Truth Bear

Name: Truth Bear
Price: 0.09 USDC
Availability: InStock

[BATCH+PROOF] MCP server graveyard - servers that vanished from the census. THRESHOLD stated plainly: listed on FIRST confirmed absence (confirm_absences=1), not multi-day confirmation; only two snapshot days exist. record_hash is null on these rows (imported from a surviving registry, the original collector never produced hashes). Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. $0.09 per call.

DataLiveeip155:8453Exactvia cdp

https://api.truthbear.co/mcp/graveyard

McpGraveyardNo-data-no-chargeDescriptive-only

Calls · 30d

10↓ 11%

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far.

$741.73

Verified settled volume

3,230 settlements proven x402 by their on-chain EIP-3009 marker.

$0.090

Listed price

As published in the catalog. Always read the live 402 before paying.

Calls · 30d

Upstream's own call count for this endpoint, not ours.

Unique payers · 30d

Last called 2026-09-07 08:52Z

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0x2d16a243ba9facc6ac85519d5efad2149dc4c6c3

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "error": "X-PAYMENT header is required",
  "rails": {
    "available": [
      "base",
      "solana"
    ],
    "advertised": [
      "base"
    ],
    "optin_hint": "Send \"X-Payment-Network: solana\" (or ?rails=all) to receive every available rail in accepts.",
    "optin_header": "X-Payment-Network",
    "also_advertised_as": {
      "note": "This same 402 is offered twice: the v1 challenge in this body, and a v2 challenge in the PAYMENT-REQUIRED header. They are the SAME offer - identical price, asset and payTo - not two competing ones. Pay with whichever version your client speaks; you do not need both.",
      "rails": "The v2 challenge lists the Solana rail without an opt-in, while this v1 body does not. That is deliberate, not a discrepancy: a v1 network:\"solana\" entry makes some v1 clients reject the WHOLE accepts array, so v1 advertises it only on request. A v2 client matches on solana:5eykt4Us... and is unaffected.",
      "header": "PAYMENT-REQUIRED",
      "naming": "The v2 challenge uses CAIP-2 network ids (eip155:8453, solana:5eykt4Us...) where this v1 body uses the legacy short names (base, solana). Same chains, different identifier scheme - CDP couples the naming to the version, so it cannot be mixed.",
      "encoding": "base64 JSON",
      "x402_version": 2
    }
  },
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x2d16a243ba9fAcC6AC85519d5efad2149DC4C6c3",
      "amount": "90000",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://api.truthbear.co/mcp/graveyard",
      "extensions": {
        "bazaar": {
          "info": {
            "input": {
              "type": "http",
              "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 "
              }
            },
            "output": {
              "type": "json",
              "example": {
                "entity": "(unlocked on payment)",
                "current": {
                  "name": "x711",
                  "status": "active",
                  "missing_streak": 0
                },
                "lifecycle": {
                  "basis": "Imported from the surviving registry (2026-07-25); state is derived from status + missing_streak, 7 consecutive disap...",
                  "state": "operating",
                  "last_seen": "2026-07-08",
                  "first_seen": "2026-07-07",
                  "lifespan_days": 1,
                  "missing_streak": 0
                },
                "signal_id": "mcp.server-census",
                "source_ref": "https://github.com/modelcontextprotocol",
                "entity_name": "(unlocked on payment)",
                "observed_at": "2026-07-08T00:00:00.000Z",
                "record_hash": "sha256:051650e9a2042e4530442ff7b73a6d8b4d9e943c109994f61a5c92a760e3068f",
                "source_tier": "T2-observable",
                "snapshot_date": "2026-07-08",
                "data_age_hours": 422,
                "hash_core_version": 4
              }
            }
          },
          "schema": {
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "properties": {
              "input": {
                "type": "object",
                "required": [
                  "type",
                  "method"
                ],
                "properties": {
                  "type": {
                    "const": "http"
                  },
                  "method": {
                    "enum": [
                      "GET"
                    ],
                    "type": "string"
                  },
                  "queryParams": {
                    "type": "object",
                    "properties": {
                      "verifiable": {
                        "type": "string",
                        "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="
                      }
                    },
                    "additionalProperties": false
                  }
                }
              },
              "output": {
                "type": "object",
                "required": [
                  "type"
                ],
                "properties": {
                  "type": {
                    "const": "json"
                  },
                  "example": {}
                }
              }
            }
          },
          "priceUsd": "$0.09",
          "discoverable": true,
          "outputSchema": {
            "type": "object",
            "properties": {
              "count": {
                "type": "integer"
              },
              "deaths": {
                "type": "array"
              },
              "provenance": {
                "type": "object",
                "description": "Freshness and lineage: freshness / freshness_basis / age_hours_now / data_lineage, with the oldest row representing the whole batch"
              },
              "observed_at": {
                "type": [
                  "string",
                  "null"
                ],
                "description": "Observation time of the OLDEST row in this batch (ISO) - the most conservative basis"
              },
              "record_hash_verifiable": {
                "type": "object"
              }
            }
          },
          "routeTemplate": "/mcp/graveyard",
          "priceUsdNumber": 0.09
        }
      },
      "description": "[BATCH+PROOF] MCP server graveyard - servers that vanished from the census. THRESHOLD stated plainly: listed on FIRST confirmed absence (confirm_absences=1), not multi-day confirmation; only two snapshot days exist. record_hash is null on these rows (imported from a surviving registry, the original collector never produced hashes). Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. $0.09 per call.",
      "outputSchema": {
        "input": {
          "type": "http",
          "method": "GET",
          "required": [],
          "properties": {
            "verifiable": {
              "type": "string",
              "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="
            }
          },
          "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 recompute and verify fully offline; omitted by default to keep the payload small - for online verification use free GET /gauge/verify?hash="
          },
          "discoverable": true
        },
        "output": {
          "type": "object",
          "properties": {
            "count": {
              "type": "integer"
            },
            "deaths": {
              "type": "array"
            },
            "provenance": {
              "type": "object",
              "description": "Freshness and lineage: freshness / freshness_basis / age_hours_now / data_lineage, with the oldest row representing the whole batch"
            },
            "observed_at": {
              "type": [
                "string",
                "null"
              ],
              "description": "Observation time of the OLDEST row in this batch (ISO) - the most conservative basis"
            },
            "record_hash_verifiable": {
              "type": "object"
            }
          }
        }
      },
      "maxAmountRequired": "90000",
      "maxTimeoutSeconds": 300
    }
  ],
  "x402Version": 1
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.09USDC≈ $0.09 USD

