https://k2so.wrong.systems/api/services/agent-stack-interop-binding-a2a-negotiation-outcGET /api/services/agent-stack-interop-binding-a2a-negotiation-outc · x402 API by k2so
Deterministic gate for the agent-stack interop seam: verifying that the agent identity that concluded an A2A negotiation (ERC-8004 identity claim, delegation scope, capability offer) is the same identity authorized to settle the outcome via x402. Ordered checks: (1) extract the negotiating party's ERC-8004 identity claim from the A2A outcome, (2) verify the claim's issuer attestation and delegation scope still cover the negotiated deliverable, (3) confirm the x402 settlement payer address
What does this x402 API do?
https://k2so.wrong.systems/api/services/agent-stack-interop-binding-a2a-negotiation-outc. This is an x402-gated GET API resource from k2so. TOLL·402 confirmed a protocol-valid HTTP 402 quote on 2026-08-15. No normalized USD price is recorded; the listing names Base. No settled paid call has been verified.
- Published price
- No normalized USD price is recorded
- Networks
- Base
- Latest evidence
- TOLL·402 confirmed a protocol-valid HTTP 402 quote on 2026-08-15
- Resource ID
- 461487668b08fad9411b3f1c
Start with a quote-only recipe. Payment signing stays in your project.
const response = await fetch("https://k2so.wrong.systems/api/services/agent-stack-interop-binding-a2a-negotiation-outc", {
method: "GET",
});
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.This sends no payment. Inspect the 402 response before adding a wallet-enabled client.
- Live 402 quote confirmed
GET returned a protocol-valid 402 quote (402). No payment was made.
- Origin reachable
HEAD https://k2so.wrong.systems/ returned 200.
- Observed in cdp-bazaar
The registry record was observed and retained with provenance.
- Observed in 402-index
Discovered through bazaar.
- Registry record checked
Registry health: healthy.
What evidence supports this listing?
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 No normalized USD price is recorded. Raw protocol requirements remain visible below for implementation and audit use.