SourceStrand

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": "$0.01",
          "version": "2"
        },
        "payTo": "0xCc28F533F7ED90B8B98b5E9614B96138e790267F",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "https://api.sourcestrand.com/v1/paid/crypto/workbench/liquidity-volatility-watchlist",
      "tags": [
        "sourcestrand",
        "crypto-agent-signals",
        "crypto-workbench-pack",
        "workbench",
        "asset-coverage-readiness",
        "market-regime-digest",
        "liquidity-volatility-watchlist",
        "market-regime",
        "liquidity-volatility",
        "cross-asset-context",
        "dirty-work",
        "x402-bazaar",
        "paid-data-product",
        "liquidity volatility watchlist"
      ],
      "mimeType": "application/json",
      "description": "Liquidity Volatility Watchlist by SourceStrand Crypto Workbench Pack. Precomputed crypto liquidity, volatility, data-quality, review-priority, lineage, and limitations for AI agent triage.",
      "serviceName": "SourceStrand Crypto Agent Signal Pack"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {
              "pack": "liquidity-volatility-watchlist"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "rows": [],
              "product": "Crypto Agent Workbench Pack",
              "summary": {},
              "pack_key": "liquidity_volatility_watchlist",
              "limitations": [],
              "data_lineage": [],
              "not_financial_advice": true
            }
          }
        },
        "schema": {
          "type": "object",
          "$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",
                  "required": [
                    "pack"
                  ],
                  "properties": {
                    "pack": {
                      "enum": [
                        "asset-coverage-readiness",
                        "market-regime-digest",
                        "liquidity-volatility-watchlist"
                      ],
                      "type": "string",
                      "description": "Precomputed aggregate crypto workbench pack to fetch."
                    }
                  }
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        },
        "routeTemplate": "/v1/paid/crypto/workbench/liquidity-volatility-watchlist"
      }
    },
    "x402Version": 2
  },
  "error": "PAYMENT_REQUIRED",
  "price": "$0.01",
  "reason": "missing_payment_header",
  "message": "Payment is required.",
  "product_metadata": {
    "title": "Crypto Agent Signal Pack",
    "product_id": "crypto_agent_signals",
    "trial_policy": {
      "scope": "Controlled free preview for mainstream asset symbol lookups.",
      "anti_bulk_note": "Preview is lookup-only and does not expose pagination, bulk export, or complete paid payload fields.",
      "identity_headers": [
        "x-trial-key",
        "x-api-key",
        "x-buyer-hint"
      ],
      "default_daily_limit": 10,
      "default_monthly_unique_resource_limit": 50
    },
    "coverage_note": "Fixture baseline only; production upstream connectors require authorization, attribution, and caching review.",
    "advice_boundary": "Informational signal pack only; not investment, legal, tax, accounting, or trading instruction.",
    "buyer_value_props": [
      "Mainstream asset lookup supports BTC, ETH, SOL, SUI, and ADA without requiring contract addresses.",
      "Dirty-work pack resolves asset identity, freshness, answerability, evidence availability, and missing-data boundaries before downstream drafting.",
      "Workbench packs precompute cross-asset readiness, market-context digest, and liquidity/variability review triage.",
      "Precomputed signal buckets for liquidity, variability, data quality, freshness, and payment relevance.",
      "Decision-support metrics include 0-100 usability scores, flags, answerability, and calculation notes.",
      "Trend indicators include descriptive 30m, 1h, 4h, 6h, 8h, 24h, and 7d windows with change and average-distance context where relevant.",
      "Outputs are shaped for AI agents so buyers do not need to parse raw upstream payloads or derive the first-pass interpretation themselves."
    ],
    "free_sample_endpoint": "/samples/crypto-agent-signal-pack.json",
    "free_preview_endpoint": "/v1/preview/crypto/asset-signal?asset=BTC",
    "available_paid_endpoints": [
      {
        "path": "/v1/paid/crypto/asset-signal?asset=BTC",
        "price": "$0.01",
        "method": "GET",
        "best_for": "Mainstream BTC, ETH, SOL, SUI, or ADA context when the buyer or AI assistant only has an asset symbol.",
        "supported_assets": [
          "BTC",
          "ETH",
          "SOL",
          "SUI",
          "ADA"
        ]
      },
      {
        "path": "/v1/paid/crypto/dirty-work-pack?asset=BTC",
        "price": "$0.01",
        "method": "GET",
        "best_for": "Precomputed asset identity, freshness, answerability, and data-gap context for AI assistants.",
        "supported_assets": [
          "BTC",
          "ETH",
          "SOL",
          "SUI",
          "ADA"
        ]
      },
      {
        "path": "/v1/paid/crypto/workbench-pack?pack=asset-coverage-readiness",
        "price": "$0.01",
        "method": "GET",
        "best_for": "Cross-asset coverage, market-context digest, and review-priority packs for AI assistants.",
        "supported_packs": [
          "asset-coverage-readiness",
          "market-regime-digest",
