blockmachine
blockmachine is decentralized, incentivized RPC and archive node infrastructure with public performance data and self-optimizing incentives.
The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"accepts": [],
"resource": {
"url": "https://blockmachine.io/user-management-api/x402/api-keys",
"mimeType": "application/json",
"description": "API key management"
},
"extensions": {
"sign-in-with-x": {
"info": {
"uri": "https://blockmachine.io/user-management-api/x402/api-keys",
"nonce": "21bef9b9848d9c43df11d15251067d29",
"domain": "blockmachine.io",
"version": "1",
"issuedAt": "2026-09-13T02:15:54.598Z",
"statement": "Sign in to view your blockmachine API keys",
"expirationTime": "2026-09-13T02:25:54.598Z"
},
"supportedChains": [
{
"type": "sr25519",
"chainId": "polkadot:2f0555cc76fc2840a25a6ea3b9d68e50"
}
]
}
},
"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.
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 5GVtTR…pZ3qU
- Token contract
- native
- Payment window
- 10 minutes
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 5GVtTR…pZ3qU
- Token contract
- alpha:19
- Payment window
- 10 minutes
Pay 5 USDC on Base to 0x5138…bC14D. The signed payment is good for 10 minutes.
- Paid to
- 0x5138…bC14D
- USD Coin contract
- 0x8335…02913
- Payment window
- 10 minutes
- As published
- 5000000 smallest units
The catalog’s raw entry
[
{
"asset": "native",
"extra": {
"symbol": "TAO",
"decimals": 9,
"settlementModes": [
"direct"
]
},
"payTo": "5GVtTRtmVohXs6ADYhN2tx11Hy882ZpGWQhGeQ7o8dTpZ3qU",
"amount": "25161638",
"scheme": "exact",
"network": "polkadot:2f0555cc76fc2840a25a6ea3b9d68e50",
"maxTimeoutSeconds": 600
},
{
"asset": "alpha:19",
"extra": {
"netuid": 19,
"symbol": "ALPHA",
"decimals": 9,
"settlementModes": [
"direct"
]
},
"payTo": "5GVtTRtmVohXs6ADYhN2tx11Hy882ZpGWQhGeQ7o8dTpZ3qU",
"amount": "2315204970",
"scheme": "exact",
"network": "polkadot:2f0555cc76fc2840a25a6ea3b9d68e50",
"maxTimeoutSeconds": 600
},
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x51388839916bAC32B1c2a14A5D01A6cA079bC14D",
"amount": "5000000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"key_name": "my-agent-key",
"amount_cents": 500
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"payer": "0x... (EVM) or 5... (SS58)",
"api_key": "bm_live_0123456789abcdef0123456789abcdef",
"user_id": "9f6a2b1c-0d34-4e5f-8a9b-1c2d3e4f5a6b",
"key_prefix": "bm_live_0123",
"credited_cu": "500000",
"transaction": "0x... (USDC on Base) or substrate tx hash",
"amount_cents": 500
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"required": [
"amount_cents"
],
"properties": {
"key_name": {
"type": "string",
"description": "Optional label for the minted API key."
},
"amount_cents": {
"type": "integer",
"description": "Purchase amount in USD cents; $5-$50,000 in $5 increments (min 500)."
}
},
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"enum": [
"json"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
},
"category": "data-provider"
},
"sign-in-with-x": {
"info": {
"uri": "https://blockmachine.io/user-management-api/x402/api-keys",
"nonce": "517487c1ce590c3a0898468768ef6b7e",
"domain": "blockmachine.io",
"version": "1",
"issuedAt": "2026-07-01T09:28:33.577Z",
"statement": "Purchase blockmachine API access",
"expirationTime": "2026-07-01T09:38:33.577Z"
},
"supportedChains": [
{
"type": "sr25519",
"chainId": "polkadot:2f0555cc76fc2840a25a6ea3b9d68e50"
}
]
}
}Provenance
- Seen in the source catalog
- 2026-07-01 09:28Z
- Last indexed by Roundhouse
- 2026-07-31 06:10Z
- Last enriched (probe, favicon, geo)
- 2026-09-13 02:15Z
- x402 version
- 2
- Max timeout
- 600s
- Liveness probe
- HTTP 402
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
Nothing indexed for this service or its provider yet. Not a claim that it is unused — only that we hold no record. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service blockmachine and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=blockmachine' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://blockmachine.io/user-management-api/x402/api-keys, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.