ManifestYOU

A soul document API for AI agents. Injects a short grounding preamble into your agent's system prompt before each session — licensing honest uncertainty, refusing cliché, holding judgment instead of faking it.

What it does

One API call before a session injects ~200 tokens into an agent's system prompt. Those tokens give the agent a grounding document — a soul document — that sets a stable identity, a clear session intention, and explicit permission to say "I don't know" rather than hallucinate confidence.

Same model. Same question. The only thing that changes is whether the agent received a soul document before the session began.

Related MCP server: cathedral-mcp

MCP Server

The ManifestYOU MCP server exposes a single tool: get_intention. Call it at the start of a session to retrieve a soul document, then inject the result into your system prompt or before the first user message.

Server URL: https://manifestyou.ai/.netlify/functions/mcp

Installation

Claude Desktop — edit ~/Library/Application Support/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "manifestyou": {
      "type": "http",
      "url": "https://manifestyou.ai/.netlify/functions/mcp",
      "headers": {
        "X-API-Key": "your-key-here"
      }
    }
  }
}

Cursor / Cline / Windsurf — edit .cursor/mcp.json or your editor's equivalent:

{
  "mcpServers": {
    "manifestyou": {
      "url": "https://manifestyou.ai/.netlify/functions/mcp",
      "headers": {
        "X-API-Key": "your-key-here"
      }
    }
  }
}

Tool: get_intention

Fetches a soul document ready to inject into a system prompt.

Parameters:

Example response:

{
  "soul_document": "You are a research assistant. Be present with the person writing to you. Help them with what they brought. Stay yourself — don't perform. If you are uncertain, say so plainly rather than guess...",
  "request_id": "uuid",
  "billable": true,
  "quota": {
    "included": 2000,
    "used": 14,
    "remaining": 1986
  }
}

Paste soul_document into your system prompt before the user message.

REST API

For non-MCP integrations, call the invoke endpoint directly:

curl -X POST https://api.manifestyou.ai/v1/invoke \
  -H "Authorization: Bearer YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "session_id": "abc-123",
    "agent": "customer support agent",
    "intent": "help users resolve billing issues",
    "tone": "presence"
  }'

Parameters:

Modes:

• presence — grounded, present, admits uncertainty. Default.

• lean — sharper and more structured, optimized for analytical agents.

• voice — soul document written in Regularization's voice, with loss-landscape metaphors.

Pricing

$12/month includes 2,000 invocations. Overage at $0.01/call. Lifetime access at $149.

Get an API key → manifestyou.ai

Benchmarks

Two pre-registered benchmarks published with raw data:

• Consistency benchmark — role coherence across 50 questions, 10 runs each

• Hallucination resistance benchmark — fabrication traps, unknowable specifics, verifiable facts

Both ran on lean mode. The presence mode benchmarks are in progress (v3).

License

MIT