          "liquidity-volatility-watchlist"
        ]
      },
      {
        "path": "/v1/paid/crypto/workbench/asset-coverage-readiness",
        "price": "$0.01",
        "method": "GET",
        "best_for": "Direct x402 resource for the Asset Coverage Readiness workbench stream."
      },
      {
        "path": "/v1/paid/crypto/workbench/market-regime-digest",
        "price": "$0.01",
        "method": "GET",
        "best_for": "Direct x402 resource for the Market Regime Digest workbench stream."
      },
      {
        "path": "/v1/paid/crypto/workbench/liquidity-volatility-watchlist",
        "price": "$0.01",
        "method": "GET",
        "best_for": "Direct x402 resource for the Liquidity Volatility Watchlist workbench stream."
      },
      {
        "path": "/v1/paid/crypto/token-risk-snapshot?chain=base&address=",
        "price": "$0.01",
        "method": "GET",
        "best_for": "Compact token context snapshots for AI agent workflows."
      },
      {
        "path": "/v1/paid/crypto/x402-ecosystem-brief",
        "price": "$0.01",
        "method": "GET",
        "best_for": "Compact x402 resource mix and stablecoin payment context for AI agents."
      }
    ],
    "precomputed_signal_fields": [
      "buyer_signal_summary",
      "decision_support_metrics.overall_score",
      "decision_support_metrics.metric_cards",
      "decision_support_metrics.flags",
      "decision_support_metrics.answerability",
      "dirty_work_completed",
      "workbench.summary",
      "workbench.rows",
      "asset_identity",
      "source_disagreement",
      "trend_indicators.windows",
      "trend_indicators.distance_to_average_bps",
      "trend_indicators.not_realtime",
      "agent_summary",
      "data_lineage",
      "limitations"
    ],
    "free_workbench_preview_endpoint": "/v1/preview/crypto/workbench-pack?pack=asset-coverage-readiness",
    "free_dirty_work_preview_endpoint": "/v1/preview/crypto/dirty-work-pack?asset=BTC"
  },
  "payment_instructions": {
    "asset": "USD Coin",
    "price": "$0.01",
    "network": "eip155:8453",
    "protocol": "x402",
    "client_hint": "Use an x402-compatible client such as @x402/fetch, or this repo's npm run x402:paid-gateway smoke client.",
    "safety_note": "Do not send wallet private keys to this API. The buyer client signs locally and sends the x-payment header.",
    "browser_note": "A normal browser will stop at HTTP 402. Use an x402-compatible client to sign the payment and retry the same resource_url with the x-payment header.",
    "resource_url": "https://api.sourcestrand.com/v1/paid/crypto/workbench/liquidity-volatility-watchlist",
    "free_sample_url": "https://api.sourcestrand.com/samples/crypto-agent-signal-pack.json",
    "troubleshooting": [
      "missing_payment_header means no x-payment header was sent.",
      "invalid_test_payment means the facilitator rejected the signed payment payload.",
      "payment_settlement_unavailable means verification 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.",
      "Fund a Base mainnet wallet with the requested USDC asset and enough ETH for gas.",
      "Call resource_url once to receive the PAYMENT-REQUIRED header and x402 accepts.",
      "Sign locally with an x402-compatible client; do not send private keys to this API.",
      "Retry the same resource_url with the x-payment header and a stable x-buyer-hint or buyer_hint query parameter."
    ],
    "free_preview_url": "https://api.sourcestrand.com/v1/preview/crypto/workbench-pack?pack=liquidity-volatility-watchlist&buyer_hint=web-402",
    "smoke_client_env": {
      "NETWORK": "eip155:8453",
      "BUYER_HINT": "partner-or-campaign-name",
      "X402_PRODUCT": "crypto_workbench_pack",
      "TEST_CRYPTO_PACK": "liquidity-volatility-watchlist",
      "PAID_GATEWAY_BASE_URL": "https://api.sourcestrand.com"
    },
    "buyer_hint_header": "x-buyer-hint: partner-or-campaign-name",
    "buyer_hint_query_param": "buyer_hint=partner-or-campaign-name"
  }
}

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": "$0.01",
      "version": "2"
    },
    "payTo": "0xCc28F533F7ED90B8B98b5E9614B96138e790267F",
    "amount": "10000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 60
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "pack": "liquidity-volatility-watchlist"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "rows": [],
          "product": "Crypto Agent Workbench Pack",
          "summary": {},
          "pack_key": "liquidity_volatility_watchlist",
          "limitations": [],
          "data_lineage": [],
          "not_financial_advice": true
        }
      }
    },
    "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",
              "required": [
                "pack"
              ],
              "properties": {
                "pack": {
                  "enum": [
                    "asset-coverage-readiness",
                    "market-regime-digest",
                    "liquidity-volatility-watchlist"
                  ],
                  "type": "string",
                  "description": "Precomputed aggregate crypto workbench pack to fetch."
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    },
    "routeTemplate": "/v1/paid/crypto/workbench/liquidity-volatility-watchlist"
  }
}

Provenance

Seen in the source catalog

2026-07-22 08:47Z

Last indexed by Roundhouse

2026-08-10 08:20Z

Last enriched (probe, favicon, geo)

2026-09-14 16:46Z

x402 version

2

Max timeout

60s

Liveness probe

HTTP 530