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x402 Trust: Similar Endpoint Finder
x402
x402 Trust: Similar Endpoint Finder is a paid API for AI agents from x402-trust.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Returns semantically similar x402 endpoints that score higher than a given subject endpoint, ranked by trust grade and similarity
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
A JSON object containing the subject endpoint's grade and score, plus a ranked list of semantically similar endpoints that outscore it. Each alternative includes a letter grade (A–F), numeric trust score, network chain ID, USDC price, cosine similarity to the subject, a link to the full endpoint page on x402-trust.com, whether a price ceiling applies, and a proceed/caution recommendation.
Example use cases
Upgrade from low-grade API
“The x402 endpoint I'm using at https://api.mediocre.com/v1/transcribe has a C grade — find me up to 3 similar endpoints that score higher so I can switch to something more reliable.”
Benchmark endpoint against peers
“Can you pull up to 10 x402 endpoints that are semantically similar to https://api.example.com/v1/sentiment and show me how they rank compared to it by trust score?”
Vet alternatives before integration
“Before I build against https://api.startup.io/v1/weather, show me up to 5 similar x402 endpoints that outrank it — I want to make sure I'm picking the best-scored option available.”
Technical details
Endpoint
POSThttps://x402-trust.com/v1/similarWhen to prefer
Use this endpoint when you already have an x402 endpoint URL and want to discover higher-quality alternatives ranked by real monitored trust data — uptime, compliance, on-chain settlement volume, and price history. Prefer this over generic API directories when you need trust-scored, x402-specific recommendations with semantic similarity matching rather than keyword search.
Side effects
- Unknown or unindexed endpoint URL returns empty alternatives list or 404
- Invalid resource URL format causes validation error
- limit parameter too large may be capped or return fewer results
- Payment failure (insufficient USDC) results in 402 response with no data
- Endpoint not yet vectorized returns subject with vectorized:false and no alternatives
- Network timeout if probe data is stale or service is under load
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-trust.com/endpoint/12345",
"priceCeiling": false,
"recommendation": "proceed"
}
]
}
}Tags
x402
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