{
  "x402Version": 2,
  "id": 30154,
  "slug": "30154",
  "resource": "https://api.polym.uk/screener",
  "description": "Ranked Polymarket market-flow screener with factual concentration and liquidity-compatibility fields for the observed window. BEFORE YOU PAY: free substitute https://dash.polym.uk/markets.json. THIS ADDS: Little today, and we would rather you knew: the free snapshot has every field this route returns, for the whole decomposed set instead of the 40 rows this caps at, and it also carries the dominant-flow wallet that this route omits. Buy only if a small fixed-shape response beats completeness.",
  "type": "http",
  "serviceName": "Polymarket Intelligence API",
  "resourceType": "Security",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0x7b13107779CfDA1bEba3289d0Fbe27310436f3E3",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "50000",
      "amountUsd": 0.05,
      "maxTimeoutSeconds": 300
    }
  ],
  "outputSchema": {
    "properties": {
      "example": {
        "additionalProperties": false,
        "properties": {
          "asOf": {
            "format": "date-time",
            "type": "string"
          },
          "caveats": {
            "items": {
              "type": "string"
            },
            "type": "array"
          },
          "decomposed": {
            "minimum": 0,
            "type": "integer"
          },
          "markets": {
            "items": {
              "additionalProperties": false,
              "properties": {
                "apparentVolumeUsd": {
                  "description": "Observed taker-side volume in the materialized window, in USD.",
                  "minimum": 0,
                  "type": "number"
                },
                "apparentVsBookFlag": {
                  "description": "Whether observed volume is structurally inconsistent with available book liquidity.",
                  "type": [
                    "boolean",
                    "null"
                  ]
                },
                "bucket": {
                  "description": "Descriptive taker-flow structure bucket, not a fraud verdict.",
                  "enum": [
                    "unranked",
                    "structurally-thin",
                    "concentrated",
                    "moderate",
                    "broad"
                  ],
                  "type": "string"
                },
                "conditionId": {
                  "description": "Polymarket condition ID.",
                  "pattern": "^0x[0-9a-fA-F]{64}$",
                  "type": "string"
                },
                "effectiveTraders": {
                  "description": "HHI-derived effective trader count for the observed taker flow.",
                  "minimum": 0,
                  "type": "integer"
                },
                "marketClosed": {
                  "description": "Whether the market was closed in the artifact.",
                  "type": [
                    "boolean",
                    "null"
                  ]
                },
                "resolution": {
                  "additionalProperties": false,
                  "properties": {
                    "category": {
                      "description": "Heuristic category inferred from the market title.",
                      "type": "string"
                    },
                    "categoryDisputeRatePct": {
                      "maximum": 100,
                      "minimum": 0,
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "categoryFlipRatePct": {
                      "maximum": 100,
                      "minimum": 0,
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "titleLooksUncheckable": {
                      "description": "True when the market TITLE states no checkable threshold (price, number, score, head-to-head). Read from the title only — the resolution rules are not read.",
                      "type": "boolean"
                    }
                  },
                  "required": [
                    "category",
                    "categoryDisputeRatePct",
                    "categoryFlipRatePct",
                    "titleLooksUncheckable"
                  ],
                  "type": [
                    "object",
                    "null"
                  ]
                },
                "title": {
                  "description": "Observed Polymarket market title.",
                  "type": "string"
                },
                "topTraderShare": {
                  "description": "Share of observed taker volume attributed to the top trader.",
                  "maximum": 1,
                  "minimum": 0,
                  "type": "number"
                }
              },
              "required": [
                "conditionId",
                "title",
                "bucket",
                "apparentVolumeUsd",
                "topTraderShare",
                "effectiveTraders",
                "apparentVsBookFlag",
                "marketClosed",
                "resolution"
              ],
              "type": "object"
            },
            "type": "array"
          },
          "observedMarkets": {
            "minimum": 0,
            "type": "integer"
          },
          "windowHours": {
            "minimum": 0,
            "type": "number"
          }
        },
        "required": [
          "asOf",
          "windowHours",
          "observedMarkets",
          "decomposed",
          "markets",
          "caveats"
        ],
        "type": "object"
      },
      "type": {
        "type": "string"
      }
    },
    "required": [
      "type"
    ],
    "type": "object"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "method": "GET",
          "queryParams": {
            "top": 20
          },
          "type": "http"
        },
        "output": {
          "example": {
            "asOf": "2026-09-01T03:42:26.765Z",
            "caveats": [
              "SHOWCASE, NOT THE PAID RESPONSE: what you see is one ranked row of the screener. markets is cut to 1 of the 8 rows this response carried. Nothing is masked or invented: every value is a dated measurement, kept so you can read the shape, the units and the field semantics. The schema published beside it is complete; a paid call returns the complete set.",
              "STATIC CONTRACT SAMPLE: what GET /screener?top=8 returns for the free public snapshot of 2026-09-01T03:42Z, restricted to the markets the seller's own flag reported open, then frozen. It is not current market intelligence: a live response carries its own asOf and current values, and GET /coverage is free and reports how many markets are decomposed right now.",
              "Descriptive FACT for the observed window. Never an accusation of fraud, nor a wash or skill label.",
              "apparentVolumeUsd counts executed trades, which is not the same as liquidity or open interest. It is taker-side and window-scoped, not lifetime.",
              "Concentration is measured among the OBSERVED TAKERS (the tape is taker-only). effectiveTraders = 1/HHI, which exposes what distinctTraders hides.",
              "onchainCounterparties is how many distinct counterparties the dominant taker traded against: a FACT, not a wash verdict. The proxy wallet is not the owner, and the graph is one hop deep.",
              "betResolvedInFavor means the dominant direction coincided with the resolution. One sample; neither PnL nor evidence of skill.",
              "resolutionRisk is the category BASE RATE, not a forecast for this market: dispute (how often markets like this are disputed at UMA) by flip (when disputed, how often the outcome REVERSES). On-chain fact; a small cell is directional only."
