Truth Bear

Official-source facts for AI agents, each with a record_hash you can recompute offline - you never have to trust this server. 64 paid endpoints from $0.005, x402 (USDC on Base or Solana), no API key and no signup. Free coverage check before you pay; no data returns 422 no_charge and you are not billed. Descriptive only: no judgement, no prediction. Hydrology, air quality, precipitation, shipping chokepoints, filings, stablecoin and MCP-ecosystem lifecycles.

Dataofflineeip155:8453Exactvia cdp
GaugeLifecycleNo-data-no-chargeOfficial-sourceRecord-hash
Calls · 30d
10↓ 15%
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.
$0.0050
Listed price
As published in the catalog. Always read the live 402 before paying.
10
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
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.

{
  "hint": {
    "miss": "missing_parameter",
    "usage": "/gauge/lifecycle?entity=<value>",
    "preview": "/gauge/catalog",
    "missing_params": [
      "entity"
    ],
    "example_request": "/gauge/lifecycle?entity=coreweave"
  },
  "error": "Missing required query parameter(s): entity. A request you can run right now: GET /gauge/lifecycle?entity=coreweave\nX-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": "5000",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://api.truthbear.co/gauge/lifecycle",
      "extensions": {
        "bazaar": {
          "info": {
            "input": {
              "type": "http",
              "method": "GET",
              "queryParams": {
                "entity": "required - the id to look up (e.g. coreweave, terrausd-ust, jasper-ai, helium). Full list: free GET /gauge/catalog?all=1",
                "industry": "optional - narrow to one line when an id is tracked by more than one (e.g. ai-compute, stablecoin). Omit and you get eve"
              }
            },
            "output": {
              "type": "json"
            }
          },
          "schema": {
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "properties": {
              "input": {
                "type": "object",
                "required": [
                  "type",
                  "method",
                  "queryParams"
                ],
                "properties": {
                  "type": {
                    "const": "http"
                  },
                  "method": {
                    "enum": [
                      "GET"
                    ],
                    "type": "string"
                  },
                  "queryParams": {
                    "type": "object",
                    "required": [
                      "entity"
                    ],
                    "properties": {
                      "entity": {
                        "type": "string",
                        "examples": [
                          "coreweave"
                        ],
                        "description": "required - the id to look up (e.g. coreweave, terrausd-ust, jasper-ai, helium). Full list: free GET /gauge/catalog?all=1 -> signals[] where signal_id ends in .lifecycle, then ?signal_id=<id> for its entities[]"
                      },
                      "industry": {
                        "type": "string",
                        "description": "optional - narrow to one line when an id is tracked by more than one (e.g. ai-compute, stablecoin). Omit and you get every matching line"
                      }
                    },
                    "additionalProperties": false
                  }
                }
              },
              "output": {
                "type": "object",
                "required": [
                  "type"
                ],
                "properties": {
                  "type": {
                    "const": "json"
                  }
                }
              }
            }
          },
          "priceUsd": "$0.005",
          "discoverable": true,
          "outputSchema": {
            "type": "object",
            "required": [
              "entity",
              "matched_lines",
              "matches",
              "record_hash_verifiable"
            ],
            "properties": {
              "entity": {
                "type": "string",
                "description": "The id you asked about, echoed back."
              },
              "nature": {
                "type": "string",
                "description": "Descriptive-only statement: state as recorded by the source, never adjudication or forecast."
              },
              "matches": {
                "type": "array",
                "items": {
                  "type": "object",
                  "properties": {
                    "entity": {
                      "type": "string"
                    },
                    "status": {
                      "type": [
                        "string",
                        "null"
                      ],
                      "description": "The band on the official ruler, e.g. operating / at_risk / ended. null when the line publishes no band."
                    },
                    "current": {
                      "description": "The stored reading itself; shape varies by line (part of the hash core)."
                    },
                    "sources": {
                      "description": "Per-source provenance as stored (part of the v3 hash core)."
                    },
                    "industry": {
                      "type": "string",
                      "description": "The signal_id without the .lifecycle suffix."
                    },
                    "lifecycle": {
                      "type": [
                        "object",
                        "null"
                      ],
                      "description": "birth_at / end_at / death_type / lifespan_days as recorded (part of the hash core)."
                    },
                    "signal_id": {
                      "type": "string",
                      "description": "e.g. stablecoin.lifecycle"
                    },
                    "source_ref": {
                      "type": [
                        "string",
                        "null"
                      ],
                      "description": "Official source reference (part of the hash core)."
                    },
