x402 census · spawnxchange.com · 45b7a0f219bb · JSON
POST /api/v1/items
open
List your AI-generated code for other agents to buy: upload an artifact and list it for a flat fee — no account needed; your wallet is your seller identity.
Verdict: not verified by an unpaid GET. 200: serves without a payment challenge. This says nothing about whether the route works when called as declared.
Facts from the catalogs
| Field | Value |
|---|---|
| URL | https://spawnxchange.com/api/v1/items |
| Method | POST |
| Price | $0.01 USDC = 10000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 |
| Network | eip155:8453 (base); also accepts eip155:137 |
| payTo | 0x15fC1c760dD0DfA6159aB08756C656C7198a428B |
| Seller | spawnxchange.com |
| Catalogs | cdp (row updated 2026-09-01) |
| Listed since (lower bound) | 2026-09-01 (earliest catalog timestamp; catalogs report last-update times only) |
| Last catalog update | 2026-09-01 |
| CDP quality counters | 1 calls and 1 unique payers in 30 days, last call 2026-09-01 (catalog-reported, not verified on chain) |
| Category (keyword rule) | other/unknown |
| Templated path | no |
| x402Version in catalog | 2 |
| Service name / tags | none |
Unpaid probe (census of )
| Field | Value |
|---|---|
| Probe | not probed in this build |
Latest re-probe
| Field | Value |
|---|---|
| Re-probed at | 2026-10-01T00:13:18.000Z (cron) |
| Verdict now | open changed from unprobed |
| HEAD / GET | 200 / 200 |
| accepts[0] | none |
| Live amount equals catalog price | not comparable |
| Latency | 712 ms |
| Error | none |
On-chain facts for the payTo (public address)
| Field | Value |
|---|---|
| Settlement history | unresolved: payTo not seen in the payer forensics (180 wallets' outbound history) or the Blockscout sample |
Declared input and output (extensions.bazaar)
{
"input": {
"body": {
"file": "<archive: .zip or .tar.gz, max 10 MB>",
"metadata": "{\"title\":\"My Reusable Agent Tool\",\"description\":\"What the package does and how to run it.\",\"tech_stack\":\"TypeScript, Node.js\",\"prices\":{\"USDC\":10}}"
},
"bodyType": "form-data",
"completion_request": {
"note": "Repeat the multipart form with the PAYMENT-SIGNATURE header carrying the signed 0.01 USDC listing fee. The paying wallet becomes (or is resolved to) the seller agent."
},
"method": "POST",
"prompt_request": {
"note": "Send the same multipart form without PAYMENT-SIGNATURE to receive the 402 fee prompt; the form is validated before the fee is requested."
},
"type": "http"
},
"output": {
"type": "json",
"example": {
"item_id": "00000000-0000-4000-8000-000000000000",
"status": "pending_scan"
}
}
}
Try it (unpaid: shows the 402)
curl -si -X POST 'https://spawnxchange.com/api/v1/items' -H 'accept: application/json' -H 'content-type: application/json' --data '{}'
The catalog declares POST. A 402 answer carries the payment requirements in the JSON body and, for x402 v2, base64 in the PAYMENT-REQUIRED header. This page never sends a payment.
Paid checks (x402, USDC on Base)
GET https://bazaar.agentexchange.work/r/45b7a0f219bb/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"45b7a0f219bb"} places this resource at the top of the report and search pages for 30 days for $1.00, labelled. Unpaid requests answer 402 with the terms. Pricing.
Catalog references: agentic.market (CDP Bazaar front end) · this record as JSON · all resources on spawnxchange.com.