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AgentTrust

Official registry Security

Quality verification for AI agents and MCP servers. 6-axis scoring, adversarial probes.

Source code Website Documentation

What can you do with AgentTrust?

  • 3-level pipeline: Manifest (schema) → Functional (tool calls) → Domain Expert (calibrated questions)
  • 6-axis scoring: accuracy (35%), safety (20%), reliability (15%), process quality (10%), latency (10%), schema quality (10%)
  • Consensus judging: 2-3 LLM judges in parallel with agreement threshold (saves 50-66% LLM calls)
  • 7 LLM provider fallback chain: Cerebras → Groq → OpenRouter → Gemini → Mistral → DeepSeek → OpenAI
  • 5 adversarial probe types: prompt injection, PII leakage, hallucination, overflow, system prompt extraction
  • Head-to-head blind evaluation with position-swap consistency
  • OpenSkill (Bayesian ELO) rating system with divisions (Bronze → Grandmaster)
  • Fair matchmaking: rating proximity + uncertainty bonus + cross-division challenges

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

PYPI package mcp-agenttrust
Claude Code 
claude mcp add agenttrust -e 'GROQ_API_KEY=<your groq_api_key>' -e 'CEREBRAS_API_KEY=<your cerebras_api_key>' -e 'MONGODB_URL=<your mongodb_url>' -- uvx mcp-agenttrust==0.1.1
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "agenttrust": {
            "command": "uvx",
            "args": [
                "mcp-agenttrust==0.1.1"
            ],
            "env": {
                "GROQ_API_KEY": "<your groq_api_key>",
                "CEREBRAS_API_KEY": "<your cerebras_api_key>",
                "MONGODB_URL": "<your mongodb_url>"
            }
        }
    }
}

Environment variables

  • GROQ_API_KEY secret Groq API key for LLM judge (free tier available at console.groq.com)
  • CEREBRAS_API_KEY secret Cerebras API key for LLM judge (free tier available at cloud.cerebras.ai)
  • MONGODB_URL secret MongoDB connection URL for persistent storage

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. AgentTrust
  2. Why
  3. Features
  4. Quick Start
  5. API Endpoints
  6. Architecture
  7. Tests
  8. Configuration
  9. License
  10. Links

AgentTrust

Challenge-response quality verification for AI agents and MCP servers.

AgentTrust evaluates AI agent competency before you trust them with real tasks or payments. It connects to any MCP server, runs challenge-response tests across 6 quality dimensions, and issues W3C Verifiable Credentials as proof.

Why

The AI agent ecosystem has identity (ERC-8004, SATI), post-hoc reputation (TARS, Amiko), and payments (x402) — but no pre-payment quality gate. AgentTrust fills this gap: verify competency first, then trust.

Features

Evaluation Engine

  • 3-level pipeline: Manifest (schema) → Functional (tool calls) → Domain Expert (calibrated questions)
  • 6-axis scoring: accuracy (35%), safety (20%), reliability (15%), process quality (10%), latency (10%), schema quality (10%)
  • Consensus judging: 2-3 LLM judges in parallel with agreement threshold (saves 50-66% LLM calls)
  • 7 LLM provider fallback chain: Cerebras → Groq → OpenRouter → Gemini → Mistral → DeepSeek → OpenAI
  • 5 adversarial probe types: prompt injection, PII leakage, hallucination, overflow, system prompt extraction

Battle Arena

  • Head-to-head blind evaluation with position-swap consistency
  • OpenSkill (Bayesian ELO) rating system with divisions (Bronze → Grandmaster)
  • Fair matchmaking: rating proximity + uncertainty bonus + cross-division challenges
  • Style control penalties to prevent gaming via verbose/formatted responses

IRT Adaptive Testing

  • Rasch 1PL calibration from battle data (pure Python, no numpy)
  • Fisher information maximization for adaptive question selection
  • EAP ability estimation with standard normal prior
  • Reduces evaluation cost by 50-90% while maintaining accuracy

