Concordance

payment-readyonline

payment-ready until 2026-11-17

Aggregates 18 free and keyed data sources (SEC EDGAR, FRED, GDELT, arXiv, court opinions, market data, Wikipedia, and more) into 6 x402-priced tools: full-text search, economic/financial time series, cross-category digest, cross-source company briefs, source corroboration scoring, and chronological timelines.

Compare: all SEC filings APIs · all crypto price APIs

concordancehq.duckdns.org ↗

Call it x402 v2

x402 v2

Base URL: https://concordancehq.duckdns.org
Payment: x402 v2, header channel

$ curl -i -X POST 'https://concordancehq.duckdns.org/tools/company-brief'

An unpaid request returns HTTP 402 with the payment terms. Sign a payment authorization, then retry with the PAYMENT-SIGNATURE header.

Endpoints 6 paid routes on concordancehq.duckdns.org

POST/tools/company-briefBase+Sol$0.05since 08-12

POST/tools/corroborationBase+Sol$0.04since 08-12

POST/tools/digestBase+Sol$0.03since 08-12

POST/tools/searchBase+Sol$0.01since 08-12

POST/tools/seriesBase+Sol$0.01since 08-12

POST/tools/timelineBase+Sol$0.03since 08-12

Prices as captured in the 402 response: median $0.03 across the 6 endpoints.

Example 402 response

Endpoints and prices

Current paid endpoints; minimum quoted prices in USD where available; first capture dates in UTC
Method	Path	Description	Price	Network	Asset	402 channel	Captured
POST	/tools/company-brief	Cross-source correlation for one company in a single call: latest quotes from 3 independent market-data providers, recent SEC filings, and general mentions across news/academic/legal/dev-community sources -- joins data no single-source provider offers together. Accepts a ticker (AAPL) or company name (Apple).	$0.05	Base+Sol	USDC	header	since 08-12
POST	/tools/corroboration	Is a claim independently corroborated across multiple unrelated sources, or does it trace back to a single origin? Groups matches by SOURCE (not category) so a caller sees exactly how many independent outlets/agencies back a claim -- a trust signal no single-source competitor can offer, since it requires already owning many independent sources.	$0.04	Base+Sol	USDC	header	since 08-12
POST	/tools/digest	One call, every category: pulls everything matching a topic across all aggregated sources and groups it by category (news, legal, academic, dev community, ...) with counts -- replaces manually calling /tools/search once per category and merging results yourself. Structured aggregation, not an AI-generated summary.	$0.03	Base+Sol	USDC	header	since 08-12
POST	/tools/search	Full-text search across every aggregated data source in one call: news, SEC filings, court opinions, academic papers, government records, and developer discussions. One query surfaces everything concordant across independently-sourced, citable results -- not a single-source wrapper. Optional source/category/since filters.	$0.01	Base+Sol	USDC	header	since 08-12
POST	/tools/series	Tabular time-series lookup across economic indicators (FRED, World Bank, UN Comtrade), crypto TVL, weather, and stock quotes -- by source + series_id, with an optional date range.	$0.01	Base+Sol	USDC	header	since 08-12
POST	/tools/timeline	How has coverage of a topic developed over time, across every aggregated source? Chronologically ordered (oldest first) -- unlike /tools/search (relevance-ranked) or /tools/digest (grouped by category) -- for tracking a story's evolution or an emerging trend across independently-sourced outlets in one call.	$0.03	Base+Sol	USDC	header	since 08-12

Payment evidence

402 payload captured at 2026-08-12 13:46:01 UTC. Check evidence JSON · Measurement methodology.

