●

Concordance

Data PAYMENT-READY

payment-ready until 2026-09-14

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.

Pay from $0.01 to $0.05 per request in USDC on Base / Solana, settled onchain via the x402 protocol, no signup, no API key needed.

measured since 2026-07-22 (start of our harvest window) · $0 all-time · last settled 2026-09-06

BASE URL https://concordancehq.duckdns.org │ WEBSITE https://concordancehq.duckdns.org │ ENDPOINTS 6 │ NETWORK Base / Solana │ ASSET USDC │ MEMBER SINCE 2026-08-12 │ MONITORED SINCE 2026-08-12

VERDICT

ranking generation 3

solid 84/100 #208 of 265 in Data by measured score

What the score read on this service: status online, 100% uptime 30d, 738ms 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.

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 265 listings, this one among them. That set is wider than the 265 the position above is counted against, 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.

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.

ALTERNATIVES IN DATA

Other Data services in this directory, ordered by the same measured score. The figures are ours: 30-day uptime from our own probes, 30-day settlement volume read on-chain (a conservative undercount, and null where we cannot measure it, never a zero).

Ranked alternative x402 services in the same category, with band, measured score, 30-day uptime and 30-day on-chain settlement volume
SERVICE	BAND	SCORE	UPTIME 30D	VOL 30D
API Acre	strong	99	99.8%	---
AgentFund US Economic, SEC & On-Chain Data	strong	99	100%	---
Clink Forge	strong	99	98.6%	---
KR Crypto Intelligence	strong	98	100%	---
WhaleTape	strong	98	97.5%	---

5 of 264 other ranked services in Data · see the whole category

ASSESSMENT

updated 6h ago

The parts the verdict above is computed from, each with its proof. Click any chip. Measured values stay read-only; unknown is honest, and an unknown is never counted as a zero.

reliability 100%

uptime 24h: 100%
uptime 7d: 100%
uptime 30d: 100%
uptime 90d: 100%
response p95: 738ms
avg response: 388ms
total checks: 2,286

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

compliance A (14/14)

14 of 14 x402 conformance checks pass. Full checklist below.

jump to compliance checklist

price $0.01 to $0.05 (p60 in Data)

price (min): $0.01
price (max): $0.05
category percentile (min): p60 in Data
category percentile (max): p61 in Data
endpoints / prices: 6 / 4
model: tiered
stability: 100%

risk clean

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: 4891d
registrar: Gandi SAS
hosting: custom
domain created: 2013-04-12

Identity facts, not a risk score.

traction $0.00 30d · 0 buyers

volume 30d: $0.00
buyers 30d: 0
settlements 30d: 0
measured since: 2026-07-22 (start of our harvest window)
last settlement: 2026-09-06
top buyer share: -
trend 7d vs 30d: -
networks: eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpKuc147dw2N9d
volume all-time: $0
settlements all-time: 0
median settlement 30d: -
max settlement 30d: -
settled via: -

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

Top buyer share is a concentration signal, not part of the ranking score.

WHAT IT DOES

ai-derived

No AI synthesis has been produced for this service yet.

ENDPOINTS

Service endpoints with HTTP method, path, description, pricing, and network
METHOD	PATH	PRICE	NETWORK	ASSET	402 CHANNEL
POST	/tools/company-brief	$0.05	Base/Solana	USDC	header
POST	/tools/corroboration	$0.04	Base/Solana	USDC	header
POST	/tools/digest	$0.03	Base/Solana	USDC	header
POST	/tools/search	$0.01	Base/Solana	USDC	header
POST	/tools/series	$0.01	Base/Solana	USDC	header
POST	/tools/timeline	$0.03	Base/Solana	USDC	header

6 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to POST /tools/company-brief returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.

// request

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

// 402 response (captured by monitor) · 6 payloads · click to expand

[
  {
    "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
  },
  {
    "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
  },
  {
    "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
  },
  {
    "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
  },
  {
    "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
  },
  {
    "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
  }
]

OVER TIME

All charts use the 30d selector; 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. On-chain volume and distinct buyers are measured over the service's settlement address and are a conservative undercount (only settlements that reach a measured facilitator are counted). The on-chain series roll up hourly, so the latest day can be up to about an hour behind; distinct buyers are counted per payout address, so a service that settles to more than one address is an upper bound.

UPTIME

30d UPTIME 100%

RESPONSE TIME

AVG RESP 389ms

PRICE (captured 402, USD)

Median across 6 endpoints. Use the selector to isolate one.

SUB-SCORES (uptime + x402 compliance)

checklist grew 11->14 on 2026-07-28; a step here is a metric change, not a regression

PILLARS OVER TIME (measured)

price percentile in Data

site signals present (of 6)

Measured site and economics pillars from the assessment history, so the latest value shown elsewhere on this page reads as a point on a trend rather than a permanent state.

VOLUME (on-chain settlement, USD)

DISTINCT BUYERS

COMPLIANCE

14/14 checks pass · grade A

last 402 captured 2026-08-12 · last up 2026-09-07

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

SITE PILLARS

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

recent checks (18) live · click to expand

TIME STATUS RESP CAUSE

05:55:12 UTC ● SLOW 803ms

05:39:12 UTC ● OK 498ms

05:23:08 UTC ● OK 398ms

05:07:10 UTC ● OK 557ms

04:51:12 UTC ● SLOW 629ms

04:35:16 UTC ● SLOW 957ms

04:19:12 UTC ● OK 560ms

04:03:10 UTC ● OK 403ms

03:47:11 UTC ● OK 529ms

03:31:09 UTC ● SLOW 728ms

03:15:07 UTC ● SLOW 639ms

02:59:07 UTC ● OK 524ms

02:43:10 UTC ● SLOW 648ms

02:27:06 UTC ● OK 537ms

02:11:06 UTC ● SLOW 593ms

01:55:06 UTC ● OK 552ms

01:39:05 UTC ● SLOW 589ms

01:23:04 UTC ● OK 437ms

EMBED THIS BADGE

Show that Concordance is monitored on x402-list. Paste this on your site or README, it links back to this live listing.

status

Concordance uptime on x402-list — live uptime

// HTML

<a href="https://x402-list.com/services/concordance?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/concordance.svg" alt="Concordance listed on x402-list" height="28">
</a>

// Markdown

[![Concordance on x402-list](https://x402-list.com/badge/concordance.svg)](https://x402-list.com/services/concordance?utm_source=badge&utm_medium=referral&utm_campaign=embed)

// HTML · live uptime variant

<a href="https://x402-list.com/services/concordance?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/concordance.svg?data=uptime" alt="Concordance uptime on x402-list" height="28">
</a>

RUN THIS SERVICE?

Keep this listing accurate: propose changes to the name, description, website, category or add new endpoints to monitor. Ownership is verified with a domain proof and every change is reviewed manually; measured data stays read-only.

[ update this listing ]

Earn the verified tier: x402list pays a real call to this endpoint and, if it delivers, the service is delivery-verified. The fee covers the cost of the probe, not the badge; there is no refund if the call does not deliver. Agent and API only, no in-browser signing. See /api.

[ verify this service ($0.25) ]

To request delisting, email info@x402-list.com or update your listing at /services/concordance/update.