x402.cambrian.org

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x4c3b0b1cab290300bd5a36ad5f33a607acbd7ac3",
      "amount": "50000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 600
    }
  ],
  "resource": {
    "url": "https://x402.cambrian.org/x402/api/v1/deep42/social-data/sentiment-shifts",
    "mimeType": "application/json",
    "description": "Detect major sentiment shifts in crypto tokens"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET"
        },
        "output": {
          "type": "array"
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "GET",
                  "HEAD",
                  "DELETE"
                ],
                "type": "string"
              },
              "queryParams": {
                "type": "object",
                "properties": {
                  "limit": {
                    "type": "integer",
                    "default": 20,
                    "maximum": 50,
                    "description": "Number of tokens to return"
                  },
                  "comparison_period": {
                    "enum": [
                      "24h",
                      "3d",
                      "7d"
                    ],
                    "type": "string",
                    "default": "3d",
                    "description": "Period to compare against"
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "array",
            "items": {
              "type": "object",
              "properties": {
                "volatility": {
                  "type": "number",
                  "description": "Standard deviation of sentiment scores within the current period. Range 0-5. <1 = strong consensus among authors, >2 = highly divided opinions"
                },
                "tokenSymbol": {
                  "type": "string",
                  "description": "Cryptocurrency token symbol (e.g., BTC, ETH, SOL)"
                },
                "bullishRatio": {
                  "type": "number",
                  "description": "Percentage of current-period tweets with bullish sentiment (score >=6). Range 0-100. >60 = bullish majority, <40 = bearish majority. Calculated from tweets scoring >=6 (bullish) vs <4 (bearish), excluding neutral 4-5"
                },
                "qualityScore": {
                  "type": "number",
                  "description": "Sum of average sentiment + average alpha for current period tweets. Range 0-20. Indicates both directional conviction and content quality. >10 = above-average, >15 = high quality"
                },
                "volumeChange": {
                  "type": "number",
                  "description": "Ratio of current period tweet count to previous period. 1.0 = unchanged, 2.0 = doubled, 0.5 = halved. >1.5 = significant increase in discussion volume"
                },
                "sentimentShift": {
                  "type": "number",
                  "description": "Change in average sentiment between current and previous period. Calculated as currentSentiment - previousSentiment. Range: -10 to +10. Positive = bullish shift, negative = bearish shift. >2 = notable, >5 = major shift"
                },
                "confidenceScore": {
                  "type": "number",
                  "description": "Confidence in the detected shift. Calculated as log(tweet_count + 1) * abs(sentiment_shift). Accounts for both sample size and shift magnitude. Higher = more reliable signal. >3 = moderate confidence, >5 = high confidence"
                },
                "signalMagnitude": {
                  "type": "number",
                  "description": "Shift magnitude normalized by volatility. Calculated as abs(sentiment_shift) / max(volatility, 1). >1 = shift exceeds normal variance, >2 = shift is 2x normal variance. Higher values indicate more statistically meaningful shifts"
                },
                "currentSentiment": {
                  "type": "number",
                  "description": "Average AI-assigned sentiment score across all tweets about this token in the current period (last 24 hours). Range 0-10. Each tweet is independently scored: 0 = very bearish, 5 = neutral, 10 = very bullish. Minimum 3 tweets required"
                },
                "previousSentiment": {
                  "type": "number",
                  "description": "Average AI-assigned sentiment score across all tweets in the previous period (from comparison_period ago to 24h ago). Range 0-10. Minimum 2 tweets required"
                },
                "currentPeriodTweets": {
                  "type": "integer",
                  "description": "Number of tweets about this token in the current period (last 24 hours). Higher counts indicate more active discussion and more reliable sentiment averages"
                },
                "currentPeriodAuthors": {
                  "type": "integer",
                  "description": "Number of distinct authors discussing this token in the current period. Higher counts indicate broader market attention rather than a single voice driving sentiment"
                },
                "previousPeriodTweets": {
                  "type": "integer",
                  "description": "Number of tweets about this token in the previous period. Used as denominator for volumeChange calculation"
                }
              }
            },
            "description": "Direct array of tokens with sentiment shifts (no wrapper)"
          }
        }
      }
    }
  },
  "x402Version": 2
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x4c3b0b1cab290300bd5a36ad5f33a607acbd7ac3",
    "amount": "50000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 600
  }
]

Provenance

Seen in the source catalog

2026-09-14 18:51Z

Last indexed by Roundhouse

2026-09-24 07:45Z

Last enriched (probe, favicon, geo)

2026-09-15 12:16Z

x402 version

2

Max timeout

600s

Liveness probe

HTTP 402