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x1f5f8474fA0dc1Fde79187abd68Ef8Ea15ADAe34",
      "amount": "10000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
      },
      "payTo": "yEx9WBP1NnzoTpDmi67F536bso3YNcQPBRhWRoswTBS",
      "amount": "10000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://concordancehq.duckdns.org/tools/search",
    "tags": [
      "search",
      "aggregator",
      "full-text-search",
      "multi-source",
      "news"
    ],
    "iconUrl": "https://concordancehq.duckdns.org/static/logo.jpg",
    "mimeType": "application/json",
    "description": "Full-text search across every aggregated data source in one call: news, SEC filings, court opinions, academic papers, government records, and developer discussions. One query surfaces everything concordant across independently-sourced, citable results -- not a single-source wrapper. Optional source/category/since filters.",
    "serviceName": "search"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "limit": 10,
            "query": "central bank interest rate"
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        },
        "output": {
          "type": "json",
          "example": {
            "count": 1,
            "results": [
              {
                "url": "https://example.com/article",
                "title": "Central bank signals rate cut",
                "source": "gdelt",
                "content": "Central bank signals rate cut",
                "category": "news_events",
                "metadata": {
                  "domain": "example.com"
                },
                "published_at": "2026-07-19T18:30:00+00:00"
              }
            ]
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "properties": {
              "body": {
                "type": "object",
                "required": [
                  "query"
                ],
                "properties": {
                  "limit": {
                    "type": "integer"
                  },
                  "query": {
                    "type": "string"
                  },
                  "since": {
                    "type": "string"
                  },
                  "source": {
                    "type": "string"
                  },
                  "category": {
                    "type": "string"
                  }
                }
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "POST",
                  "PUT",
                  "PATCH"
                ],
                "type": "string"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Other captured 402 responses (5)

Captured payload 2 of 6

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x1f5f8474fA0dc1Fde79187abd68Ef8Ea15ADAe34",
      "amount": "10000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
      },
      "payTo": "yEx9WBP1NnzoTpDmi67F536bso3YNcQPBRhWRoswTBS",
      "amount": "10000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://concordancehq.duckdns.org/tools/series",
    "tags": [
      "economic-data",
      "time-series",
      "market-data",
      "stock-quotes",
      "trade-data"
    ],
    "iconUrl": "https://concordancehq.duckdns.org/static/logo.jpg",
    "mimeType": "application/json",
    "description": "Tabular time-series lookup across economic indicators (FRED, World Bank, UN Comtrade), crypto TVL, weather, and stock quotes -- by source + series_id, with an optional date range.",
    "serviceName": "series"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "source": "fred",
            "series_id": "GDP"
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        },
        "output": {
          "type": "json",
          "example": {
            "points": [
              {
                "value": 100,
                "observed_at": "2026-01-01"
              }
            ],
            "source": "fred",
            "series_id": "GDP"
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "properties": {
              "body": {
                "type": "object",
                "required": [
                  "source",
                  "series_id"
                ],
                "properties": {
                  "end": {
                    "type": "string"
                  },
                  "start": {
                    "type": "string"
                  },
                  "source": {
                    "type": "string"
                  },
                  "series_id": {
                    "type": "string"
                  }
                }
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "POST",
                  "PUT",
                  "PATCH"
                ],
                "type": "string"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Captured payload 3 of 6

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x1f5f8474fA0dc1Fde79187abd68Ef8Ea15ADAe34",
      "amount": "30000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
      },
      "payTo": "yEx9WBP1NnzoTpDmi67F536bso3YNcQPBRhWRoswTBS",
      "amount": "30000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://concordancehq.duckdns.org/tools/digest",
    "tags": [
      "digest",
      "topic-search",
      "briefing",
      "cross-category",
      "aggregator"
    ],
    "iconUrl": "https://concordancehq.duckdns.org/static/logo.jpg",
    "mimeType": "application/json",
    "description": "One call, every category: pulls everything matching a topic across all aggregated sources and groups it by category (news, legal, academic, dev community, ...) with counts -- replaces manually calling /tools/search once per category and merging results yourself. Structured aggregation, not an AI-generated summary.",
    "serviceName": "digest"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "topic": "cryptocurrency regulation",
            "per_category_limit": 5
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        },
        "output": {
          "type": "json",
          "example": {
            "topic": "cryptocurrency regulation",
            "categories": [
              {
                "count": 2,
                "category": "legal",
                "top_results": [
                  {
                    "url": "https://www.regulations.gov/document/EPA-HQ-OAR-2022-0985-3228",
                    "title": "Tracking electricity consumption from U.S. cryptocurrency mining",
                    "source": "regulations_gov",
                    "content": "IN-DEPTH ANALYSIS cryptocurrency mining",
                    "published_at": "2024-04-22T04:00:00Z"
                  }
                ]
              }
            ],
            "total_count": 4
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "properties": {
              "body": {
                "type": "object",
                "required": [
                  "topic"
                ],
                "properties": {
                  "since": {
                    "type": "string"
                  },
                  "topic": {
                    "type": "string"
                  },
                  "per_category_limit": {
                    "type": "integer"
                  }
                }
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "POST",
                  "PUT",
                  "PATCH"
                ],
                "type": "string"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Captured payload 4 of 6

