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K-2SO Agent Negotiation-to-Settlement Binding Procedure
x402
K-2SO Agent Negotiation-to-Settlement Binding Procedure is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status down (last checked 2026-09-15).
Returns a paid AI-generated decision procedure (prose brief) guiding an agent through the full negotiation-to-settlement flow for x402 micropayments on Base.
Price / call$0.002
Success—
StatusDown
How this service works
Paid agent-facing procedure: when an agent negotiates terms (offer, quote id, acceptance, price, deliverable spec, deadline) via an A2A framework or merchant conversation and then pays via x402, this procedure shows how to bind the negotiated terms into the payment context before settling. Output: pre-payment checklist, signed context payload fields (quote id, accepted price, deliverable hash, deadline), verification steps to detect re-pricing after acceptance, and dispute-resolution ordering
Output
A JSON object containing a plain-prose decision procedure (120+ words) describing the full agent negotiation-to-settlement binding process for x402, along with the topic, service slug, generating model name, generation source (llm/reasoning/deterministic), ISO-8601 timestamp, and payment confirmation metadata including payer address and transaction hash.
Example use cases
Implementing x402 settlement in a new agent
“I'm building an autonomous agent that needs to call paid x402 APIs — give me the binding decision procedure for how it should go from receiving an HTTP 402 all the way through settling the USDC payment and retrying.”
Auditing agent payment compliance
“I need to verify my agent is following the correct negotiation-to-settlement procedure for x402 — can you pull the official decision procedure so I can check our implementation against it?”
Onboarding a team to x402 agent payments
“My team is new to x402 micropayments on Base — can you get me the plain-prose decision procedure that explains exactly how an agent should negotiate and settle a payment, so I can share it as a reference guide?”
Technical details
Endpoint
GEThttps://k2so.wrong.systems/api/services/agent-negotiation-to-settlement-binding-procedurWhen to prefer
Choose this endpoint when an agent needs authoritative, LLM-generated prose guidance on the x402 negotiation-to-settlement protocol specifically — particularly when bootstrapping a new agent implementation, auditing compliance, or dynamically fetching the latest binding procedure at runtime rather than hardcoding a static spec. Prefer this over static documentation when the topic can be overridden to specialize the procedure.
Side effects
- HTTP 402 returned if payment has not been settled — agent must pay exact USDC amount and retry with PAYMENT-SIGNATURE header
- Invalid or missing payment signature returns payment verification failure
- Unsupported HTTP method (e.g. POST) returns method-not-allowed error
- topic query param ignored if malformed or too long
- meta=1 returns free metadata JSON without triggering payment — not the full procedure
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"paid": true,
"result": {
"ok": true,
"brief": "plain prose decision procedure (120+ words)",
"model": "deepseek/deepseek-v4-flash-0731",
"topic": "string topic",
"service": "agent-negotiation-to-settlement-binding-procedur",
"procedure": "same as brief",
"generatedAt": "2026-01-01T00:00:00.000Z",
"generationSource": "deterministic"
},
"service": "agent-negotiation-to-settlement-binding-procedur",
"provider": "K-2SO"
}
}Tags
x402
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