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ProvenPaid x402 Endpoint Trust Check
x402
ProvenPaid x402 Endpoint Trust Check is a paid API for AI agents from api.provenpaid.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-12).
Checks whether a given x402 payment endpoint has real payment history on Base before you pay it, returning payer stats, x402 challenge validation, and on-chain evidence.
Price / call$0.01
Success—
StatusUnknown
How this service works
Call before paying an unfamiliar x402 endpoint to see whether anyone actually pays it. Pass ?url=<endpoint URL>. ProvenPaid reads public Base data for the endpoint's receiving address: distinct payers, x402-style payments, repeat-payer share, payer concentration and coverage over 30 days. It also validates the x402 challenge (v1/v2; MPP detected) without paying. Each item has source and timestamp. Evidence, not a verdict. Not charged for invalid or unsafe URLs.
Output
Returns on-chain evidence items from Base about the endpoint's receiving address: number of distinct payers, count of x402-style payments, share of repeat payers, payer concentration metrics, and 30-day coverage window. Also returns whether the x402 challenge (v1/v2, including MPP) validates successfully without making a payment. Each evidence item includes its source and timestamp. Does not return a pass/fail verdict — provides raw evidence for the caller to interpret.
Example use cases
Vet unknown paid agent before calling
“I found an x402 endpoint at https://api.strangeagent.com/v1/search that costs $0.05 per call — can you check if real people have actually paid it on Base before I send any money?”
Detect scam or honeypot API listing
“This API listing at https://api.suspicious-tools.io/v1/run looks sketchy — can you pull its x402 payment history and payer stats from ProvenPaid to see if it's ever had legitimate traffic?”
Evaluate payer concentration before integration
“We're thinking of integrating https://api.partnerservice.xyz/v1/data into our agent — can you check ProvenPaid for its 30-day payer coverage, repeat-payer share, and whether the x402 challenge validates cleanly?”
Technical details
Endpoint
GEThttps://api.provenpaid.com/v1/check?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent or developer needs to assess whether an unfamiliar x402-gated API has been legitimately used before committing a payment. It is the right choice when you want on-chain payer evidence, x402 challenge validation, and payer behavior metrics (concentration, repeat rate) from Base without executing a financial transaction. Prefer it over blind trust or manual blockchain exploration when evaluating third-party paid agent endpoints in an autonomous workflow.
Side effects
- Invalid or malformed URL returns no charge and an error response
- Unsafe URLs (private IPs, localhost, etc.) are rejected without charge
- Endpoint receiving address has no on-chain history — returns empty evidence set
- x402 challenge validation fails if endpoint is unreachable or misconfigured
- Network or Base RPC errors may cause partial data or timeout
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"url": "https://api.example.com/paid-endpoint",
"probe": {
"rails": [
"x402:v2"
],
"valid": true,
"status": 402,
"challenge": {
"offers": [
{
"pay_to": "0x1111111111111111111111111111111111111111",
"scheme": "exact",
"network": "eip155:8453",
"amount_atomic": 10000
}
],
"version": 2
}
},
"onchain": [
{
"pay_to": "0x1111111111111111111111111111111111111111",
"status": "ok",
"network": "eip155:8453",
"coverage": {
"complete": true,
"fraction": 1
},
"x402_style": {
"transfers": 120,
"distinct_payers": 14,
"top1_payer_share": 0.3,
"median_amount_usdc": 0.01,
"repeat_payer_share": 0.5
},
"all_usdc_in": {
"transfers": 131,
"distinct_payers": 17
},
"excluded_payers": 0
}
],
"checked_at": 1791331200,
"methodology": "/methodology",
"payer_depth": [
{
"pay_to": "0x1111111111111111111111111111111111111111",
"network": "eip155:8453",
"statement": "14 distinct payers made 120 x402-style USDC payments to this receiving address in the last 30 days.",
"window_days": 30,
"x402_payments": 120,
"top1_payer_share": 0.3,
"coverage_complete": true,
"coverage_fraction": 1,
"repeat_payer_share": 0.5,
"x402_distinct_payers": 14
}
]
}
}Tags
x402
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