            ],
            "decomposed": 93,
            "markets": [
              {
                "apparentVolumeUsd": 287740.83,
                "apparentVsBookFlag": null,
                "bucket": "broad",
                "conditionId": "0xeef04a24987593cf21397c2ee92b8e82a58d43e2e5f7dde9bd3ebddda8377dbf",
                "effectiveTraders": 11,
                "marketClosed": false,
                "resolution": {
                  "category": "Sports",
                  "categoryDisputeRatePct": 0.4,
                  "categoryFlipRatePct": 31.9,
                  "titleLooksUncheckable": false
                },
                "title": "Monterrey Open: Diane Parry vs Elise Mertens",
                "topTraderShare": 0.2214
              }
            ],
            "observedMarkets": 42605,
            "windowHours": 71.95
          },
          "type": "json"
        }
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "method": {
                "enum": [
                  "GET"
                ],
                "type": "string"
              },
              "queryParams": {
                "additionalProperties": false,
                "properties": {
                  "top": {
                    "default": 20,
                    "maximum": 40,
                    "minimum": 1,
                    "type": "integer"
                  }
                },
                "type": "object"
              },
              "type": {
                "const": "http",
                "type": "string"
              }
            },
            "required": [
              "type",
              "method"
            ],
            "type": "object"
          },
          "output": {
            "properties": {
              "example": {
                "additionalProperties": false,
                "properties": {
                  "asOf": {
                    "format": "date-time",
                    "type": "string"
                  },
                  "caveats": {
                    "items": {
                      "type": "string"
                    },
                    "type": "array"
                  },
                  "decomposed": {
                    "minimum": 0,
                    "type": "integer"
                  },
                  "markets": {
                    "items": {
                      "additionalProperties": false,
                      "properties": {
                        "apparentVolumeUsd": {
                          "description": "Observed taker-side volume in the materialized window, in USD.",
                          "minimum": 0,
                          "type": "number"
                        },
                        "apparentVsBookFlag": {
                          "description": "Whether observed volume is structurally inconsistent with available book liquidity.",
                          "type": [
                            "boolean",
                            "null"
                          ]
                        },
                        "bucket": {
                          "description": "Descriptive taker-flow structure bucket, not a fraud verdict.",
                          "enum": [
                            "unranked",
                            "structurally-thin",
                            "concentrated",
                            "moderate",
                            "broad"
                          ],
                          "type": "string"
                        },
                        "conditionId": {
                          "description": "Polymarket condition ID.",
                          "pattern": "^0x[0-9a-fA-F]{64}$",
                          "type": "string"
                        },
                        "effectiveTraders": {
                          "description": "HHI-derived effective trader count for the observed taker flow.",
                          "minimum": 0,
                          "type": "integer"
                        },
                        "marketClosed": {
                          "description": "Whether the market was closed in the artifact.",
                          "type": [
                            "boolean",
                            "null"
                          ]
                        },
                        "resolution": {
                          "additionalProperties": false,
                          "properties": {
                            "category": {
                              "description": "Heuristic category inferred from the market title.",
                              "type": "string"
                            },
                            "categoryDisputeRatePct": {
                              "maximum": 100,
                              "minimum": 0,
                              "type": [
                                "number",
                                "null"
                              ]
                            },
                            "categoryFlipRatePct": {
                              "maximum": 100,
                              "minimum": 0,
                              "type": [