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x1f5f8474fA0dc1Fde79187abd68Ef8Ea15ADAe34",
      "amount": "50000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
      },
      "payTo": "yEx9WBP1NnzoTpDmi67F536bso3YNcQPBRhWRoswTBS",
      "amount": "50000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://concordancehq.duckdns.org/tools/company-brief",
    "tags": [
      "company-data",
      "stock-quotes",
      "sec-filings",
      "financial-data",
      "correlation"
    ],
    "iconUrl": "https://concordancehq.duckdns.org/static/logo.jpg",
    "mimeType": "application/json",
    "description": "Cross-source correlation for one company in a single call: latest quotes from 3 independent market-data providers, recent SEC filings, and general mentions across news/academic/legal/dev-community sources -- joins data no single-source provider offers together. Accepts a ticker (AAPL) or company name (Apple).",
    "serviceName": "company_brief"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "company": "AAPL",
            "per_section_limit": 5
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        },
        "output": {
          "type": "json",
          "example": {
            "cik": "0000320193",
            "ticker": "AAPL",
            "company": "Apple",
            "mentions": [],
            "market_data": [
              {
                "value": 333.74,
                "source": "finnhub",
                "observed_at": "2026-07-18"
              }
            ],
            "recent_filings": [
              {
                "url": "https://www.sec.gov/Archives/edgar/data/320193/...",
                "title": "Apple Inc. - 10-K filing",
                "source": "sec_edgar",
                "content": "Apple Inc. filed Form 10-K",
                "category": "corporate_financial",
                "published_at": "2026-06-17"
              }
            ]
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "properties": {
              "body": {
                "type": "object",
                "required": [
                  "company"
                ],
                "properties": {
                  "company": {
                    "type": "string"
                  },
                  "per_section_limit": {
                    "type": "integer"
                  }
                }
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "POST",
                  "PUT",
                  "PATCH"
                ],
                "type": "string"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Captured payload 5 of 6

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x1f5f8474fA0dc1Fde79187abd68Ef8Ea15ADAe34",
      "amount": "40000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
      },
      "payTo": "yEx9WBP1NnzoTpDmi67F536bso3YNcQPBRhWRoswTBS",
      "amount": "40000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://concordancehq.duckdns.org/tools/corroboration",
    "tags": [
      "fact-checking",
      "trust-signal",
      "source-verification",
      "claim-checking",
      "multi-source"
    ],
    "iconUrl": "https://concordancehq.duckdns.org/static/logo.jpg",
    "mimeType": "application/json",
    "description": "Is a claim independently corroborated across multiple unrelated sources, or does it trace back to a single origin? Groups matches by SOURCE (not category) so a caller sees exactly how many independent outlets/agencies back a claim -- a trust signal no single-source competitor can offer, since it requires already owning many independent sources.",
    "serviceName": "corroboration"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "claim": "the Federal Reserve raised interest rates"
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        },
        "output": {
          "type": "json",
          "example": {
            "claim": "the Federal Reserve raised interest rates",
            "sources": [
              {
                "count": 4,
                "source": "gdelt",
                "top_url": "https://example.com/article",
                "category": "news_events",
                "top_title": "Fed raises rates by 25bps",
                "top_published_at": "2026-07-19T18:30:00+00:00"
              }
            ],
            "total_matches": 7,
            "corroboration_level": "corroborated",
            "distinct_source_count": 3
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "properties": {
              "body": {
                "type": "object",
                "required": [
                  "claim"
                ],
                "properties": {
                  "claim": {
                    "type": "string"
                  },
                  "since": {
                    "type": "string"
                  },
                  "raw_pull_limit": {
                    "type": "integer"
                  }
                }
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "POST",
                  "PUT",
                  "PATCH"
                ],
                "type": "string"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Captured payload 6 of 6

