# 10x402.com x402 Resource Presence Checker

> 10x402.com x402 Resource Presence Checker is a paid API for AI agents from 10x402.com, paid per call via x402, $0.06/call, status unknown (last checked 2026-09-13).

Checks where a live x402 resource stands across registries (Bazaar, x402scan) and on-chain settlement activity

## Facts

- Endpoint: POST https://10x402.com/presence
- Price: $0.06/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/10x402-com-x402-resource-presence-checker-d4dc189d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DKMAYrbHzH802s3GrstL4

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 10x402-com-x402-resource-presence-checker-d4dc189d -d '<json body>'
```

Example prompt: Check where https://api.myservice.com/premium-data stands across the x402 registries — I want to know if it's listed on Bazaar, indexed on x402scan, and whether there's any on-chain settlement activity for it.

## When to prefer this

Use this endpoint when you need to cross-check a specific x402 resource's presence across multiple registries simultaneously and also want on-chain settlement evidence in a single call. Prefer it over manually querying Bazaar or x402scan separately, especially when you need a unified presence report for auditing, debugging indexing issues, or confirming that a newly deployed x402 endpoint is discoverable by payers.

## Known failure modes

- URL is not a live x402 resource — registry returns not_found across all registries
- The target URL is unreachable or returns an unexpected response — lookup fails with an error
- Registry APIs are temporarily unavailable — some verdicts return as unknown
- Malformed JSON body — endpoint returns a validation error
- URL parameter missing from the request body — required field error

## How this service works

Where a live x402 resource stands with the registries — Bazaar, x402scan, and on-chain

## Output

A JSON presence report containing per-registry verdicts (listed, not_found, or unknown) with supporting evidence for each registry (Bazaar, x402scan), on-chain settlement activity data, and an overall summary of the resource's discoverability and payment history.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "string",
     "maxLength": 262144,
     "description": "a JSON object: { \"url\": \"https://…\" } — the live x402 resource to look up — and optionally { \"method\": \"POST\" | \"GET\" }, default POST, up to 256 KB"
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "type": "string",
     "const": "POST"
    },
    "bodyType": {
     "type": "string",
     "const": "text"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type",
    "format"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "text"
    },
    "format": {
     "type": "string",
     "const": "application/json",
     "description": "a JSON presence report: per-registry verdicts (listed | not_found | unknown) with evidence, on-chain settlement activity, and a summary"
    },
    "example": {
     "type": "string",
     "description": "the sample request body above, actually run through this endpoint — or, when that run is larger than a response header should carry, an object naming its size and the free URL it is published at in full"
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/10x402-com-x402-resource-presence-checker-d4dc189d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 10x402.com](https://www.zero.xyz/host/10x402.com/llms.txt)