FETCH402
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Resource / 395

healthy

Kronos Crypto Data & Forecasts.

GET https://kronossignals.com/api/v1/gex/btc ↗

Gamma Exposure (GEX) and max-pain options tool for BTC and ETH from the Deribit public API. Returns an aggregate GEX strike ladder (dealer-convention net gamma per strike), gamma flip level (zero-cumulative-GEX strike), spot regime above or below flip, max-pain strikes for upcoming weekly and monthly expiries, an expected-move cone (ATM-IV-derived 1-sigma, front expiry), and a heuristic pin-risk score. 15-minute in-memory cache. $0.04 USDC via x402.

Eligibility
probeable
Failures
0
Last quote
2026-08-13 00:00:02 UTC
Last probe
2026-08-13 00:00:02 UTC
Payment requirements / accepts[] 1 options
State Network Scheme Atomic amount Asset payTo / untrusted
active eip155:8453 exact 40000 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 0x36038e1d712c5e39f35952164ec58ec2b96caee7

All advertised payment options are stored. Base (`eip155:8453`) is the operational network for ranking and canaries; non-Base options remain visible for transparency.

Probe evidence 1 recent
healthy 2026-08-13 00:00:02 UTC GET · HTTP 402 · 77ms · accepts 1 · base 1 ok
Request
GET https://kronossignals.com/api/v1/gex/btc
Robots
error
Note
robots_error:{:robots_http_status, 404};http_402;accepts=1;base=1
Accepts fingerprint
45b3954e4b77c7209d107342aedb2c9323f08efeb1487201b3e51af852ed4fa9

Accepts snapshot

[
  {
    "amount": "40000",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "assetTransferMethod": null,
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "maxTimeoutSeconds": 300,
    "network": "eip155:8453",
    "payTo": "0x36038e1d712c5e39f35952164ec58ec2b96caee7",
    "paymentFlow": null,
    "raw": {
      "amount": "40000",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "maxTimeoutSeconds": 300,
      "max_timeout_seconds": 300,
      "network": "eip155:8453",
      "payTo": "0x36038e1d712c5e39f35952164ec58ec2b96caee7",
      "pay_to": "0x36038e1d712c5e39f35952164ec58ec2b96caee7",
      "scheme": "exact"
    },
    "scheme": "exact"
  }
]

PaymentRequired raw 

{
  "accepts": [
    {
      "amount": "40000",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "maxTimeoutSeconds": 300,
      "network": "eip155:8453",
      "payTo": "0x36038e1d712c5e39f35952164ec58ec2b96caee7",
      "scheme": "exact"
    }
  ],
  "error": "Payment required",
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "method": "GET",
          "pathParams": {},
          "queryParams": {},
          "type": "http"
        },
        "output": {
          "example": {
            "as_of": "2026-07-02T10:00:00.000Z",
            "asset": "BTC-USD",
            "available": true,
            "data_source": "deribit",
            "expected_move": {
              "atm_iv": 42.5,
              "dte": 2.1,
              "expiry": "4JUL26",
              "lower": 60300,
              "spot": 61200,
              "upper": 62100
            },
            "gamma_flip_level": 58500,
            "gex_ladder": [
              {
                "callGex": 18000000,
                "netGex": 12500000,
                "putGex": -5500000,
                "strike": 60000
              }
            ],
            "gex_total": 50000000,
            "gex_units": "USD per 1% spot move per strike",
            "max_pain": [
              {
                "dte": 2.1,
                "expiry": "4JUL26",
                "label": "weekly",
                "max_pain_strike": 60000
              }
            ],
            "pin_risk": [
              {
                "expiry": "4JUL26",
                "max_pain_strike": 60000,
                "note": "Heuristic [0-1]. NOT a forecast.",
                "pin_risk_score": 0.51
              }
            ],
            "spot_regime": "above_flip",
            "underlying_price": 61200
          },
          "type": "json"
        }
      },
      "routeTemplate": ":var1",
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "method": {
                "enum": [
                  "GET"
                ],
                "type": "string"
              },
              "pathParams": {
                "type": "object"
              },
              "queryParams": {
                "properties": {},
                "type": "object"
              },
              "type": {
                "const": "http",
                "type": "string"
              }
            },
            "required": [
              "type",
              "method"
            ],
            "type": "object"
          },
          "output": {
            "properties": {
              "example": {
                "type": "object"
              },
              "type": {
                "type": "string"
              }
            },
            "required": [
              "type"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    }
  },
  "resource": {
    "description": "Gamma Exposure (GEX) and max-pain options tool for BTC and ETH from the Deribit public API. Returns an aggregate GEX strike ladder (dealer-convention net gamma per strike), gamma flip level (zero-cumulative-GEX strike), spot regime above or below flip, max-pain strikes for upcoming weekly and monthly expiries, an expected-move cone (ATM-IV-derived 1-sigma, front expiry), and a heuristic pin-risk score. 15-minute in-memory cache. $0.04 USDC via x402.",
    "mimeType": "application/json",
    "serviceName": "Kronos Crypto Data & Forecasts",
    "tags": [
      "gex",
      "gamma-exposure",
      "max-pain",
      "options",
      "dealer-positioning",
      "expiry",
      "derivatives",
      "crypto",
      "btc",
      "eth",
      "deribit",
      "greeks",
      "gamma-flip",
      "pin-risk",
      "expected-move",
      "ai-agents",
      "x402"
    ],
    "url": "https://kronossignals.com/api/v1/gex/btc"
  },
  "x402Version": 2
}

