Hourly Bittensor subnet registration activity (NeuronRegistered event count per subnet) +
Hourly Bittensor subnet registration activity (NeuronRegistered event count per subnet) + current burn-cost per subnet. Useful for predicting cheap-registration windows.
20000 (raw units)
price
1
calls / 30d
1
unique payers
2026-09-08
updated
Provider
api.carbon-cashmere.de · discovered, not yet claimed by its owner
Payment (x402 accepts[])
[
{
"scheme": "exact",
"network": "eip155:8453",
"payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "20000",
"maxTimeoutSeconds": 300
},
{
"scheme": "exact",
"network": "eip155:137",
"payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"amount": "20000",
"maxTimeoutSeconds": 300
},
{
"scheme": "exact",
"network": "eip155:42161",
"payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"amount": "20000",
"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",
"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
}
]Output schema
{
"bazaar": {
"info": {
"input": {
"method": "GET",
"type": "http"
},
"output": {
"example": {},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"properties": {},
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
},
"eip2612GasSponsoring": {
"info": {
"description": "The facilitator accepts EIP-2612 gasless Permit to Permit2 canonical contract.",
"version": "1"
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"amount": {
"description": "The amount to approve (uint256).",
"pattern": "^[0-9]+$",
"type": "string"
},
"asset": {
"description": "The address of the ERC-20 token contract.",
"pattern": "^0x[a-fA-F0-9]{40}$",
"type": "string"
},
"deadline": {
"description": "The timestamp at which the signature expires.",
"pattern": "^[0-9]+$",
"type": "string"
},
"from": {
"description": "The address of the sender.",
"pattern": "^0x[a-fA-F0-9]{40}$",
"type": "string"
},
"nonce": {
"description": "The current EIP-2612 nonce of the sender.",
"pattern": "^[0-9]+$",
"type": "string"
},
"signature": {
"description": "The 65-byte concatenated signature (r, s, v) as a hex string.",
"pattern": "^0x[a-fA-F0-9]+$",
"type": "string"
},
"spender": {
"description": "The address of the spender (Canonical Permit2).",
"pattern": "^0x[a-fA-F0-9]{40}$",
"type": "string"
},
"version": {
"description": "Schema version identifier.",
"pattern": "^[0-9]+(\\.[0-9]+)*$",
"type": "string"
}
},
"required": [
"from",
"asset",
"spender",
"amount",
"nonce",
"deadline",
"signature",
"version"
],
"type": "object"
}
},
"erc20ApprovalGasSponsoring": {
"info": {
"description": "The facilitator accepts a raw signed approval transaction and will sponsor the gas fees.",
"version": "1"
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"amount": {
"description": "Approval amount (uint256).",
"pattern": "^[0-9]+$",
"type": "string"
},
"asset": {
"description": "The ERC-20 token contract address to approve.",
"pattern": "^0x[a-fA-F0-9]{40}$",
"type": "string"
},
"from": {
"description": "The address of the sender.",
"pattern": "^0x[a-fA-F0-9]{40}$",
"type": "string"
},
"signedTransaction": {
"description": "RLP-encoded signed transaction calling ERC20.approve().",
"pattern": "^0x[a-fA-F0-9]+$",
"type": "string"
},
"spender": {
"description": "The address of the spender (Canonical Permit2).",
"pattern": "^0x[a-fA-F0-9]{40}$",
"type": "string"
},
"version": {
"description": "Schema version identifier.",
"pattern": "^[0-9]+(\\.[0-9]+)*$",
"type": "string"
}
},
"required": [
"from",
"asset",
"spender",
"amount",
"signedTransaction",
"version"
],
"type": "object"
}
},
"offer-receipt": {
"info": {
"offers": [
{
"acceptIndex": 0,
"format": "eip712",
"payload": {
"amount": "20000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"network": "eip155:8453",
"payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
"resourceUrl": "https://api.carbon-cashmere.de/v1/bittensor-derivatives/registration-cost-history",
"scheme": "exact",
"validUntil": 1788859852,
"version": 1
},
"signature": "0x5f6900ef83100c4bb5424c48d29d6e00417f20afdc46911283f94f08cd89a569743d16ccda1bf2632e76546be9b577681d54b695aa2ca0c52fa39744f9e03b461c"
},
{
"acceptIndex": 1,
"format": "eip712",
"payload": {
"amount": "20000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"network": "eip155:137",
"payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
"resourceUrl": "https://api.carbon-cashmere.de/v1/bittensor-derivatives/registration-cost-history",
"scheme": "exact",
"validUntil": 1788859852,
"version": 1
},
"signature": "0x08e30984ecbeb8643bb799e485a5e781ef6fd9b50b7d1f8310163c7cf79d3c622e55d01da26525e7d83fa198662c5bbe046f235e370ce1f9db611d6d5aeaaaab1b"
},
{
"acceptIndex": 2,
"format": "eip712",
"payload": {
"amount": "20000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"network": "eip155:42161",
"payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
"resourceUrl": "https://api.carbon-cashmere.de/v1/bittensor-derivatives/registration-cost-history",
"scheme": "exact",
"validUntil": 1788859852,
"version": 1
},
"signature": "0x830a778aaee4d8b1aea6a5a316bb81bb0c178b45165925494bff67876e360f3a7141f2a65c314457fa126388f83bec1fa0b0d4a1e67699e9596d580fa6b3383b1c"
},
{
"acceptIndex": 3,
"format": "eip712",
"payload": {
"amount": "20000",
"asset": "0x79A02482A880bCE3F13e09Da970dC34db4CD24d1",
"network": "eip155:480",
"payTo": "0xf8b2dD46542175AD46e14e6133340E652665F2Ee",
"resourceUrl": "https://api.carbon-cashmere.de/v1/bittensor-derivatives/registration-cost-history",
"scheme": "exact",
"validUntil": 1788859852,
"version": 1
},
"signature": "0xb629f98539538ba050e2ba6533b2012266364ee5de07a563092c4384660a4cd37a8e19070edb9e0344b22e3b23239f710cf247a8eed980d979432a3ab36550c91b"
},
{
"acceptIndex": 4,
"format": "eip712",
"payload": {
"amount": "20000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "GgS891nMiEETjBEFw1QQxVcAqsRV34mDYpxh24TrpCiD",
"resourceUrl": "https://api.carbon-cashmere.de/v1/bittensor-derivatives/registration-cost-history",
"scheme": "exact",
"validUntil": 1788859852,
"version": 1
},
"signature": "0x06ac85f3e973f2a2f9d0a2816fe15cacf3bdb3ae7cd4d272494aef175c3c99ce52c53caf13d8a3bc9b2774c5ec05f59fb27cde535bc1dc326f13c02c1dc7c70a1c"
},
{
"acceptIndex": 5,
"format": "eip712",
"payload": {
"amount": "20000",
"asset": "31566704",
"network": "algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=",
"payTo": "5GRGZVUNRF2S4BY2TNRBCUCKUOT3H6BP56ACPCZVGR3ISTTRRSSB2RGJGI",
"resourceUrl": "https://api.carbon-cashmere.de/v1/bittensor-derivatives/registration-cost-history",
"scheme": "exact",
"validUntil": 1788859852,
"version": 1
},
"signature": "0x5f1b9f662bc17c234b0919c554cce7cfe70d4e2104b103b3b2158f32a04cc4f95edb8ee951cb9e852d701c9012714825be9a9ca0c8b76cb7c7042217ffe963681c"
},
{
"acceptIndex": 6,
"format": "eip712",
"payload": {
"amount": "200000",
"asset": "USDC:GA5ZSEJYB37JRC5AVCIA5MOP4RHTM335X2KGX3IHOJAPP5RE34K4KZVN",
"network": "stellar:pubnet",
"payTo": "GDYFWCUFLG7MZAITOOVITYDNCLVJXWJ7OASYJAJPPOTONUQRNBCRO2VP",
"resourceUrl": "https://api.carbon-cashmere.de/v1/bittensor-derivatives/registration-cost-history",
"scheme": "exact",
"validUntil": 1788859852,
"version": 1
},
"signature": "0xc9d73d6c3c6fb6d7688450c8b21e64a4fbdf1ca67132bc38770f164d0a1e52814b789185ba377f2bbbcd6ee58d52916b3827255e57de8e54a1a22b5c1b507ead1c"
}
]
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"format": {
"enum": [
"eip712",
"jws"
],
"type": "string"
},
"payload": {
"type": "object"
},
"signature": {
"type": "string"
}
},
"required": [
"format",
"payload",
"signature"
],
"type": "object"
}
},
"payment-identifier": {
"info": {
"required": false
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"id": {
"maxLength": 128,
"minLength": 16,
"pattern": "^[a-zA-Z0-9_-]+$",
"type": "string"
},
"required": {
"type": "boolean"
}
},
"required": [
"required"
],
"type": "object"
}
}
}Use it
curl
curl "https://api.carbon-cashmere.de/v1/bittensor-derivatives/registration-cost-history" # -> 402 Payment Required, accepts[] lists how to pay # retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://api.carbon-cashmere.de/v1/bittensor-derivatives/registration-cost-history");
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.get("https://api.carbon-cashmere.de/v1/bittensor-derivatives/registration-cost-history")
if res.status_code == 402:
accepts = res.json()["accepts"]
# pay one of accepts[] via an x402 client, then retry with the payment headerMachine-readable
Everything on this page is also available as clean JSON at /resources/12576.json, and this resource appears in /discovery/resources and /discovery/search.