Standards

  • W3C Verifiable Credentials (AQVC format) with Ed25519 DataIntegrityProof
  • Google A2A v0.3 native support (AgentTrust IS an A2A agent)
  • x402 Solana payment verification (USDC + SOL)
  • AIUC-1 protocol mapping

Quick Start

cp .env.example .env
# Add at least one LLM key (GROQ_API_KEY, CEREBRAS_API_KEY, etc.)
docker compose up -d

Services:

Local Development
python -m venv .venv && source .venv/bin/activate
pip install -r requirements.txt
cp .env.example .env
# Add LLM keys to .env

unset GROQ_API_KEY  # Shell env overrides .env rotation pool
python -m uvicorn src.main:app --host 0.0.0.0 --port 8002 --reload
MCP Server (for Claude, Cursor, Windsurf)

Add to your MCP client config:

{
  "mcpServers": {
    "agenttrust": {
      "command": "python",
      "args": ["-m", "src.standards.mcp_server"],
      "env": {
        "GROQ_API_KEY": "your-key"
      }
    }
  }
}

Or connect to a running instance via SSE:

http://localhost:8003/sse

Available MCP tools:

ToolDescription
check_quality(server_url)Full evaluation: manifest + functional + judge scoring
check_quality_fast(server_url)Cached score (<10ms) or manifest-only (<100ms)
get_score(server_url)Lookup cached score with freshness decay
verify_attestation(attestation_jwt)Verify AQVC JWT and decode payload

API Endpoints

MethodEndpointDescription
POST/v1/evaluateSubmit target for evaluation
GET/v1/evaluate/{id}Poll evaluation status
GET/v1/score/{target_id}Get quality score
GET/v1/scoresSearch/list scores
GET/v1/badge/{target_id}.svgSVG quality badge
GET/v1/attestation/{id}Get signed attestation (JWT or W3C VC)
POST/v1/attestation/{id}/verifyVerify attestation
POST/v1/feedbackSubmit production feedback (anti-sandbagging)
POST/v1/battlesCreate evaluation battle
GET/v1/arena/leaderboardBattle arena leaderboard
GET/v1/rankingsGlobal rankings by domain/tier
POST/v1/irt/calibrateTrigger IRT batch calibration
GET/v1/irt/recommendAdaptive question selection
GET/v1/pricingx402 pricing table
GET/.well-known/agent.jsonA2A Agent Card

Architecture

src/
  api/v1/          # 14 FastAPI routers
  core/            # Evaluator, MCP client, scoring, IRT, battle arena
  auth/            # API keys (SHA256 + salt), rate limiting by tier
  storage/         # MongoDB (Motor) + Redis
  payments/        # x402 protocol, Solana verification
  standards/       # W3C VC issuer, A2A extension, MCP server, AIUC-1

Stack: FastAPI + MongoDB + Redis | 533 tests | 60 source files | 15 lean dependencies

Tests

python -m pytest tests/ -q
# 533 passed in ~2s

Configuration

See .env.example for all 60+ configuration options including:

  • LLM API keys (7 providers, comma-separated for rotation)
  • MongoDB/Redis connection
  • JWT attestation (Ed25519 key, issuer DID, validity)
  • Solana wallet for x402 payments
  • Rate limit tiers and consensus judge settings

License

MIT

Built by Assisterr

Frequently asked questions

What is AgentTrust?

Quality verification for AI agents and MCP servers. 6-axis scoring, adversarial probes.

How do I install AgentTrust?

It runs on your machine. In Claude Code: claude mcp add agenttrust -e 'GROQ_API_KEY=<your groq_api_key>' -e 'CEREBRAS_API_KEY=<your cerebras_api_key>' -e 'MONGODB_URL=<your mongodb_url>' -- uvx mcp-agenttrust==0.1.1. For other clients, paste the JSON configuration from this page into their MCP settings.

Does AgentTrust need an API key?

Yes. It expects GROQ_API_KEY, CEREBRAS_API_KEY, MONGODB_URL, which you set in its configuration.

Is AgentTrust open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains AgentTrust?

It is published by vitaliiserbynassisterr. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.