com.x402supply/chess-eval

https://chess-eval.x402supply.com/mcp

Stockfish chess eval: best move, score, principal variation, multipv. $0.005/call via x402.

55
reliability

Reliability & health

Uptime and response time from our own unpaid probes, plus the reliability score built from them.

7 days 30 days

Uptime

100.0% avg
0% 50% 100% Jul 24Aug 3Aug 12Aug 22

Response time

p50 185ms · p95 222ms
0ms 150ms 300ms Jul 24Aug 3Aug 12Aug 22
Data table
Reliability history per time bucket over the last 30 days (daily).
Bucket Uptime Probes Response time
7/24/2026, 12:00:00 AM 100% 1 191ms
7/25/2026, 12:00:00 AM 100% 1 186ms
7/26/2026, 12:00:00 AM 100% 1 196ms
7/27/2026, 12:00:00 AM 100% 1 170ms
7/28/2026, 12:00:00 AM 100% 1 169ms
7/29/2026, 12:00:00 AM 100% 1 203ms
7/30/2026, 12:00:00 AM 100% 1 197ms
7/31/2026, 12:00:00 AM 100% 1 170ms
8/1/2026, 12:00:00 AM 100% 1 190ms
8/2/2026, 12:00:00 AM 100% 1 170ms
8/3/2026, 12:00:00 AM 100% 1 191ms
8/4/2026, 12:00:00 AM 100% 1 175ms
8/5/2026, 12:00:00 AM 100% 1 215ms
8/6/2026, 12:00:00 AM 100% 1 179ms
8/7/2026, 12:00:00 AM 100% 1 203ms
8/8/2026, 12:00:00 AM 100% 1 208ms
8/9/2026, 12:00:00 AM 100% 1 186ms
8/10/2026, 12:00:00 AM 100% 1 192ms
8/11/2026, 12:00:00 AM 100% 1 180ms
8/12/2026, 12:00:00 AM 100% 1 198ms
8/13/2026, 12:00:00 AM 100% 1 182ms
8/14/2026, 12:00:00 AM 100% 1 184ms
8/15/2026, 12:00:00 AM 100% 1 201ms
8/16/2026, 12:00:00 AM 100% 1 188ms
8/17/2026, 12:00:00 AM 100% 1 194ms
8/18/2026, 12:00:00 AM 100% 1 236ms
8/19/2026, 12:00:00 AM 100% 21 192ms
8/20/2026, 12:00:00 AM 100% 21 189ms
8/21/2026, 12:00:00 AM 100% 22 188ms
8/22/2026, 12:00:00 AM 100% 2 184ms
55
Composite reliability — the weighted average of the dimensions below, on a 0–100 scale.
Availability
100

How often it was reachable when we probed it (weight 35%).

Latency
100

How quickly it answers when it is up — fast scores high (weight 20%).

Security
100

Whether it serves over working TLS / https (weight 15%).

Transparency
61

Whether the operator disclosed what it does — description, schema, identity (weight 15%).

Activity
not yet measured

Observed on-chain payments to this endpoint's wallet — transactions, volume, and distinct paying wallets over the last month (weight 15%; not yet measured when we have not seen its wallet settle).

Confidence 100% — how much probe evidence backs this score. A thin history is flagged, not hidden.

See the scoring methodology for exactly how each number is computed.

Payment

Currencies
—
Networks
—
Facilitator
unknown
SDK
unknown

Operator

Company
inferred — unknown
Jurisdiction
—
Registrar
—
Domain registered
—
Hosting network
CLOUDFLARENET
Hosting country
—

Operator context is derived from public RDAP/TLS records and unverified. Company and country are only available for endpoints that publish them (an OV/EV TLS certificate or a non-redacted domain record); most endpoints are CDN-fronted and disclose neither.

