x402 List

x402 Protocol Service Directory

OrcaTrace

Data

Polymarket intelligence on x402. Real-time prediction-market signals across 42K markets: quality-gated repricings with order-book microstructure, tracked-whale entries annotated with each wallet's hold-to-resolution calibration (follow/fade), and AI-detected predetermined-outcome markets — one unified, index-polled feed. The whale track record is verifiable and free. Paid endpoints settle per call via x402 (USDC on Base) — no account, no API key.

Pay from $0.01 to $1.00 in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.

UPTIME 24H 100% 7D 100% 30D 100%
BASE URL https://api.orcatrace.dev WEBSITE https://orcatrace.dev ENDPOINTS 6 NETWORK Base ASSET USDC MEMBER SINCE 2026-07-14 MONITORED SINCE 2026-07-14

ASSESSMENT

updated 2h ago

Evidence-backed signals, not a single score. Click any chip for the proof. Measured values stay read-only; unknown is honest.

reliability 100%
uptime 24h
-
uptime 7d
-
uptime 30d
-
uptime 90d
-
response p95
202ms
avg response
202ms
total checks
1
compliance A (11/12)

11 of 12 x402 conformance checks pass. Full checklist below.

jump to compliance checklist

price $0.01 to $1.00 (p63 in Data)
price (min)
$0.01
price (max)
$1.00
category percentile (min)
p63 in Data
category percentile (max)
p95 in Data
endpoints / prices
6 / 6
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.

WHAT IT DOES

ai-derived

OrcaTrace provides Polymarket intelligence signals, including market data, whale tracking, and prediction market insights. conf 90%

category
polymarket-intelligence conf 90%
in
query params
polymarketsprediction-marketswhale-trackingmarket-datasignalsintelligence

AI-generated summary. The measured data is never altered by it.

ENDPOINTS

Service endpoints with HTTP method, path, description, pricing, and network
METHOD PATH DESCRIPTION PRICE NETWORK ASSET
GET /v1/digest $0.10 Base USDC
GET /v1/research $1.00 Base USDC
GET /v1/resolving $0.02 Base USDC
GET /v1/signal $0.01 Base USDC
GET /v1/signals $0.03 Base USDC
GET /v1/whales $0.05 Base USDC
6 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to GET /v1/digest returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.

