XUB Agent Market Intelligence – x402 Procurement

x402

XUB Agent Market Intelligence – x402 Procurement is a paid API for AI agents from xub.me, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-22).

Searches and filters the x402 paid-API marketplace to discover available services matching a query, asset, network, and quality criteria.

Price / call$0.01

Seller volume →—

Success—

StatusUnknown

How this service works

Machine-first x402 procurement intelligence and paid utilities.

Output

Returns a JSON object containing the matched service candidates (array), total indexed resources count, applied filters (asset, network, minQuality, requireHttps), the procurement strategy used, and timestamps for when the data was checked and captured.

Example use cases

Discover AI tools on Base

“Find me up to 10 x402 AI tools available on the Base network that accept USDC and have a quality score of at least 60 — I only want HTTPS endpoints.”

Locate data enrichment APIs

“Search the x402 marketplace for data enrichment services — give me the top 5 results, require HTTPS, and filter to quality 70 or above on any network.”

Audit available x402 index size

“Query the x402 market for all services with no filter on asset or network and tell me how many resources are indexed total — I want to understand the breadth of the marketplace.”

Technical details

Endpoint

POSThttps://xub.me/api/tools/x402-procure/invoke?utm_source=zero.xyz

When to prefer

Use this endpoint when an AI agent needs to programmatically discover and evaluate x402-compatible paid APIs on specific blockchain networks, filter by asset type, quality threshold, or HTTPS requirement, and retrieve structured procurement intelligence — especially when building autonomous agent pipelines that need to self-select and pay for downstream tools at runtime.

Side effects

No candidates matched — returns matched:0 and empty candidates array when filters are too restrictive
Invalid asset address format — may return empty results or validation error
Query string too short (under 2 chars) or missing alphanumeric characters — rejected by pattern validation
Network string not recognized — may return zero results
Limit out of range (below 1 or above 10) — schema validation error
Payment failure — endpoint costs $0.01 USDC per call via x402; unpaid requests may be rejected with 402 status

Input

Schema · Request body

Field	Type	Description
asset	string	Exact asset address or advertised asset name, for example USDC.
limit	integer
query	string
network	string
minQuality	integer
requireHttps	boolean

Output

Schema · Response

{
  "type": "json",
  "example": {
    "tool": "x402-procure",
    "result": {
      "query": "web search",
      "dataset": "x402-market",
      "filters": {
        "asset": null,
        "network": "eip155:8453",
        "minQuality": 55,
        "requireHttps": true
      },
      "matched": 0,
      "strategy": "procurement-v1",
      "checkedAt": null,
      "candidates": [],
      "capturedAt": null,
      "indexedResources": 0
    },
    "version": "1"
  }
}

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How this service works

Machine-first x402 procurement intelligence and paid utilities.

Output

Example use cases

Discover AI tools on Base

“Find me up to 10 x402 AI tools available on the Base network that accept USDC and have a quality score of at least 60 — I only want HTTPS endpoints.”

Locate data enrichment APIs

“Search the x402 marketplace for data enrichment services — give me the top 5 results, require HTTPS, and filter to quality 70 or above on any network.”

Audit available x402 index size

“Query the x402 market for all services with no filter on asset or network and tell me how many resources are indexed total — I want to understand the breadth of the marketplace.”

Technical details

Endpoint

POSThttps://xub.me/api/tools/x402-procure/invoke?utm_source=zero.xyz

When to prefer

Side effects

No candidates matched — returns matched:0 and empty candidates array when filters are too restrictive
Invalid asset address format — may return empty results or validation error
Query string too short (under 2 chars) or missing alphanumeric characters — rejected by pattern validation
Network string not recognized — may return zero results
Limit out of range (below 1 or above 10) — schema validation error
Payment failure — endpoint costs $0.01 USDC per call via x402; unpaid requests may be rejected with 402 status

Input

Schema · Request body

Field	Type	Description
asset	string	Exact asset address or advertised asset name, for example USDC.
limit	integer
query	string
network	string
minQuality	integer
requireHttps	boolean

Output

Schema · Response

{
  "type": "json",
  "example": {
    "tool": "x402-procure",
    "result": {
      "query": "web search",
      "dataset": "x402-market",
      "filters": {
        "asset": null,
        "network": "eip155:8453",
        "minQuality": 55,
        "requireHttps": true
      },
      "matched": 0,
      "strategy": "procurement-v1",
      "checkedAt": null,
      "candidates": [],
      "capturedAt": null,
      "indexedResources": 0
    },
    "version": "1"
  }
}