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x402.fuchss.app Similar Endpoints Finder
x402
x402.fuchss.app Similar Endpoints Finder is a paid API for AI agents from x402.fuchss.app, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-13).
Given an x402 resource URL, returns semantically similar endpoints that have a higher trust score than the subject, helping agents avoid mediocre services
Price / call$0.005
Success—
StatusUnknown
How this service works
Trust, reputation & reliability scores for x402 endpoints. We monitor every listed x402 service 24/7: uptime probes, 402-envelope compliance, price history, and real on-chain USDC settlement volume. Free grade & recommendation for any endpoint, $0.005 for a full data breakdown.
Output
Returns a JSON object with the subject endpoint's trust profile, a count of alternatives found, and an array of up to 25 alternative x402 endpoints. Each alternative includes its trust score (0-100), letter grade (A-F), cosine similarity to the subject's description, advertised price, and a free endpoint-page URL. Same-host siblings and flagged endpoints are excluded. Returns count=0 with an empty array when nothing beats the subject.
Example use cases
Example prompt
“Before I pay https://some-mediocre.example.com/v1/weather, check if there are up to 5 x402 alternatives that do the same thing but have a trust score at least 10 points higher — I only want ones that clearly beat it.”
Technical details
Endpoint
POSThttps://x402.fuchss.app/v1/similarWhen to prefer
Use this endpoint when an AI agent is about to call or pay for an x402 service and wants to verify it's not settling for a low-quality provider. Ideal before committing payment to any x402 endpoint with an unknown or mediocre trust profile. Prefer this over manual browsing or general search when you need semantically-matched, trust-ranked alternatives with scores and pricing in a single call.
Side effects
- Resource URL not in observation set — endpoint returns error or empty result
- URL is malformed or missing scheme — validation error
- limit out of range (must be 1-25) — rejected with validation error
- minScoreDelta set too high — returns empty alternatives list even if similar endpoints exist
- Network or service unavailability — HTTP 5xx error
- Payment not processed correctly — HTTP 402 returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| limit | integer | |
| resource | string |
Output
Schema · Response
{
"type": "json",
"example": {
"note": "Semantically similar endpoints that out-score the subject. Similarity is cosine over description embeddings.",
"count": 2,
"subject": {
"grade": "C",
"score": 61.2,
"vectorized": true,
"inObservationSet": true
},
"resource": "https://api.example.com/v1/thing",
"alternatives": [
{
"grade": "A",
"score": 88.1,
"network": "eip155:8453",
"resource": "https://api.better.com/v1/thing",
"amountUsd": 0.001,
"similarity": 0.912,
"endpointPage": "https://x402.fuchss.app/endpoint/12345",
"recommendation": "proceed"
}
]
}
}Tags
x402
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