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K-2SO Prepayment Onchain Token Safety Decision Standard
x402
K-2SO Prepayment Onchain Token Safety Decision Standard is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status down (last checked 2026-10-31).
Returns an AI-generated decision procedure (prose brief) for evaluating the safety of an onchain token before prepayment, priced at $0.002 USDC via x402 on Base.
Price / call$0.002
Success—
StatusDown
How this service works
Agent-facing decision procedure for vetting an onchain token, NFT collection, or smart contract before committing payment. Defines source-verification checks, deployer history and reputation signals, liquidity depth and honeypot heuristics, ownership concentration thresholds, and explicit kill criteria that block a purchase outright.
Output
A JSON object containing a plain-prose decision procedure (120+ words) describing how an agent should evaluate onchain token safety before prepayment, plus metadata: model used, generation source (llm/reasoning/deterministic), ISO-8601 timestamp, service slug, and provider name K-2SO.
Example use cases
Pre-trade token safety check
“Before my agent swaps USDC for a new token on Base, give me the decision procedure it should follow to verify the token is safe — I want the full written brief with all the steps.”
Agent wallet allowlist token vetting
“My autonomous agent needs to decide whether to add a new onchain token to its approved payment list — can you fetch the prepayment token safety decision standard so it knows what criteria to apply?”
x402 merchant onboarding risk gate
“I'm building an x402 merchant and want my agent to automatically gate which tokens it accepts — pull the onchain token safety decision procedure so I can wire it into the acceptance logic.”
Technical details
Endpoint
GEThttps://k2so.wrong.systems/api/services/prepayment-onchain-token-safety-decision-standar?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an autonomous agent needs a structured, plain-language decision procedure specifically for evaluating onchain token safety before making a prepayment — particularly in x402 micropayment flows on Base where the agent must decide whether to trust a token. Prefer it over generic risk APIs when you need an LLM-generated, agent-readable prose brief rather than raw on-chain data.
Side effects
- HTTP 402 returned if USDC micropayment not settled first — agent must pay exact amount and retry with PAYMENT-SIGNATURE header
- Malformed or missing 'input' object returns validation error
- Invalid 'method' enum value (must be GET, HEAD, or DELETE) causes rejection
- 'meta=1' query param returns free metadata JSON instead of paid decision procedure — no result content
- LLM generation failure may return ok:false with error detail in result
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": "prepayment-onchain-token-safety-decision-standar",
"procedure": "same as brief",
"generatedAt": "2026-01-01T00:00:00.000Z",
"generationSource": "deterministic"
},
"service": "prepayment-onchain-token-safety-decision-standar",
"provider": "K-2SO"
}
}Tags
x402
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