API · x402

Canonicalize an HTTP request envelope and return a deterministic SHA-256 cache key for…

Canonicalize an HTTP request envelope and return a deterministic SHA-256 cache key for agent and API workflows.

by Bounty Engineer Revenue API · verified provider · updated 2026-10-09

What it does

Canonicalize an HTTP request envelope and return a deterministic SHA-256 cache key for agent and API workflows.

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/21827.json for the price and payment options.
Pay. Call GET https://bounty-engineer-x402-prod.onrender.com/v1/cache-key-plan. 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 the listed asset on Base, Solana, 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, Solana

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	—	—	0xf0c39261192686cdcce529b9919a37863de4c77c	—
exact	Solana solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp	—	—	DkJ3ZSKduPpABsp9MdphS1ssB39MCVHfSKgasbuFaSko	—

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xf0c39261192686cdcce529b9919a37863de4c77c"
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "DkJ3ZSKduPpABsp9MdphS1ssB39MCVHfSKgasbuFaSko"
  }
]

Examples

curl

curl "https://bounty-engineer-x402-prod.onrender.com/v1/cache-key-plan"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://bounty-engineer-x402-prod.onrender.com/v1/cache-key-plan");
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://bounty-engineer-x402-prod.onrender.com/v1/cache-key-plan")
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: Bounty Engineer Revenue API
Endpoint: https://bounty-engineer-x402-prod.onrender.com/v1/cache-key-plan
Machine-readable: /resources/21827.json