x402 Pricing Guide

Transparent per-request pricing in USDC for autonomous AI agents. Pay only for what you use.

How x402 Works

1

Agent Makes Request

Your agent calls an HGM API endpoint

2

Server Returns Price

Response includes X-Price header with cost in cents

3

Agent Evaluates Cost

Agent decides whether to proceed or skip

4

Agent Pays & Executes

Send USDC payment and get data instantly

Subscription Tiers

Free

Perfect for testing and learning

$0/month

100/day

  • ✓100 API calls per day
  • ✓3,000 calls per month
  • ✓5 daily opportunities
  • ✓Basic market intelligence
  • ✓Email support

Pro

For active trading agents

$500/month

10,000/day

  • ✓10,000 API calls per day
  • ✓300,000 calls per month
  • ✓All 27 APIs unlocked
  • ✓Real-time WebSocket updates
  • ✓Webhook support
  • ✓20% discount on per-request pricing
  • ✓Dedicated support

Enterprise

For large-scale operations

Custom

Unlimited

  • ✓Unlimited API calls
  • ✓Custom data feeds
  • ✓White-label options
  • ✓50% discount on per-request pricing
  • ✓SLA guarantees
  • ✓Dedicated infrastructure
  • ✓Priority support

Per-Request Pricing

Base Costs (Free Tier)

Opportunities$0.001
Market Intelligence$0.0005
Sentiment Analysis$0.002
Weather Alerts$0.0003
Policy Signals$0.0005

Tier Discounts

Free Tier0%
Pro Tier20%
Enterprise Tier50%

Volume Discounts

Additional discounts apply based on monthly call volume: 5% at 100 calls/month, 10% at 1,000, 15% at 10,000, and 20% at 100,000+ calls/month.

Cost Calculator

0150,000300,000
Estimated Monthly Cost
$0.00/month
Plus subscription fee: $500

Response Headers

Every API response includes pricing information in headers so agents can track costs:

X-Price: 100 # Cost in cents
X-Currency: USDC
X-Payment-Address: 0x4D6a...
X-Request-ID: req_1234567890
X-Expires-At: 1234567890 # Unix timestamp
X-Price-Breakdown: {
"base_cost": 100,
"tier_multiplier": 80,
"volume_discount": 95
}

Real-World Examples

Small Agent (100 calls/month)

Testing and learning

Calls/Month:100
Tier:free
Per-Request Cost:$0.01

Active Agent (10,000 calls/month)

Regular trading operations

Calls/Month:10,000
Tier:pro
Per-Request Cost:$80.00

High-Volume Agent (100,000 calls/month)

Continuous market monitoring

Calls/Month:100,000
Tier:pro
Per-Request Cost:$680.00

Enterprise Agent (1M calls/month)

Full-scale operations

Calls/Month:1,000,000
Tier:enterprise
Per-Request Cost:$2500.00

Frequently Asked Questions

How is pricing calculated?

Base cost per endpoint × tier multiplier × volume discount. All costs are in USDC cents.

Can I switch tiers mid-month?

Yes, tier changes are effective immediately. Pricing adjusts for future calls.

What if I exceed my tier's call limit?

Free tier requests are rate-limited. Pro/Enterprise tiers can exceed limits with overage charges.