[BATCH+PROOF] MCP server graveyard - servers that vanished from the census

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x2d16a243ba9facc6ac85519d5efad2149dc4c6c3",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "90000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "8qEn3Y3GPXdQ28LHshPa4UYeD8V38Lq9b4jCRirQAY3n",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "90000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "discoverable": true,
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {
          "verifiable": "optional - set to 1 to attach `_hash_core` per row (the canonical pre-image of the record_hash for that row) so you can"
        },
        "type": "http"
      },
      "output": {
        "example": {
          "current": {
            "missing_streak": 0,
            "name": "x711",
            "status": "active"
          },
          "data_age_hours": 422,
          "entity": "(unlocked on payment)",
          "entity_name": "(unlocked on payment)",
          "hash_core_version": 4,
          "lifecycle": {
            "basis": "Imported from the surviving registry (2026-07-25); state is derived from status + missing_streak, 7 consecutive disap...",
            "first_seen": "2026-07-07",
            "last_seen": "2026-07-08",
            "lifespan_days": 1,
            "missing_streak": 0,
            "state": "operating"
          },
          "observed_at": "2026-07-08T00:00:00.000Z",
          "record_hash": "sha256:051650e9a2042e4530442ff7b73a6d8b4d9e943c109994f61a5c92a760e3068f",
          "signal_id": "mcp.server-census",
          "snapshot_date": "2026-07-08",
          "source_ref": "https://github.com/modelcontextprotocol",
          "source_tier": "T2-observable"
        },
        "type": "json"
      }
    },
    "outputSchemaRef": "/manifest",
    "priceUsd": "$0.09",
    "priceUsdNumber": 0.09,
    "routeTemplate": "/mcp/graveyard",
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "properties": {
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "additionalProperties": false,
              "properties": {
                "verifiable": {
                  "description": "optional - set to 1 to attach `_hash_core` per row (the canonical pre-image of the record_hash for that row) so you can recompute and verify fully offline; omitted by default to keep the payload small - for online verification use free GET /gauge/verify?hash=",
                  "type": "string"
                }
              },
              "type": "object"
            },
            "type": {
              "const": "http"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {},
            "type": {
              "const": "json"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      }
    }
  }
}

curl "https://api.truthbear.co/mcp/graveyard"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://api.truthbear.co/mcp/graveyard");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

import httpx
res = httpx.get("https://api.truthbear.co/mcp/graveyard")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header