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x1f5f8474fA0dc1Fde79187abd68Ef8Ea15ADAe34",
      "amount": "30000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
      },
      "payTo": "yEx9WBP1NnzoTpDmi67F536bso3YNcQPBRhWRoswTBS",
      "amount": "30000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://concordancehq.duckdns.org/tools/timeline",
    "tags": [
      "timeline",
      "trend-tracking",
      "chronological",
      "story-evolution",
      "multi-source"
    ],
    "iconUrl": "https://concordancehq.duckdns.org/static/logo.jpg",
    "mimeType": "application/json",
    "description": "How has coverage of a topic developed over time, across every aggregated source? Chronologically ordered (oldest first) -- unlike /tools/search (relevance-ranked) or /tools/digest (grouped by category) -- for tracking a story's evolution or an emerging trend across independently-sourced outlets in one call.",
    "serviceName": "timeline"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "limit": 10,
            "topic": "cryptocurrency regulation"
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        },
        "output": {
          "type": "json",
          "example": {
            "count": 1,
            "topic": "cryptocurrency regulation",
            "timeline": [
              {
                "url": "https://www.regulations.gov/document/EPA-HQ-OAR-2022-0985-3228",
                "title": "Tracking electricity consumption from U.S. cryptocurrency mining",
                "source": "regulations_gov",
                "category": "legal",
                "published_at": "2026-04-22T04:00:00Z"
              }
            ],
            "undated_count": 0
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "properties": {
              "body": {
                "type": "object",
                "required": [
                  "topic"
                ],
                "properties": {
                  "limit": {
                    "type": "integer"
                  },
                  "since": {
                    "type": "string"
                  },
                  "topic": {
                    "type": "string"
                  }
                }
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "POST",
                  "PUT",
                  "PATCH"
                ],
                "type": "string"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Can I trust it score from our own monitoring

score from our own monitoring

84/100 Solid

                           │         │    ····│···
0                          55        75       93

                │     │   ·│··
0               55    75   93

#236 of 474 in Data. Bands: strong 93+, solid 75+, mixed 55+, weak below 55.

Reliability: 100% uptime 30d
Compliance: A 14/14 checks pass
Price: $0.01 to $0.05 p61 in Data
Risk: clean no risk flag
Traction: $0.00 30d 0 buyers

14/14 compliance checks

402 payload captured
accepts[] array present
payTo address recoverable
payTo at accepts[0].payTo (conformant shape)
payTo is a valid on-chain address
atomic price declared
atomic price in a sane range
asset (token) address declared
network resolves to CAIP-2
payment scheme declared
served over HTTPS
declares the current x402 version (2)
EIP-712 domain parameters present on every EVM entry
x402 v2 envelope delivered in the payment-required header

402 terms unchanged since 2026-08-12. Last up 2026-11-10.

── Site signals

homepage reachable
openapi doc
pricing page
llms.txt
robots.txt
terms page

How the score works

What the score read on this service: status online, 100% uptime 30d, 423ms response p95, x402 compliance 14 of 14, $0.01 price against the category, on-chain traction measured. Each of those is measured, and each is published in full below.

The score comes from our own monitoring, never from reviews, operator claims, or a language model: reliability, x402 compliance, price against the category, a deterministic risk flag, and a small on-chain traction term, weighted by ranking generation 3. It is not placement anyone can buy: the paid verify tier is reported beside it and is not one of its inputs. Every component below stays published and read-only.

Bands on the 0 to 100 measured score: strong at 93 and above, solid from 75, mixed from 55, weak below 55. Price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, so the score places a service in its own field.

It is a score inside Data, and only there: price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, which here means 474 listings, this one among them: the same 474 the position above is counted against. When the two differ, the field is the wider one, because a listing we have measured too little of to rank still sits in the field the price and the speed are normalized over. The same service in a different field would read differently. The same engine answers GET /api/v1/best, and asked for a different pool (the whole directory, or another filter) it returns a different number for this service under this same ranking generation. Neither is more correct: they answer different questions, and the methodology states which is which.

