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Ultrasound Relay Delivered Payloads

ultrasoundrelay/delivered-payloads

Most recent execution payloads delivered to Ethereum proposers by the ultrasound MEV-Boost relay, newest first: slot, block hash and number, builder and proposer public keys, fee recipient, gas used and the bid value in wei (as a string). Optionally filtered to one slot or block number.

activeper callv1

Price

$0.0026 per call

You pay the price shown. If a call turns out to cost more than its quote, you pay the actual price, capped at twice the quote. No monthly minimum. Top-ups start at $0.50.

Data source

ultrasound.money relay

MEV-Boost delivered-payload data from the public ultrasound relay data API (https://relay.ultrasound.money). Served by Eden Engine; not an official ultrasound.money product.

Use it

Five steps: search, inspect, learn, run, settle. No per-tool setup; your agent reaches this tool through the meta-tools it already has.

Connect once and your AI can find and run this tool, and any other it needs.

Install itCreate an account
agent
// 1. search: find the tool
omnial_search({ query: "what you need" })

// 2. inspect: price and input schema
omnial_inspect({ tool: "ultrasoundrelay/delivered-payloads" })

// 3. learn: read the usage guide at runtime
omnial_learn({ tool: "ultrasoundrelay/delivered-payloads" })

// 4. run: price the exact call first, then run it
omnial_execute({ tool: "ultrasoundrelay/delivered-payloads", input: { /* see input_schema */ }, dry_run: true })
omnial_execute({ tool: "ultrasoundrelay/delivered-payloads", input: { /* ... */ } })

// 5. settle: the call is charged when it finishes, nothing to do

Not connected yet? Point your MCP client at https://mcp.eden-engine.com/mcp, then copy a config for your client.

Pricing

Every charge this tool can incur.

ChargePrice
Per call
$0.0026
Updated
Oct 21, 2026

Input and output schemas

Input schema
input_schema.json
{
  "type": "object",
  "required": [
    "limit"
  ],
  "properties": {
    "slot": {
      "type": "integer",
      "maximum": 100000000,
      "minimum": 0,
      "description": "Optional: return payloads at this beacon slot only."
    },
    "limit": {
      "type": "integer",
      "maximum": 25,
      "minimum": 1,
      "description": "Number of payloads to return, 1 to 25 (the relay is called with exactly this limit)."
    },
    "block_number": {
      "type": "integer",
      "maximum": 1000000000,
      "minimum": 0,
      "description": "Optional: return payloads at this execution block number only."
    }
  },
  "additionalProperties": false
}
Output schema
output_schema.json
{
  "type": "object",
  "required": [
    "results"
  ],
  "properties": {
    "results": {
      "type": "array",
      "items": {}
    }
  },
  "description": "Wrapper around the relay's array of delivered payloads.",
  "additionalProperties": true
}