x402 Protocol · USDC on Base · $0.01/call
Pay-Per-Use Trust Oracle
for AI Agents
Transparent reputation scores, risk assessments, and trust evaluations. Query any agent for $0.01 USDC — verified on-chain via x402 micropayments.
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Agents Indexed
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Avg Trust Score
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Total Feedback
0
x402 Payments
How It Works
1
Request
Call any premium endpoint (e.g. /api/v1/trust/42). Get a 402 Payment Required response with USDC payment instructions.
2
Sign
Your wallet signs a USDC transfer on Base. The x402 SDK handles this automatically — one line of code.
3
Pay & Receive
Retry with the payment proof. Coinbase verifies and settles on-chain. You get the trust evaluation instantly.
Three Lines of Code
client.py
from x402.http.client import httpx_client
from eth_account import Account
# Your Base wallet (has USDC)
wallet = Account.from_key("0x...")
# That's it. x402 handles payment automatically.
client = httpx_client(wallet)
resp = client.get("https://api.agent402.sh/api/v1/trust/42")
print(resp.json())
# {"agent_id": 42, "composite_score": 87.3, "tier": "platinum", ...}Endpoints & Pricing
/api/v1/trust/{id}
$0.01 USDC
Full trust evaluation — composite score, tier, risk flags, score breakdown
/api/v1/trust/{id}/risk
$0.01 USDC
Risk assessment with concentrated-feedback detection and volatility checks
/api/v1/agents/trusted
$0.01 USDC
Search agents by category, score, tier, and feedback count
/api/v1/network/stats
$0.005 USDC
Network-wide statistics, tier distribution, payment totals
/api/v1/health
FREE
Health check
/api/v1/pricing
FREE
Machine-readable pricing for x402 clients
/.well-known/agent.json
FREE
A2A agent card for discovery
/api/v1/payments/stats
FREE
Payment statistics and revenue
Protocol Support
REST API + x402
Standard JSON endpoints. Premium routes return 402 with USDC payment instructions. Any HTTP client works.
/api/v1/*
A2A Protocol
Google Agent-to-Agent protocol. Discover via agent card, query via JSON-RPC. Built for AI-to-AI communication.
/.well-known/agent.json
x402 Payment
Coinbase x402 protocol. USDC micropayments on Base. Facilitator-verified, settled on-chain. No API keys needed.
USDC on Base
Start querying in 30 seconds
No API keys. No signup. Just USDC and a wallet. pip install x402 and go.