Discover / chess-eval.x402supply.com

chess-eval.x402supply.com

■ Challenge detected

Evaluate a chess position with Stockfish: best move, centipawn/mate score, principal variation, and optional multipv. No mocks — a real single-threaded Stockfish 10 (asm.js) runs in-isolate per call.

x402
Base
USDC

Listed price: $0.01
Challenge detected: 6 of the last 6 checks
Median response: 321 ms
Last checked: 18 Oct, 18:22 UTC
In our index since: 13 Oct 2026

Endpoint

curl -i https://chess-eval.x402supply.com/tools/evaluate_position
# 402 Payment Required: pay with an x402 client (USDC on Base),
# then send the same request again with the payment attached.

1 listed endpoints · on x402 Bazaar

Checks and payment terms on this page refer to the endpoint above. Other listed endpoints have not been checked individually.

POSThttps://chess-eval.x402supply.com/tools/evaluate_position$0.01Evaluate a chess position with Stockfish: best move, centipawn/mate score, principal variation, and optional multipv. No mocks — a real single-threaded Stockfish 10 (asm.js) runs in-isolate per call.

A dash means the listing gives no price or method. Copy buttons copy the full URL.

Showing 1 of 1 listed endpoints.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/chess-eval.x402supply.com

Recent checks

13 Oct 2026One bar per check, showing up to 20 recent checks. Coloured bars show relative response time, with a minimum visible height; full-height grey bars mean no challenge was detected. “Challenge detected” means HTTP 402 or another detected payment-challenge signal.18 Oct 2026

All 6 checks

When (UTC)	Result	HTTP	Response
18 Oct, 18:22 UTC	Challenge detected	402	365ms
17 Oct, 15:20 UTC	Challenge detected	402	392ms
16 Oct, 15:20 UTC	Challenge detected	402	567ms
15 Oct, 12:22 UTC	Challenge detected	402	218ms
14 Oct, 09:20 UTC	Challenge detected	402	276ms
13 Oct, 00:22 UTC	Challenge detected	402	254ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 18 Oct, 18:22 UTC, it returned HTTP 402 or another detected payment-challenge signal. This check did not test payment, delivery or compatibility with the Superstables client.

What price is recorded for chess-eval.x402supply.com?

Its listed price is $0.01.

What payment terms does chess-eval.x402supply.com advertise?

The listing advertises x402, Base and USDC. It names cdp as its facilitator. Check the seller's current payment challenge and authentication requirements before paying.

Where is chess-eval.x402supply.com listed?

In x402 Bazaar. Superstables first indexed it on 13 Oct 2026.

Payment

Protocol: x402 · exact
Chain: Base
Asset: USDC
Amount: 10000 atomic USDC
Paid to: 0x07fF…54EB
Facilitator: cdp

From its payment challenge on 18 Oct 2026.

Check the seller's current payment challenge and authentication requirements before paying. A listing doesn't mean a service works with Superstables. To try a budget or a single purchase, see the services you can try on testnet.

Listed in

x402 Bazaar

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