// request
curl -i 'https://api.orcatrace.dev/v1/digest'
// 402 response (captured by monitor) · 6 payloads · click to expand
[
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xf444abc53f5e1e73caec7df64d147ddb119514a0",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://api.orcatrace.dev/v1/signal",
      "mimeType": "application/json",
      "description": "Paid ($0.01 USDC via x402). One Polymarket feed item: quality-gated mover (vol>=$10k & depth>=$2.5k, +order-book microstructure), whale entry (named whale, with calibration + microstructure), or predetermined signal. Use ?index=N for a specific item, omit for latest. Compute-first / settle-after — you are never charged for an error."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {
              "index": 1
            }
          },
          "output": {
            "type": "json",
            "example": {
              "data": {
                "data": {},
                "type": "mover",
                "title": "Will the next US-Iran meeting be in Switzerland?",
                "createdAt": "2026-07-09T18:40:00.000Z",
                "feedIndex": 1042
              },
              "charged": true,
              "success": true
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "type": "object",
                  "required": [],
                  "properties": {
                    "index": {
                      "type": "integer",
                      "description": "Feed index of the item to fetch. Omit for latest."
                    }
                  }
                }
              },
              "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": "0xf444abc53f5e1e73caec7df64d147ddb119514a0",
        "amount": "30000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://api.orcatrace.dev/v1/signals",
      "mimeType": "application/json",
      "description": "Paid ($0.03 USDC via x402). Batch Polymarket feed items (up to 20): quality-gated movers + order-book microstructure, whale entries with calibration, predetermined signals. Poll GET /v1/index (free), then ?since=N for new items; filter with &type=mover|whale_entry|predetermined. Compute-first / settle-after — you are never charged for an error."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {
              "type": "example",
              "count": 10,
              "since": 1
            }
          },
          "output": {
            "type": "json",
            "example": {
              "data": [
                {
                  "data": {},
                  "type": "mover",
                  "title": "Will the next US-Iran meeting be in Switzerland?",
                  "createdAt": "2026-07-09T18:40:00.000Z",
                  "feedIndex": 1042
                }
              ],
              "count": 1,
              "charged": true,
              "filters": {
                "type": "all",
                "count": 10,
                "since": 1000
              },
              "success": true
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "type": "object",
                  "required": [],
                  "properties": {
                    "type": {
                      "type": "string",
                      "description": "Filter: mover, whale_entry, or predetermined."
                    },
                    "count": {
                      "type": "integer",
                      "maximum": 20,
                      "minimum": 1,
                      "description": "Max items (1-20, default 10)."
                    },
                    "since": {
                      "type": "integer",
                      "description": "Feed index to fetch items after (poll pattern)."
                    }
                  }
                }
              },
              "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": "0xf444abc53f5e1e73caec7df64d147ddb119514a0",
        "amount": "100000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://api.orcatrace.dev/v1/digest",
      "mimeType": "application/json",
      "description": "Paid ($0.10 USDC via x402). Polymarket Intelligence Digest (every 4h): what repriced and why across 42K markets — significant moves, whale positioning interpreted through calibration, predetermined-outcome signals, and international news context. Synthesized analysis, not raw data. Never serves stale: returns 503 if generation falls behind (no charge). Compute-first / settle-after — you are never charged for an error."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {}
          },
          "output": {
            "type": "json",
            "example": {
              "data": {
                "id": "clx0digest123",
                "title": "US-Iran Diplomacy Repricing Drives the Board",
                "summary": "A 50-point repricing on the Switzerland meeting market leads an otherwise quiet day…",
                "createdAt": "2026-07-09T20:00:00.000Z",
                "sourcesUsed": [
                  "polymarket",
                  "news"
                ],
                "fullAnalysis": "## What Moved and Why\n…(400-800 words)…"
              },
              "charged": true,
              "success": true
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "type": "object",
                  "required": [],
                  "properties": {}
                }
              },
              "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": "0xf444abc53f5e1e73caec7df64d147ddb119514a0",
        "amount": "20000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://api.orcatrace.dev/v1/resolving",
      "mimeType": "application/json",
      "description": "Paid ($0.02 USDC via x402). Markets resolving within ?withinHours (1-72): odds, contested-vs-converged, liquidity, and order-book microstructure for the nearest expiries. Mechanical short-interval markets excluded by default (?includeNoise=1 to include). Settle-early with a guaranteed refund — if we charge you but cannot deliver, the payment is refunded."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {
              "withinHours": 24,
              "includeNoise": "example",
              "minLiquidity": 5000
            }
          },
          "output": {
            "type": "json",
            "example": {
              "data": [
                {
                  "yesMid": 0.83,
                  "question": "Will X happen by June 14?",
                  "convergence": "contested",
                  "eventEndDate": "2026-06-14T00:00:00Z",
                  "liquidityUsd": 41000,
                  "hoursRemaining": 22.5
                }
              ],
              "count": 1,
              "filters": {
                "withinHours": 24,
                "includeNoise": false,
                "minLiquidity": 5000
              },
              "success": true
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "type": "object",
                  "required": [],
                  "properties": {
                    "withinHours": {
                      "type": "integer",
                      "maximum": 72,
                      "minimum": 1,
                      "description": "Horizon in hours (1-72)."
                    },
                    "includeNoise": {
                      "type": "string",
                      "description": "Set to 1 to include mechanical short-interval markets."
                    },
                    "minLiquidity": {
                      "type": "number",
                      "minimum": 1000,
                      "description": "Liquidity floor in USD (>=1000)."
                    }
                  }
                }
              },
              "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": "0xf444abc53f5e1e73caec7df64d147ddb119514a0",
        "amount": "50000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://api.orcatrace.dev/v1/whales",
      "mimeType": "application/json",
      "description": "Paid ($0.05 USDC via x402). Whale calibration table: per-wallet hold-to-resolution win rates by odds band, mirror/fade ROI, and follow/fade labels (min 30 resolved entries). The data behind the whale_entry annotations in the signal feed; the free proof is GET /v1/track-record. Settle-early with a guaranteed refund — if we charge you but cannot deliver, the payment is refunded."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {}
          },
          "output": {
            "type": "json",
            "example": {
              "data": {
                "wallets": [
                  {
                    "label": "fade",
                    "wallet": "0x9d84ce0306f8551e02efef1680475fc0f1dc1344",
                    "fadeRoi": 0.209,
                    "winRate": 0.082,
                    "resolved": 912,
                    "pseudonym": "Domer"
                  }
                ]
              },
              "success": true
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "type": "object",
                  "required": [],
                  "properties": {}
                }
              },
              "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": "0xf444abc53f5e1e73caec7df64d147ddb119514a0",
        "amount": "1000000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://api.orcatrace.dev/v1/research",
      "mimeType": "application/json",
      "description": "Paid ($1.00 USDC via x402). Single-market deep-dive: 7-day price action + live order book + tracked-whale positioning with calibration + related international news, synthesized into a thesis with risks and an actionable bottom line. Generated on demand (10-60s); cached 30 minutes. Use ?market=<slug> from polymarket.com/market/<slug> or from our feed items. Settle-early with a guaranteed refund — if we charge you but cannot deliver, the payment is refunded."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {
              "market": "example"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "data": {
                "market": {
                  "slug": "next-us-iran-meeting-switzerland",
                  "question": "Will the next US-Iran meeting be in Switzerland?"
                },
                "analysis": {
                  "risks": [
                    "…"
                  ],
                  "thesis": "…",
                  "whaleView": "…",
                  "bottomLine": "…",
                  "confidence": "medium"
                }
              },
              "cached": false,
              "success": true
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "type": "object",
                  "required": [
                    "market"
                  ],
                  "properties": {
                    "market": {
                      "type": "string",
                      "description": "Polymarket market slug (from polymarket.com/market/<slug>)."
                    }
                  }
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2
  }
]

