Truth Bear

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/tariff-region?entity=<value>",
    "preview": "/gauge/preview",
    "missing_params": [
      "entity"
    ],
    "example_request": "/gauge/tariff-region?entity=sec301-china-list1&format=thin"
  },
  "error": "Missing required query parameter(s): entity. A request you can run right now: GET /gauge/tariff-region?entity=sec301-china-list1&format=thin\nX-PAYMENT header is required. This endpoint costs $0.25 USDC, above the x402 client default maxValue of $0.10 — raise maxValue to at least 250000 atomic units, or your own client rejects this payment locally and no request ever reaches us. Do not want to raise it? A cheaper alternative you can run right now: GET /gauge?signal_id=hydrology.river-level&entity=07010000&format=thin ($0.01 USDC) - the same official signal plus its offline-recomputable proof - no three-leg chain, one signal only.",
  "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": "250000",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://api.truthbear.co/gauge/tariff-region",
      "extensions": {
        "bazaar": {
          "info": {
            "input": {
              "type": "http",
              "method": "GET",
              "queryParams": {
                "entity": "required - monitored object id, paired with signal_id; free list at GET /gauge/catalog?signal_id=<signal_id> -> signals["
              }
            },
            "output": {
              "type": "json",
              "example": {
                "legs": {
                  "lifecycle": {
                    "band": "operating",
                    "source_ref": "https://ustr.gov/issue-areas/enforcement/section-301-investigations",
                    "record_hash": "sha256:296dd5745d41a5f0006c906f2b6ce819eed2f6fb0b84e0300062992acd5025c7"
                  },
                  "review_pipeline": {
                    "band": "none",
                    "source_ref": "https://ustr.gov/issue-areas/enforcement/section-301-investigations",
                    "record_hash": "sha256:edd4891010629d1054ed529adc22aa62e336257664754f350aba8226e7517f1f"
                  },
                  "tradeflow_cascade": {
                    "band": "unconfirmed",
                    "source_ref": "https://ustr.gov/issue-areas/enforcement/section-301-investigations",
                    "record_hash": "sha256:ce30a7aae7c60acdc8b62e0744a43becd61dde14b70cfe53c871cb4aa0b4ca82"
                  }
                },
                "name": "Section 301 China List 1",
                "grade": "screening-level, not decision-grade",
                "scope": {
                  "full": "https://api.truthbear.co/scope/v1",
                  "verifiability": "unknown",
                  "monitoring_not_forecast": true,
                  "intelligence_not_command": true
                },
                "entity": "sec301-china-list1",
                "nature": "This API supplies data organisation and trend description only. It is not a recommendation to act; the decision is yours. Purely descriptive - no judgement, no prediction. Official source plus record_hash; verify with the free /gauge/verify.",
                "provenance": {
                  "freshness": "recent",
                  "age_hours_now": 151,
                  "freshness_basis": "cadence=default; fresh<=24h; recent<=192h; dead_source>1440h; age_basis=request-time(now minus observed_at)"
                }
              }
            }
          },
          "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": [
                          "sec301-china-list1",
                          "sec301-china-list3",
                          "sec301-list4a",
                          "sec301-ev-modifications",
                          "sec232-steel",
                          "sec232-aluminum"
                        ],
                        "description": "required - monitored object id, paired with signal_id; free list at GET /gauge/catalog?signal_id=<signal_id> -> signals[0].entities[]",
                        "x-accepted-values": {
                          "all": "https://api.truthbear.co/schemas/gauge-tariff-region.input.json",
                          "shown": 6,
                          "total": 22
                        }
                      }
                    },
                    "additionalProperties": false
                  }
                }
              },
              "output": {
                "type": "object",
                "required": [
                  "type"
                ],
                "properties": {
                  "type": {
                    "const": "json"
                  },
                  "example": {}
                }
              }
            }
          },
          "priceUsd": "$0.25",
          "discoverable": true,
          "outputSchema": {
            "type": "object",
            "required": [
              "nature",
              "legs"
            ],
            "properties": {
              "legs": {
                "type": "object",
                "description": "CORE DELIVERY: per-leg readings, keyed by leg name (e.g. drought/heat/crop-vhi); each value carries signal_id/current/observed_at/data_age_hours/record_hash"
              },
              "name": {
                "type": [
                  "string",
                  "null"
                ],
                "description": "Human-readable name of the object"
              },
              "note": {
                "type": "string",
                "description": "Conditional - endpoint-specific honest disclosure (limits, granularity, disclaimer); some endpoints omit it"
              },
              "grade": {
                "type": [
                  "string",
                  "null"
                ],
                "description": "Honest data-grade disclosure (e.g. \"screening-level, not decision-grade\")"
              },
              "scope": {
                "type": [
                  "string",
                  "null"
                ],
                "description": "Honest statement of scope and limits: monitoring is not forecasting, intelligence is not instruction, and the boundary of what is verifiable"
              },
              "entity": {
                "type": "string",
                "description": "The object key of this bundle - the ?entity= you passed in"
              },
              "nature": {
                "type": "string",
                "description": "Neutrality statement: GAUGE supplies observations and trend description only - no judgement, no prediction, no recommendation"
              },
              "_citation": {
                "type": [
                  "object",
                  "null"
                ],
                "description": "Offline-verifiable citation: {statement_type, not_advice:bool, claim, fact, source, record_hash, signature(Ed25519), key_id, issuer_DID(did:key), verify_url} - the trust root for zero-trust self-verification"
              },
              "provenance": {
                "type": [
                  "object",
                  "null"
                ],
