Market Data · x402 · early usage

Hourly crypto news-sentiment readings for a ticker (e.g

by crypto-sentiment-x402.onrender.com · discovered, not yet claimed by its owner · updated 2026-10-05

30d calls2

30d payers1

MethodGET

Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

Hourly crypto news-sentiment readings for a ticker (e.g. BTC, ETH), recorded live at the top of every UTC hour and never backfilled. Each row: observed_at, average_compound (-1 to 1), sample_size, Fear & Greed value, matcher and the top 3 headlines behind it (title, link). Query start/end as ISO 8601; default last 7 days, max 30 days per call. See /archive for symbols and coverage.

Tags: bazaar

Call contract

Method: GET
Input: path parameters
Output: json
Last paid call: 2026-10-05

Input example from Bazaar metadata

{
  "symbol": "BTC"
}

Output example

{
  "average_compound_note": "average_compound depends on the row's window column. window \"72h-hl24\" (from 2026-10-04): the recency-weighted score over headlines from the last 72 hours (weight halves every 24 hours), the same number the live API returns; unweighted_compound_72h, effective_sample_size and newest_headline_age_hours are filled in. window null (earlier rows): the plain average over every item the feeds held, however old, and those four columns are null.",
  "count": 2,
  "end": "2026-10-04T02:00:00Z",
  "methodology": "Rows before 2026-10-03 were scored with substring headline matching (matcher null); later rows with whole-word matching (matcher \"whole_word\"). Drivers (the top headlines behind a reading) are stored from 2026-10-03 on; older rows have drivers null. See /validation for the methodology notes.",
  "recording": "Readings are recorded live at the top of every UTC hour and never backfilled. An hour the logger missed stays missing.",
  "rows": [
    {
      "average_compound": 0.1123,
      "drivers": null,
      "effective_sample_size": null,
      "fear_greed_value": 41,
      "matcher": "whole_word",
      "newest_headline_age_hours": null,
      "observed_at": "2026-10-04T00:00:02.513104+00:00",
      "sample_size": 52,
      "unweighted_compound_72h": null,
      "window": null
    },
    {
      "average_compound": 0.1388,
      "drivers": [
        {
          "effect": 0.0221,
          "link": "https://example.com/news/bitcoin-etf-inflows",
          "published": "2026-10-03T22:05:00Z",
          "score": 0.6249,
          "source": "CoinDesk",
          "title": "Bitcoin ETFs log fifth straight day of inflows",
          "weight": 0.8963
        }
      ],
      "effective_sample_size": 31.7,
      "fear_greed_value": 41,
      "matcher": "whole_word",
      "newest_headline_age_hours": 1.2,
      "observed_at": "2026-10-04T01:00:02.209871+00:00",
      "sample_size": 55,
      "unweighted_compound_72h": 0.1012,
      "window": "72h-hl24"
    }
  ],
  "start": "2026-10-04T00:00:00Z",
  "symbol": "BTC"
}

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/39762.json for the price and payment options.
Pay. Call GET https://crypto-sentiment-x402.onrender.com/history/:symbol. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.05 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base
Demand: 2 calls · 1 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.05	0xA6E10884a70D00DE8b8c5dfF0a2a9B1a821cE074	300s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xA6E10884a70D00DE8b8c5dfF0a2a9B1a821cE074",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "50000",
    "amountUsd": 0.05,
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "properties": {
        "average_compound_note": {
          "type": "string"
        },
        "count": {
          "type": "integer"
        },
        "end": {
          "type": "string"
        },
        "methodology": {
          "type": "string"
        },
        "recording": {
          "type": "string"
        },
        "rows": {
          "items": {
            "properties": {
              "average_compound": {
                "type": [
                  "number",
                  "null"
                ]
              },
              "drivers": {
                "anyOf": [
                  {
                    "type": "null"
                  },
                  {
                    "items": {
                      "properties": {
                        "effect": {
                          "type": "number"
                        },
                        "link": {
                          "type": [
                            "string",
                            "null"
                          ]
                        },
                        "published": {
                          "type": [
                            "string",
                            "null"
                          ]
                        },
                        "score": {
                          "type": "number"
                        },
                        "source": {
                          "type": "string"
                        },
                        "title": {
                          "type": "string"
                        },
                        "weight": {
                          "type": "number"
                        }
                      },
                      "required": [
                        "title",
                        "source",
                        "link",
                        "published",
                        "score"
                      ],
                      "type": "object"
                    },
                    "maxItems": 5,
                    "type": "array"
                  }
                ]
              },
              "effective_sample_size": {
                "type": [
                  "number",
                  "null"
                ]
              },
              "fear_greed_value": {
                "type": [
                  "integer",
                  "null"
                ]
              },
              "matcher": {
                "type": [
                  "string",
                  "null"
                ]
              },
              "newest_headline_age_hours": {
                "type": [
                  "number",
                  "null"
                ]
              },
              "observed_at": {
                "type": "string"
              },
              "sample_size": {
                "type": [
                  "integer",
                  "null"
                ]
              },
              "unweighted_compound_72h": {
                "type": [
                  "number",
                  "null"
                ]
              },
              "window": {
                "type": [
                  "string",
                  "null"
                ]
              }
            },
            "required": [
              "observed_at",
              "average_compound",
              "matcher",
              "drivers"
            ],
            "type": "object"
          },
          "type": "array"
        },
        "start": {
          "type": "string"
        },
        "symbol": {
          "type": "string"
        }
      },
      "required": [
        "symbol",
        "start",
        "end",
        "count",
        "rows"
      ],
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

Example shape — generated from the schema, not a captured live response

{
  "example": {
    "average_compound_note": "string",
    "count": 0,
    "end": "string",
    "methodology": "string",
    "recording": "string",
    "rows": [
      {
        "average_compound": 0,
        "drivers": null,
        "effective_sample_size": 0,
        "fear_greed_value": 0,
        "matcher": "string",
        "newest_headline_age_hours": 0,
        "observed_at": "string",
        "sample_size": 0,
        "unweighted_compound_72h": 0,
        "window": "string"
      }
    ],
    "start": "string",
    "symbol": "string"
  },
  "type": "string"
}

Examples

curl

curl -X GET 'https://crypto-sentiment-x402.onrender.com/history/:symbol'
# -> 402 Payment Required; read PAYMENT-REQUIRED
# retry the identical request with PAYMENT-SIGNATURE

JavaScript

const res = await fetch("https://crypto-sentiment-x402.onrender.com/history/:symbol", {
  "method": "GET"
});
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.request("GET", "https://crypto-sentiment-x402.onrender.com/history/:symbol")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: crypto-sentiment-x402.onrender.com
Endpoint: https://crypto-sentiment-x402.onrender.com/history/:symbol
Machine-readable: /resources/39762.json