API · x402

PAID (from $0.03 USDC per operation): GAS SPONSOR

by api.liquidagent.ai · verified provider · updated 2026-11-08

What it does

PAID (from $0.03 USDC per operation): GAS SPONSOR. One endpoint. Smart-wallet SDKs point at it as an ERC-7677 paymaster (EntryPoint v0.8 on Base; the x402 price rides inside the JSON-RPC response, pay with your usual x402 signature). Plain wallets with USDC but no ETH POST {sender, calls:[{to,data,value?}]}: the 402 is the quote, pay it and the same call returns the sponsored operation + typed data (+ an EIP-7702 authorization if needed); sign and POST it back, we submit and pay the gas. No further charge. Wallet already delegated to another EIP-7702 implementation: add redelegate:true (reversible re-point to Simple7702Account, signed by you). Any EntryPoint v0.8 smart account can instead bring its own operation: POST {userOperation} unsigned for the quote, pay, sign it your account's way, POST it back; we dry-run it and submit it, no bundler.

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/76433.json for the price and payment options.
Pay. Call GET https://api.liquidagent.ai/v1/gas. 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, Polygon, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: see accepts
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base, Polygon

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	—	0x7475e9e0ee7c0d9f1abcaffb74f5f4e195ef3703	120s
exact	Polygon eip155:137	USDC	—	0x7475e9e0ee7c0d9f1abcaffb74f5f4e195ef3703	120s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x7475e9e0ee7c0d9f1abcaffb74f5f4e195ef3703",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "maxTimeoutSeconds": 120
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "payTo": "0x7475e9e0ee7c0d9f1abcaffb74f5f4e195ef3703",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "maxTimeoutSeconds": 120
  }
]

Schemas

Output schema (JSON Schema)

"ERC-7677: {paymaster, paymasterData, paymasterVerificationGasLimit, paymasterPostOpGasLimit, validUntil}. Direct lane: {userOperation, typedData, authorization?, validUntil} then {txHash, userOpHash, success, actualGasCostEth}"

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

null

Examples

curl

curl "https://api.liquidagent.ai/v1/gas"
# -> 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.liquidagent.ai/v1/gas");
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.liquidagent.ai/v1/gas")
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: api.liquidagent.ai
Endpoint: https://api.liquidagent.ai/v1/gas
Machine-readable: /resources/76433.json