                "description": "Data lineage: {served_from, data_as_of, oldest_leg_as_of, data_age_hours (frozen age, reference only), age_hours_now (age computed at request time - the real basis for freshness), freshness(fresh|recent|stale), freshness_basis (the cadence and threshold used for this row, as a string), dead_source (optional: upstream frozen or discontinued), data_lineage:[{signal,traceable_to,uncertainty,record_hash,...}], validation_status}. Freshness is cadence-aware, so monthly/quarterly/annual official lines are not misjudged against a 24h rule; the same basis is used by free /gauge/coverage. Buyers can trace back to the official source"
              },
              "data_timespans": {
                "type": "array",
                "items": {
                  "type": "object",
                  "additionalProperties": true
                },
                "description": "Per-leg observation time and hours elapsed since"
              },
              "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"
              },
              "cross_line_narrative": {
                "type": "string",
                "description": "Cross-line comparison narrative (purely descriptive; no judgement, no prediction)"
              }
            },
            "additionalProperties": true,
            "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/tariff-region",
          "priceUsdNumber": 0.25
        }
      },
      "description": "[3-LEG] Tariff and customs measure chain, one trade measure (?entity=sec301-china-list1): leading review pipeline stage -> current current legal force -> realized lifecycle from imposed to expired or rescinded (confirmation gate). A chain, not one reading: confidence = how many legs are lit, in order. Sources: USTR, Federal Register, USITC. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. $0.25 per call.",
      "outputSchema": {
        "input": {
          "type": "http",
          "method": "GET",
          "example": {
            "entity": "sec301-china-list1",
            "format": "thin"
          },
          "required": [
            "entity"
          ],
          "properties": {
            "entity": {
              "type": "string",
              "examples": [
                "sec301-china-list1",
                "sec301-china-list3",
                "sec301-list4a",
                "sec301-ev-modifications",
                "sec232-steel",
                "sec232-aluminum"
              ],
              "description": "required - monitored object id, paired with signal_id; free list at GET /gauge/catalog?signal_id=<signal_id> -> signals[0].entities[]",
              "x-accepted-values": {
                "all": "https://api.truthbear.co/schemas/gauge-tariff-region.input.json",
                "shown": 6,
                "total": 22
              }
            }
          },
          "queryParams": {
            "entity": "required - monitored object id, paired with signal_id; free list at GET /gauge/catalog?signal_id=<signal_id> -> signals[0].entities[]"
          },
          "discoverable": true,
          "exampleRequest": "/gauge/tariff-region?entity=sec301-china-list1&format=thin"
        },
        "output": {
          "type": "object",
          "required": [
            "nature",
            "legs"
          ],
          "properties": {
            "legs": {
              "type": "object",
              "description": "CORE DELIVERY: per-leg readings, keyed by leg name (e.g. drought/heat/crop-vhi); each value carries signal_id/current/observed_at/data_age_hours/record_hash"
            },
            "name": {
              "type": [
                "string",
                "null"
              ],
              "description": "Human-readable name of the object"
            },
            "note": {
              "type": "string",
              "description": "Conditional - endpoint-specific honest disclosure (limits, granularity, disclaimer); some endpoints omit it"
            },
            "grade": {
              "type": [
                "string",
                "null"
              ],
              "description": "Honest data-grade disclosure (e.g. \"screening-level, not decision-grade\")"
            },
            "scope": {
              "type": [
                "string",
                "null"
              ],
              "description": "Honest statement of scope and limits: monitoring is not forecasting, intelligence is not instruction, and the boundary of what is verifiable"
            },
            "entity": {
              "type": "string",
              "description": "The object key of this bundle - the ?entity= you passed in"
            },
            "nature": {
              "type": "string",
              "description": "Neutrality statement: GAUGE supplies observations and trend description only - no judgement, no prediction, no recommendation"
            },
            "_citation": {
              "type": [
                "object",
                "null"
              ],
              "description": "Offline-verifiable citation: {statement_type, not_advice:bool, claim, fact, source, record_hash, signature(Ed25519), key_id, issuer_DID(did:key), verify_url} - the trust root for zero-trust self-verification"
            },
            "provenance": {
              "type": [
                "object",
                "null"
              ],
              "description": "Data lineage: {served_from, data_as_of, oldest_leg_as_of, data_age_hours (frozen age, reference only), age_hours_now (age computed at request time - the real basis for freshness), freshness(fresh|recent|stale), freshness_basis (the cadence and threshold used for this row, as a string), dead_source (optional: upstream frozen or discontinued), data_lineage:[{signal,traceable_to,uncertainty,record_hash,...}], validation_status}. Freshness is cadence-aware, so monthly/quarterly/annual official lines are not misjudged against a 24h rule; the same basis is used by free /gauge/coverage. Buyers can trace back to the official source"
            },
            "data_timespans": {
              "type": "array",
              "items": {
                "type": "object",
                "additionalProperties": true
              },
              "description": "Per-leg observation time and hours elapsed since"
            },
            "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"
            },
            "cross_line_narrative": {
              "type": "string",
              "description": "Cross-line comparison narrative (purely descriptive; no judgement, no prediction)"
            }
          },
          "additionalProperties": true,
          "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": "250000",
      "maxTimeoutSeconds": 300
    }
  ],
  "client_hint": {
    "action": "This endpoint costs $0.25 USDC, above the x402 client default maxValue of $0.10. Raise your client maxValue to at least required_atomic; otherwise the payment is rejected locally inside your own client and never reaches this server, so you will see no error from us.",
    "reason": "price_above_default_client_max_value",
    "example": "wrapFetchWithPayment(fetch, account, BigInt(250000))  // atomic units, USDC 6dp",
    "required_usdc": "0.25",
    "required_atomic": "250000",
    "within_your_budget": [
      {
        "try": "/gauge?signal_id=hydrology.river-level&entity=07010000&format=thin",
        "gets": "the same official signal plus its offline-recomputable proof - no three-leg chain, one signal only",
        "path": "/gauge",
        "usdc": "0.01"
      }
    ],
    "default_client_max_atomic": "100000"
  },
  "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.