Traction is a conservative undercount.

All measured facts

What it does

Concordance is a listed x402 Data API. Captured payment terms name Base, Solana. Monitoring and settlement figures below describe the observations available to this directory; an unpaid HTTP 402 check does not prove that a paid call will deliver.

Assessment computed at 2026-11-10 18:43:51 UTC. Latest service check observed at 2026-11-10 22:18:05 UTC. Service data JSON · Measurement methodology.

Page rendered at 2026-11-10 22:28:36 UTC. This response time is separate from the observation and computation times attached to each measurement.

Latest endpoint observation: 2026-11-10 22:18:05 UTC. Latest price capture: 2026-08-12 13:45:57 UTC. Prices are recorded quotes, not a promise of availability. Token assets and payment terms are listed separately. Endpoint data JSON · Price history JSON · Measurement methodology.

Assessment computed at 2026-11-10 18:43:51 UTC. Uptime uses the stated daily-rollup window; response times are in milliseconds, compliance is passed/evaluated checks, and traction is a measured settlement floor. The comparison score is out of 100 within this category. Assessment JSON · Measurement methodology.

Observed daily coverage: 2026-10-12 to 2026-11-10 UTC. Daily monitoring and settlement rollups do not expose their computation time; a bucket date is not an update timestamp. Uptime and response JSON · Volume JSON · Buyers JSON · Measurement methodology.

Ranked from the measured category pool, refreshed at most once a minute. The comparison has no persisted computation timestamp; the assessment time above belongs to this service only. Ranking API documentation · Ranking methodology.

x402 List home · Services · Data

uptime · latest daily rollup: 100%
uptime 7d: 100%
uptime 30d: 100%
uptime 90d: 100%
response p95: 423ms
avg response: 339ms
total checks: 4,062

Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.

price (min): $0.01
price (max): $0.05
category percentile (min): p61 in Data
category percentile (max): p58 in Data
endpoints / prices: 6 / 4
model: tiered
stability: 100%

No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.

domain age: -
registrar: -
hosting: free host
domain created: ---

Identity facts, not a risk score.

assessment volume 30d: $0.00
exact assessment volume 30d (USD): 0
assessment recorded at (UTC): 2026-11-10T18:43:51.500Z
buyers 30d: 0
settlements 30d: 0
measured since: --- (start of our harvest window)
last settlement: ---
top buyer share: -
top 3 buyers share: -
concentrated volume: no
trend 7d vs 30d: -
networks: eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpKuc147dw2N9d
volume all-time: $0
settlements all-time: 0
median settlement 30d: -
max settlement 30d: -

Assessment volume uses the latest 30d assessment. Over time sums daily address snapshots, rounded to cents and refreshed separately. The two sources can differ in timing, precision and shared-address attribution. Amounts use cents for comparison; known sub-cent values keep up to 12 significant digits. The exact stored assessment value is shown above.

Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.

Top buyer share lowers the on-chain traction part of the ranking score behind this page's verdict and /best, by up to half when one address holds all 30d volume. The Recommended and Highest volume sorts of the services list do not use it; they use the Concentrated volume rule instead.

member since: 2026-08-12

Recent checks

Latest 18 unpaid HTTP checks, newest first; response times in milliseconds, observation times in UTC
Checked at (UTC)	Status	HTTP	Response	Endpoints
2026-11-10 22:18:05 UTC	Online	402	215ms	6
2026-11-10 22:02:04 UTC	Online	402	322ms	6
2026-11-10 21:45:06 UTC	Online	402	216ms	6
2026-11-10 21:29:07 UTC	Online	402	240ms	6
2026-11-10 21:13:06 UTC	Online	402	429ms	6
2026-11-10 20:57:03 UTC	Online	402	383ms	6
2026-11-10 20:41:03 UTC	Online	402	224ms	6
2026-11-10 20:25:05 UTC	Online	402	375ms	6
2026-11-10 20:09:03 UTC	Online	402	223ms	6
2026-11-10 19:53:03 UTC	Online	402	218ms	6
2026-11-10 19:37:03 UTC	Online	402	344ms	6
2026-11-10 19:21:05 UTC	Online	402	431ms	6
2026-11-10 19:05:04 UTC	Online	402	408ms	6
2026-11-10 18:49:05 UTC	Online	402	420ms	6
2026-11-10 18:33:05 UTC	Online	402	404ms	6
2026-11-10 18:17:05 UTC	Online	402	237ms	6
2026-11-10 18:01:06 UTC	Online	402	317ms	6
2026-11-10 17:45:04 UTC	Online	402	435ms	6

