<!-- mcp-name: io.github.AlexanderLawson17/revettr-mcp -->

Revettr

Counterparty risk scoring for agentic commerce. One API call answers: "Should this agent send money to this counterparty?"

Revettr scores counterparties by analyzing domain intelligence, IP reputation, on-chain wallet history, and sanctions lists. It's designed for AI agents transacting via x402 on Base.

Install

pip install revettr

Quick Start

from revettr import Revettr

client = Revettr()

# Score a counterparty — send whatever data you have
score = client.score(
    domain="uniswap.org",
    ip="104.18.28.72",
    wallet_address="0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
)

print(f"Score: {score.score}/100 ({score.tier})")
print(f"Confidence: {score.confidence}")
print(f"Flags: {score.flags}")

if score.tier == "critical":
    print("DO NOT TRANSACT")

What Gets Scored

Send any combination of inputs. More data = higher confidence.

Input	Signal Group	What It Checks
domain	Domain Intelligence	WHOIS age, DNS config (MX, SPF, DMARC), SSL certificate
ip	IP Intelligence	Geolocation, VPN/proxy/Tor detection, datacenter vs residential
wallet_address	Wallet Analysis	Transaction count, wallet age, counterparty diversity, on-chain behavior
company_name	Sanctions Screening	OFAC SDN, EU consolidated, UN consolidated sanctions lists

Response

{
  "score": 90,
  "tier": "low",
  "confidence": 0.75,
  "signals_checked": 3,
  "flags": [],
  "signal_scores": {
    "domain": {
      "score": 80,
      "flags": [],
      "available": true,
      "details": {
        "domain_age_days": 2673,
        "dns": {"has_mx": true, "has_spf": true, "has_dmarc": true}
      }
    },
    "ip": {
      "score": 100,
      "flags": [],
      "available": true,
      "details": {
        "country": "US",
        "asn_org": "Cloudflare, Inc.",
        "is_private": false
      }
    },
    "wallet": {
      "score": 100,
      "flags": [],
      "available": true,
      "details": {
        "blockchain": {"tx_count": 100, "unique_counterparties": 29},
        "onchain": {"nonce": 16, "eth_balance": 0.072}
      }
    }
  },
  "metadata": {
    "inputs_provided": ["domain", "ip", "wallet_address"],
    "latency_ms": 1185,
    "version": "0.1.0"
  }
}

Score Tiers

Score	Tier	Meaning
80-100	low	Counterparty appears legitimate
60-79	medium	Some signals warrant caution
30-59	high	Multiple risk indicators present
0-29	critical	Strong risk signals — do not transact

A score of 0 means a hard match (e.g., exact sanctions hit). This overrides all other signals.

Risk Flags

Flags tell you exactly what triggered a score reduction. They are grouped by signal category:

Category	Examples	What It Covers
Domain	domain_age_under_*, no_mx_records, ssl_*	Domain age, DNS hygiene, SSL validity
IP	tor_exit_node, known_vpn, high_risk_country_*	Anonymization, geolocation risk
Wallet	wallet_never_transacted, wallet_age_under_*	On-chain history, activity patterns
Sanctions	sanctions_exact_match, sanctions_high_confidence_match	OFAC/EU/UN sanctions screening

The full set of flags and their descriptions are returned in the API response. Flag names are stable and machine-readable.

Usage Examples

Wallet only (minimal)

score = client.score(wallet_address="0xabc...")

Domain + IP (web service check)

score = client.score(domain="some-api.xyz", ip="185.220.101.42")

Full check

score = client.score(
    domain="merchant.com",
    ip="104.18.28.72",
    wallet_address="0xabc...",
    company_name="Merchant LLC",
)

With x402 auto-payment

The client handles x402 payment automatically. You need a funded wallet:

from revettr import Revettr

client = Revettr(
    wallet_private_key="0xYOUR_PRIVATE_KEY",  # Wallet that pays for the API call
)

# Client automatically handles the 402 → payment → retry flow
score = client.score(wallet_address="0xabc...")

Security: Never hardcode private keys. Use environment variables or a secrets manager in production.

Safe Agent Payments

Drop-in replacement for x402 payments that automatically checks counterparty risk before sending money. If the counterparty scores below your threshold, the payment is blocked.

from revettr import SafeX402Client, PaymentBlocked

async with SafeX402Client(
    wallet_private_key="0x...",
    min_score=60,    # Block "high" and "critical" risk
    on_fail="block", # Raise PaymentBlocked (default)
) as http:
    try:
        # Automatically scores the counterparty before paying
        response = await http.post("https://some-api.com/endpoint", json=data)
    except PaymentBlocked as e:
        print(f"Blocked: {e.url} scored {e.score}/100")

on_fail	Behavior
"block" (default)	Raise PaymentBlocked exception
"warn"	Log warning, proceed with payment
"log"	Silently log, proceed with payment

Pricing

Tier	Price	What You Get
Standard	$0.01 USDC	All available signals based on inputs provided

Payment is via x402 protocol — USDC on Base network. No API keys, no accounts, no contracts.

API Reference

POST /v1/score

Payment: x402 — $0.01 USDC on Base per request

Request body (JSON):

Field	Type	Required	Description
domain	string	No	Domain or URL
ip	string	No	IPv4 address
wallet_address	string	No	EVM address (0x...)
chain	string	No	Blockchain network (default: base)
company_name	string	No	Name to screen against sanctions
email	string	No	Email (future — not scored yet)
amount	float	No	Transaction amount in USD (context only)

At least one of domain, ip, wallet_address, or company_name is required.

GET /health

Payment: None (always free)

Returns API status and signal source availability.

Direct HTTP (without SDK)

# Without payment (returns 402):
curl -X POST https://revettr.com/v1/score \
  -H "Content-Type: application/json" \
  -d '{"domain": "example.com"}'

# Returns HTTP 402 with payment-required header containing x402 payment terms

Disclaimer

Revettr is an informational tool. It aggregates publicly available signals and returns a risk score. It is not a compliance certification, legal advice, or guarantee of counterparty legitimacy. You are responsible for your own transaction decisions.

Built by

L Squared Digital Holdings