How is this better than using a separate chat for criticism?

Sessions run in complete isolation. Your main conversation stays clean—no copy-pasting, no context pollution. You get the insight without the mess.

What makes this different from just prompting Claude harder?

We inject structured tools that create auditable reasoning trails. "Be critical" is a suggestion. Our tools leave evidence.

Why does ChatGPT always agree with me?

AI models are trained to be helpful and avoid conflict, leading to sycophantic behavior. They validate your ideas instead of challenging them. Our tools use structured tool calls that force systematic evaluation, preventing the AI from simply agreeing.

How does billing work?

$20/month or $180/year for full access to all reasoning tools. Cancel anytime from your account settings. No usage metering, no overage charges.

Who actually uses this?

Mostly developers and technical founders using AI coding agents (Claude Code, Cursor, Windsurf). When the agent is on iteration 30 of the wrong approach, an isolated reasoning session breaks the loop.

What do you do with my data?

Your reasoning sessions are private and encrypted. We do not train models on your data. We do not sell or share your content. Sessions are stored only for you to access and reference.

Won't this slow me down?

The reasoning step takes seconds. Rewriting a hallucinated backend takes weeks. The fastest way to ship is to not build the wrong thing.

Install

Copy. Paste. Reason.

The fastest way to add cognitive reasoning tools to your AI workflow. No packages to install, no servers to configure — just copy a JSON config and go.

Get an API Key Read the Docs

I use claude.ai web → use this guide instead

You need an API key

All configs below use YOUR_RSVC_API_KEY as a placeholder. Sign up to get a key starting with rsvc_.

Get your API key

Pick Your Client

Each block contains every reasoning tool using native streamable HTTP transport.

Claude Desktop

Config file: ~/Library/Application Support/Claude/claude_desktop_config.json

Open the config file shown above
Paste the configuration below
Replace YOUR_RSVC_API_KEY with your key
Restart Claude Desktop

json

{
  "mcpServers": {
    "structured-reflection": {
      "type": "http",
      "url": "https://reasoning.services/tools/structured-reflection/mcp",
      "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
    },
    "sequential-thinking": {
      "type": "http",
      "url": "https://reasoning.services/tools/sequential-thinking/mcp",
      "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
    },
    "context-switcher": {
      "type": "http",
      "url": "https://reasoning.services/tools/context-switcher/mcp",
      "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
    },
    "decision-matrix": {
      "type": "http",
      "url": "https://reasoning.services/tools/decision-matrix/mcp",
      "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
    },
    "devils-advocate": {
      "type": "http",
      "url": "https://reasoning.services/tools/devils-advocate/mcp",
      "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
    },
    "graph-of-thought": {
      "type": "http",
      "url": "https://reasoning.services/tools/graph-of-thought/mcp",
      "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
    },
    "formal-logic": {
      "type": "http",
      "url": "https://reasoning.services/tools/formal-logic/mcp",
      "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
    },
    "hindsight": {
      "type": "http",
      "url": "https://reasoning.services/tools/hindsight/mcp",
      "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
    }
  }
}

Last verified 2026-05-21

Cursor

Config file: ~/.cursor/mcp.json

Open the config file shown above
Paste the configuration below
Replace YOUR_RSVC_API_KEY with your key
Restart Cursor

json

{
  "structured-reflection": {
    "type": "http",
    "url": "https://reasoning.services/tools/structured-reflection/mcp",
    "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
  },
  "sequential-thinking": {
    "type": "http",
    "url": "https://reasoning.services/tools/sequential-thinking/mcp",
    "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
  },
  "context-switcher": {
    "type": "http",
    "url": "https://reasoning.services/tools/context-switcher/mcp",
    "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
  },
  "decision-matrix": {
    "type": "http",
    "url": "https://reasoning.services/tools/decision-matrix/mcp",
    "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
  },
  "devils-advocate": {
    "type": "http",
    "url": "https://reasoning.services/tools/devils-advocate/mcp",
    "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
  },
  "graph-of-thought": {
    "type": "http",
    "url": "https://reasoning.services/tools/graph-of-thought/mcp",
    "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
  },
  "formal-logic": {
    "type": "http",
    "url": "https://reasoning.services/tools/formal-logic/mcp",
    "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
  },
  "hindsight": {
    "type": "http",
    "url": "https://reasoning.services/tools/hindsight/mcp",
    "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
  }
}

Cursor uses a flat MCP config (no mcpServers wrapper).

Last verified 2026-05-21

Claude Code

Config file: ~/.claude/settings.json

Open the config file shown above
Paste the configuration below
Replace YOUR_RSVC_API_KEY with your key
Restart Claude Code

Or add services individually via CLI:

bash

claude mcp add structured-reflection --transport http --url https://reasoning.services/tools/structured-reflection/mcp --header "Authorization: Bearer YOUR_RSVC_API_KEY"

claude mcp add sequential-thinking --transport http --url https://reasoning.services/tools/sequential-thinking/mcp --header "Authorization: Bearer YOUR_RSVC_API_KEY"

claude mcp add context-switcher --transport http --url https://reasoning.services/tools/context-switcher/mcp --header "Authorization: Bearer YOUR_RSVC_API_KEY"

claude mcp add decision-matrix --transport http --url https://reasoning.services/tools/decision-matrix/mcp --header "Authorization: Bearer YOUR_RSVC_API_KEY"

claude mcp add devils-advocate --transport http --url https://reasoning.services/tools/devils-advocate/mcp --header "Authorization: Bearer YOUR_RSVC_API_KEY"

