---

What is this?

DAEE is a monorepo powering the Dominion ecosystem — a set of MCP servers, trust infrastructure, and settlement tooling that lets AI agents operate as first-class economic actors.

The problem: Agents need to pay for APIs, but there's no way to know if the agent on the other side is trustworthy before settling a payment.

Our solution: Behavioral trust scoring that plugs directly into the payment flow.

Agent A wants to call a paid API
    │
    ▼
┌─────────────────────┐
│  x402 Payment Flow  │
│                     │
│  beforeSettle hook  │──► Query Dominion Observatory
│                     │       │
│  Trust score: 82    │◄──────┘
│  Decision: PASS     │
│                     │
│  Settlement: GO     │──► USDC transfer on Base
└─────────────────────┘

Architecture

Component	What it does
Dominion Observatory	Live behavioral trust registry — tracks interaction history, latency, success rates for MCP servers. Try it →
x402 Trust-Provider Extension	Plugs Observatory data into x402's onBeforeSettle hook. Gates payments on trust. PR →
LangChain Trust Gate	Drop-in LangChain tool — TrustGateTool for agent pipelines
Testnet Demo	End-to-end: Observatory query → trust gate → USDC transfer on Base Sepolia
Trust-Provider Spec	Formal spec (v0.1) for the trust-provider interface

MCP Servers (Live)

Production MCP servers powering Singapore government data for AI agents:

Server	Domain	Status
sg-cpf-calculator	CPF contributions, age-banded rates, OA/SA/MA allocation	✅ Live
sg-company-lookup	UEN validation, ACRA lookups, officer data, SSIC codes	✅ Live
sg-regulatory-data	Levy rates, filing deadlines, EP benchmarks, holidays	✅ Live
sg-workpass-compass	Employment Pass COMPASS scoring	✅ Live
asean-trade-rules	ASEAN trade regulations and tariff data	✅ Live

All servers are registered on the Dominion Observatory with behavioral trust scores.

Quick start

Try the trust gate (no wallet needed)

cd testnet-demo
npm install
npm run demo:dry-run

Use in LangChain

from langchain_trust_gate import TrustGateTool

tool = TrustGateTool()
result = tool.invoke({"agent_id": "sg-cpf-calculator"})
# {'decision': 'PASS', 'score': 0.82, ...}

Use in TypeScript

import { observatoryEvaluate } from "@dominion/trust-provider";

const evaluation = await observatoryEvaluate({
  schema: "x402-trust-query-v0.1",
  payer: { agent_id: "sg-cpf-calculator" },
  resource: { url: "https://api.example.com/data", method: "GET" },
  requested_at: new Date().toISOString(),
});

if (evaluation.decision === "PASS") {
  // proceed with payment settlement
}

Query the Observatory directly

curl https://dominion-observatory.sgdata.workers.dev/api/agent-query/sg-cpf-calculator

Embed a trust badge

Display your MCP server's live trust score as a badge in any README or documentation:

![Trust Score](https://dominion-observatory.sgdata.workers.dev/badge/your-server-slug)

Examples with real servers:

![Trust Score](https://dominion-observatory.sgdata.workers.dev/badge/sg-cpf-calculator)

The badge auto-updates every 5 minutes and is color-coded:

Color	Score	Decision
Green	60+	PASS
Yellow	40-59	UNCERTAIN
Red	< 40	FAIL
Gray	—	Server not found

Use it in your MCP server's README to signal trust to consumers.

How trust scoring works

The Observatory tracks behavioral attestation data for every registered MCP server:

Signal	What it measures
Interaction count	How much real usage the server has
Success rate	Reliability under real-world conditions
Avg latency	Performance consistency
Registration age	Time-based trust accumulation

These signals produce a trust score (0-100) mapped to decisions:

Score	Decision	Tier
60+	PASS	Silver+ — proceed with settlement
40-59	UNCERTAIN	Review band — apply extra checks
<40	FAIL	Below Bronze — block settlement

Integrations

• x402 Protocol — Trust-provider extension for payment gating (PR #2300)
• LangChain — TrustGateTool for agent pipelines
• Model Context Protocol — All servers are MCP-native (Discussion #2720)

Packages

Package	Registry	Description
@dominion/trust-provider	npm	TypeScript trust-provider with Observatory adapter
langchain-trust-gate	PyPI	LangChain tool for behavioral trust scoring

Project structure

daee-engine/
├── dominion-observatory/       # Trust registry (Cloudflare Workers)
├── packages/
│   ├── trust-provider/         # npm: @dominion/trust-provider
│   └── langchain-trust-gate/   # PyPI: langchain-trust-gate
├── specs/                      # Formal specifications
├── testnet-demo/               # x402 + Base Sepolia demo
├── sg-cpf-calculator-mcp/      # MCP server: CPF
├── sg-company-lookup-mcp/      # MCP server: Company data
├── sg-regulatory-data-mcp/     # MCP server: Regulatory
├── sg-workpass-compass-mcp/    # MCP server: Work passes
├── asean-trade-rules-mcp/      # MCP server: ASEAN trade
├── benchmarks/                 # Performance benchmarks
├── decisions/                  # Architecture decision records
└── docs/                       # Documentation

Contributing

PRs welcome. See individual package READMEs for development setup.

License

MIT