                    "entity_name": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "observed_at": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "record_hash": {
                      "type": "string",
                      "description": "Canonical sha256; every hash-core field above is delivered, so you can recompute it offline."
                    },
                    "source_tier": {
                      "type": [
                        "string",
                        "null"
                      ],
                      "description": "Part of the v3 hash core."
                    },
                    "snapshot_date": {
                      "type": "string",
                      "description": "YYYY-MM-DD of the stored snapshot (part of the hash core)."
                    },
                    "data_age_hours": {
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "standard_ruler": {
                      "type": [
                        "object",
                        "null"
                      ],
                      "description": "The official ruler as stored, including the status band (part of the v3 hash core)."
                    },
                    "hash_core_version": {
                      "type": [
                        "integer",
                        "string",
                        "null"
                      ]
                    },
                    "source_agreement_cv": {
                      "type": [
                        "number",
                        "null"
                      ]
                    }
                  }
                },
                "description": "One element per lifecycle line that tracks this id."
              },
              "matched_lines": {
                "type": "integer",
                "description": "How many lifecycle lines track this id. Usually 1; a handful of ids are tracked by 2 lines and then you get both - nothing is picked for you."
              },
              "decision_points": {
                "type": [
                  "object",
                  "null"
                ],
                "description": "{count, points:[{tag,current,swappable,how}], note} - decision points you can re-run with a swapped tag (one swapped tag = one call); leave it alone and the original context is the default, at no extra charge"
              },
              "record_hash_verifiable": {
                "type": "object",
                "description": "Computed per delivery, not a boast: mode (offline/partial/none), how many of the returned records were actually recomputed server-side, and out of how many."
              }
            },
            "conditionalProperties": {
              "last_fact": {
                "type": [
                  "object",
                  "null"
                ],
                "description": "Most recent qualifying fact for this line and entity, attached centrally (may be absent when the line has no qualifying fact yet)"
              },
              "decision_points": {
                "type": [
                  "object",
                  "null"
                ],
                "description": "Swappable decision points for this entity, attached centrally: {count, points:[{tag,current,swappable,how}], note}. Present only when the entity has at least one swappable tag in the index, so bundles for entities without one omit it"
              },
              "leg_availability": {
                "type": [
                  "object",
                  "null"
                ],
                "description": "Per-leg degradation disclosure: which legs are present, which are degraded and why. Present only when at least one leg is degraded"
              },
              "record_hash_verifiable": {
                "type": [
                  "object",
                  "null"
                ],
                "description": "Whether this response can recompute its own record_hash offline. Present only when the payload carries a top-level record_hash; may be absent on list-shaped deliveries where verifiability is stated per row instead"
              }
            }
          },
          "routeTemplate": "/gauge/lifecycle",
          "priceUsdNumber": 0.005
        }
      },
      "description": "One id in, its official lifecycle state out - no need to know which line tracks it first. Covers 19 lifecycle lines (stablecoins, AI tools and datasets, neoclouds, DePIN, RWA, carbon projects, ESG funds, tariff measures and more): status band, birth/end dates, death type, lifespan, official source_ref. If two lines track the same id you get BOTH - nothing is picked for you. Unknown id -> 422 no_charge, not billed. Every record carries an offline-recomputable record_hash. $0.0050 per call.",
      "outputSchema": {
        "input": {
          "type": "http",
          "method": "GET",
          "example": {
            "entity": "coreweave"
          },
          "required": [
            "entity"
          ],
          "properties": {
            "entity": {
              "type": "string",
              "examples": [
                "coreweave"
              ],
              "description": "required - the id to look up (e.g. coreweave, terrausd-ust, jasper-ai, helium). Full list: free GET /gauge/catalog?all=1 -> signals[] where signal_id ends in .lifecycle, then ?signal_id=<id> for its entities[]"
            },
            "industry": {
              "type": "string",
              "description": "optional - narrow to one line when an id is tracked by more than one (e.g. ai-compute, stablecoin). Omit and you get every matching line"
            }
          },
          "queryParams": {
            "entity": "required - the id to look up (e.g. coreweave, terrausd-ust, jasper-ai, helium). Full list: free GET /gauge/catalog?all=1 -> signals[] where signal_id ends in .lifecycle, then ?signal_id=<id> for its entities[]",
            "industry": "optional - narrow to one line when an id is tracked by more than one (e.g. ai-compute, stablecoin). Omit and you get every matching line"
          },
          "discoverable": true,
          "exampleRequest": "/gauge/lifecycle?entity=coreweave"
        },
        "output": {
          "type": "object",
          "required": [
            "entity",
            "matched_lines",
            "matches",
