api.sourcestrand.com

Live 402 challenge

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

{
  "x402": {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "price": "$0.03",
          "version": "2"
        },
        "payTo": "0xCc28F533F7ED90B8B98b5E9614B96138e790267F",
        "amount": "30000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "https://api.sourcestrand.com/v1/paid/tw-data-packs/regulated-supplier-compliance",
      "tags": [
        "taiwan-data",
        "regulated-supplier",
        "food-business",
        "medical-device-vendor",
        "public-nonconformity",
        "record-backed-pack",
        "official-source-records",
        "english-field-map",
        "buyer-pack",
        "paid-data-product"
      ],
      "mimeType": "application/json",
      "description": "Taiwan regulated supplier compliance pack. Food and medical-device vendor streams plus public nonconformity records for AI-agent supplier preflight with lineage and limitations.",
      "serviceName": "Taiwan Regulated Supplier Compliance Pack"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {}
          },
          "output": {
            "type": "json",
            "example": {
              "product": "tw_regulated_supplier_compliance_pack",
              "streams": [],
              "limitations": [],
              "data_lineage": [],
              "agent_handoff": {},
              "package_scope": {
                "tier": "paid_pack"
              },
              "record_backed_pack": {}
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET",
                    "HEAD",
                    "DELETE"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "type": "object",
                  "properties": {}
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        },
        "routeTemplate": "/v1/paid/tw-data-packs/regulated-supplier-compliance"
      }
    },
    "x402Version": 2
  },
  "error": "PAYMENT_REQUIRED",
  "price": "$0.03",
  "reason": "missing_payment_header",
  "message": "Payment is required.",
  "product_metadata": {
    "price": "$0.03",
    "title": "Taiwan Regulated Supplier Compliance Pack",
    "not_for": [
      "Legal clearance, regulatory certification, vendor acceptance decisioning, or product compliance advice.",
      "A guarantee about the absence of nonconformity, labor, or environmental public events.",
      "Credit scoring, procurement decisioning, investment advice, or customs advice."
    ],
    "pack_type": "record_backed_buyer_pack",
    "product_id": "tw_regulated_supplier_compliance_pack",
    "preview_url": "https://api.sourcestrand.com/v1/preview/tw-data-packs/regulated-supplier-compliance",
    "deeper_packs": [
      {
        "pack_id": "tw_company_brief",
        "use_when": "The buyer has a concrete supplier and needs company-level identity context before regulated-sector review.",
        "endpoint_template": "https://api.sourcestrand.com/v1/paid/tw-company/brief?business_id={business_id}"
      },
      {
        "pack_id": "tw_trade_import_export_pack",
        "use_when": "The buyer wants importer/exporter and HS-country trade context around a regulated supplier topic.",
        "endpoint_template": "https://api.sourcestrand.com/v1/paid/tw-data-packs/trade-import-export"
      },
      {
        "pack_id": "tw_compliance_risk_pack",
        "use_when": "The buyer wants broader public-risk streams beyond food, medical-device, and product nonconformity.",
        "endpoint_template": "https://api.sourcestrand.com/v1/paid/tw-data-packs/compliance-risk"
      },
      {
        "pack_id": "tw_procurement_supplier_lead_pack",
        "use_when": "The buyer needs public-sector supplier activity around a regulated product or service category.",
        "endpoint_template": "https://api.sourcestrand.com/v1/paid/tw-procurement/supplier-lead-pack?q={keyword}"
      }
    ],
    "best_fit_buyers": [
      "Importers or sourcing teams screening Taiwan food or medical-device supplier records before manual review.",
      "AI assistants assembling regulated supplier preflight packets for human compliance teams.",
      "B2B analysts who need vendor registry context plus public nonconformity event streams in one handoff."
    ],
    "paid_response_delta": [
      "Full regulated supplier pack covering food business, medical-device vendor, and public nonconformity stream contracts.",
      "Record shape examples, key fields, English payload fields, source refresh cadence, and storage policy for regulated supplier workflows.",
      "Review-boundary language for supplier preflight without claiming clearance, certification, or absence of risk.",
      "Agent handoff notes for preserving source attribution, source-language values, limitations, and next company/procurement calls."
    ]
  },
  "payment_instructions": {
    "asset": "USD Coin",
    "price": "$0.03",
    "reason": "missing_payment_header",
    "network": "eip155:8453",
    "protocol": "x402",
    "diagnosis": {
      "issue_type": "needs_x402_client_retry",
      "likely_cause": "The request did not include an x-payment header. This is expected for the first x402 handshake, and also happens when a human clicks a paid endpoint in a normal browser or a client uses plain fetch without x402 retry support.",
      "operator_note": "Treat this as buyer friction or an integration handoff gap unless it repeats after the buyer says they used an x402-capable client."
    },
