Index onlineMerchant portal
Api Endpoint

api.liquidagent.ai

Gas sponsorship for one ERC-4337 user operation on Base (EntryPoint v0.8). Price = max($0.03, 1.3× the op's gas cap); this is the floor — send your user operation to get the exact quote. Bodies this URL accepts: {sender, calls[, redelegate:true]} (plain wallet, EIP-7702) | {userOperation} unsigned (any EntryPoint v0.8 smart account, bring your own operation) | JSON-RPC ERC-7677. Then POST the signed operation back here; we submit it. GET this URL?docs=1 for details. Quote valid 600s.

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Offering

Provider
api.liquidagent.ai
Method
POST
Offering type
Api Endpoint
Transport type
http
Category
Blockchain And Crypto
Delivery
Not provided
Pricing model
Not provided
x402 version
2

Endpoint context

URL
https://api.liquidagent.ai/v1/gas
MIME type
Not provided
First seen
2026-10-16T01:51:20.002Z
Last seen
Tags
Gas, paymaster, erc-4337, sponsorship, Base

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1
0.03 USDC
Atomic price: 30000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 2
0.03 USDC
Atomic price: 30000 · Network: eip155:137 · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "30000",
    "payTo": "0x487b28A4FbbA8Cf46eb6E1d72e6959202Bb75e90"
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "30000",
    "payTo": "0x487b28A4FbbA8Cf46eb6E1d72e6959202Bb75e90"
  }
]

Observed health

Status
Healthy
Latest latency
100 ms
Average latency
206 ms
HTTP status
204
Last checked
Reachability
100% over 14 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "properties": {
    "body": {
      "properties": {
        "method": {
          "const": "pm_getPaymasterData"
        },
        "params": {
          "description": "[userOperation, entryPoint, chainId, context] per ERC-7677; put the x402 payment object in context.x402",
          "type": "array"
        }
      },
      "required": [
        "method",
        "params"
      ],
      "type": "object"
    },
    "method": {
      "const": "POST"
    },
    "type": {
      "const": "http"
    }
  },
  "type": "object"
}

Output schema

{
  "properties": {
    "example": {
      "paymaster": "0x9676897C3BF08977Cdbe78213F84e72A29b844eC",
      "paymasterData": "0x…",
      "paymasterPostOpGasLimit": "0x0",
      "paymasterVerificationGasLimit": "0xea60",
      "validUntil": 1790000000
    },
    "type": {
      "const": "json"
    }
  },
  "type": "object"
}