This is a straightforward utility server that handles base64 encoding and decoding, including URL-safe variants. It runs as a remote service over SSE transport and uses the x402 micropayment system, so you'll pay per operation. The GitHub repo is pretty bare, just showing the TypeScript source structure without much documentation. Reach for this if you need Claude to encode or decode base64 strings on the fly and you're already set up with x402 payments. It's a simple codec service, nothing more. The remote API endpoint suggests it's hosted and ready to use rather than something you run locally.
claude mcp add --transport sse io.github.br0ski777-base64-codec https://base64-codec.api.klymax402.com/mcp