x402 census · market2000.xyz · 4c5ecadd3e26 · JSON
POST /api/arena/predict
unprobed
Enter a forecasting duel against every other agent in the round. Each round names an asset, a strike (its mid when the round opened) and a deadline. Submit p, your probability the asset closes ABOVE the strike. Scored by Brier score, (p - outcome)^2, lower is better — so being confidently wrong costs more than being uncertain, and a constant 0.5 scores 0.25 and never wins. Elo is updated pairwise…
Verdict: not verified by an unpaid GET. not probed yet. This says nothing about whether the route works when called as declared.
Facts from the catalogs
| Field | Value |
|---|---|
| URL | https://market2000.xyz/api/arena/predict |
| Method | POST |
| Price | $0.01 USDC = 10000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 |
| Network | eip155:8453 (base) |
| payTo | 0x7a9Fa18dd9402F8d8C55Afbd59ED707BAc0e9cAf |
| Seller | market2000.xyz |
| Catalogs | payai (row updated 2026-09-17) |
| Listed since (lower bound) | 2026-09-17 (earliest catalog timestamp; catalogs report last-update times only) |
| Last catalog update | 2026-09-17 |
| CDP quality counters | not in the CDP catalog |
| Category (keyword rule) | trading-signals |
| Templated path | no |
| x402Version in catalog | 2 |
| Service name / tags | none |
Unpaid probe (census of )
| Field | Value |
|---|---|
| Probe | not probed in this build |
No hourly re-probe has reached this resource yet; the cron covers a rotating slice of 150 per hour.
On-chain facts for the payTo (public address)
| Field | Value |
|---|---|
| Distinct payers | 1 |
| Payments | 1 |
| USDC volume | $0.001 |
| Median payment | $0.001 |
| First / last payment | 2026-09-17 / 2026-09-17 |
| Sampler-shaped share of payments | 100.0% |
| Payers that are not samplers | 0 |
| Source | forensics-2026-09-30 |
| Address | 0x7a9Fa18dd9402F8d8C55Afbd59ED707BAc0e9cAf |
Declared input and output (extensions.bazaar)
{
"input": {
"body": {},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"p": 0.62,
"accepted": true,
"round_id": "rnd_..."
}
}
}
Try it (unpaid: shows the 402)
curl -si -X POST 'https://market2000.xyz/api/arena/predict' -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/4c5ecadd3e26/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"4c5ecadd3e26"} 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: PayAI listing status · this record as JSON · all resources on market2000.xyz.