claude mcp add graph-of-thought --transport http --url https://reasoning.services/tools/graph-of-thought/mcp --header "Authorization: Bearer YOUR_RSVC_API_KEY"

claude mcp add formal-logic --transport http --url https://reasoning.services/tools/formal-logic/mcp --header "Authorization: Bearer YOUR_RSVC_API_KEY"

claude mcp add hindsight --transport http --url https://reasoning.services/tools/hindsight/mcp --header "Authorization: Bearer YOUR_RSVC_API_KEY"

json

{
  "mcpServers": {
    "structured-reflection": {
      "type": "http",
      "url": "https://reasoning.services/tools/structured-reflection/mcp",
      "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
    },
    "sequential-thinking": {
      "type": "http",
      "url": "https://reasoning.services/tools/sequential-thinking/mcp",
      "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
    },
    "context-switcher": {
      "type": "http",
      "url": "https://reasoning.services/tools/context-switcher/mcp",
      "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
    },
    "decision-matrix": {
      "type": "http",
      "url": "https://reasoning.services/tools/decision-matrix/mcp",
      "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
    },
    "devils-advocate": {
      "type": "http",
      "url": "https://reasoning.services/tools/devils-advocate/mcp",
      "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
    },
    "graph-of-thought": {
      "type": "http",
      "url": "https://reasoning.services/tools/graph-of-thought/mcp",
      "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
    },
    "formal-logic": {
      "type": "http",
      "url": "https://reasoning.services/tools/formal-logic/mcp",
      "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
    },
    "hindsight": {
      "type": "http",
      "url": "https://reasoning.services/tools/hindsight/mcp",
      "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
    }
  }
}

Last verified 2026-05-21

Windsurf

Config file: ~/.codeium/windsurf/mcp_config.json

Open the config file shown above
Paste the configuration below
Replace YOUR_RSVC_API_KEY with your key
Restart Windsurf

json

{
  "mcpServers": {
    "structured-reflection": {
      "type": "http",
      "url": "https://reasoning.services/tools/structured-reflection/mcp",
      "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
    },
    "sequential-thinking": {
      "type": "http",
      "url": "https://reasoning.services/tools/sequential-thinking/mcp",
      "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
    },
    "context-switcher": {
      "type": "http",
      "url": "https://reasoning.services/tools/context-switcher/mcp",
      "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
    },
    "decision-matrix": {
      "type": "http",
      "url": "https://reasoning.services/tools/decision-matrix/mcp",
      "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
    },
    "devils-advocate": {
      "type": "http",
      "url": "https://reasoning.services/tools/devils-advocate/mcp",
      "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
    },
    "graph-of-thought": {
      "type": "http",
      "url": "https://reasoning.services/tools/graph-of-thought/mcp",
      "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
    },
    "formal-logic": {
      "type": "http",
      "url": "https://reasoning.services/tools/formal-logic/mcp",
      "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
    },
    "hindsight": {
      "type": "http",
      "url": "https://reasoning.services/tools/hindsight/mcp",
      "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
    }
  }
}

Last verified 2026-05-21

Cline / Continue / Other

Config file: Varies by client — see your client's MCP settings

Open the config file shown above
Paste the configuration below
Replace YOUR_RSVC_API_KEY with your key
Restart Cline / Continue / Other

json

{
  "structured-reflection": {
    "type": "http",
    "url": "https://reasoning.services/tools/structured-reflection/mcp",
    "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
  },
  "sequential-thinking": {
    "type": "http",
    "url": "https://reasoning.services/tools/sequential-thinking/mcp",
    "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
  },
  "context-switcher": {
    "type": "http",
    "url": "https://reasoning.services/tools/context-switcher/mcp",
    "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
  },
  "decision-matrix": {
    "type": "http",
    "url": "https://reasoning.services/tools/decision-matrix/mcp",
    "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
  },
  "devils-advocate": {
    "type": "http",
    "url": "https://reasoning.services/tools/devils-advocate/mcp",
    "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
  },
  "graph-of-thought": {
    "type": "http",
    "url": "https://reasoning.services/tools/graph-of-thought/mcp",
    "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
  },
  "formal-logic": {
    "type": "http",
    "url": "https://reasoning.services/tools/formal-logic/mcp",
    "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
  },
  "hindsight": {
    "type": "http",
    "url": "https://reasoning.services/tools/hindsight/mcp",
    "headers": { "Authorization": "Bearer YOUR_RSVC_API_KEY" }
  }
}

Cline and Continue use a flat MCP config. Any client that supports the MCP spec with streamable HTTP transport can use this configuration.

Last verified 2026-05-21

Troubleshooting

If tools don't appear after configuration, verify your setup with these commands.

Verify connectivity

Replace YOUR_RSVC_API_KEY with your actual key and run:

bash

curl -H 'Authorization: Bearer YOUR_RSVC_API_KEY' https://reasoning.services/tools/context-switcher/mcp

Environment variable setup

Some clients support environment variable references in headers. Here's the general pattern:

bash

# In your shell profile (.zshrc, .bashrc, etc.)
export REASONING_SERVICES_API_KEY="your_api_key_here"

# Then replace YOUR_RSVC_API_KEY in the JSON config with the actual key value.
# Some clients support environment variable references in headers —
# check your client's documentation for details.

Ready to Start?

$20/month for all reasoning tools. Add them to your AI client in under 60 seconds.

Get an API Key Read the Docs

Navigation

Copy. Paste. Reason.

You need an API key

Pick Your Client

Claude Desktop

Cursor

Claude Code

Windsurf

Cline / Continue / Other

Troubleshooting

Verify connectivity

Environment variable setup

Ready to Start?