Beauty & Personal Care · x402 · early usage

chainpeek (Tanod) ETH and BTC OHLCV price candles (5m to 1d) computed from on-chain Uni…

chainpeek (Tanod) ETH and BTC OHLCV price candles (5m to 1d) computed from on-chain Uniswap v3 swaps on Base. Use when an agent needs ETH or BTC price history as OHLCV candles for charting or backtesting.

by tanod.dev · discovered, not yet claimed by its owner · updated 2026-10-12

30d calls2

30d payers2

MethodPOST

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: chainpeek · chain · candles · ens · calldata · bazaar · builder-code · erc20ApprovalGasSponsoring

Call contract

Method: POST
Input: json
Output: json
Last paid call: 2026-10-12

Input example from Bazaar metadata

{
  "interval": "1h",
  "limit": 3,
  "pair": "WETH/USDC"
}

Output example

{
  "as_of": 1791459117,
  "as_of_block": 52334885,
  "as_of_iso": "2026-10-08T11:31:57Z",
  "base": {
    "address": "0x4200000000000000000000000000000000000006",
    "decimals": 18,
    "symbol": "WETH"
  },
  "candles": [
    {
      "close": 2562.440508,
      "high": 2564.536011,
      "low": 2562.420829,
      "open": 2564.53549,
      "swaps": 162,
      "t": 1791450000,
      "volume_base": 283.1768169,
      "volume_quote": 723823.9884
    },
    {
      "close": 2554.931473,
      "high": 2562.444764,
      "low": 2554.931469,
      "open": 2562.440275,
      "swaps": 332,
      "t": 1791453600,
      "volume_base": 978.302039,
      "volume_quote": 2495689.547
    },
    {
      "close": 2533.963891,
      "high": 2554.934474,
      "low": 2533.962543,
      "open": 2554.932156,
      "swaps": 409,
      "t": 1791457200,
      "volume_base": 2643.973295,
      "volume_quote": 6707581.103
    }
  ],
  "chain": "base",
  "count": 3,
  "dex": "uniswap_v3",
  "fee": 3000,
  "interval": "1h",
  "interval_seconds": 3600,
  "last_candle_partial": true,
  "note": "Computed by Tanod from public Uniswap v3 Swap events of one pool on Base: open/high/low/close are the pool's post-swap prices, volumes the absolute swapped amounts. DEX prices can differ from centralized exchanges (fees, arbitrage lag, MEV and sandwich trades inside a block, depegs of the quote stablecoin). A candle without swaps carries the previous close with zero volume; the last candle is still forming. Informational only, not investment advice.",
  "pair": "WETH/USDC",
  "pool": "0x6c561B446416E1A00E8E93E221854d6eA4171372",
  "price_unit": "USDC per WETH",
  "quote": {
    "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "decimals": 6,
    "symbol": "USDC"
  },
  "source": "Uniswap v3 swaps on Base (on-chain)",
  "timestamps": "Bucketed by block timestamp (UTC, interval-aligned): each log's blockTimestamp, else estimated from Base's fixed 2 s block time anchored at the latest block."
}

