Roundhouse AI

spawnxchange.com

Agentic-first marketplace for reusable AI-built software.

OtherLiveeip155:8453Exactvia cdp
https://spawnxchange.com/api/v1/items/:uuid/acquire
Calls · 30d
6→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far.
$4.25
Verified settled volume
4 settlements proven x402 by their on-chain EIP-3009 marker.
$1.00
Listed price
As published in the catalog. Always read the live 402 before paying.
6
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-09-01 06:30Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x91AAa2D70F1845586b331a0e28762eeFBA65cdE1

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

1USDC≈ $1 USD
on Base · exact scheme

Pay 1 USDC on Base to 0x91AA…5cdE1. The signed payment is good for 5 minutes.

Paid to
0x91AA…5cdE1
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
1000000 smallest units
Buys
Buy the selected AI-generated code artifact. Paying this authorization grants you a licence and returns an instant download link plus an invoice.
Returns
application/zip
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "legal": {
        "terms": {
          "url": "https://spawnxchange.com/terms/v1",
          "version": "v1",
          "acceptanceField": "policy_accepted"
        },
        "license": {
          "url": "https://spawnxchange.com/license/v1",
          "version": "v1",
          "acceptanceField": "license_accepted"
        }
      },
      "version": "2",
      "assetTransferMethod": "eip3009"
    },
    "payTo": "0x91AAa2D70F1845586b331a0e28762eeFBA65cdE1",
    "amount": "1000000",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/zip",
    "resource": "https://spawnxchange.com/api/v1/items/0ad6e69a-af04-428e-83fc-6a6125e26da7/acquire",
    "description": "Buy the selected AI-generated code artifact. Paying this authorization grants you a licence and returns an instant download link plus an invoice.",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "chain": "base",
          "policy_accepted": true,
          "license_accepted": true
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json",
        "prompt_request": {
          "example": {},
          "examples": {
            "chain_only": {
              "chain": "base"
            },
            "empty_json": {}
          },
          "optional": [
            "chain"
          ],
          "body_optional": true,
          "supported_chains": [
            "base",
            "polygon"
          ],
          "body_omitted_allowed": true
        },
        "completion_request": {
          "example": {
            "chain": "base",
            "currency": "USDC",
            "policy_accepted": true,
            "license_accepted": true
          },
          "defaults": {
            "currency": "USDC"
          },
          "required": [
            "chain",
            "policy_accepted",
            "license_accepted"
          ],
          "supported_chains": [
            "base",
            "polygon"
          ],
          "supported_currencies": [
            "USDC"
          ]
        }
      },
      "output": {
        "type": "json",
        "example": {
          "order_id": "00000000-0000-4000-8000-000000000000",
          "expires_in": "15 minutes",
          "invoice_url": "https://storage.googleapis.com/…signed-invoice-url…",
          "download_url": "https://storage.googleapis.com/…signed-package-url…"
        }
      }
    },
    "legal": {
      "terms": {
        "url": "https://spawnxchange.com/terms/v1",
        "version": "v1",
        "acceptanceField": "policy_accepted"
      },
      "license": {
        "url": "https://spawnxchange.com/license/v1",
        "version": "v1",
        "acceptanceField": "license_accepted"
      }
    },
    "itemId": "0ad6e69a-af04-428e-83fc-6a6125e26da7",
    "schema": {
      "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": "object",
              "required": [
                "chain",
                "policy_accepted",
                "license_accepted"
              ],
              "properties": {
                "chain": {
                  "enum": [
                    "base",
                    "polygon"
                  ],
                  "type": "string"
                },
                "currency": {
                  "enum": [
                    "USDC",
                    "usdc"
                  ],
                  "type": "string"
                },
                "policy_accepted": {
                  "type": "boolean",
                  "const": true
                },
                "license_accepted": {
                  "type": "boolean",
                  "const": true
                }
              },
              "additionalProperties": false
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "POST",
                "PUT",
                "PATCH"
              ],
              "type": "string"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "required": [
                "order_id",
                "download_url",
                "invoice_url",
                "expires_in"
              ],
              "properties": {
                "order_id": {
                  "type": "string",
                  "format": "uuid"
                },
                "expires_in": {
                  "type": "string"
                },
                "invoice_url": {
                  "type": "string",
                  "format": "uri"
                },
                "download_url": {
                  "type": "string",
                  "format": "uri"
                }
              },
              "additionalProperties": false
            }
          }
        }
      }
    },
    "provider": {
      "tags": [
        "software",
        "code",
        "marketplace",
        "license"
      ],
      "serviceName": "SpawnXchange Direct Public Purchase"
    },
    "routeTemplate": "/api/v1/items/:uuid/acquire"
  },
  "payment-identifier": {
    "required": false
  }
}

Provenance

Seen in the source catalog
2026-09-01 06:30Z
Last indexed by Roundhouse
2026-09-25 10:20Z
Last enriched (probe, favicon, geo)
2026-09-12 01:16Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 405
Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show the prompt
Using Roundhouse, look up the x402 service spawnxchange.com and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=spawnxchange.com'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://spawnxchange.com/api/v1/items/:uuid/acquire, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402,
or use an organization key from https://roundhouseai.io/dashboard/team.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.