Verifx402
An open protocol for verifiable receipts and internet-native payments
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Generate Receipt
View PolicyThe best way to verify digital transactions.
Built around the HTTP 402 status code, Verifx402 enables cryptographically signed receipts for API access without registration, complex OAuth flows, or blockchain interaction.
Cryptographic Integrity
Ed25519 signatures provide cryptographic proof of unmodified content and authentic settlements.
Instant Verification
Verify receipts in milliseconds. Money in your wallet in seconds, not days.
Open Standard
Built on RFC 7515 (JWS) and RFC 7807. Anyone can implement or extend the protocol.
Web Native
Works with any HTTP stack via standard headers and status codes. Simple integration.
Powering Next-Gen Digital Commerce
Verifx402 unlocks new verification models, offering developers and services a frictionless way to prove transactions without complex infrastructure.
AI Agents
Agents can use Verifx402 to generate verifiable payment receipts for API requests in real-time.
Cloud Services
Provide instant access receipts for storage and compute services without account creation.
Content Creators
Issue cryptographic receipts for content access, enabling true micropayment verification.
Simple Integration for Verifiable Receipts
Just a few lines of code to generate cryptographically signed receipts with Ed25519.
Generate a verifiable receipt:
receiptService.create({
issuer: "https://yourapi.com",
subject: "agent-123",
purpose: "api_access",
payment: { amount: "$0.01", scheme: "x402" }
});
// Returns cryptographically signed JWS receiptIf payment required, server responds:
HTTP/1.1 402 Payment Required Verifx402-Receipt: <JWS_TOKEN>
Verifx402 allows any web developer to verify crypto payments without blockchain complexity.
Start Generating ReceiptsReceipt Verifier
Receipt Generator
Create New Receipt
Payment Information (Optional)
Generated Receipt
Verifx402 Policy
Protocol configuration and usage terms
Policy Details
VERSION
1.0
PROTOCOL
verifx402
USAGE
Conditional
Pricing
Price
$0.001/request
Currency
USD
PAYMENT METHODS
x402Limits & Quotas
Requirements
{
"version": "1.0",
"protocol": "verifx402",
"usage": "conditional",
"attribution": "required",
"consent": "optional",
"retention": "30d",
"license": "custom",
"price": "$0.001/request",
"currency": "USD",
"payment_methods": [
"x402"
],
"rate_limit": "1000/hour",
"free_quota": 100,
"quota_period": "1h",
"negotiate_endpoint": "/api/negotiate",
"jwks_endpoint": "/.well-known/jwks.json",
"receipt_header": "Verifx402-Receipt",
"signature_algorithm": "EdDSA",
"hash_algorithm": "SHA-256"
}Implementation Guide
The Verifx402 policy defines the terms, pricing, and requirements for using this service. Clients can fetch this policy programmatically from /.well-known/verifx402.txt
const response = await fetch(/.well-known/verifx402.txt);
const policy = await response.json();
Recent Receipts
vx402_ddde77dfbca6
10/31/2025 at 8:27:08 AM
Subject: ABS
Purpose: research
Verifications: 1
Key: verifx402-1761771620
Expires: 10/31/2025
vx402_57b460b58803
10/31/2025 at 7:18:24 AM
Subject: 21123
Purpose: content_access
Payment: 12 USD
Verifications: 1
Key: verifx402-1761771620
Expires: 10/31/2025
vx402_6e67f920284a
10/31/2025 at 12:37:56 AM
Subject: asdas
Purpose: content_access
Payment: 1 USD
Verifications: 2
Key: verifx402-1761771620
Expires: 10/31/2025
vx402_b937d74661c0
10/31/2025 at 12:37:07 AM
Subject: sdsd
Purpose: ai_training
Verifications: 0
Key: verifx402-1761771620
Expires: 10/31/2025
vx402_5ed74de276b9
10/30/2025 at 11:29:26 PM
Subject: Rr
Purpose: content_access
Verifications: 0
Key: verifx402-1761771620
Expires: 10/31/2025
vx402_cfd04d5ef773
10/30/2025 at 9:45:36 PM
Subject: tok@gmail.com
Purpose: content_access
Payment: 0.01 USD
Verifications: 0
Key: verifx402-1761771620
Expires: 10/31/2025