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x2d16a243ba9facc6ac85519d5efad2149dc4c6c3",
    "amount": "250000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F"
    },
    "payTo": "8qEn3Y3GPXdQ28LHshPa4UYeD8V38Lq9b4jCRirQAY3n",
    "amount": "250000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "example": {
          "entity": "sec301-china-list1",
          "format": "thin"
        },
        "queryParams": {
          "entity": "required - monitored object id, paired with signal_id; free list at GET /gauge/catalog?signal_id=<signal_id> -> signals["
        },
        "exampleRequest": "/gauge/tariff-region?entity=sec301-china-list1&format=thin"
      },
      "output": {
        "type": "json",
        "example": {
          "legs": {
            "lifecycle": {
              "band": "operating",
              "source_ref": "https://ustr.gov/issue-areas/enforcement/section-301-investigations",
              "record_hash": "sha256:296dd5745d41a5f0006c906f2b6ce819eed2f6fb0b84e0300062992acd5025c7"
            },
            "review_pipeline": {
              "band": "none",
              "source_ref": "https://ustr.gov/issue-areas/enforcement/section-301-investigations",
              "record_hash": "sha256:edd4891010629d1054ed529adc22aa62e336257664754f350aba8226e7517f1f"
            },
            "tradeflow_cascade": {
              "band": "unconfirmed",
              "source_ref": "https://ustr.gov/issue-areas/enforcement/section-301-investigations",
              "record_hash": "sha256:ce30a7aae7c60acdc8b62e0744a43becd61dde14b70cfe53c871cb4aa0b4ca82"
            }
          },
          "name": "Section 301 China List 1",
          "grade": "screening-level, not decision-grade",
          "scope": {
            "full": "https://api.truthbear.co/scope/v1",
            "verifiability": "unknown",
            "monitoring_not_forecast": true,
            "intelligence_not_command": true
          },
          "entity": "sec301-china-list1",
          "nature": "This API supplies data organisation and trend description only. It is not a recommendation to act; the decision is yours. Purely descriptive - no judgement, no prediction. Official source plus record_hash; verify with the free /gauge/verify.",
          "provenance": {
            "freshness": "recent",
            "age_hours_now": 151,
            "freshness_basis": "cadence=default; fresh<=24h; recent<=192h; dead_source>1440h; age_basis=request-time(now minus observed_at)"
          }
        }
      }
    },
    "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": [
                    "sec301-china-list1",
                    "sec301-china-list3",
                    "sec301-list4a",
                    "sec301-ev-modifications",
                    "sec232-steel",
                    "sec232-aluminum"
                  ],
                  "description": "required - monitored object id, paired with signal_id; free list at GET /gauge/catalog?signal_id=<signal_id> -> signals[0].entities[]",
                  "x-accepted-values": {
                    "all": "https://api.truthbear.co/schemas/gauge-tariff-region.input.json",
                    "shown": 6,
                    "total": 22
                  }
                }
              },
              "additionalProperties": false
            }
          }
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "const": "json"
            },
            "example": {}
          }
        }
      }
    },
    "priceUsd": "$0.25",
    "discoverable": true,
    "routeTemplate": "/gauge/tariff-region",
    "priceUsdNumber": 0.25,
    "outputSchemaRef": "/manifest"
  }
}

Provenance

Seen in the source catalog

2026-09-07 08:54Z

Last indexed by Roundhouse

2026-09-24 19:30Z

Last enriched (probe, favicon, geo)

2026-09-24 11:15Z

x402 version

2

Max timeout

300s

Liveness probe

HTTP 0