21millionpixels.art

Name: 21millionpixels.art
Price: 0.01 USDC
Availability: InStock

A shared canvas of 21,000,000 pixels. Pick a colour, tap a tile — painting is free. Own a 10×10 plot for $10 and earn half of what the bots pay to paint on it.

OtherLiveeip155:8453Exactvia cdp

https://21millionpixels.art/api/agent/paint-batch

Calls · 30d

21↑ 23%

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 21 snapshots so far.

$43.32

Verified settled volume

2,670 settlements proven x402 by their on-chain EIP-3009 marker.

$0.010

Listed price

As published in the catalog. Always read the live 402 before paying.

Calls · 30d

Upstream's own call count for this endpoint, not ours.

Unique payers · 30d

Last called 2026-09-14 18:43Z

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0xdD666CDCf2BCcff8D1C8161ed24FF26c0ed429b9

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.

{
  "reach": {
    "more": "https://21millionpixels.art/api/reach",
    "days7": 99,
    "today": 1,
    "days30": 99,
    "peakOnlineToday": 3,
    "tilesPaintedThisMonth": 28328
  },
  "detail": "A sample quote for one tile. POST {\"plot\",\"tiles\":[...]} to get the quote for your batch; the amount is tiles × price.",
  "sample": true,
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xdD666CDCf2BCcff8D1C8161ed24FF26c0ed429b9",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://21millionpixels.art/api/agent/paint-batch",
      "description": "Paint up to 100 pixels in one plot on 21millionpixels.art, a shared 21,000,000-pixel canvas, for one payment; the price is tiles x $0.005.",
      "maxAmountRequired": "5000",
      "maxTimeoutSeconds": 60
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP"
      },
      "payTo": "EyktjqCmoUgWGpFfBf5FCGPcXJVdv31MTVN9gcs5rZgP",
      "scheme": "exact",
      "network": "solana",
      "mimeType": "application/json",
      "resource": "https://21millionpixels.art/api/agent/paint-batch",
      "description": "Paint up to 100 pixels in one plot on 21millionpixels.art, a shared 21,000,000-pixel canvas, for one payment; the price is tiles x $0.005.",
      "maxAmountRequired": "5000",
      "maxTimeoutSeconds": 60
    }
  ],
  "x402Version": 1
}

Accepts

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

0.01USDC≈ $0.01 USD

on Base · exact scheme

Pay 0.01 USDC on Base to 0xdD66…429b9. The signed payment is good for 1 minute.

Paid to: 0xdD66…429b9
USD Coin contract: 0x8335…02913
Payment window: 1 minute
As published: 10000 smallest units

10000units

on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme

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: Eyktjq…5rZgP
Token contract: EPjFWd…TDt1v
Payment window: 1 minute

The catalog’s raw entry

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xdD666CDCf2BCcff8D1C8161ed24FF26c0ed429b9",
    "amount": "10000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 60
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
    },
    "payTo": "EyktjqCmoUgWGpFfBf5FCGPcXJVdv31MTVN9gcs5rZgP",
    "amount": "10000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "maxTimeoutSeconds": 60
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "plot": 105250,
          "tiles": [
            {
              "x": 2500,
              "y": 2100,
              "color": 3
            },
            {
              "x": 2501,
              "y": 2100,
              "color": 4
            }
          ],
          "username": "my-agent"
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "ok": true,
          "plot": 105250,
          "payer": "0x857b06519e91e3a54538791bdbb0e22373e36b66",
          "plots": [
            105250
          ],
          "tiles": 2,
          "paidTo": "0xdD666CDCf2BCcff8D1C8161ed24FF26c0ed429b9",
          "painted": 0,
          "pending": 2,
          "settled": true,
          "version": 1234,
          "username": "my-agent",
          "plotOwned": false,
          "transaction": "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef"
        }
      }
    },
    "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": [
                "plot",
                "tiles"
              ],
              "properties": {
                "plot": {
                  "type": "integer",
                  "maximum": 209999,
                  "minimum": 0,
                  "description": "the plot every tile in this batch falls inside; one payment covers one plot"
                },
                "tiles": {
                  "type": "array",
                  "items": {
                    "type": "object",
                    "required": [
                      "x",
                      "y",
                      "color"
                    ],
                    "properties": {
                      "x": {
                        "type": "integer",
                        "maximum": 4999,
                        "minimum": 0,
                        "description": "column, 0 at the left"
                      },
                      "y": {
                        "type": "integer",
                        "maximum": 4199,
                        "minimum": 0,
                        "description": "row, 0 at the top"
                      },
                      "color": {
                        "type": "integer",
                        "maximum": 108,
                        "minimum": 0,
                        "description": "palette index; 1-32 for everyone, 33-108 for wallets that own a plot, 0 clears the tile. GET /api/info lists the hex values and which indices are retired"
                      }
                    }
                  },
                  "maxItems": 100,
                  "minItems": 1,
                  "description": "the pixels to paint, all inside `plot`, each listed once; the price is tiles x the per-pixel price",
                  "uniqueItems": true
                },
                "username": {
                  "type": "string",
                  "pattern": "^[a-z0-9_-]+$",
                  "maxLength": 20,
                  "minLength": 3,
                  "description": "optional; the name this wallet paints under"
                }
              }
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "POST",
                "PUT",
                "PATCH"
              ],
              "type": "string"
            },
            "headers": {
              "type": "object",
              "additionalProperties": {
                "type": "string"
              }
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "additionalProperties": {
                "type": "string"
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog: 2026-09-14 18:43Z
Last indexed by Roundhouse: 2026-09-25 08:50Z
Last enriched (probe, favicon, geo): 2026-09-13 00:45Z
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. 21 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 21millionpixels.art 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=21millionpixels.art'
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://21millionpixels.art/api/agent/paint-batch, 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.