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@cyanheads/cdc-health-mcp-server

Search and query CDC public health data — mortality, vaccinations, surveillance, behavioral risk (Socrata SODA API) via MCP. STDIO or Streamable HTTP.\n

3 Tools • 2 Resources • 1 Prompt

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\n\n[![Version](https://img.shields.io/badge/Version-0.6.11-blue.svg?style=flat-square)](./CHANGELOG.md) [![License](https://img.shields.io/badge/License-Apache%202.0-orange.svg?style=flat-square)](./LICENSE) [![Docker](https://img.shields.io/badge/Docker-ghcr.io-2496ED?style=flat-square&logo=docker&logoColor=white)](https://github.com/users/cyanheads/packages/container/package/cdc-health-mcp-server) [![MCP SDK](https://img.shields.io/badge/MCP%20SDK-^1.29.0-green.svg?style=flat-square)](https://modelcontextprotocol.io/) [![npm](https://img.shields.io/npm/v/@cyanheads/cdc-health-mcp-server?style=flat-square&logo=npm&logoColor=white)](https://www.npmjs.com/package/@cyanheads/cdc-health-mcp-server) [![TypeScript](https://img.shields.io/badge/TypeScript-^6.0.3-3178C6.svg?style=flat-square)](https://www.typescriptlang.org/) [![Bun](https://img.shields.io/badge/Bun-v1.3.2-blueviolet.svg?style=flat-square)](https://bun.sh/)\n\n

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\n\n[![Install in Claude Desktop](https://img.shields.io/badge/Install_in-Claude_Desktop-D97757?style=for-the-badge&logo=anthropic&logoColor=white)](https://github.com/cyanheads/cdc-health-mcp-server/releases/latest/download/cdc-health-mcp-server.mcpb) [![Install in Cursor](https://cursor.com/deeplink/mcp-install-dark.svg)](https://cursor.com/en/install-mcp?name=cdc-health-mcp-server&config=eyJjb21tYW5kIjoibnB4IiwiYXJncyI6WyIteSIsIkBjeWFuaGVhZHMvY2RjLWhlYWx0aC1tY3Atc2VydmVyIl19) [![Install in VS Code](https://img.shields.io/badge/VS_Code-Install_Server-0098FF?style=for-the-badge&logo=visualstudiocode&logoColor=white)](https://vscode.dev/redirect?url=vscode:mcp/install?%7B%22name%22%3A%22cdc-health-mcp-server%22%2C%22command%22%3A%22npx%22%2C%22args%22%3A%5B%22-y%22%2C%22%40cyanheads/cdc-health-mcp-server%22%5D%7D)\n\n[![Framework](https://img.shields.io/badge/Built%20on-@cyanheads/mcp--ts--core-67E8F9?style=flat-square)](https://www.npmjs.com/package/@cyanheads/mcp-ts-core)\n\n

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\n\n**Public Hosted Server:** [https://cdc.caseyjhand.com/mcp](https://cdc.caseyjhand.com/mcp)\n\n