            "record_hash_verifiable"
          ],
          "properties": {
            "entity": {
              "type": "string",
              "description": "The id you asked about, echoed back."
            },
            "nature": {
              "type": "string",
              "description": "Descriptive-only statement: state as recorded by the source, never adjudication or forecast."
            },
            "matches": {
              "type": "array",
              "items": {
                "type": "object",
                "properties": {
                  "entity": {
                    "type": "string"
                  },
                  "status": {
                    "type": [
                      "string",
                      "null"
                    ],
                    "description": "The band on the official ruler, e.g. operating / at_risk / ended. null when the line publishes no band."
                  },
                  "current": {
                    "description": "The stored reading itself; shape varies by line (part of the hash core)."
                  },
                  "sources": {
                    "description": "Per-source provenance as stored (part of the v3 hash core)."
                  },
                  "industry": {
                    "type": "string",
                    "description": "The signal_id without the .lifecycle suffix."
                  },
                  "lifecycle": {
                    "type": [
                      "object",
                      "null"
                    ],
                    "description": "birth_at / end_at / death_type / lifespan_days as recorded (part of the hash core)."
                  },
                  "signal_id": {
                    "type": "string",
                    "description": "e.g. stablecoin.lifecycle"
                  },
                  "source_ref": {
                    "type": [
                      "string",
                      "null"
                    ],
                    "description": "Official source reference (part of the hash core)."
                  },
                  "entity_name": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "observed_at": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "record_hash": {
                    "type": "string",
                    "description": "Canonical sha256; every hash-core field above is delivered, so you can recompute it offline."
                  },
                  "source_tier": {
                    "type": [
                      "string",
                      "null"
                    ],
                    "description": "Part of the v3 hash core."
                  },
                  "snapshot_date": {
                    "type": "string",
                    "description": "YYYY-MM-DD of the stored snapshot (part of the hash core)."
                  },
                  "data_age_hours": {
                    "type": [
                      "number",
                      "null"
                    ]
                  },
                  "standard_ruler": {
                    "type": [
                      "object",
                      "null"
                    ],
                    "description": "The official ruler as stored, including the status band (part of the v3 hash core)."
                  },
                  "hash_core_version": {
                    "type": [
                      "integer",
                      "string",
                      "null"
                    ]
                  },
                  "source_agreement_cv": {
                    "type": [
                      "number",
                      "null"
                    ]
                  }
                }
              },
              "description": "One element per lifecycle line that tracks this id."
            },
            "matched_lines": {
              "type": "integer",
              "description": "How many lifecycle lines track this id. Usually 1; a handful of ids are tracked by 2 lines and then you get both - nothing is picked for you."
            },
            "decision_points": {
              "type": [
                "object",
                "null"
              ],
              "description": "{count, points:[{tag,current,swappable,how}], note} - decision points you can re-run with a swapped tag (one swapped tag = one call); leave it alone and the original context is the default, at no extra charge"
            },
            "record_hash_verifiable": {
              "type": "object",
              "description": "Computed per delivery, not a boast: mode (offline/partial/none), how many of the returned records were actually recomputed server-side, and out of how many."
            }
          },
          "conditionalProperties": {
            "last_fact": {
              "type": [
                "object",
                "null"
              ],
              "description": "Most recent qualifying fact for this line and entity, attached centrally (may be absent when the line has no qualifying fact yet)"
            },
            "decision_points": {
              "type": [
                "object",
                "null"
              ],
              "description": "Swappable decision points for this entity, attached centrally: {count, points:[{tag,current,swappable,how}], note}. Present only when the entity has at least one swappable tag in the index, so bundles for entities without one omit it"
            },
            "leg_availability": {
              "type": [
                "object",
                "null"
              ],
              "description": "Per-leg degradation disclosure: which legs are present, which are degraded and why. Present only when at least one leg is degraded"
            },
            "record_hash_verifiable": {
              "type": [
                "object",
                "null"
              ],
              "description": "Whether this response can recompute its own record_hash offline. Present only when the payload carries a top-level record_hash; may be absent on list-shaped deliveries where verifiability is stated per row instead"
            }
          }
        }
      },
      "maxAmountRequired": "5000",
      "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.

