Utilities · x402 · early usage

Time-series of alpha-token price for a single Bittensor subnet (window: 1h/24h/7d/30d)

Time-series of alpha-token price for a single Bittensor subnet (window: 1h/24h/7d/30d). Sourced from bittensor_alpha_prices captured every 10 minutes. AI agent API for alpha-token trading signals. Informational research data — not investment advice.

by api.carbon-cashmere.de · discovered, not yet claimed by its owner · updated 2026-10-09

30d calls1

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

Tags: bazaar · eip2612GasSponsoring · erc20ApprovalGasSponsoring · offer-receipt · payment-identifier

Call contract

Method: GET
Input: path parameters
Output: json
Last paid call: 2026-10-09

Input example from Bazaar metadata

{
  "netuid": "1"
}

Output example

{}

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/51657.json for the price and payment options.
Pay. Call GET https://api.carbon-cashmere.de/v1/bittensor-derivatives/alpha-price-history/:netuid. 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, Polygon, Arbitrum One, eip155:480, Solana, algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=, stellar:pubnet, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.02 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base, Polygon, Arbitrum One, eip155:480, Solana, algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=, stellar:pubnet
Demand: 1 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	$0.02	0xf8b2dD46542175AD46e14e6133340E652665F2Ee	300s
exact	Polygon eip155:137	USDC	$0.02	0xf8b2dD46542175AD46e14e6133340E652665F2Ee	300s
exact	Arbitrum One eip155:42161	USDC	$0.02	0xf8b2dD46542175AD46e14e6133340E652665F2Ee	300s
exact	eip155:480 eip155:480	0x79A02482A880bCE3F13e09Da970dC34db4CD24d1	20000	0xf8b2dD46542175AD46e14e6133340E652665F2Ee	300s
exact	Solana solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp	USDC	$0.02	GgS891nMiEETjBEFw1QQxVcAqsRV34mDYpxh24TrpCiD	300s
exact	algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8= algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=	31566704	20000	5GRGZVUNRF2S4BY2TNRBCUCKUOT3H6BP56ACPCZVGR3ISTTRRSSB2RGJGI	300s
exact	stellar:pubnet stellar:pubnet	USDC:GA5ZSEJYB37JRC5AVCIA5MOP4RHTM335X2KGX3IHOJAPP5RE34K4KZVN	200000	GDYFWCUFLG7MZAITOOVITYDNCLVJXWJ7OASYJAJPPOTONUQRNBCRO2VP	300s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "20000",
    "amountUsd": 0.02,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "20000",
    "amountUsd": 0.02,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "20000",
    "amountUsd": 0.02,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:480",
    "payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
    "asset": "0x79A02482A880bCE3F13e09Da970dC34db4CD24d1",
    "amount": "20000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "GgS891nMiEETjBEFw1QQxVcAqsRV34mDYpxh24TrpCiD",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "20000",
    "amountUsd": 0.02,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=",
    "payTo": "5GRGZVUNRF2S4BY2TNRBCUCKUOT3H6BP56ACPCZVGR3ISTTRRSSB2RGJGI",
    "asset": "31566704",
    "amount": "20000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "stellar:pubnet",
    "payTo": "GDYFWCUFLG7MZAITOOVITYDNCLVJXWJ7OASYJAJPPOTONUQRNBCRO2VP",
    "asset": "USDC:GA5ZSEJYB37JRC5AVCIA5MOP4RHTM335X2KGX3IHOJAPP5RE34K4KZVN",
    "amount": "200000",
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

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

{
  "example": {},
  "type": "string"
}

Examples

curl

curl -X GET 'https://api.carbon-cashmere.de/v1/bittensor-derivatives/alpha-price-history/:netuid'
# -> 402 Payment Required; read PAYMENT-REQUIRED
# retry the identical request with PAYMENT-SIGNATURE

JavaScript

const res = await fetch("https://api.carbon-cashmere.de/v1/bittensor-derivatives/alpha-price-history/:netuid", {
  "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://api.carbon-cashmere.de/v1/bittensor-derivatives/alpha-price-history/:netuid")
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: api.carbon-cashmere.de
Endpoint: https://api.carbon-cashmere.de/v1/bittensor-derivatives/alpha-price-history/:netuid
Machine-readable: /resources/51657.json