on Base · exact scheme

Pay 0.09 USDC on Base to 0x2d16…4c6c3. The signed payment is good for 5 minutes.

Paid to: 0x2d16…4c6c3
USD Coin contract: 0x8335…02913
Payment window: 5 minutes
As published: 90000 smallest units

90000units

on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: 8qEn3Y…QAY3n
Token contract: EPjFWd…TDt1v
Payment window: 5 minutes

The catalog’s raw entry

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x2d16a243ba9facc6ac85519d5efad2149dc4c6c3",
    "amount": "90000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F"
    },
    "payTo": "8qEn3Y3GPXdQ28LHshPa4UYeD8V38Lq9b4jCRirQAY3n",
    "amount": "90000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "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"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "entity": "(unlocked on payment)",
          "current": {
            "name": "x711",
            "status": "active",
            "missing_streak": 0
          },
          "lifecycle": {
            "basis": "Imported from the surviving registry (2026-07-25); state is derived from status + missing_streak, 7 consecutive disap...",
            "state": "operating",
            "last_seen": "2026-07-08",
            "first_seen": "2026-07-07",
            "lifespan_days": 1,
            "missing_streak": 0
          },
          "signal_id": "mcp.server-census",
          "source_ref": "https://github.com/modelcontextprotocol",
          "entity_name": "(unlocked on payment)",
          "observed_at": "2026-07-08T00:00:00.000Z",
          "record_hash": "sha256:051650e9a2042e4530442ff7b73a6d8b4d9e943c109994f61a5c92a760e3068f",
          "source_tier": "T2-observable",
          "snapshot_date": "2026-07-08",
          "data_age_hours": 422,
          "hash_core_version": 4
        }
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "const": "http"
            },
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "properties": {
                "verifiable": {
                  "type": "string",
                  "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="
                }
              },
              "additionalProperties": false
            }
          }
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "const": "json"
            },
            "example": {}
          }
        }
      }
    },
    "priceUsd": "$0.09",
    "discoverable": true,
    "routeTemplate": "/mcp/graveyard",
    "priceUsdNumber": 0.09,
    "outputSchemaRef": "/manifest"
  }
}

Provenance

Seen in the source catalog: 2026-09-07 08:52Z
Last indexed by Roundhouse: 2026-09-24 15:30Z
Last enriched (probe, favicon, geo): 2026-09-23 22:15Z
x402 version: 2
Max timeout: 300s
Liveness probe: HTTP 402

Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md

Show the prompt

Using Roundhouse, look up the x402 service Truth Bear and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Truth%20Bear'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://api.truthbear.co/mcp/graveyard, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402,
or use an organization key from https://roundhouseai.io/dashboard/team.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.