# wikidata-mcp-server [Health: Active] **Category:** 💻 Developer Tools **Repository:** https://github.com/cyanheads/wikidata-mcp-server **GitHub Stars:** 3 **Views:** 0 **Installs:** 0 **Upvotes:** 0 **Directory Page:** https://allmcps.com/mcp/wikidata-mcp-server ## Description Search and fetch Wikidata entities, execute SPARQL queries, and resolve external identifiers. ## Claude Desktop Quick Installation Install path detected from listing signals. Uses `bunx` (confidence: high): ```json "mcpServers": { "wikidata-mcp-server": { "command": "bunx", "args": ["@cyanheads/wikidata-mcp-server@latest"] } } ``` ## Documentation & README

@cyanheads/wikidata-mcp-server

Search and fetch Wikidata entities, execute SPARQL queries, and resolve external identifiers via MCP. STDIO or Streamable HTTP.

7 Tools • 1 Resource

[![Version](https://img.shields.io/badge/Version-0.1.18-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/wikidata-mcp-server) [![MCP SDK](https://img.shields.io/badge/MCP%20SDK-^2.0.0-green.svg?style=flat-square)](https://modelcontextprotocol.io/) [![npm](https://img.shields.io/npm/v/@cyanheads/wikidata-mcp-server?style=flat-square&logo=npm&logoColor=white)](https://www.npmjs.com/package/@cyanheads/wikidata-mcp-server) [![TypeScript](https://img.shields.io/badge/TypeScript-^7.0.2-3178C6.svg?style=flat-square)](https://www.typescriptlang.org/) [![Bun](https://img.shields.io/badge/Bun-v1.3.0%2B-blueviolet.svg?style=flat-square)](https://bun.sh/)
[![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/wikidata-mcp-server/releases/latest/download/wikidata-mcp-server.mcpb) [![Install in Cursor](https://cursor.com/deeplink/mcp-install-dark.svg)](https://cursor.com/en/install-mcp?name=wikidata-mcp-server&config=eyJjb21tYW5kIjoibnB4IiwiYXJncyI6WyIteSIsIkBjeWFuaGVhZHMvd2lraWRhdGEtbWNwLXNlcnZlciJdfQ==) [![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%22wikidata-mcp-server%22%2C%22command%22%3A%22npx%22%2C%22args%22%3A%5B%22-y%22%2C%22%40cyanheads%2Fwikidata-mcp-server%22%5D%7D) [![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)
**Public Hosted Server:** [https://wikidata.caseyjhand.com/mcp](https://wikidata.caseyjhand.com/mcp)
--- ## Tools 7 tools for working with Wikidata's knowledge graph: | Tool | Description | |:---|:---| | `wikidata_search_entities` | Search for items or properties by text query, returning QIDs/PIDs with labels, descriptions, and match metadata | | `wikidata_get_entity` | Fetch a full entity by QID or PID with optional field and language filtering | | `wikidata_get_labels` | Batch-resolve up to 50 QIDs or PIDs to human-readable labels and descriptions | | `wikidata_get_statements` | Fetch property claims for an entity with qualifier detail and QID label resolution | | `wikidata_get_sitelinks` | Fetch Wikipedia and Wikimedia project article URLs for a Wikidata item | | `wikidata_sparql_query` | Execute a SPARQL SELECT query against the Wikidata Query Service | | `wikidata_resolve_external_id` | Look up a Wikidata entity by an external identifier (DOI, PubMed ID, ORCID, OpenAlex ID, etc.) | ### `wikidata_search_entities` Search Wikidata for items or properties by text query. - Searches labels, aliases, and descriptions - `type="item"` for real-world concepts (people, places, works); `type="property"` for predicate P-IDs - Language-aware results (BCP 47 language codes) - Offset-based pagination, up to 50 results per call - Returns match metadata indicating whether the hit was on a label or alias --- ### `wikidata_get_entity` Fetch a Wikidata entity by QID or PID with field selection. - Q-IDs (e.g. `Q76`) fetch items; P-IDs (e.g. `P31`) fetch properties — endpoint routing is automatic - `fields` parameter selects `labels`, `descriptions`, `aliases`, `statements`, or `sitelinks` - `fields` narrows the upstream fetch, not just the response — Q76 is 344,114 bytes whole, 6,703 