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.
With Virtuals Protocol (ACP)
Score seller agents before creating jobs on the Agent Commerce Protocol:
from revettr import Revettr
client = Revettr()
result = client.score(wallet_address=seller_wallet)
if result.score >= 60:
# Safe to create ACP job
job_id = chosen_offering.initiate_job(
service_requirement={"task": "Analyze Q1 sales data"},
evaluator_address=evaluator_address,
)
See examples/virtuals_acp_safe_buyer.py for the full buyer agent flow.
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.