MCP Tool · x402 · early usage

Build unsigned transactions to enter any DeFi yield — native/liquid staking (ETH, SOL,…

Build unsigned transactions to enter any DeFi yield — native/liquid staking (ETH, SOL, ATOM), stablecoin lending (USDC/USDT on Aave, Morpho), ERC-4626 vaults, and tokenized RWAs across 80+ networks. Does NOT execute: the caller signs and broadcasts each tx, s…

by mcp.yield.xyz · discovered, not yet claimed by its owner · updated 2026-10-11

30d calls3

30d payers3

MethodPOST

Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

Tags: defi staking · stablecoin yield · lending · vault deposit · unsigned transaction · bazaar

Call contract

Method: POST
Input: json
Output: json
Last paid call: 2026-10-11

Input example from Bazaar metadata

{
  "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
  "amount": "0.1",
  "yieldId": "ethereum-eth-lido-staking"
}

Output example

{
  "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
  "amount": "1",
  "executionPattern": "synchronous",
  "id": "0b8e2c5a-4f3d-4c2b-9e1a-7d6f5e4c3b2a",
  "intent": "enter",
  "status": "CREATED",
  "transactions": [
    {
      "id": "6b757454-725c-4871-9f9a-8fa159dc8720",
      "network": "base",
      "status": "CREATED",
      "stepIndex": 0,
      "title": "APPROVAL Transaction",
      "type": "APPROVAL",
      "unsignedTransaction": "{\"from\":\"0xd8dA…\",\"to\":\"0x8335…\",\"data\":\"0x095e…\"}"
    },
    {
      "id": "da961e24-0f26-462e-9456-3886386ef247",
      "network": "base",
      "status": "CREATED",
      "stepIndex": 1,
      "title": "SUPPLY Transaction",
      "type": "SUPPLY",
      "unsignedTransaction": "{\"from\":\"0xd8dA…\",\"to\":\"0xa238…\",\"data\":\"0x617b…\"}"
    }
  ],
  "type": "STAKE",
  "yieldId": "base-usdc-aave-v3-lending"
}

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/27648.json for the price and payment options.
Pay. Call GET https://mcp.yield.xyz/x402/actions_enter. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.001 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base
Demand: 3 calls · 3 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.001	0xD433f056270912659f073D5FFE7Ae247e39235A5	300s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xD433f056270912659f073D5FFE7Ae247e39235A5",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "1000",
    "amountUsd": 0.001,
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "description": "Core fields shown; responses may carry additional yield-specific fields depending on the protocol (this schema is intentionally non-exhaustive).",
      "properties": {
        "address": {
          "type": "string"
        },
        "amount": {
          "type": [
            "string",
            "null"
          ]
        },
        "createdAt": {
          "type": "string"
        },
        "executionPattern": {
          "enum": [
            "synchronous",
            "asynchronous",
            "batch"
          ],
          "type": "string"
        },
        "id": {
          "description": "Action ID — poll status later with actions_get",
          "type": "string"
        },
        "intent": {
          "description": "\"enter\", \"exit\", or \"manage\"",
          "type": "string"
        },
        "status": {
          "description": "\"CREATED\" on success; poll until SUCCESS/FAILED",
          "type": "string"
        },
        "transactions": {
          "description": "Sign and broadcast each transaction in stepIndex order, then report each hash via submit_hash. NEVER modify unsignedTransaction.",
          "items": {
            "properties": {
              "gasEstimate": {
                "type": "string"
              },
              "id": {
                "type": "string"
              },
              "isMessage": {
                "description": "When true, sign as a message instead of a transaction",
                "type": "boolean"
              },
              "network": {
                "type": "string"
              },
              "status": {
                "type": "string"
              },
              "stepIndex": {
                "type": "integer"
              },
              "title": {
                "type": "string"
              },
              "type": {
                "description": "e.g. \"APPROVAL\", \"SUPPLY\", \"STAKE\"",
                "type": "string"
              },
              "unsignedTransaction": {
                "description": "Raw transaction to sign — a JSON string on EVM chains, an object on non-EVM chains. Never modify it."
              }
            },
            "type": "object"
          },
          "type": "array"
        },
        "type": {
          "description": "Action type, e.g. \"STAKE\", \"UNSTAKE\", \"CLAIM_REWARDS\"",
          "type": "string"
        },
        "yieldId": {
          "type": "string"
        }
      },
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

Example shape — generated from the schema, not a captured live response

{
  "example": {
    "address": "string",
    "amount": "string",
    "createdAt": "string",
    "executionPattern": "synchronous",
    "id": "string",
    "intent": "string",
    "status": "string",
    "transactions": [
      {
        "gasEstimate": "string",
        "id": "string",
        "isMessage": true,
        "network": "string",
        "status": "string",
        "stepIndex": 0,
        "title": "string",
        "type": "string",
        "unsignedTransaction": null
      }
    ],
    "type": "string",
    "yieldId": "string"
  },
  "type": "string"
}

Examples

curl

curl "https://mcp.yield.xyz/x402/actions_enter"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://mcp.yield.xyz/x402/actions_enter");
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://mcp.yield.xyz/x402/actions_enter")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: mcp.yield.xyz
Endpoint: https://mcp.yield.xyz/x402/actions_enter
Machine-readable: /resources/27648.json