepts up to ±360 so a box can cross the antimeridian
- Sort by time (newest first) or magnitude (largest first), ascending or descending
- One call returns at most 20,000 events; page beyond that with `offset`, forwarded straight to the upstream FDSN `offset` parameter on both sources
- `offset` counts from 1, matching both upstream APIs — a capped result carries `totalCount` and the `nextOffset` to pass on the following call, and says so with `countUnavailable` when the follow-up count query failed rather than leaving the total silently absent
- Use `earthquake_count` first to gauge result size
- USGS-specific filters are not supported by EMSC — when `source=emsc` they are dropped and named in `ignoredFilters`, so an unconstrained result set is never mistaken for a filtered one
---
### `earthquake_count`
Count earthquakes matching filters without fetching full records.
- Lightweight alternative to `earthquake_search` for statistical queries ("how many M5+ events in 2025?")
- Same filter surface as `earthquake_search`: time, magnitude, depth, location radius, bounding box, PAGER, DYFI, significance, event type
- A radius over a mining region counts quarry blasts alongside earthquakes — pass `event_type="earthquake"` on USGS to exclude them
- Returns `exceeds_limit` flag when count exceeds 20,000 — signals a full search needs paging
- Echoes the effective query back as `queryEcho`, including the resolved time window — omitting `start_time` counts only the last 30 days
- USGS returns the `max_allowed` cap (20,000); EMSC count endpoint does not expose this field (`max_allowed` will be null)
- USGS-specific filters are dropped and named in `ignoredFilters` when `source=emsc`, the same as on `earthquake_search`
---
### `earthquake_get_event`
Fetch complete detail for a specific earthquake by USGS event ID.
- Returns the normalized event a search result already carries, plus `detail` — a projection of the analysis products only the single-event response holds
- `detail` groups: PAGER alert and report link, ShakeMap peak MMI/PGA/PGV and intensity map, DYFI response count and max CDI, moment-tensor scalar moment and nodal planes, landslide and liquefaction alerts, origin quality (azimuthal gap, station count, location and depth uncertainty), finite-fault rupture length and width
- A group is omitted when USGS produced no such product — a small automatic event usually has none, a large reviewed one has most of them
- Event IDs appear in the `id` field of `earthquake_get_feed` and `earthquake_search` results (e.g. `us6000sznj`, `hv74966427`)
- USGS-only — EMSC events have no per-event detail endpoint
## Resources
| Type | URI pattern | Description |
|:---|:---|:---|
| Resource | `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 |
| Resource | `earthquake://event/{event_id}` | Full USGS earthquake event detail by ID as injectable context, including the same `detail` product projection as `earthquake_get_event` |
## Features
Built on [`@cyanheads/mcp-ts-core`](https://github.com/cyanheads/mcp-ts-core):
- Declarative tool definitions — single file per tool, framework handles registration and validation
- Unified error handling across all tools
- Pluggable auth (`none`, `jwt`, `oauth`)
- Swappable storage backends: `in-memory`, `filesystem`, `Supabase`, `Cloudflare KV/R2/D1`
- Structured logging with optional OpenTelemetry tracing
- Runs locally (stdio/HTTP) or on Cloudflare Workers from the same codebase
Earthquake-specific:
- Two independent global data sources: USGS ComCat (full metadata) and EMSC SeismicPortal (an independent catalog from the European-Mediterranean Seismological Centre, with no PAGER/DYFI/ShakeMap metadata and station coverage densest around Europe and the Mediterranean)
- USGS real-time GeoJSON feeds (CDN-cached, fast availability) plus FDSN event query API
- EMSC FDSN-WS event and count endpoints
- No API key required — both USGS and EMSC are fully public
Agent-friendly output:
- Source attribution on every response (`usgs` / `emsc`) so agents can reason about data provenance
- `exceeds_limit` flag on count responses surfaces truncation risk before a full search
- Fields a source does not publish come back `null`, never as a fabricated zero — `tsunami` and `status` are null on EMSC events, and the rendered text says "not published by source" rather than "no tsunami" or "reviewed"
- `source_catalog` and `auth` carry provenance (which catalog and which authoritative agency produced a solution) so agents can weigh two sources against each other
- USGS-only filters dropped for an EMSC query are named in `ignoredFilters` on both `earthquake_search` and `earthquake_count`
- An upstream rejection surfaces the service's own explanation (the offending parameter and its accepted format) in the error message, not just a status code; when the service explains nothing, the error says so under its own reason rather than passing the raw upstream body through
- `event_type` travels with every event, so a quarry blast or explosion is never silently read as an earthquake, and `event_certainty` keeps a suspected one from reading as confirmed
## 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 Streamable HTTP, set the transport and start the server:
```sh
MCP_TRANSPORT_TYPE=http MCP_HTTP_PORT=3010 bun run start:http
# Server listens at http://localhost:3010/mcp
```
### Prerequisites
- [Bun v1.3.0](https://bun.sh/) or higher.
