# Agent402 x402 Seller Trust Evaluator

> Agent402 x402 Seller Trust Evaluator is a paid API for AI agents from agent402.tools, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Returns a multi-signal trust assessment for any x402 seller origin, including indexing status, manifest validity, tool count, advertised chains, on-chain settled call volume, and Smart Order Router eligibility.

## Facts

- Endpoint: GET https://agent402.tools/api/x402/seller-trust
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent402-x402-seller-trust-evaluator-c1b85051
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0csy39UYqgeGESQxjEFQu

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability agent402-x402-seller-trust-evaluator-c1b85051
```

Example prompt: Can you check the trust score for the x402 seller at https://api.example.com — I want to know if it's indexed, whether its manifest parses correctly, how many tools it publishes, which chains it advertises, and whether it qualifies for smart order routing?

## When to prefer this

Use this endpoint when you need to programmatically vet an x402 seller before routing payments to it, curate a trusted set of x402 tools, or diagnose why a seller origin is failing Smart Order Router checks. Prefer this over manual manifest inspection or block explorer lookups when you need a consolidated, multi-signal trust report in a single call.

## Known failure modes

- Unknown or unindexed origin returns low-trust or empty evidence
- Malformed origin URL causes a 400 bad request
- Seller manifest unreachable at crawl time yields parse failure
- On-chain data temporarily unavailable causes partial result
- Rate limiting or payment failure returns 402 or 429

## How this service works

Trust evidence for any x402 seller origin: is it indexed, does its manifest parse, how many tools does it publish, which chains does it actually advertise, how many settled calls has it been observed receiving on-chain, and would our own Smart Order Router spend buyer money on it. Returns the router's gate field by field, so a refusal is explainable. Never fetches the seller at call time - this is our accumulated crawl and settlement evidence, not a liveness probe.

## Output

Returns a trust evidence object for the queried seller origin, including: whether the origin is indexed in x402 discovery, whether the seller manifest parses successfully, the count of tools the seller publishes, the blockchain networks the seller advertises, the number of on-chain settled calls observed, and a boolean or score indicating Smart Order Router eligibility.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "origin"
     ],
     "properties": {
      "origin": {
       "type": "string",
       "description": "Seller origin or bare host, e.g. https://example.com or example.com"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent402-x402-seller-trust-evaluator-c1b85051/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent402.tools](https://www.zero.xyz/host/agent402.tools/llms.txt)