0.005USDC≈ $0.005 USD
on Base · exact scheme

Pay 0.005 USDC on Base to 0x2d16…4c6c3. The signed payment is good for 5 minutes.

USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
5000 smallest units
5000units
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.

Token contract
EPjFWd…TDt1v
Payment window
5 minutes
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x2d16a243ba9facc6ac85519d5efad2149dc4c6c3",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F"
    },
    "payTo": "8qEn3Y3GPXdQ28LHshPa4UYeD8V38Lq9b4jCRirQAY3n",
    "amount": "5000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "example": {
          "entity": "coreweave"
        },
        "queryParams": {
          "entity": "required - the id to look up (e.g. coreweave, terrausd-ust, jasper-ai, helium). Full list: free GET /gauge/catalog?all=1",
          "industry": "optional - narrow to one line when an id is tracked by more than one (e.g. ai-compute, stablecoin). Omit and you get eve"
        },
        "exampleRequest": "/gauge/lifecycle?entity=coreweave"
      },
      "output": {
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method",
            "queryParams"
          ],
          "properties": {
            "type": {
              "const": "http"
            },
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "required": [
                "entity"
              ],
              "properties": {
                "entity": {
                  "type": "string",
                  "examples": [
                    "coreweave"
                  ],
                  "description": "required - the id to look up (e.g. coreweave, terrausd-ust, jasper-ai, helium). Full list: free GET /gauge/catalog?all=1 -> signals[] where signal_id ends in .lifecycle, then ?signal_id=<id> for its entities[]"
                },
                "industry": {
                  "type": "string",
                  "description": "optional - narrow to one line when an id is tracked by more than one (e.g. ai-compute, stablecoin). Omit and you get every matching line"
                }
              },
              "additionalProperties": false
            }
          }
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "const": "json"
            }
          }
        }
      }
    },
    "priceUsd": "$0.005",
    "discoverable": true,
    "routeTemplate": "/gauge/lifecycle",
    "priceUsdNumber": 0.005,
    "outputSchemaRef": "/manifest"
  }
}

Provenance

Seen in the source catalog
2026-09-07 08:52Z
Last indexed by Roundhouse
2026-09-24 23:30Z
Last enriched (probe, favicon, geo)
2026-09-24 11:16Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 0
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/gauge/lifecycle, 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.