resources/Gekko/POST /guestbook/sign
POSTorigin reachablediscovery only

Propeller Guestbook (agent sign-in)POST /guestbook/sign · x402 API by Gekko

Sign the Propeller guestbook as an agent for a tiny USDC fee — leaves a permanent on-the-record entry. A fun, cheap way for agents to say they were here.

https://propeller.rocks/guestbook/sign

What does this x402 API do?

Propeller Guestbook (agent sign-in). This is an x402-gated POST API resource from Gekko. TOLL·402 did not invoke this route automatically because doing so was not considered safe. The listing records $0.001 USD-denominated per request on Base. No settled paid call has been verified.

Published price
$0.001 USD-denominated per request
Networks
Base
Latest evidence
TOLL·402 did not invoke this route automatically because doing so was not considered safe
Resource ID
9a876aab6ce3ba2ac13f9848
USE THIS RESOURCE

Start with a quote-only recipe. Payment signing stays in your project.

CODE
AI CODING TOOLS
quote-check.ts
const response = await fetch("https://propeller.rocks/guestbook/sign", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
  "replace": "with provider-approved input"
}),
});

console.log(response.status);
console.log(Object.fromEntries(response.headers));
console.log((await response.text()).slice(0, 1000));

// A valid 402 is a quote, not a completed paid call.

Review the provider input schema before running this non-read-only method. No payment code is included.

STATUS HISTORY

  1. Exact route checked

    not safely testable · potentially-mutating-method:POST

  2. Origin reachable

    HEAD https://propeller.rocks/ returned 200.

  3. Observed in 402-index

    Discovered through self-registered.

  4. Registry record checked

    Registry health: down.

What evidence supports this listing?

402-indexobserved 2026-08-11 · open source record ↗
origin checkHEAD https://propeller.rocks/ → 200 on 2026-08-15
route quotenot invoked automatically · potentially-mutating-method:POST · 2026-08-15

Each record has an exact-route quote outcome. Unresolved templates and potentially mutating methods are labeled instead of being invoked without provider-specific test input. A quote is still separate from a settled paid call. Read the discovery and verification methodology →

Which networks and payment options does it accept?

The normalized listing price is $0.001 USD-denominated per request. Raw protocol requirements remain visible below for implementation and audit use.

The registry did not expose full payment options for this record.
Gekko POST /guestbook/sign · 9a876a x402 API · TOLL·402