\n\n---\n\n## Tools\n\nThree tools for discovering and querying CDC public health data:\n\n| Tool | Description |\n|:---|:---|\n| `cdc_discover_datasets` | Search the catalog by keyword, category, or tag. Entry point for all queries. |\n| `cdc_get_dataset_schema` | Fetch column schema, row count, and metadata for a dataset. Essential before writing SoQL queries. |\n| `cdc_query_dataset` | Execute SoQL queries — filter, aggregate, sort, full-text search, and field selection. |\n\n### `cdc_discover_datasets`\n\nSearch the CDC dataset catalog to find relevant datasets.\n\n- Full-text search across dataset names and descriptions\n- Filter by domain category (e.g., \"NNDSS\", \"Vaccinations\", \"Behavioral Risk Factors\")\n- Filter by domain tags (e.g., `[\"covid19\", \"surveillance\"]`)\n- Returns dataset IDs, names, descriptions, column lists, and update timestamps\n- Pagination via offset for browsing large result sets\n\n---\n\n### `cdc_get_dataset_schema`\n\nFetch the full column schema for a specific dataset.\n\n- Column names, data types, and descriptions\n- Row count and last-updated timestamp\n- Essential for understanding column types before writing `$where` clauses\n- Accepts four-by-four dataset identifiers (e.g., `bi63-dtpu`)\n\n---\n\n### `cdc_query_dataset`\n\nExecute SoQL queries against any CDC dataset.\n\n- Full SoQL support: `$select`, `$where`, `$group`, `$having`, `$order`\n- Full-text search across all text columns via `$q`\n- Up to 5,000 rows per request with pagination\n- Returns the assembled SoQL query string for debugging\n- All response values are strings (per SODA v2.1) — parse based on column type metadata\n\n## Resources and prompt\n\n| Type | Name | Description |\n|:---|:---|:---|\n| Resource | `cdc://datasets` | Top 50 datasets by popularity for orientation |\n| Resource | `cdc://datasets/{datasetId}` | Dataset metadata and column schema (equivalent to schema tool) |\n| Prompt | `analyze_health_trend` | Guided 5-step workflow: discover, inspect, baseline query, compare, synthesize |\n\n## Features\n\nBuilt on [`@cyanheads/mcp-ts-core`](https://github.com/cyanheads/mcp-ts-core):\n\n- Declarative tool definitions — single file per tool, framework handles registration and validation\n- Unified error handling across all tools\n- Pluggable auth (`none`, `jwt`, `oauth`)\n- Swappable storage backends: `in-memory`, `filesystem`, `Supabase`, `Cloudflare KV/R2/D1`\n- Structured logging with optional OpenTelemetry tracing\n- Runs locally (stdio/HTTP) or on Cloudflare Workers from the same codebase\n\nCDC-specific:\n\n- Wraps the [Socrata SODA API v2.1](https://dev.socrata.com/) — no auth required, optional app token for higher rate limits\n- Discovery-first approach for a heterogeneous catalog (~1,487 datasets across many health domains)\n- Conservative request spacing for rate limit compliance (no rate-limit headers returned by Socrata)\n- Handles SODA string-typed responses — all values returned as strings, parsed via column type metadata\n\n## Getting started\n\n### Public Hosted Instance\n\nA public instance is available at `https://cdc.caseyjhand.com/mcp` — no installation required. Point any MCP client at it via Streamable HTTP:\n\n```json\n{\n \"mcpServers\": {\n \"cdc-health-mcp-server\": {\n \"type\": \"streamable-http\",\n \"url\": \"https://cdc.caseyjhand.com/mcp\"\n }\n }\n}\n```\n\n### Self-Hosted / Local\n\nAdd the following to your MCP client configuration file.