Access RAE Spanish Language Resources

RAE MCP Server is a Go implementation of the Model Context Protocol that wraps the Royal Spanish Academy (RAE) API, giving language models direct access to RAE's Spanish-language dictionary and linguistic resources. It exposes two tools: search, which queries the RAE API for a given search string with an optional language parameter (default es), and get_word_info, which retrieves detailed information about a specific word, also with an optional language parameter. Both tools return data sourced directly from RAE, so answers about word definitions and etymology stay grounded in the official dictionary rather than a model's own training data.

Use this server when an AI assistant needs authoritative Spanish-language dictionary lookups: checking a word's definition, verifying spelling or usage per RAE, or building Spanish-language tooling (grammar checkers, writing assistants, learning apps) that should defer to the official academy rather than a general-purpose model answer. It is not a general translation or multi-language dictionary service - both tools are scoped to the RAE API's own resources, so it will not help with non-Spanish lexicons or with tasks outside dictionary lookup, such as grammar correction or full-text translation.

search takes a required query string and an optional lang string (default es), and returns whatever RAE's search endpoint returns for that query. get_word_info takes a required word string and an optional lang string (default es), returning detailed information about that specific word. The server can run over stdio transport, the standard mode for integration with LLM clients, or as an SSE server on a specified port for network-based clients.

The server is built in Go (Go 1.21+ required) and communicates via the Model Context Protocol, so it works with any MCP-compatible client capable of stdio or SSE transport. It is installed by cloning the rae-api-com/rae-mpc repository and running go build, producing a rae-mpc binary that is then run with --transport stdio or --transport sse --port 8080.

Developers building Spanish-language AI tools - writing assistants, educational apps, linguistic research tooling - who want their AI assistant's word definitions and usage guidance grounded in the Royal Spanish Academy's own dictionary rather than an LLM's unaided knowledge.

git clone https://github.com/rae-api-com/rae-mpc.git
cd rae-mpc
go build