Response schema 
{
  "oneOf": [
    {
      "description": "JSON-RPC 2.0 response envelope. `result.content[0].text` is a JSON-encoded string matching the schema in `x-mcp-result-schema`.",
      "properties": {
        "id": {
          "type": [
            "string",
            "number"
          ]
        },
        "jsonrpc": {
          "const": "2.0"
        },
        "result": {
          "properties": {
            "content": {
              "items": {
                "properties": {
                  "text": {
                    "type": "string"
                  },
                  "type": {
                    "const": "text"
                  }
                },
                "type": "object"
              },
              "type": "array"
            }
          },
          "type": "object"
        }
      },
      "type": "object",
      "x-mcp-result-schema": {
        "properties": {
          "bestMove": {
            "type": [
              "string",
              "null"
            ]
          },
          "bestMoveSan": {
            "type": [
              "string",
              "null"
            ]
          },
          "depthReached": {
            "type": "integer"
          },
          "engine": {
            "type": "string"
          },
          "evalCp": {
            "description": "Centipawn score from the side-to-move's perspective, omitted if mateIn is set",
            "type": "number"
          },
          "fenEchoed": {
            "type": "string"
          },
          "mateIn": {
            "description": "Moves to mate from the side-to-move's perspective (negative = getting mated), omitted if evalCp is set",
            "type": "integer"
          },
          "multipv": {
            "items": {
              "properties": {
                "evalCp": {
                  "description": "Centipawn score from the side-to-move's perspective, omitted if mateIn is set",
                  "type": "number"
                },
                "mateIn": {
                  "description": "Moves to mate from the side-to-move's perspective (negative = getting mated), omitted if evalCp is set",
                  "type": "integer"
                },
                "move": {
                  "type": "string"
                },
                "moveSan": {
                  "type": "string"
                },
                "pv": {
                  "items": {
                    "type": "string"
                  },
                  "type": "array"
                }
              },
              "required": [
                "move",
                "moveSan",
                "pv",
                "pvUci"
              ],
              "type": "object"
            },
            "type": "array"
          },
          "pv": {
            "description": "Principal variation in SAN",
            "items": {
              "type": "string"
            },
            "type": "array"
          },
          "pvUci": {
            "items": {
              "type": "string"
            },
            "type": "array"
          },
          "status": {
            "enum": [
              "ok",
              "checkmate",
              "stalemate",
              "draw"
            ],
            "type": "string"
          },
          "timedOut": {
            "type": "boolean"
          }
        },
        "required": [
          "status",
          "bestMove",
          "pv",
          "depthReached",
          "timedOut",
          "multipv",
          "engine",
          "fenEchoed"
        ],
        "type": "object"
      }
    },
    {
      "description": "JSON-RPC 2.0 response envelope. `result.content[0].text` is a JSON-encoded string matching the schema in `x-mcp-result-schema`.",
      "properties": {
        "id": {
          "type": [
            "string",
            "number"
          ]
        },
        "jsonrpc": {
          "const": "2.0"
        },
        "result": {
          "properties": {
            "content": {
              "items": {
                "properties": {
                  "text": {
                    "type": "string"
                  },
                  "type": {
                    "const": "text"
                  }
                },
                "type": "object"
              },
              "type": "array"
            }
          },
          "type": "object"
        }
      },
      "type": "object",
      "x-mcp-result-schema": {
        "properties": {
          "depthReached": {
            "type": "integer"
          },
          "engine": {
            "type": "string"
          },
          "fenEchoed": {
            "type": "string"
          },
          "line": {
            "items": {
              "properties": {
                "depthReached": {
                  "type": "integer"
                },
                "evalCp": {
                  "description": "Centipawn score from the side-to-move's perspective, omitted if mateIn is set",
                  "type": "number"
                },
                "mateIn": {
                  "description": "Moves to mate from the side-to-move's perspective (negative = getting mated), omitted if evalCp is set",
                  "type": "integer"
                },
                "move": {
                  "type": "string"
                },
                "ply": {
                  "type": "integer"
                },
                "san": {
                  "type": "string"
                }
              },
              "required": [
                "ply",
                "move",
                "san",
                "depthReached"
              ],
              "type": "object"
            },
            "type": "array"
          },
          "status": {
            "enum": [
              "ok",
              "checkmate",
              "stalemate",
              "draw"
            ],
            "type": "string"
          },
          "timedOut": {
            "type": "boolean"
          }
        },
        "required": [
          "status",
          "line",
          "depthReached",
          "timedOut",
          "engine",
          "fenEchoed"
        ],
        "type": "object"
      }
    }
  ]
}