Measured x402 ecosystem data, facilitator reliability, and live endpoint checks.
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Full paid due-diligence audit of an x402 merchant: live probe, price-drift detection between advertised and actual challenge price, settlement history, unique buyer count, and on-chain verification that USDC actually reaches the payTo address. Returns PASS/CAUTION/AVOID with evidence. Costs $0.01 USDC via x402 — returns payment instructions if called without payment.
Absolute https URL of the x402 resource to audit.
This tool isn't marked read-only, so it may change something on the server or in an account you connected.
Full paid due-diligence audit of an x402 merchant: live probe, price-drift detection between advertised and actual challenge price, settlement history, unique buyer count, and on-chain verification that USDC actually reaches the payTo address. Returns PASS/CAUTION/AVOID with evidence. Costs $0.01 USDC via x402 — returns payment instructions if called without payment.
| Argument | Type | Description |
|---|---|---|
| url* | string | Absolute https URL of the x402 resource to audit. |
{
"type": "object",
"required": [
"url"
],
"properties": {
"url": {
"type": "string",
"description": "Absolute https URL of the x402 resource to audit."
}
},
"additionalProperties": false
}Check whether an x402 endpoint is alive and emits a valid HTTP 402 payment challenge, before you pay it. Free liveness check. Returns reachability, status code and whether a valid challenge was found.
| Argument | Type | Description |
|---|---|---|
| url* | string | Absolute https URL of the x402 resource to check. |
{
"type": "object",
"required": [
"url"
],
"properties": {
"url": {
"type": "string",
"description": "Absolute https URL of the x402 resource to check."
}
},
"additionalProperties": false
}Which x402 facilitators actually settle payments, measured by probing each with a real signed EIP-3009 payload. Tells you which are keyless, which need API keys, which are testnet-only and which are unreachable. Free. Use before choosing a facilitator.
No arguments.
{
"type": "object",
"properties": {},
"additionalProperties": false
}Current gas price and estimated simple-transfer cost for an EVM chain. Free preview route. Supports base, polygon, arbitrum, optimism, ethereum.
| Argument | Type | Description |
|---|---|---|
| chain | string | Which chain to query. Defaults to base. |
{
"type": "object",
"properties": {
"chain": {
"enum": [
"base",
"polygon",
"arbitrum",
"optimism",
"ethereum"
],
"type": "string",
"description": "Which chain to query. Defaults to base."
}
},
"additionalProperties": false
}Get measured statistics about the x402 ecosystem economy: total 30-day revenue across sampled resources, revenue concentration, revenue at a given rank, price distribution and payer concentration. Free. Use this to decide whether building or buying on x402 is worth it.
No arguments.
{
"type": "object",
"properties": {},
"additionalProperties": false
}List x402 merchants that have been VERIFIED to accept payment — each one actually paid with real USDC on Base, with the settlement transaction hash. This is different from a liveness probe: public censuses only check whether a 402 is emitted, not whether paying works. Use this to find endpoints that will actually serve you. Free.
No arguments.
{
"type": "object",
"properties": {},
"additionalProperties": false
}