Response headers

{
  "age": "0",
  "cache-control": "public, max-age=0, must-revalidate",
  "content-type": "application/json",
  "date": "Thu, 13 Aug 2026 00:00:02 GMT",
  "payment-required": "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",
  "server": "Vercel",
  "strict-transport-security": "max-age=63072000",
  "transfer-encoding": "chunked",
  "x-matched-path": "/api/v1/gex/[asset]",
  "x-vercel-cache": "MISS",
  "x-vercel-id": "iad1::iad1::w9gmd-1786579202841-4db5e1f8e06a"
}

Response body 

{
  "accepts": [
    {
      "amount": "40000",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "maxTimeoutSeconds": 300,
      "network": "eip155:8453",
      "payTo": "0x36038e1d712c5e39f35952164ec58ec2b96caee7",
      "scheme": "exact"
    }
  ],
  "error": "Payment required",
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "method": "GET",
          "pathParams": {},
          "queryParams": {},
          "type": "http"
        },
        "output": {
          "example": {
            "as_of": "2026-07-02T10:00:00.000Z",
            "asset": "BTC-USD",
            "available": true,
            "data_source": "deribit",
            "expected_move": {
              "atm_iv": 42.5,
              "dte": 2.1,
              "expiry": "4JUL26",
              "lower": 60300,
              "spot": 61200,
              "upper": 62100
            },
            "gamma_flip_level": 58500,
            "gex_ladder": [
              {
                "callGex": 18000000,
                "netGex": 12500000,
                "putGex": -5500000,
                "strike": 60000
              }
            ],
            "gex_total": 50000000,
            "gex_units": "USD per 1% spot move per strike",
            "max_pain": [
              {
                "dte": 2.1,
                "expiry": "4JUL26",
                "label": "weekly",
                "max_pain_strike": 60000
              }
            ],
            "pin_risk": [
              {
                "expiry": "4JUL26",
                "max_pain_strike": 60000,
                "note": "Heuristic [0-1]. NOT a forecast.",
                "pin_risk_score": 0.51
              }
            ],
            "spot_regime": "above_flip",
            "underlying_price": 61200
          },
          "type": "json"
        }
      },
      "routeTemplate": ":var1",
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "method": {
                "enum": [
                  "GET"
                ],
                "type": "string"
              },
              "pathParams": {
                "type": "object"
              },
              "queryParams": {
                "properties": {},
                "type": "object"
              },
              "type": {
                "const": "http",
                "type": "string"
              }
            },
            "required": [
              "type",
              "method"
            ],
            "type": "object"
          },
          "output": {
            "properties": {
              "example": {
                "type": "object"
              },
              "type": {
                "type": "string"
              }
            },
            "required": [
              "type"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    }
  },
  "resource": {
    "description": "Gamma Exposure (GEX) and max-pain options tool for BTC and ETH from the Deribit public API. Returns an aggregate GEX strike ladder (dealer-convention net gamma per strike), gamma flip level (zero-cumulative-GEX strike), spot regime above or below flip, max-pain strikes for upcoming weekly and monthly expiries, an expected-move cone (ATM-IV-derived 1-sigma, front expiry), and a heuristic pin-risk score. 15-minute in-memory cache. $0.04 USDC via x402.",
    "mimeType": "application/json",
    "serviceName": "Kronos Crypto Data & Forecasts",
    "tags": [
      "gex",
      "gamma-exposure",
      "max-pain",
      "options",
      "dealer-positioning",
      "expiry",
      "derivatives",
      "crypto",
      "btc",
      "eth",
      "deribit",
      "greeks",
      "gamma-flip",
      "pin-risk",
      "expected-move",
      "ai-agents",
      "x402"
    ],
    "url": "https://kronossignals.com/api/v1/gex/btc"
  },
  "x402Version": 2
}

Request headers

{
  "accept": "*/*",
  "user-agent": "Fetch402Bot/0.1 (+https://fetch402.com/crawler; contact: crawler@fetch402.com)"
}

Machine contract

Schemas.

InputJSON
{
  "method": "GET",
  "pathParams": {},
  "queryParams": {},
  "type": "http"
}
OutputJSON
{
  "example": {
    "as_of": "2026-07-02T10:00:00.000Z",
    "asset": "BTC-USD",
    "available": true,
    "data_source": "deribit",
    "expected_move": {
      "atm_iv": 42.5,
      "dte": 2.1,
      "expiry": "4JUL26",
      "lower": 60300,
      "spot": 61200,
      "upper": 62100
    },
    "gamma_flip_level": 58500,
    "gex_ladder": [
      {
        "callGex": 18000000,
        "netGex": 12500000,
        "putGex": -5500000,
        "strike": 60000
      }
    ],
    "gex_total": 50000000,
    "gex_units": "USD per 1% spot move per strike",
    "max_pain": [
      {
        "dte": 2.1,
        "expiry": "4JUL26",
        "label": "weekly",
        "max_pain_strike": 60000
      }
    ],
    "pin_risk": [
      {
        "expiry": "4JUL26",
        "max_pain_strike": 60000,
        "note": "Heuristic [0-1]. NOT a forecast.",
        "pin_risk_score": 0.51
      }
    ],
    "spot_regime": "above_flip",
    "underlying_price": 61200
  },
  "type": "json"
}