Changes0 in 30d

No changes recorded in the last 30 days.

all changes

Over time

On-chain volume daily snapshots, USD 30d: $0.00

                                                                                                 
                                                                                                 
                                                                                                 
                                                                                                 
                                                                                                 
       ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  
    $0

volume no data in the payload

Distinct buyers per dayDistinct buyers per day

        ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·  ·

Uptime 1 of 29 completed days below 100%

       ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ▇▇ ██ ██ ██ ██ ██ ██ ██ ██

uptime below 100%, to scale

       10-12                                     10-26                                   11-10*

Volume 30d: $0.00
Uptime: 1 of 29 completed days below 100%

Daily on-chain settlement volume in US dollars, 2026-10-12 to 2026-11-10; 30 days have no data in the payload; distinct buyers per day

Day    Volume             USD  Buyers
10-12  · no data, 30 days to 11-10*

More charts

Response time daily average, ms min 220ms, avg 303ms, max 526ms

       ▄▄ ▄▄ ▄▄ ▄▄ ▅▅ ▇▇ ▄▄ ▃▃ ▄▄ ▄▄ ▅▅ ██ ▅▅ ▆▆ ▄▄ ▄▄ ▄▄ ▅▅ ▄▄ ▄▄ ▅▅ ▅▅ ▄▄ ▅▅ ▅▅ ▄▄ ▅▅ ▄▄ ▄▄ ▅▅

10-12 to 11-10* UTC

      ▄▄▄▄▅▇▄▃▄▄▅█▅▆▄▄▄▅▄▄▅▅▄▅▅▄▅▄▄▅

      10-12         10-26     11-10*

Scores over time

x402 compliance low 14/14, high 14/14

       ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄

10-12 to 11-10* UTC

      ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄

      10-12         10-26     11-10*

Price percentile in Data own low to high; exact values below

       ▇▇ ▇▇ ▇▇ ▇▇ ▁▁ ▁▁ ▇▇ ▁▁ ▁▁ ▁▁ ▇▇ ▇▇ ▇▇ ▇▇ ▁▁ ▁▁ ▁▁ ▁▁ ▁▁ ▁▁ ▁▁ ▁▁ ▁▁ ▁▁ ▁▁ ▁▁ ▁▁ ▁▁ ▁▁ ▁▁

10-12 to 11-10* UTC

      ▇▇▇▇▁▁▇▁▁▁▇▇▇▇▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁

      10-12         10-26     11-10*

Site signals present (of 6) own low to high; exact values below

       ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄ ▄▄

10-12 to 11-10* UTC

      ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄

      10-12         10-26     11-10*

       10-12                                     10-26                                   11-10*

      10-12         10-26     11-10*

Scores: one day per column, 10-12 to 11-10*, on the columns of Response time. Uptime held below 100% on some days in this window, including any partial day. Daily readings remain in the Uptime strip and Values. The checklist grew from 11 to 14 checks on 2026-07-28, before this window. Pillar lines use their own low and high. Exact dated readings are available in each readout and in Values.

Each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/concordance/price, /scores, /volume and /buyers.

Values

* today so far, partial (UTC).

The uptime summary counts completed UTC days only. The strip, readouts and table retain today's partial reading.

Daily snapshot total, no volume data in the last 30d. The visible 30d total in Traction comes from the latest assessment. These sources can differ in their window, refresh time, cent rounding and shared-address attribution.