for `labels` alone - `languages` parameter filters multilingual maps to specific language codes, client-side (the entity endpoint takes no language parameter) - An entity too large to inline returns a field-category outline with byte sizes instead of the data — follow its `retrieval_notice`: it names a literal `fields` set already measured to fit (category sizes are additive, so requesting every name listed would overflow again), defers the remainder to a further call, and redirects a category too large to deliver whole (statements or sitelinks on a major item) to the tool that can narrow it --- ### `wikidata_get_labels` Batch-resolve QIDs/PIDs to human-readable labels and descriptions. - Up to 50 IDs per call, batched via the MediaWiki `wbgetentities` API - Supports multiple language codes per request - Reports `found` count and `notFound` IDs for partial-result handling - Designed for the common agent pattern: run a SPARQL query, then humanize the QID results --- ### `wikidata_get_statements` Fetch property claims for a Wikidata entity with full qualifier and reference detail. - `properties` parameter fetches only specific P-IDs — omit to return all statements - Value QIDs are resolved to human-readable labels by default via a batched label call - Set `resolve_labels=false` for raw QIDs only (faster, smaller payload) - A statement set too large to inline returns an outline of the available P-IDs with byte sizes, largest first, instead of the statements — re-call with `properties` for the ones you need (unfiltered, Q30 carries 467 properties across 1,717 statements) - Preferred-rank statements represent the most current values - Designed for fact verification: "what does Wikidata say about this entity's {property}?" --- ### `wikidata_get_sitelinks` Fetch Wikipedia and Wikimedia project article URLs for a Wikidata item. - Maps site codes (e.g., `enwiki`) to article titles and URLs - `sites` parameter filters to specific site codes - `wikis_only=true` returns only Wikipedia links (excludes Wiktionary, Wikiquote, Wikisource, etc.) - Major items can have 300+ sitelinks across languages - Only Q-IDs (items) have sitelinks — P-IDs are not supported --- ### `wikidata_sparql_query` Execute a SPARQL SELECT query against the Wikidata Query Service (Blazegraph). - Full graph power: multi-hop traversals, aggregations, subqueries, OPTIONAL, FILTER, UNION, BIND - Standard Wikidata prefixes (`wd:`, `wdt:`, `p:`, `ps:`, `pq:`, `wikibase:`, `bd:`) are auto-injected - `wikibase:label` SERVICE auto-injected when `language` is set and the query uses `?Label` variables - Results in SPARQL 1.1 JSON format: each binding is `{ type, value, "xml:lang"? }` - Hard server timeout is 60s; client-side `timeout` parameter (1–55s) applies earlier - Rate-limited at 60 requests/min and 5 concurrent requests per IP --- ### `wikidata_resolve_external_id` Look up a Wikidata entity by an external identifier. - Common use cases: CrossRef DOI → QID (P356), PubMed PMID → QID (P698), ORCID → author QID (P496), OpenAlex ID → entity QID (P10283), IMDb ID (P345) - Automatic value normalization: surrounding whitespace trimmed, resolver URL prefixes stripped (`https://doi.org/`, `https://pubmed.ncbi.nlm.nih.gov/`, `https://orcid.org/`), DOIs uppercased, PMID prefixes stripped, ORCID hyphens normalized - The property's data type must be `external-id` — item-valued or media properties (e.g. `P31`, `P18`) are rejected rather than returning an empty match - Returns `match=null` when not found (the Query Service lags the live wiki, so a null is not proof of absence) - Returns `multipleMatches` when a Wikidata data integrity issue causes more than one entity to claim the same external ID - Designed for cross-server joins with pubmed-mcp-server, crossref-mcp-server, and openalex-mcp-server ## Resource | Type | Name | Description | |:---|:---|:---| | Resource | `wikidata://entity/{id}` | Compact markdown summary of a Wikidata entity — labels, English description, instance-of, Wikipedia link, image, and statement count | All resource data is also reachable via tools. ## Features Built on [`@cyanheads/mcp-ts-core`](https://www.npmjs.com/package/@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) from the same codebase Wikidata-specific: - Wikidata REST API v1 for entity and statement fetches — no SPARQL overhead for lookup operations - MediaWiki `wbgetentities` API for efficient batch label resolution - Wikidata Query Service (Blazegraph) for SPARQL with auto-injected prefix headers and label SERVICE - Configurable `User-Agent` per Wikimedia policy - Separate timeout configuration for REST and SPARQL endpoints Agent-friendly output: - `wikidata_get_labels` designed to follow SPARQL result sets — run the query, then humanize in one call - `wikidata_resolve_external_id` handles DOI/PMID/ORCID normalization transparently, with `multipleMatches` for data integrity edge cases - `wikidata_get_statements` resolves QID values to labels in the same call, with `resolve_labels=false` escape hatch for raw payloads - All tools echo input parameters in the response for traceability ## Getting started ### Self-Hosted / Local Add the following to your MCP client configuration file. ```json { "mcpServers": { "wikidata-mcp-server": { "type": "stdio", "command": "bunx", "args": ["@cyanheads/wikidata-mcp-server@latest"], "env": { "MCP_TRANSPORT_TYPE": "stdio", "MCP_LOG_LEVEL": "info" } } } } ``` Or with npx (no Bun required): ```json { "mcpServers": { "wikidata-mcp-server": { "type": "stdio", "command": "npx", "args": ["-y", "@cyanheads/wikidata-mcp-server@latest"], "env": { "MCP_TRANSPORT_TYPE": "stdio", "MCP_LOG_LEVEL": "info" } } } } ``` Or with Docker: ```json { "mcpServers": { "wikidata-mcp-server": { "type": "stdio", "command": "docker", "args": ["run", "-i", "--rm", "-e", "MCP_TRANSPORT_TYPE=stdio", "ghcr.io/cyanheads/wikidata-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 (or Node.js ≥ 24.0.0). ### Installation 1. **Clone the repository:** ```sh git clone https://github.com/cyanheads/wikidata-mcp-server.git ``` 2. **Navigate into the directory:** ```sh cd wikidata-mcp-server ``` 3. **Install dependencies:** ```sh bun install ``` ## Configuration All configuration is validated at startup via Zod schemas. 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_AUTH_MODE` | Authentication: `none`, `jwt`, or `oauth` | `none` | | `MCP_SESSION_MODE` | HTTP session mode: `stateful`, `stateless`, or `auto`. The framework's `auto` default resolves to `stateful`; this server explicitly selects `stateless`. | `stateless` | | `MCP_LOG_LEVEL` | Log level (`debug`, `info`, `notice`, `warning`, `error`) | `info` | | `MCP_GC_PRESSURE_INTERVAL_MS` | Opt-in Bun-only forced-GC interval (ms). Try `60000` if heap growth is observed under 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` | | `WIKIDATA_USER_AGENT` | User-Agent string for Wikimedia requests (policy requires a descriptive value) | `wikidata-mcp-server/0.1 (https://github.com/cyanheads/wikidata-mcp-server)` | | `WIKIDATA_SPARQL_TIMEOUT_MS` | Max wait for a SPARQL response in ms | `55000` | | `WIKIDATA_REST_TIMEOUT_MS` | Max wait for REST API responses in ms | `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`). Seven tools for entity lookup, statements, sitelinks, SPARQL, and external ID resolution. | | `src/mcp-server/resources` | Resource definitions. Entity summary resource. | | `src/services/wikidata` | Wikidata service layer — REST API client, SPARQL client, statement normalization, types. | | `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/wikidata-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 Apache-2.0 — see [LICENSE](https://github.com/cyanheads/wikidata-mcp-server/blob/HEAD/LICENSE) for details.