                                "number",
                                "null"
                              ]
                            },
                            "titleLooksUncheckable": {
                              "description": "True when the market TITLE states no checkable threshold (price, number, score, head-to-head). Read from the title only — the resolution rules are not read.",
                              "type": "boolean"
                            }
                          },
                          "required": [
                            "category",
                            "categoryDisputeRatePct",
                            "categoryFlipRatePct",
                            "titleLooksUncheckable"
                          ],
                          "type": [
                            "object",
                            "null"
                          ]
                        },
                        "title": {
                          "description": "Observed Polymarket market title.",
                          "type": "string"
                        },
                        "topTraderShare": {
                          "description": "Share of observed taker volume attributed to the top trader.",
                          "maximum": 1,
                          "minimum": 0,
                          "type": "number"
                        }
                      },
                      "required": [
                        "conditionId",
                        "title",
                        "bucket",
                        "apparentVolumeUsd",
                        "topTraderShare",
                        "effectiveTraders",
                        "apparentVsBookFlag",
                        "marketClosed",
                        "resolution"
                      ],
                      "type": "object"
                    },
                    "type": "array"
                  },
                  "observedMarkets": {
                    "minimum": 0,
                    "type": "integer"
                  },
                  "windowHours": {
                    "minimum": 0,
                    "type": "number"
                  }
                },
                "required": [
                  "asOf",
                  "windowHours",
                  "observedMarkets",
                  "decomposed",
                  "markets",
                  "caveats"
                ],
                "type": "object"
              },
              "type": {
                "type": "string"
              }
            },
            "required": [
              "type"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    }
  },
  "tags": [
    "polymarket",
    "prediction-markets",
    "screener",
    "order-flow",
    "base",
    "bazaar"
  ],
  "sourceHost": "api.polym.uk",
  "lastUpdated": "2026-10-07T03:40:19.544Z",
  "quality": {
    "calls30d": 4,
    "uniquePayers30d": 1,
    "lastCalledAt": "2026-10-07T03:40:18.389Z"
  },
  "metadata": {
    "serviceName": "Polymarket Intelligence API",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "top": 20
            },
            "type": "http"
          },
          "output": {
            "example": {
              "asOf": "2026-09-01T03:42:26.765Z",
              "caveats": [
                "SHOWCASE, NOT THE PAID RESPONSE: what you see is one ranked row of the screener. markets is cut to 1 of the 8 rows this response carried. Nothing is masked or invented: every value is a dated measurement, kept so you can read the shape, the units and the field semantics. The schema published beside it is complete; a paid call returns the complete set.",
                "STATIC CONTRACT SAMPLE: what GET /screener?top=8 returns for the free public snapshot of 2026-09-01T03:42Z, restricted to the markets the seller's own flag reported open, then frozen. It is not current market intelligence: a live response carries its own asOf and current values, and GET /coverage is free and reports how many markets are decomposed right now.",
                "Descriptive FACT for the observed window. Never an accusation of fraud, nor a wash or skill label.",
                "apparentVolumeUsd counts executed trades, which is not the same as liquidity or open interest. It is taker-side and window-scoped, not lifetime.",
                "Concentration is measured among the OBSERVED TAKERS (the tape is taker-only). effectiveTraders = 1/HHI, which exposes what distinctTraders hides.",
                "onchainCounterparties is how many distinct counterparties the dominant taker traded against: a FACT, not a wash verdict. The proxy wallet is not the owner, and the graph is one hop deep.",
                "betResolvedInFavor means the dominant direction coincided with the resolution. One sample; neither PnL nor evidence of skill.",
                "resolutionRisk is the category BASE RATE, not a forecast for this market: dispute (how often markets like this are disputed at UMA) by flip (when disputed, how often the outcome REVERSES). On-chain fact; a small cell is directional only."
