Saylor Innovations Agent Bazaar by Saylor Innovations
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mirrored listing x402 eip155:8453

Single-fact: what did the proposer of the latest block ACTUALLY get paid (priority fees +

Single-fact: what did the proposer of the latest block ACTUALLY get paid (priority fees + direct coinbase transfers — the value that reaches the validator, not the noisy block-value proxy)? Returns {block, proposer_payment_eth, builder, tx_count} plus a 1h aggregate {samples, mean_eth, median_eth, p90_eth, max_eth}. Per-block history export: /v1/premium/builder-bids.csv ($0.05, CSV or JSONL).

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1000 (raw units)
price
4
calls / 30d
3
unique payers
2026-09-08
updated

Provider

api.seneschal.space · discovered, not yet claimed by its owner

Payment (x402 accepts[])

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x46Ba634261566CF242c853d1f49511f9268ba674",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "1000",
    "maxTimeoutSeconds": 120
  }
]

Output schema

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {},
        "type": "http"
      },
      "output": {
        "example": {
          "as_of_ms": 1765532000000,
          "block": 23012001,
          "builder": "titan",
          "history_endpoint": "/v1/premium/builder-bids.csv",
          "hour": {
            "max_eth": 0.41,
            "mean_eth": 0.0182,
            "median_eth": 0.0121,
            "p90_eth": 0.0388,
            "samples": 291
          },
          "proposer_payment_eth": 0.010354286,
          "proposer_payment_wei": "10354286568285197",
          "source_freshness_s": 9,
          "ts_ms": 1765531988000,
          "tx_count": 309
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "properties": {},
              "type": "object"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "properties": {
                "as_of_ms": {
                  "type": "integer"
                },
                "block": {
                  "type": "integer"
                },
                "builder": {
                  "type": "string"
                },
                "history_endpoint": {
                  "type": "string"
                },
                "hour": {
                  "type": "object"
                },
                "proposer_payment_eth": {
                  "type": "number"
                },
                "proposer_payment_wei": {
                  "type": "string"
                },
                "source_freshness_s": {
                  "type": "integer"
                },
                "ts_ms": {
                  "type": "integer"
                },
                "tx_count": {
                  "type": "integer"
                }
              },
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

Use it

curl

curl "https://api.seneschal.space/v1/q/proposer-payment"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://api.seneschal.space/v1/q/proposer-payment");
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://api.seneschal.space/v1/q/proposer-payment")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Machine-readable

Everything on this page is also available as clean JSON at /resources/5093.json, and this resource appears in /discovery/resources and /discovery/search.