UPTIME

07-14 · uptime 100.0% · 192ms avg07-1407-14
RESPONSE TIME
07-14 · 192ms avg07-14 · 192ms avg07-1407-14
30d UPTIME 100%
UPTIME 30D 100%
AVG RESP 182ms
TOTAL CHECKS 7

RECENT CHECKS

TIME STATUS RESP
● OK 144ms
● OK 171ms
● OK 191ms
● OK 194ms
● OK 189ms
● OK 184ms
● OK 202ms

OVER TIME

All charts share the 30d window selected here. Every series is also served as JSON at /api/v1/services/orcatrace/price and /api/v1/services/orcatrace/scores.

PRICE (captured 402, USD)
building price history ($0.04)

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

SUB-SCORES (uptime + x402 compliance)
building assessment history (1 day so far)
VOLUME
On-chain settlement volume is a phase 2 signal. Not measured yet, shown here rather than faked.
DISTINCT BUYERS
Distinct on-chain buyers is a phase 2 signal. Not measured yet, shown here rather than faked.

COMPLIANCE

11/12 checks pass · grade A
  • 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
  • response mimeType declared
  • served over HTTPS

EMBED THIS BADGE

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

OrcaTrace listed on x402-list
status
OrcaTrace uptime on x402-list
live uptime
// HTML
<a href="https://x402-list.com/services/orcatrace?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/orcatrace.svg" alt="OrcaTrace listed on x402-list" height="28">
</a>
// Markdown
[![OrcaTrace on x402-list](https://x402-list.com/badge/orcatrace.svg)](https://x402-list.com/services/orcatrace?utm_source=badge&utm_medium=referral&utm_campaign=embed)
// HTML · live uptime variant
<a href="https://x402-list.com/services/orcatrace?utm_source=badge&utm_medium=referral&utm_campaign=embed">
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</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 ]