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": "$0.03",
          "version": "2"
        },
        "payTo": "0xCc28F533F7ED90B8B98b5E9614B96138e790267F",
        "amount": "30000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "https://api.sourcestrand.com/v1/paid/tw-data-packs/public-company-signals",
      "tags": [
        "taiwan-data",
        "public-company",
        "monthly-revenue",
        "esg",
        "patent-trends",
        "research-signals",
        "record-backed-pack",
        "official-source-records",
        "english-field-map",
        "buyer-pack",
        "paid-data-product"
      ],
      "mimeType": "application/json",
      "description": "Taiwan public-company signals pack. Listed-company profile, monthly revenue, ESG, patent, and risk-policy streams packaged for research agents with not-investment-advice boundaries.",
      "serviceName": "Taiwan Public Company Signals Pack"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {}
          },
          "output": {
            "type": "json",
            "example": {
              "product": "tw_public_company_signals_pack",
              "streams": [],
              "limitations": [],
              "data_lineage": [],
              "agent_handoff": {},
              "package_scope": {
                "tier": "paid_pack"
              },
              "record_backed_pack": {}
            }
          }
        },
        "schema": {
          "type": "object",
          "$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/public-company-signals"
      }
    },
    "x402Version": 2
  },
  "error": "PAYMENT_REQUIRED",
  "price": "$0.03",
  "reason": "missing_payment_header",
  "message": "Payment is required.",
  "product_metadata": {
    "price": "$0.03",
    "title": "Taiwan Public Company Signals Pack",
    "not_for": [
      "Financial advice, valuation output, allocation guidance, or trading signal.",
      "Credit scoring, ESG scoring, legal advice, procurement advice, or risk clearance.",
      "A complete raw history export across every public-company disclosure."
    ],
    "pack_type": "record_backed_buyer_pack",
    "product_id": "tw_public_company_signals_pack",
    "preview_url": "https://api.sourcestrand.com/v1/preview/tw-data-packs/public-company-signals",
    "deeper_packs": [
      {
        "pack_id": "tw_company_brief",
        "use_when": "The buyer has a listed-company business_id and needs company-level context.",
        "endpoint_template": "https://api.sourcestrand.com/v1/paid/tw-company/brief?business_id={business_id}"
      },
      {
        "pack_id": "tw_procurement_supplier_lead_pack",
        "use_when": "The buyer wants public procurement activity or incumbent context around a public company or sector.",
        "endpoint_template": "https://api.sourcestrand.com/v1/paid/tw-procurement/supplier-lead-pack?q={keyword}"
      },
      {
        "pack_id": "tw_trade_import_export_pack",
        "use_when": "The buyer wants trade category or country exposure streams adjacent to public-company research.",
        "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 ESG, labor, environment, or other public-risk streams in the same research packet.",
        "endpoint_template": "https://api.sourcestrand.com/v1/paid/tw-data-packs/compliance-risk"
      }
    ],
    "best_fit_buyers": [
      "AI research agents enriching Taiwan public-company watchlists with official-source context.",
      "B2B analysts linking public companies to revenue, patents, ESG, trade, or public-risk policy streams.",
      "Market researchers who need English buyer fields while preserving official source lineage."
    ],
    "paid_response_delta": [
      "Full public-company research pack with listed-company identity, monthly revenue, ESG, patent, trade, and policy stream contracts.",
      "Record shape examples, key fields, English payload fields, source refresh cadence, and storage policy for public-company enrichment.",
      "Not-investment-advice boundary language suitable for agent reports and watchlist enrichment.",
      "Agent handoff notes for preserving source attribution, original source-language values, limitations, and next company or 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%2Fpublic-company-signals",
    "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%2Fpublic-company-signals",
    "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/public-company-signals",
    "agent_handoff": {
      "approval_url": "https://api.sourcestrand.com/checkout?resource_url=https%3A%2F%2Fapi.sourcestrand.com%2Fv1%2Fpaid%2Ftw-data-packs%2Fpublic-company-signals",
      "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%2Fpublic-company-signals",
      "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%2Fpublic-company-signals",
      "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/public-company-signals?buyer_hint=web-402",
    "smoke_client_env": {
      "NETWORK": "eip155:8453",
      "BUYER_HINT": "partner-or-campaign-name",
      "X402_PRODUCT": "tw_public_company_signals_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%2Fpublic-company-signals",
    "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_public_company_signals_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/public-company-signals"
  }
}

Provenance

Seen in the source catalog

2026-07-13 07:40Z

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