    "client_hint": "Use an x402-compatible client such as @x402/fetch, or this repo's npm run x402:paid-gateway smoke client.",
    "pay_now_url": "https://api.sourcestrand.com/checkout?resource_url=https%3A%2F%2Fapi.sourcestrand.com%2Fv1%2Fpaid%2Ftw-data-packs%2Fregulated-supplier-compliance",
    "safety_note": "Do not send wallet private keys to this API. The buyer client signs locally and sends the x-payment header.",
    "approval_url": "https://api.sourcestrand.com/checkout?resource_url=https%3A%2F%2Fapi.sourcestrand.com%2Fv1%2Fpaid%2Ftw-data-packs%2Fregulated-supplier-compliance",
    "browser_note": "Open pay_now_url in a wallet-enabled browser, then choose Pay and Download. The Worker never receives private keys; signing happens in the buyer wallet.",
    "resource_url": "https://api.sourcestrand.com/v1/paid/tw-data-packs/regulated-supplier-compliance",
    "agent_handoff": {
      "approval_url": "https://api.sourcestrand.com/checkout?resource_url=https%3A%2F%2Fapi.sourcestrand.com%2Fv1%2Fpaid%2Ftw-data-packs%2Fregulated-supplier-compliance",
      "retry_header": "x-payment",
      "payment_intent_url": "https://api.sourcestrand.com/v1/payment/intent?resource_url=https%3A%2F%2Fapi.sourcestrand.com%2Fv1%2Fpaid%2Ftw-data-packs%2Fregulated-supplier-compliance",
      "with_payment_authority": "Use an x402-capable client to read PAYMENT-REQUIRED, sign locally, and retry resource_url with x-payment.",
      "without_payment_authority": "Return approval_url to the human buyer and wait for consent before spending."
    },
    "human_checkout": {
      "url": "https://api.sourcestrand.com/checkout?resource_url=https%3A%2F%2Fapi.sourcestrand.com%2Fv1%2Fpaid%2Ftw-data-packs%2Fregulated-supplier-compliance",
      "action": "Pay and Download",
      "expected_result": "The checkout signs locally, retries resource_url with x-payment, and downloads the paid JSON response.",
      "wallet_requirement": "Open this URL in Coinbase Wallet, MetaMask, or another EIP-1193 wallet-enabled browser."
    },
    "checkout_action": "Pay and Download",
    "free_sample_url": null,
    "troubleshooting": [
      "missing_payment_header means no x-payment header was sent; for browser clicks or plain fetch, this is the expected first stop.",
      "invalid_payment_header means the x-payment header could not be decoded.",
      "payment_requirements_mismatch means the signed payment does not match the current resource requirements.",
      "payment_verification_failed or payment_verification_unavailable means the facilitator rejected or could not check the payment.",
      "payment_settlement_failed or payment_settlement_unavailable means verification may have passed but settlement failed or timed out.",
      "Use the same network and asset listed in this response; this production gateway expects Base mainnet."
    ],
    "buyer_next_steps": [
      "Inspect free_preview_url or free_sample_url before paying.",
      "Human browser users should open pay_now_url and choose Pay and Download.",
      "Fund a Base mainnet wallet with the requested USDC asset and enough ETH for gas.",
      "Use an x402-compatible client to call resource_url. The client should read PAYMENT-REQUIRED, sign locally, and retry automatically.",
      "Retry the same resource_url with the x-payment header and a stable x-buyer-hint or buyer_hint query parameter.",
      "If the client already sent x-payment, compare network, asset, amount, and payTo against the fresh x402 accepts in this response."
    ],
    "free_preview_url": "https://api.sourcestrand.com/v1/preview/tw-data-packs/regulated-supplier-compliance?buyer_hint=web-402",
    "smoke_client_env": {
      "NETWORK": "eip155:8453",
      "BUYER_HINT": "partner-or-campaign-name",
      "X402_PRODUCT": "tw_regulated_supplier_compliance_pack",
      "PAID_GATEWAY_BASE_URL": "https://api.sourcestrand.com"
    },
    "buyer_hint_header": "x-buyer-hint: partner-or-campaign-name",
    "payment_intent_url": "https://api.sourcestrand.com/v1/payment/intent?resource_url=https%3A%2F%2Fapi.sourcestrand.com%2Fv1%2Fpaid%2Ftw-data-packs%2Fregulated-supplier-compliance",
    "x402_resources_url": "https://api.sourcestrand.com/.well-known/x402/resources.json",
    "buyer_hint_query_param": "buyer_hint=partner-or-campaign-name",
    "required_payment_header": "x-payment",
    "browser_wallet_payment_supported": true
  }
}

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",
      "price": "$0.03",
      "version": "2"
    },
    "payTo": "0xCc28F533F7ED90B8B98b5E9614B96138e790267F",
    "amount": "30000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 60
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {}
      },
      "output": {
        "type": "json",
        "example": {
          "product": "tw_regulated_supplier_compliance_pack",
          "streams": [],
          "limitations": [],
          "data_lineage": [],
          "agent_handoff": {},
          "package_scope": {
            "tier": "paid_pack"
          },
          "record_backed_pack": {}
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET",
                "HEAD",
                "DELETE"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "properties": {}
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    },
    "routeTemplate": "/v1/paid/tw-data-packs/regulated-supplier-compliance"
  }
}

Provenance

Seen in the source catalog

2026-07-13 07:39Z

Last indexed by Roundhouse

2026-07-13 23:40Z

Last enriched (probe, favicon, geo)

2026-09-21 06:45Z

x402 version

2

Max timeout

60s

Liveness probe

HTTP 530