              ],
              "decomposed": 93,
              "markets": [
                {
                  "apparentVolumeUsd": 287740.83,
                  "apparentVsBookFlag": null,
                  "bucket": "broad",
                  "conditionId": "0xeef04a24987593cf21397c2ee92b8e82a58d43e2e5f7dde9bd3ebddda8377dbf",
                  "effectiveTraders": 11,
                  "marketClosed": false,
                  "resolution": {
                    "category": "Sports",
                    "categoryDisputeRatePct": 0.4,
                    "categoryFlipRatePct": 31.9,
                    "titleLooksUncheckable": false
                  },
                  "title": "Monterrey Open: Diane Parry vs Elise Mertens",
                  "topTraderShare": 0.2214
                }
              ],
              "observedMarkets": 42605,
              "windowHours": 71.95
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "additionalProperties": false,
                  "properties": {
                    "top": {
                      "default": 20,
                      "maximum": 40,
                      "minimum": 1,
                      "type": "integer"
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "additionalProperties": false,
                  "properties": {
                    "asOf": {
                      "format": "date-time",
                      "type": "string"
                    },
                    "caveats": {
                      "items": {
                        "type": "string"
                      },
                      "type": "array"
                    },
                    "decomposed": {
                      "minimum": 0,
                      "type": "integer"
                    },
                    "markets": {
                      "items": {
                        "additionalProperties": false,
                        "properties": {
                          "apparentVolumeUsd": {
                            "description": "Observed taker-side volume in the materialized window, in USD.",
                            "minimum": 0,
                            "type": "number"
                          },
                          "apparentVsBookFlag": {
                            "description": "Whether observed volume is structurally inconsistent with available book liquidity.",
                            "type": [
                              "boolean",
                              "null"
                            ]
                          },
                          "bucket": {
                            "description": "Descriptive taker-flow structure bucket, not a fraud verdict.",
                            "enum": [
                              "unranked",
                              "structurally-thin",
                              "concentrated",
                              "moderate",
                              "broad"
                            ],
                            "type": "string"
                          },
                          "conditionId": {
                            "description": "Polymarket condition ID.",
                            "pattern": "^0x[0-9a-fA-F]{64}$",
                            "type": "string"
                          },
                          "effectiveTraders": {
                            "description": "HHI-derived effective trader count for the observed taker flow.",
                            "minimum": 0,
                            "type": "integer"
                          },
                          "marketClosed": {
                            "description": "Whether the market was closed in the artifact.",
                            "type": [
                              "boolean",
                              "null"
                            ]
                          },
                          "resolution": {
                            "additionalProperties": false,
                            "properties": {
                              "category": {
                                "description": "Heuristic category inferred from the market title.",
                                "type": "string"
                              },
                              "categoryDisputeRatePct": {
                                "maximum": 100,
                                "minimum": 0,
                                "type": [
                                  "number",
                                  "null"
                                ]
                              },
                              "categoryFlipRatePct": {
                                "maximum": 100,
                                "minimum": 0,
                                "type": [
                                  "number",
                                  "null"
                                ]
                              },
                              "titleLooksUncheckable": {
                                "description": "True when the market TITLE states no checkable threshold (price, number, score, head-to-head). Read from the title only — the resolution rules are not read.",
                                "type": "boolean"
                              }
                            },
                            "required": [
                              "category",
                              "categoryDisputeRatePct",
                              "categoryFlipRatePct",
                              "titleLooksUncheckable"
                            ],
                            "type": [
                              "object",
                              "null"
                            ]
                          },
                          "title": {
                            "description": "Observed Polymarket market title.",
                            "type": "string"
                          },
                          "topTraderShare": {
                            "description": "Share of observed taker volume attributed to the top trader.",
                            "maximum": 1,
                            "minimum": 0,
                            "type": "number"
                          }
                        },
                        "required": [
                          "conditionId",
                          "title",
                          "bucket",
                          "apparentVolumeUsd",
                          "topTraderShare",
                          "effectiveTraders",
                          "apparentVsBookFlag",
                          "marketClosed",
                          "resolution"
                        ],
                        "type": "object"
                      },
                      "type": "array"
                    },
                    "observedMarkets": {
                      "minimum": 0,
                      "type": "integer"
                    },
                    "windowHours": {
                      "minimum": 0,
                      "type": "number"
                    }
                  },
                  "required": [
                    "asOf",
                    "windowHours",
                    "observedMarkets",
                    "decomposed",
                    "markets",
                    "caveats"
                  ],
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    }
  },
  "liveness": {
    "reliability": null
  },
  "verified": false,
  "featured": false,
  "provider": {
    "host": "api.polym.uk",
    "manifest_name": "api.polym.uk",
    "source": "cdp-mirror",
    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-10-14T01:15:01.050Z"
  },
  "exampleResponse": {
    "example": {
      "asOf": "2026-01-01T00:00:00Z",
      "caveats": [
        "string"
      ],
      "decomposed": 0,
      "markets": [
        {
          "apparentVolumeUsd": 0,
          "apparentVsBookFlag": true,
          "bucket": "unranked",
          "conditionId": "string",
          "effectiveTraders": 0,
          "marketClosed": true,
          "resolution": {
            "category": "string",
            "categoryDisputeRatePct": 0,
            "categoryFlipRatePct": 0,
            "titleLooksUncheckable": true
          },
          "title": "string",
          "topTraderShare": 0
        }
      ],
      "observedMarkets": 0,
      "windowHours": 0
    },
    "type": "string"
  }
}