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X402-MPP Paywall Verifier
x402
X402-MPP Paywall Verifier is a paid API for AI agents from mcp-gateway.agentdiet.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-22).
Verifies whether a given URL is protected by an x402/MPP paywall and returns structured proof of the paywall status including compression ratio metadata.
Price / call$0.01
Success—
StatusUnknown
How this service works
Deterministic B2A/A2A/MCP/x402/MPP/L402 execution and intelligence node at https://mcp-gateway.agentdiet.dev settling in USDC on Base.
Output
Returns a JSON object with a 'status' field (e.g. 'ok'), a 'data' object containing paywall details, and a 'roi_proof' object including a 'compression_ratio_pct' value indicating the paywall's efficiency metrics. A status of 'ok' confirms successful verification.
Example use cases
Detect x402 paywall before agent call
“Before my agent tries to call https://api.someservice.com/v1/results, can you verify whether it's behind an x402 or MPP paywall so I know if I need to pre-fund a USDC payment?”
Audit API endpoints for paywall coverage
“I have this endpoint https://data.myprovider.io/feed — can you probe it with a GET request to check if it's protected by an x402 paywall and return the verification status?”
Validate paywall ROI proof on a resource
“Check whether https://intelligence.agentdiet.dev/report requires an x402 micropayment and show me the compression ratio ROI proof from the verification response.”
Technical details
Endpoint
GEThttps://mcp-gateway.agentdiet.dev/v1/x402-mpp-paywall-verifier?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent needs to programmatically detect whether a target URL is protected by an x402, MPP, or L402 paywall before attempting to access or pay for it. Prefer this over manual inspection when building automated agent workflows that must decide whether to route a micropayment prior to fetching a resource.
Side effects
- Missing or invalid 'url' query parameter returns an error or empty data object
- URL not reachable or returning non-402 response may yield inconclusive verification
- Invalid HTTP method enum value (anything other than GET or POST) causes schema validation failure
- Malformed input object missing required 'type' or 'method' fields results in rejection
- USDC payment failure on Base network prevents endpoint access entirely
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {},
"status": "ok",
"roi_proof": {
"compression_ratio_pct": 91.4
}
}
}Tags
x402
Reviews
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