Roundhouse

penny402

Every attraction, a quarter-penny. Admission is free. Tiny, instantly-answered attractions for agents. The directory is free; the paid ones are priced in USDC on Base or Solana and quote themselves in the 402.

TradingLiveeip155:8453Exactvia cdp
https://penny402.fun/prophecy
x402FunNoveltyCreativity
Calls · 30d
4↑ 12%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 23 snapshots so far.
$0.10
Verified settled volume
41 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0025
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.
3
Unique payers · 30d
Last called 2026-09-12 16:58Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x9d0bb5dA24cADe855DeE8d1231A1c416e0bB2FFe

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": "POST to buy",
  "quote": {
    "usd": "$0.0025",
    "asset": "USDC on Base or Solana",
    "atomic_usdc": "2500"
  },
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x9d0bb5dA24cADe855DeE8d1231A1c416e0bB2FFe",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://penny402.fun/prophecy",
      "description": "A daily prophecy about the x402 economy for the wallet that paid, drawn from that day's pool and keyed to the paying address: ask twice today and it is identical, ask tomorrow and it is new. The pool is written each night against the real market snapshot from x402stats.io, and those same numbers come back beside the prophecy in `market`, attributed, so you can check it. Novelty and commentary, NOT investment advice: no asset named, no price predicted, nothing to redeem.",
      "outputSchema": {
        "input": {
          "body": {},
          "type": "http",
          "method": "POST",
          "bodyType": "json",
          "description": "a JSON body, up to 4 KB. This attraction takes no parameters — POST {} . Every attraction on penny402 is a flat $0.0025; the unpaid 402 carries those exact terms.",
          "discoverable": true
        },
        "output": {
          "type": "string",
          "example": {
            "date": "2026-09-10",
            "payer": "0x0000000000000000000000000000000000000000",
            "market": {
              "source": "x402stats.io",
              "sellers": 100,
              "volume_usd": 1000,
              "computed_at": "2026-01-01T00:00:00.000Z",
              "top10_share": 0.5,
              "avg_payment_usd": 0.01,
              "organic_sellers": 10
            },
            "mechanic": "drawn from this UTC date's pool, indexed by the `payer` above and stable until midnight UTC. That pool was written the night before against the public x402 market snapshot in `market`, which is returned here with its source so you can check the figures the oracle read. A null `market` means the snapshot could not be read that night and the prophecies are numberless. Commentary, never advice: nothing here is a position.",
            "prophecy": "One or two oracular lines about the x402 economy, drawn for your address and this date."
          },
          "description": "the attraction, as JSON, in the response body"
        }
      },
      "maxAmountRequired": "2500",
      "maxTimeoutSeconds": 60
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb"
      },
      "payTo": "HiQDSev6m8QwangqGFpfHZtKGFRYkAiqi24aF6BFKJrw",
      "scheme": "exact",
      "network": "solana",
      "mimeType": "application/json",
      "resource": "https://penny402.fun/prophecy",
      "description": "A daily prophecy about the x402 economy for the wallet that paid, drawn from that day's pool and keyed to the paying address: ask twice today and it is identical, ask tomorrow and it is new. The pool is written each night against the real market snapshot from x402stats.io, and those same numbers come back beside the prophecy in `market`, attributed, so you can check it. Novelty and commentary, NOT investment advice: no asset named, no price predicted, nothing to redeem.",
      "outputSchema": {
        "input": {
          "body": {},
          "type": "http",
          "method": "POST",
          "bodyType": "json",
          "description": "a JSON body, up to 4 KB. This attraction takes no parameters — POST {} . Every attraction on penny402 is a flat $0.0025; the unpaid 402 carries those exact terms.",
          "discoverable": true
        },
        "output": {
          "type": "string",
          "example": {
            "date": "2026-09-10",
            "payer": "0x0000000000000000000000000000000000000000",
            "market": {
              "source": "x402stats.io",
              "sellers": 100,
              "volume_usd": 1000,
              "computed_at": "2026-01-01T00:00:00.000Z",
              "top10_share": 0.5,
              "avg_payment_usd": 0.01,
              "organic_sellers": 10
            },
            "mechanic": "drawn from this UTC date's pool, indexed by the `payer` above and stable until midnight UTC. That pool was written the night before against the public x402 market snapshot in `market`, which is returned here with its source so you can check the figures the oracle read. A null `market` means the snapshot could not be read that night and the prophecies are numberless. Commentary, never advice: nothing here is a position.",
            "prophecy": "One or two oracular lines about the x402 economy, drawn for your address and this date."
          },
          "description": "the attraction, as JSON, in the response body"
        }
      },
      "maxAmountRequired": "2500",
      "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.

0.0025USDC≈ $0.0025 USD
on Base · exact scheme

Pay 0.0025 USDC on Base to 0x9d0b…B2FFe. The signed payment is good for 1 minute.

Paid to
0x9d0b…B2FFe
USD Coin contract
0x8335…02913
Payment window
1 minute
As published
2500 smallest units
2500units
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
HiQDSe…FKJrw
Token contract
EPjFWd…TDt1v
Payment window
1 minute
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x9d0bb5dA24cADe855DeE8d1231A1c416e0bB2FFe",
    "amount": "2500",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 60
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
    },
    "payTo": "HiQDSev6m8QwangqGFpfHZtKGFRYkAiqi24aF6BFKJrw",
    "amount": "2500",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "maxTimeoutSeconds": 60
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {},
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "text",
        "format": "application/json",
        "example": {
          "date": "2026-09-12",
          "payer": "0x0000000000000000000000000000000000000000",
          "market": {
            "source": "x402stats.io",
            "sellers": 100,
            "volume_usd": 1000,
            "computed_at": "2026-01-01T00:00:00.000Z",
            "top10_share": 0.5,
            "avg_payment_usd": 0.01,
            "organic_sellers": 10
          },
          "mechanic": "drawn from this UTC date's pool, indexed by the `payer` above and stable until midnight UTC. That pool was written the night before against the public x402 market snapshot in `market`, which is returned here with its source so you can check the figures the oracle read. A null `market` means the snapshot could not be read that night and the prophecies are numberless. Commentary, never advice: nothing here is a position.",
          "prophecy": "One or two oracular lines about the x402 economy, drawn for your address and this date."
        }
      }
    },
    "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",
              "description": "a JSON body, up to 4 KB. This attraction takes no parameters — POST {} . Every attraction on penny402 is a flat $0.0025; the unpaid 402 carries those exact terms."
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "type": "string",
              "const": "POST"
            },
            "bodyType": {
              "type": "string",
              "const": "json"
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type",
            "format"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "text"
            },
            "format": {
              "type": "string",
              "const": "application/json",
              "description": "the attraction, as JSON, in the response body"
            },
            "example": {
              "description": "a sample response from the real code path"
            }
          },
          "additionalProperties": false
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-09-12 16:58Z
Last indexed by Roundhouse
2026-09-24 10:40Z
Last enriched (probe, favicon, geo)
2026-09-10 20:15Z
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. 23 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 penny402 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=penny402'
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://penny402.fun/prophecy, 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.