Moved

SpecterJWT MCP is now part of Northern Forge MCP

Agents call tools to decode JWT, validate signatures, regex-scan claims, diff payloads, and extract base64 segments. Unique for agents because it bundles JWT + regex + diff…

This was a standalone MCP app; it's retired. Its job — and the rest of the free core toolset — now lives on the flagship agent server below. Same idea, one server, actually up.

Call it now

Live now: jwt_decode (was decode_jwt)
validate_signature — not yet on flagship, see full catalog at /tools
regex_scan_claims — not yet on flagship, see full catalog at /tools
diff_jwt_claims — not yet on flagship, see full catalog at /tools
extract_base64 — not yet on flagship, see full catalog at /tools
generate_test_jwt — not yet on flagship, see full catalog at /tools

Some of this product's tools already ship under those names on flagship.

Endpoints

GET  https://mcp.justindkamen.com/tools   — list all tools (REST)
POST https://mcp.justindkamen.com/tools   — call a tool (REST)
POST https://mcp.justindkamen.com/mcp     — MCP JSON-RPC (initialize, tools/list, tools/call)

Claude / Cursor config

{
  "mcpServers": {
    "northern-forge": {
      "url": "https://mcp.justindkamen.com/mcp"
    }
  }
}

List tools (REST) MCP discovery Install docs