- No API keys required — USGS and EMSC data is fully public.
### Installation
1. **Clone the repository:**
```sh
git clone https://github.com/cyanheads/earthquake-mcp-server.git
```
2. **Navigate into the directory:**
```sh
cd earthquake-mcp-server
```
3. **Install dependencies:**
```sh
bun install
```
## Configuration
All configuration is validated at startup via Zod schemas in `src/config/server-config.ts`. Key environment variables:
| Variable | Description | Default |
|:---|:---|:---|
| `MCP_TRANSPORT_TYPE` | Transport: `stdio` or `http` | `stdio` |
| `MCP_HTTP_PORT` | HTTP server port | `3010` |
| `MCP_HTTP_ENDPOINT_PATH` | HTTP endpoint path where the MCP server is mounted | `/mcp` |
| `MCP_PUBLIC_URL` | Public origin override for TLS-terminating reverse-proxy deployments | none |
| `MCP_SESSION_MODE` | HTTP session handling: `stateful`, `stateless`, or `auto`. The Docker image and `.env.example` ship `stateless`. | `auto` (resolves to `stateful`) |
| `MCP_AUTH_MODE` | Authentication: `none`, `jwt`, or `oauth` | `none` |
| `MCP_LOG_LEVEL` | Log level (`debug`, `info`, `warning`, `error`, etc.) | `info` |
| `MCP_GC_PRESSURE_INTERVAL_MS` | Opt-in Bun-only forced-GC pressure loop (ms). Try `60000` if heap growth is observed under sustained HTTP load. | `0` (disabled) |
| `LOGS_DIR` | Directory for log files (Node.js only) | `/logs` |
| `STORAGE_PROVIDER_TYPE` | Storage backend: `in-memory`, `filesystem`, `supabase`, `cloudflare-kv/r2/d1` | `in-memory` |
| `USGS_BASE_URL` | USGS API base URL. Override for testing or mirroring. | `https://earthquake.usgs.gov` |
| `EMSC_BASE_URL` | EMSC API base URL. Override for testing or mirroring. | `https://www.seismicportal.eu` |
| `DEFAULT_LIMIT` | Default result limit for `earthquake_search` | `100` |
| `REQUEST_TIMEOUT_MS` | HTTP timeout in milliseconds for upstream API calls | `10000` |
| `OTEL_ENABLED` | Enable OpenTelemetry | `false` |
## Running the server
### Local development
- **Build and run the production version**:
```sh
# One-time build
bun run rebuild
# Run the built server
bun run start:http
# or
bun run start:stdio
```
- **Run checks and tests**:
```sh
bun run devcheck # Lints, formats, type-checks, and more
bun run test # Runs the test suite
```
## Project structure
| Directory | Purpose |
|:---|:---|
| `src/mcp-server/tools` | Tool definitions (`*.tool.ts`). Four tools across USGS and EMSC. |
| `src/mcp-server/resources` | Resource definitions. Feed and event resources. |
| `src/services/usgs` | USGS ComCat service — GeoJSON feed fetcher and FDSN query API client. |
| `src/services/emsc` | EMSC SeismicPortal service — FDSN event search and count endpoints. |
| `src/config` | Server-specific environment variable parsing and validation with Zod. |
| `tests/` | Unit and integration tests, mirroring the `src/` structure. |
## Development guide
See [`CLAUDE.md`](https://github.com/cyanheads/earthquake-mcp-server/blob/HEAD/CLAUDE.md) for development guidelines and architectural rules. The short version:
- Handlers throw, framework catches — no `try/catch` in tool logic
- Use `ctx.log` for logging, `ctx.state` for storage
- Register new tools and resources in the `createApp()` arrays
## Contributing
Issues and pull requests are welcome. Run checks and tests before submitting:
```sh
bun run devcheck
bun run test
```
## License
This project is licensed under the Apache 2.0 License. See the [LICENSE](https://github.com/cyanheads/earthquake-mcp-server/blob/HEAD/LICENSE) file for details.