"Known" matching MCP servers:

Verifies blockchain-anchored timestamp proofs entirely on the user's machine, with five tools: hash a file, verify a file against a proof, verify a known hash against inline proof data, explain what a proof asserts, and create a new proof through ProofLedger. Verification recomputes the SHA-256 and walks the Merkle path locally instead of asking the issuer; only create uses the network.

MCP server that wraps the official JPO patent information API to enable retrieval of patent, trademark, and design records for known case numbers.

Generates signed .well-known MCP server cards (SEP-1649/1960/2127) to enable MCP server discovery and compliance.

Enables natural-language access to a curated, cited dataset of South African tax deadlines, with tools for listing all known deadlines and finding those upcoming within a specified window, optionally filtered by category.