Generate an image from a text prompt with flux-2-klein (NaN API). Use edit_image instead when you already have reference images to transform. Saves each image under NAN_OUTPUT_DIR (default ~/nan-mcp-output) and never overwrites: a taken name gets -2, -3, and so on. Returns the saved path and the temporary source URL. Counts against the account image quota (100/month).

List the kokoro voice ids that text_to_speech accepts, grouped by language. Answered from the catalog bundled with the server, so it costs no API call and takes no arguments.

Synthesize speech from text with kokoro (NaN API TTS); speech_to_text does the opposite. Call list_voices first to pick a voice id. Writes the audio under NAN_OUTPUT_DIR (default ~/nan-mcp-output) without overwriting anything, and returns the saved path and its size in bytes.

Transcribe a local audio file with whisper (NaN API STT); text_to_speech does the opposite. The file must exist on this machine and stay under 25MB and about 2 minutes, or the request times out. Returns the plain transcript, or the full JSON with per-segment timings when verbose is set. Writes nothing to disk.

List the NaN API model ids the configured key can reach, one per line with its owner. Useful to confirm access or spot a retired model before calling another tool.

Turn text into 4096-dimension vectors with qwen3-embedding (NaN API) for RAG or semantic search; rerank_documents then orders whatever a search over those vectors brings back. Returns only a summary — item count, dimensions and input tokens — because the vectors are far too large to put in the conversation, so use this to populate a store rather than to read values.

Order documents by how well they answer a query, with Qwen3-Reranker-8B (NaN API). This is the second half of a RAG pipeline: embed_text builds the vectors a search runs over, and this one ranks what that search returns. Returns one line per document with its relevance score and its position in the input list, in the order the reranker gives them back.

Transform existing images with flux-2-klein image-to-image (NaN API). Use generate_image instead when starting from text alone. Takes 1 to 4 local reference files (PNG, JPEG or WebP, each under 25MB), saves the result under NAN_OUTPUT_DIR (default ~/nan-mcp-output) without overwriting anything, and returns the saved path and the temporary source URL. Counts against the account image quota (100/month).