Roundhouse

api.seneschal.space

Returns a bid/quote style snapshot for a given builder, percentile, and time window. The response includes the requested parameters plus summary metrics like total slots, samples, and value in ETH.

OtherLiveeip155:8453Exactvia facilitator:dexter
https://api.seneschal.space/v1/q/builder-bid
Calls · 30d
2
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 22 snapshots so far.
$3.46
Verified settled volume
360 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0010
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
Never called
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x46Ba634261566CF242c853d1f49511f9268ba674

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.

{
  "seneschal": {
    "live": {
      "note": "A live taste of the free builder leaderboard — the full board is free; per-builder bid detail + CSV are the paid feeds above.",
      "as_of_ms": 1789658033057,
      "top_builder_24h": {
        "builder": "beaverbuild",
        "share_pct": 48.29,
        "slots_won": 3463
      }
    },
    "note": "402 means this endpoint is priced (x402 / USDC on Base) — not broken. Pay per call: no account, no API key, no signup. Free tiers and discovery below.",
    "discover": {
      "mcp": "https://mcp.seneschal.space",
      "docs": "https://docs.seneschal.space",
      "openapi": "https://api.seneschal.space/openapi.json",
      "agent_directory": "https://seneschal.space/.well-known/agent.gopher"
    },
    "products": [
      {
        "name": "Private Watch",
        "what": "Monero / Zcash view-key payment webhooks — HMAC-signed, no node to run.",
        "start": "https://api.seneschal.space/v1/private/info"
      },
      {
        "name": "Builder data",
        "what": "Per-builder bid distribution + a downloadable CSV of per-slot bids.",
        "start": "https://api.seneschal.space/v1/premium/builder-stats"
      },
      {
        "name": "Penny Oracle",
        "what": "Atomic DeFi / builder facts, a few cents a call, safe in a tight agent loop.",
        "start": "https://api.seneschal.space/v1/q"
      }
    ],
    "board_cta": "Need data we don't list yet? Post a FREE request at https://api.seneschal.space/v1/board/data-requests — boost it with USDC to jump the queue.",
    "free_to_try": {
      "status": "https://api.seneschal.space/v1/status",
      "notice_board": "https://api.seneschal.space/v1/board",
      "at_risk_borrowers": "https://api.seneschal.space/v1/liquidations/atrisk",
      "builder_leaderboard": "https://api.seneschal.space/v1/builders/leaderboard",
      "penny_oracle_catalogue": "https://api.seneschal.space/v1/q"
    }
  }
}

Accepts

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

0.001USDC≈ $0.001 USD
on Base · exact scheme

Pay 0.001 USDC on Base to 0x46Ba…ba674. The signed payment is good for 2 minutes.

Paid to
0x46Ba…ba674
USD Coin contract
0x8335…02913
Payment window
2 minutes
As published
1000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x46Ba634261566CF242c853d1f49511f9268ba674",
    "amount": "1000",
    "scheme": "exact",
    "network": "eip155:8453",
    "resource": "https://api.seneschal.space/v1/q/builder-bid",
    "maxTimeoutSeconds": 120
  }
]

Provenance

Seen in the source catalog
2026-09-23 18:13Z
Last indexed by Roundhouse
2026-09-24 09:15Z
Last enriched (probe, favicon, geo)
2026-09-17 15:15Z
x402 version
2
Max timeout
120s
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. 22 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 api.seneschal.space 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=api.seneschal.space'
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://api.seneschal.space/v1/q/builder-bid, 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.