Know what you’re calling.
A catalogue of verified networks, supported methods, limits and endpoint health.
＋ AGENT RPC / PRODUCT PREVIEW
Infrastructure.
On an agent’s terms.
Discover an endpoint. Understand its price. Authorize access. Get a response. A preview of the next interface to STAKR infrastructure.
IN DEVELOPMENTPaid gateway not connected · endpoints and pricing to be confirmed
REQUEST LAB / LOCAL SIMULATIONWalk through
Walk through
a paid request.
See the exchange without a wallet, a payment or a live RPC call.
- 01 Request
- 02 Challenge
- 03 Authorize
- 04 Response
# Local simulation — no network request
# Select a protocol and start the flow.
POST /rpc/evm
{"jsonrpc":"2.0","id":1,
"method":"eth_blockNumber","params":[]}ILLUSTRATIVE DATA · NOT A PAYMENT SDK IMPLEMENTATION
＋ ONE GATEWAY / TWO ADAPTERS
The protocol is a choice.
The access is clear.
MPP and x402 are separate protocols. A client chooses one supported flow and keeps its challenge, authorization and receipt format consistent.
| Exchange | x402 | MPP |
|---|---|---|
| Challenge | PAYMENT-REQUIRED | WWW-Authenticate: Payment |
| Authorization | PAYMENT-SIGNATURE | Authorization: Payment |
| Receipt | PAYMENT-RESPONSE | Payment-Receipt |
| Reference | x402 documentation | MPP documentation |
Set a spending boundary.
Published prices, client-side budgets and a selected payment protocol before executing a request.
Keep the receipt.
Request accounting, payment verification and a clear outcome when an upstream is unavailable.
Building an agent?
Tell us the networks, methods and request volume you need.