← The evidence ledger
Evidence row 22150
Observed , by baseline/1.
- Kind
- listing
- About
- source_record mcp_registry:com.x402supply/chess-eval
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 6fcefd2a9fe4a866f4e40410fcac95cab4d830f43f378a77659b87597ae900eb
- Leaf
- 0xac24f88e2a5021ba57555a9c5a6211afddb504182ce9aa8d428ef3b48f9cecc3
What was observed
{
"endpoints": [
[
"mcp",
"https://chess-eval.x402supply.com/mcp"
],
[
"web",
"https://x402supply.com/"
]
],
"name": "com.x402supply/chess-eval",
"owner_address": null,
"raw": {
"_meta": {
"io.modelcontextprotocol.registry/official": {
"isLatest": true,
"publishedAt": "2026-07-17T03:41:48.886289Z",
"status": "active",
"statusChangedAt": "2026-07-17T03:41:48.886289Z",
"updatedAt": "2026-07-17T03:41:48.886289Z"
}
},
"server": {
"$schema": "https://static.modelcontextprotocol.io/schemas/2025-09-29/server.schema.json",
"description": "Stockfish chess eval: best move, score, principal variation, multipv. $0.005/call via x402.",
"name": "com.x402supply/chess-eval",
"remotes": [
{
"type": "streamable-http",
"url": "https://chess-eval.x402supply.com/mcp"
}
],
"version": "1.0.1",
"websiteUrl": "https://x402supply.com"
}
},
"source": "mcp_registry",
"summary": "Stockfish chess eval: best move, score, principal variation, multipv. $0.005/call via x402."
}What the leaf hashes
{"body":"6fcefd2a9fe4a866f4e40410fcac95cab4d830f43f378a77659b87597ae900eb","id":22150,"kind":"listing","method":"baseline/1","observed_us":1793025341515048,"prev":null,"subject":"mcp_registry:com.x402supply/chess-eval","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (296695 rows).
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- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae