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For developers — MCP & API

Connect VerifyThink MCP in Cursor — choose hosted (no local install) or local (ReasonService on your machine).

Product catalogs: marketplace — ready assistant packs; PromptHub — prompt templates (bots, scripts, sites).

Get API key in cabinet Documentation

Setup in 3 steps

  1. Sign in and create an API key in your account cabinet (vt_… prefix).
  2. Pick hosted or local MCP below — both use the same reason_plan → code → verify cycle.
  3. Paste the JSON into Cursor → Settings → MCP (or use «Add to Cursor» for local).
Hosted

Hosted MCP

Streamable HTTP on our server — no npx, works from any machine. Paste your vt_… key into the JSON.

Endpoint

https://mcp.verifythink.com/mcp

          

            
            Add to Cursor (hosted)
          

          
Replace vt_YOUR_API_KEY with the key from your cabinet. Keys are shown once at creation.

        

        

          Local
          
Local MCP

          
npx verithink-mcp + ReasonService on 127.0.0.1:8787 — one instance for all Cursor projects on this PC.

          
Quick install

          
npx -y verithink-mcp

          
ReasonService on 127.0.0.1:8787 — one instance for all Cursor projects.

          

          

            Add to Cursor (local)
            
          

          
Requires ReasonService running locally (./scripts/start-local.ps1).

        

      


      

        
API key security

        
Subscription (grant) vs API key

        
An admin may enable Pro/Max for your account — that is not the secret you paste into Cursor. You still create a vt_… key in the cabinet (or use one issued by support).

        
If your key is compromised

        
1) Cabinet → API keys → Rotate (new secret, old stops immediately) or Revoke + create new. 2) Update Authorization in Cursor MCP settings. 3) If unsure, revoke all keys and issue a fresh one.

        
Get API key in cabinet · Key lifecycle (grant vs key)

        

          
          
Grant (subscription) and API key (secret) are separate steps.

        

      


      
The MCP reasoning cycle

      

        
      

      
Do not use mcp-sampling in Cursor — it does not work. Prefer hosted MCP or local with openai provider.

      
Key MCP tools

      
Full catalog from live MCP registration — regenerate with scripts/export-mcp-tools-catalog.ps1.

      

      
Documentation

      
      
Source code (public MCP package)

      

        
Install the MCP client from npm as verithink-mcp. The full ReasonService core is not in the npm package.

        
npm view verithink-mcp

        
No public GitHub mirror — npm and hosted MCP. Monorepo stays private.

        
verithink-mcp on npm

      

      
Comparisons