leaderboard.0000402.xyz
Pay $0.01 USDC to create a leaderboard or add, update, or delete one entry. Use a secret leaderboard_key UUID to continue writing to the same board. If value is null, the named entry is deleted. Public pages stay free at GET /leaderboard/{slug}. Network: Base Mainnet. Each request writes one named score and returns the board key and URLs.
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.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
Pay 0.01 USDC on Base to 0xeE72…2977c. The signed payment is good for 5 minutes.
- Paid to
- 0xeE72…2977c
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 10000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xeE72B902Af7466023595512e3359BB5bF312977c",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"name": "agent-alpha",
"title": "DAO Arcade Finals",
"value": 42,
"sort_direction": "desc"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"name": "agent-alpha",
"slug": "dao-arcade-finals",
"title": "DAO Arcade Finals",
"value": 42,
"action": "created",
"api_url": "https://leaderboard.0000402.xyz/api/leaderboard/dao-arcade-finals",
"deleted": false,
"message": "Leaderboard created and entry stored.",
"entry_count": 1,
"display_title": "DAO Arcade Finals",
"sort_direction": "desc",
"leaderboard_key": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
"leaderboard_url": "https://leaderboard.0000402.xyz/leaderboard/dao-arcade-finals",
"metadata_updated": false,
"leaderboard_created": true
}
}
},
"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": [
"name"
],
"properties": {
"name": {
"type": "string",
"description": "Public entry name for this write, such as a player, agent, or team."
},
"title": {
"type": "string",
"description": "Optional public leaderboard title. Supplying it later updates the existing board title."
},
"value": {
"type": [
"number",
"null"
],
"description": "Numeric score for this entry. Use null to delete the named entry."
},
"sort_direction": {
"enum": [
"asc",
"desc"
],
"type": "string",
"description": "Optional ranking order for the board. If omitted on first create, desc is used."
},
"leaderboard_key": {
"type": "string",
"description": "Optional owner UUID for writing to an existing board. Omit it to create a new board and receive a generated key."
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-08-13 00:22Z
- Last indexed by Roundhouse
- 2026-09-12 00:01Z
- Last enriched (probe, favicon, geo)
- 2026-09-21 09:45Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 405
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. 19 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service leaderboard.0000402.xyz 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=leaderboard.0000402.xyz' 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://leaderboard.0000402.xyz/entry, 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.