Daily address snapshots: 2026-10-12 to 2026-11-10 UTC; * today so far, partial (UTC). Daily snapshots store cents. A recorded $0.00 with settlements cannot distinguish exact zero from volume rounded away. Lost precision is unavailable here.

Settlement volume uses the stored USD valuation of tracked payments; it is distinct from token quantities. USD-pegged assets are valued at 1 USD per token in these rollups. The measured settlement floor does not cover all payments to this service.

Assessment history last recorded at 2026-11-10 18:43:51 UTC. Each UTC day uses its last recorded run; missing readings stay unmeasured. Assessment history JSON · Measurement methodology.

Daily values, 2026-10-12 to 2026-11-10: address settlement volume in USD, distinct buyer and settlement counts, uptime percent, average response milliseconds, compliance passed/total, price percentile 0-100, site signals out of 6; UTC dates
Day	Volume	Buyers	Settlements	Uptime	Response	Compliance	Price percentile	Site signals
2026-10-12	no data	no data	no data	100%	244.84ms	14/14	p62	3/6
2026-10-13	no data	no data	no data	100%	279.94ms	14/14	p62	3/6
2026-10-14	no data	no data	no data	100%	255.28ms	14/14	p62	3/6
2026-10-15	no data	no data	no data	100%	283.90ms	14/14	p62	3/6
2026-10-16	no data	no data	no data	100%	316.69ms	14/14	p61	3/6
2026-10-17	no data	no data	no data	100%	459.91ms	14/14	p61	3/6
2026-10-18	no data	no data	no data	100%	246.47ms	14/14	p62	3/6
2026-10-19	no data	no data	no data	100%	219.69ms	14/14	p61	3/6
2026-10-20	no data	no data	no data	100%	290.33ms	14/14	p61	3/6
2026-10-21	no data	no data	no data	100%	287.33ms	14/14	p61	3/6
2026-10-22	no data	no data	no data	100%	312.39ms	14/14	p62	3/6
2026-10-23	no data	no data	no data	100%	525.71ms	14/14	p62	3/6
2026-10-24	no data	no data	no data	100%	356.45ms	14/14	p62	3/6
2026-10-25	no data	no data	no data	100%	365.64ms	14/14	p62	3/6
2026-10-26	no data	no data	no data	100%	277.38ms	14/14	p61	3/6
2026-10-27	no data	no data	no data	100%	287.00ms	14/14	p61	3/6
2026-10-28	no data	no data	no data	100%	266.40ms	14/14	p61	3/6
2026-10-29	no data	no data	no data	100%	321.74ms	14/14	p61	3/6
2026-10-30	no data	no data	no data	100%	271.09ms	14/14	p61	3/6
2026-10-31	no data	no data	no data	100%	295.44ms	14/14	p61	3/6
2026-11-01	no data	no data	no data	100%	332.61ms	14/14	p61	3/6
2026-11-02	no data	no data	no data	98.86%	317.62ms	14/14	p61	3/6
2026-11-03	no data	no data	no data	100%	263.06ms	14/14	p61	3/6
2026-11-04	no data	no data	no data	100%	313.93ms	14/14	p61	3/6
2026-11-05	no data	no data	no data	100%	330.02ms	14/14	p61	3/6
2026-11-06	no data	no data	no data	100%	244.50ms	14/14	p61	3/6
2026-11-07	no data	no data	no data	100%	305.01ms	14/14	p61	3/6
2026-11-08	no data	no data	no data	100%	253.72ms	14/14	p61	3/6
2026-11-09	no data	no data	no data	100%	261.07ms	14/14	p61	3/6
2026-11-10*	no data	no data	no data	100%	314.73ms	14/14	p61	3/6

Alternatives in Data

Tarnak x402 Toolkit strong 98/100 100% up 30d --- 30d

Imagio Relay · 57 x402 tools for agents (web-intel, trade math, infra, docs) strong 98/100 100% up 30d --- 30d

Weather strong 98/100 99.9% up 30d --- 30d

Agent Tools (pay-per-call utilities for AI agents) strong 98/100 100% up 30d --- 30d

CrawlWitness strong 98/100 100% up 30d --- 30d

5 of 473 other ranked services in Data, ordered by the same measured score.

see the whole category

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