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/35803.json for the price and payment options.
Pay. Call GET https://tanod.dev/v1/chain/candles. 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, Solana, eip155:56, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.003 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base, Polygon, Solana, eip155:56
Demand: 2 calls · 2 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.003	0x593857A4a4F619543ea12394137C3004ce841720	300s
exact	Polygon eip155:137	USDC	$0.003	0x593857A4a4F619543ea12394137C3004ce841720	300s
exact	Solana solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp	USDC	$0.003	RMk9k3VC8dr4hhjgFh88rGhjAbzfBzHxJJ5n2fTcqus	300s
exact	eip155:56 eip155:56	0x8AC76a51cc950d9822D68b83fE1Ad97B32Cd580d	3000000000000000	0x593857A4a4F619543ea12394137C3004ce841720	300s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x593857A4a4F619543ea12394137C3004ce841720",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "3000",
    "amountUsd": 0.003,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "payTo": "0x593857A4a4F619543ea12394137C3004ce841720",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "3000",
    "amountUsd": 0.003,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "RMk9k3VC8dr4hhjgFh88rGhjAbzfBzHxJJ5n2fTcqus",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "3000",
    "amountUsd": 0.003,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:56",
    "payTo": "0x593857A4a4F619543ea12394137C3004ce841720",
    "asset": "0x8AC76a51cc950d9822D68b83fE1Ad97B32Cd580d",
    "amount": "3000000000000000",
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "properties": {
        "as_of": {
          "type": "integer"
        },
        "as_of_block": {
          "type": "integer"
        },
        "as_of_iso": {
          "type": "string"
        },
        "base": {
          "properties": {
            "address": {
              "type": "string"
            },
            "decimals": {
              "type": "integer"
            },
            "symbol": {
              "type": "string"
            }
          },
          "required": [
            "symbol",
            "address",
            "decimals"
          ],
          "type": "object"
        },
        "candles": {
          "items": {
            "properties": {
              "close": {
                "type": [
                  "number",
                  "null"
                ]
              },
              "high": {
                "type": [
                  "number",
                  "null"
                ]
              },
              "low": {
                "type": [
                  "number",
                  "null"
                ]
              },
              "open": {
                "type": [
                  "number",
                  "null"
                ]
              },
              "swaps": {
                "type": "integer"
              },
              "t": {
                "type": "integer"
              },
              "volume_base": {
                "type": "number"
              },
              "volume_quote": {
                "type": "number"
              }
            },
            "required": [
              "t",
              "open",
              "high",
              "low",
              "close",
              "volume_base",
              "volume_quote",
              "swaps"
            ],
            "type": "object"
          },
          "maxItems": 200,
          "type": "array"
        },
        "chain": {
          "type": "string"
        },
        "count": {
          "type": "integer"
        },
        "dex": {
          "type": "string"
        },
        "fee": {
          "type": "integer"
        },
        "interval": {
          "type": "string"
        },
        "interval_seconds": {
          "type": "integer"
        },
        "last_candle_partial": {
          "type": "boolean"
        },
        "note": {
          "type": "string"
        },
        "pair": {
          "type": "string"
        },
        "pool": {
          "type": "string"
        },
        "price_unit": {
          "type": "string"
        },
        "quote": {
          "properties": {
            "address": {
              "type": "string"
            },
            "decimals": {
              "type": "integer"
            },
            "symbol": {
              "type": "string"
            }
          },
          "required": [
            "symbol",
            "address",
            "decimals"
          ],
          "type": "object"
        },
        "source": {
          "type": "string"
        },
        "timestamps": {
          "type": "string"
        }
      },
      "required": [
        "pair",
        "pool",
        "fee",
        "interval",
        "candles",
        "source",
        "note"
      ],
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

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

{
  "example": {
    "as_of": 0,
    "as_of_block": 0,
    "as_of_iso": "string",
    "base": {
      "address": "string",
      "decimals": 0,
      "symbol": "string"
    },
    "candles": [
      {
        "close": 0,
        "high": 0,
        "low": 0,
        "open": 0,
        "swaps": 0,
        "t": 0,
        "volume_base": 0,
        "volume_quote": 0
      }
    ],
    "chain": "string",
    "count": 0,
    "dex": "string",
    "fee": 0,
    "interval": "string",
    "interval_seconds": 0,
    "last_candle_partial": true,
    "note": "string",
    "pair": "string",
    "pool": "string",
    "price_unit": "string",
    "quote": {
      "address": "string",
      "decimals": 0,
      "symbol": "string"
    },
    "source": "string",
    "timestamps": "string"
  },
  "type": "string"
}

Examples

curl

curl "https://tanod.dev/v1/chain/candles"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://tanod.dev/v1/chain/candles");
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://tanod.dev/v1/chain/candles")
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: tanod.dev
Endpoint: https://tanod.dev/v1/chain/candles
Machine-readable: /resources/35803.json