Roundhouse AI

kristo-intelligence-api.onrender.com

DeFi market intelligence API for AI agents. No API keys — the HTTP 402 response IS the checkout. Paid per call, from $0.003/call (USDC on Base), retry, get data.

InferenceLiveeip155:8453Exactvia cdp
https://kristo-intelligence-api.onrender.com/api/v1/signal
Calls · 30d
4↑ 12%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 32 snapshots so far.
$0.04
Verified settled volume
13 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0030
Listed price
As published in the catalog. Always read the live 402 before paying.
4
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-09-14 19:57Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xd4cdA900839C0FED4374EE37EA0DBE8e4c6fd08f

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

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.

{
  "error": "payment_required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xd4cdA900839C0FED4374EE37EA0DBE8e4c6fd08f",
      "amount": "3000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 60
    }
  ],
  "message": "Payment required. Send 0.003 USDC on Base to 0xd4cdA900839C0FED4374EE37EA0DBE8e4c6fd08f to unlock this endpoint.",
  "payment": {
    "chain": "base",
    "network": "base",
    "chain_id": 8453,
    "currency": "USDC",
    "amount_usdc": 0.003,
    "token_contract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "receiver_address": "0xd4cdA900839C0FED4374EE37EA0DBE8e4c6fd08f"
  },
  "endpoint": "/api/v1/signal",
  "resource": {
    "url": "https://kristo-intelligence-api.onrender.com/api/v1/signal",
    "mimeType": "application/json",
    "description": "Kristo Intelligence - paid API data (/api/v1/signal)"
  },
  "accepts[]": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xd4cdA900839C0FED4374EE37EA0DBE8e4c6fd08f",
      "amount": "3000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 60
    }
  ],
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET"
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "type": "object",
            "properties": {
              "queryParams": {
                "type": "object",
                "properties": {}
              }
            }
          },
          "output": {
            "type": "object",
            "properties": {
              "example": {
                "type": "object",
                "description": "Paid JSON response payload"
              }
            }
          }
        }
      }
    }
  },
  "x402_token": "USDC",
  "x402Version": 2,
  "x402_amount": "0.003",
  "instructions": "Send exactly 0.003 USDC (Base network) to 0xd4cdA900839C0FED4374EE37EA0DBE8e4c6fd08f. After payment is confirmed on-chain, retry this endpoint.",
  "x402_accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xd4cdA900839C0FED4374EE37EA0DBE8e4c6fd08f",
      "amount": "3000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 60
    }
  ],
  "x402_network": "base-mainnet",
  "x402_version": "2.0",
  "payment_proof": {
    "retry": "After your USDC transfer is confirmed on Base, retry this endpoint with the X-Payment-Proof header to gain access.",
    "format": "base64url(JSON({payer, transaction_hash, amount_usdc}))",
    "header": "X-Payment-Proof"
  },
  "x402_chain_id": 8453,
  "x402_recipient": "0xd4cdA900839C0FED4374EE37EA0DBE8e4c6fd08f",
  "free_tier_limit": 0,
  "x402_token_contract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "x402_retry_instructions": "STANDARD x402 clients: sign the challenge below (EIP-3009 / exact scheme) and repeat this request with the base64url payload in the 'PAYMENT-SIGNATURE' header — settlement runs through the x402 facilitator automatically and the call returns 200 with data. MANUAL fallback: send the amount in USDC on Base to x402_recipient, then repeat this request with header 'X-Payment-Proof: base64url(JSON({payer, transaction_hash, amount_usdc}))'."
}

Accepts

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

0.003USDC≈ $0.003 USD
on Base · exact scheme

Pay 0.003 USDC on Base to 0xd4cd…fd08f. The signed payment is good for 1 minute.

Paid to
0xd4cd…fd08f
USD Coin contract
0x8335…02913
Payment window
1 minute
As published
3000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xd4cdA900839C0FED4374EE37EA0DBE8e4c6fd08f",
    "amount": "3000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 60
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET"
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "type": "object",
          "properties": {
            "queryParams": {
              "type": "object",
              "properties": {}
            }
          }
        },
        "output": {
          "type": "object",
          "properties": {
            "example": {
              "type": "object",
              "description": "Paid JSON response payload"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-09-14 19:57Z
Last indexed by Roundhouse
2026-09-25 12:20Z
Last enriched (probe, favicon, geo)
2026-09-11 07:46Z
x402 version
2
Max timeout
60s
Liveness probe
HTTP 402
Report

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

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 32 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show the prompt
Using Roundhouse, look up the x402 service kristo-intelligence-api.onrender.com 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=kristo-intelligence-api.onrender.com'
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://kristo-intelligence-api.onrender.com/api/v1/signal, 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.