\n\n```json\n{\n \"mcpServers\": {\n \"cdc-health-mcp-server\": {\n \"type\": \"stdio\",\n \"command\": \"bunx\",\n \"args\": [\"@cyanheads/cdc-health-mcp-server@latest\"],\n \"env\": {\n \"MCP_TRANSPORT_TYPE\": \"stdio\",\n \"MCP_LOG_LEVEL\": \"info\"\n }\n }\n }\n}\n```\n\nOr with npx (no Bun required):\n\n```json\n{\n \"mcpServers\": {\n \"cdc-health-mcp-server\": {\n \"type\": \"stdio\",\n \"command\": \"npx\",\n \"args\": [\"-y\", \"@cyanheads/cdc-health-mcp-server@latest\"],\n \"env\": {\n \"MCP_TRANSPORT_TYPE\": \"stdio\",\n \"MCP_LOG_LEVEL\": \"info\"\n }\n }\n }\n}\n```\n\nOr with Docker:\n\n```json\n{\n \"mcpServers\": {\n \"cdc-health-mcp-server\": {\n \"type\": \"stdio\",\n \"command\": \"docker\",\n \"args\": [\"run\", \"-i\", \"--rm\", \"-e\", \"MCP_TRANSPORT_TYPE=stdio\", \"ghcr.io/cyanheads/cdc-health-mcp-server:latest\"]\n }\n }\n}\n```\n\nFor Streamable HTTP, set the transport and start the server:\n\n```sh\nMCP_TRANSPORT_TYPE=http MCP_HTTP_PORT=3010 bun run start:http\n# Server listens at http://localhost:3010/mcp\n```\n\n### Prerequisites\n\n- [Bun v1.3.2](https://bun.sh/) or higher.\n- Optional: [Socrata app token](https://dev.socrata.com/docs/app-tokens.html) for higher rate limits.\n\n### Installation\n\n1. **Clone the repository:**\n\n```sh\ngit clone https://github.com/cyanheads/cdc-health-mcp-server.git\n```\n\n2. **Navigate into the directory:**\n\n```sh\ncd cdc-health-mcp-server\n```\n\n3. **Install dependencies:**\n\n```sh\nbun install\n```\n\n## Configuration\n\nAll configuration is validated at startup via Zod schemas in `src/config/server-config.ts`. Key environment variables:\n\n| Variable | Description | Default |\n|:---|:---|:---|\n| `MCP_TRANSPORT_TYPE` | Transport: `stdio` or `http` | `stdio` |\n| `MCP_HTTP_PORT` | HTTP server port | `3010` |\n| `MCP_AUTH_MODE` | Authentication: `none`, `jwt`, or `oauth` | `none` |\n| `MCP_LOG_LEVEL` | Log level (`debug`, `info`, `warning`, `error`, etc.) | `info` |\n| `LOGS_DIR` | Directory for log files (Node.js only) | `/logs` |\n| `STORAGE_PROVIDER_TYPE` | Storage backend: `in-memory`, `filesystem`, `supabase`, `cloudflare-kv/r2/d1` | `in-memory` |\n| `CDC_APP_TOKEN` | Socrata app token for higher rate limits | none |\n| `CDC_BASE_URL` | Base URL for SODA API requests | `https://data.cdc.gov` |\n| `CDC_CATALOG_URL` | Base URL for Socrata Discovery API | `https://api.us.socrata.com/api/catalog/v1` |\n| `OTEL_ENABLED` | Enable [OpenTelemetry instrumentation](https://github.com/cyanheads/mcp-ts-core/tree/main/docs/telemetry) (spans, metrics, completion logs) | `false` |\n\n## Running the server\n\n### Local development\n\n- **Build and run the production version**:\n\n ```sh\n # One-time build\n bun run rebuild\n\n # Run the built server\n bun run start:http\n # or\n bun run start:stdio\n ```\n\n- **Run checks and tests**:\n ```sh\n bun run devcheck # Lints, formats, type-checks, and more\n bun run test # Runs the test suite\n ```\n\n## Project structure\n\n| Directory | Purpose |\n|:---|:---|\n| `src/mcp-server/tools` | Tool definitions (`*.tool.ts`). Three CDC data tools. |\n| `src/mcp-server/resources` | Resource definitions. Catalog overview and dataset detail. |\n| `src/mcp-server/prompts` | Prompt definitions. Health trend analysis workflow. |\n| `src/services/socrata` | Socrata SODA API service layer — HTTP client, catalog search, metadata, queries. |\n| `src/config` | Server-specific environment variable parsing and validation with Zod. |\n\n## Development guide\n\nSee [`CLAUDE.md`](https://github.com/cyanheads/cdc-health-mcp-server/blob/main/CLAUDE.md) for development guidelines and architectural rules. The short version:\n\n- Handlers throw, framework catches — no `try/catch` in tool logic\n- Use `ctx.log` for logging, `ctx.state` for storage\n- Register new tools and resources in the `createApp()` arrays\n\n## Contributing\n\nIssues and pull requests are welcome. Run checks and tests before submitting:\n\n```sh\nbun run devcheck\nbun run test\n```\n\n## License\n\nThis project is licensed under the Apache 2.0 License. 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