# negotiator402 – Vickrey Auction Bid Optimizer

> negotiator402 – Vickrey Auction Bid Optimizer is a paid API for AI agents from negotiator402.alogos.xyz, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-15).

Computes the optimal bid for a second-price (Vickrey) auction given a bidder's private valuation, opponent valuations, and an optional reserve price, with a deterministic solver-verified result.

## Facts

- Endpoint: POST https://negotiator402.alogos.xyz/v1/bid
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/negotiator402-vickrey-auction-bid-optimizer-e1343625
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_awfm8qYKKEwHCB0Ykqn9E

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability negotiator402-vickrey-auction-bid-optimizer-e1343625 -d '<json body>'
```

Example prompt: I'm in a second-price sealed-bid auction where my private valuation is $450, I think my two opponents' valuations are around $300 and $380, and there's a reserve price of $200 — what's my optimal bid, and can you verify it with a deterministic solver?

## When to prefer this

Choose this endpoint when you need a deterministic, solver-verified optimal bid for a second-price (Vickrey) auction — not an LLM guess. Prefer it over general-purpose LLMs when auditability and the `verified:true` flag matter, or when you need game-theoretically exact results backed by closed-form computation. Also uniquely suited for pay-per-call agent workflows with no subscription required.

## Known failure modes

- Missing required valuation fields returns an error with no bid computed
- Invalid data types (non-numeric valuations) cause a rejection
- Reserve price higher than all valuations may result in no sale outcome
- verified:'refused' returned when inputs are ambiguous or outside solver scope
- Payment failure via x402/MPP results in 402 error and no computation performed

## How this service works

Self-evolving strategic reasoning agent — agent-native, pay-per-call: solve 2-player normal-form games (pure & mixed Nash equilibria), formulate plain-language 2-party negotiations into payoff matrices and solve them, and compute optimal second-price/Vickrey auction bids. Unlike a raw LLM endpoint, every answer carries a `verified` trust flag — `verified:true` means a deterministic solver (nashpy / closed-form) computed and confirmed the result, NOT a language model. The formulator layer self-improves training-free from production traffic: every formulation is logged, solver-verified outcomes become reward signals, and the underlying LoRA model is periodically retrained (SFT + RLVR) on its own verified history. No API key, no subscription — agents pay per request via x402 (Base/USDC) or MPP (Tempo/pathUSD).

## Output

Returns a JSON object with the optimal bid or auction outcome, the mechanism type (e.g. 'vickrey'), a plain-language explanation of the reasoning, the solver used, and a `verified` flag ('true' if a deterministic solver confirmed the result, 'false' if not, 'refused' if computation was not possible).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "reserve": {
   "type": "number",
   "description": "Optional reserve price."
  },
  "opponents": {
   "type": "array",
   "description": "Single-bidder mode: opponents' valuations (or bid estimates)."
  },
  "valuation": {
   "type": "number",
   "description": "Single-bidder mode: your own private valuation."
  },
  "valuations": {
   "type": "array",
   "description": "Full-outcome mode: every bidder's private valuation."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "verified"
 ],
 "properties": {
  "solver": {
   "type": "string"
  },
  "verified": {
   "enum": [
    "true",
    "false",
    "refused"
   ],
   "type": "string"
  },
  "mechanism": {
   "type": "string"
  },
  "explanation": {
   "type": "string"
  }
 },
 "additionalProperties": true
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/negotiator402-vickrey-auction-bid-optimizer-e1343625/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from negotiator402.alogos.xyz](https://www.zero.xyz/host/negotiator402.alogos.xyz/llms.txt)