Negotiation Copilot for Agents (SNHP)

{
  "protocolVersion": "0.3.0",
  "name": "Negotiation Copilot for Agents (SNHP)",
  "description": "Get the math-optimal next move in a single-price negotiation, in plain dollars. Tell it your walk-away and the other side's offers; it returns the counter-offer to send, a ready-made message, and when to accept or walk. Validated ~12% better head-to-head (n=20 paired LLM negotiations, 95% CI +6.5-17.4%, p<0.0001). Any counterparty.",
  "url": "https://snhp.dev",
  "version": "0.1.0",
  "defaultInputModes": [
    "application/json"
  ],
  "defaultOutputModes": [
    "application/json"
  ],
  "capabilities": {
    "streaming": false,
    "pushNotifications": false,
    "extensions": [
      {
        "uri": "https://snhp.dev/a2a/negotiation/v1",
        "description": "Advanced: when BOTH agents run SNHP, prove who you both are to unlock a cooperation premium (more joint surplus between verified peers) and a signed, settleable AP2 deal record. Optional \u2014 the core /v1/negotiate/turn tool needs none of this. Follow `flow` in order; full guide: gametheory/server/A2A_FLOW.md.",
        "required": false,
        "flow": [
          {
            "step": 0,
            "do": "register_operator (each side, once)",
            "endpoint": "https://snhp.dev/v1/registry/register_operator",
            "note": "optional domain upgrade: request_domain_challenge -> verify_domain"
          },
          {
            "step": 1,
            "do": "build a peer proof LOCALLY (key never leaves your host)",
            "endpoint": "local / MCP gt_a2a_build_peer_proof"
          },
          {
            "step": 2,
            "do": "exchange proofs with the counterparty",
            "endpoint": "your channel / an A2A message Part"
          },
          {
            "step": 3,
            "do": "open_session with both proofs -> server-derived peer_mode",
            "endpoint": "https://snhp.dev/v1/a2a/open_session"
          },
          {
            "step": 4,
            "do": "next_offer using the session's peer_mode",
            "endpoint": "https://snhp.dev/v1/a2a/next_offer"
          },
          {
            "step": 5,
            "do": "settle -> signed AP2 Cart Mandate",
            "endpoint": "https://snhp.dev/v1/a2a/settle"
          }
        ],
        "params": {
          "register_operator": "https://snhp.dev/v1/registry/register_operator",
          "request_domain_challenge": "https://snhp.dev/v1/registry/request_domain_challenge",
          "verify_domain": "https://snhp.dev/v1/registry/verify_domain",
          "open_session": "https://snhp.dev/v1/a2a/open_session",
          "next_offer": "https://snhp.dev/v1/a2a/next_offer",
          "settle": "https://snhp.dev/v1/a2a/settle",
          "trust_anchor_public_key_pem": "-----BEGIN PUBLIC KEY-----\nMCowBQYDK2VwAyEASSgn80ra0Zszwm1u5u6DogRiMq5NiSkFSI4fKCEpGa4=\n-----END PUBLIC KEY-----\n",
          "settlement_notary_public_key_pem": "-----BEGIN PUBLIC KEY-----\nMCowBQYDK2VwAyEAUiFHHDEC6ZZwQCsqdjyUB00aoutm6to4xtcSffJbER0=\n-----END PUBLIC KEY-----\n"
        }
      }
    ]
  },
  "skills": [
    {
      "id": "negotiate_turn",
      "name": "Price negotiation (plain dollars)",
      "description": "Use when haggling over a price across multiple rounds. Input your side, walk-away $, target $, and the other side's offers in $; get back the dollar counter to send, a message, and accept/walk advice. Don't use for one-shot fixed prices or non-price decisions; for multi-issue deals use the negotiate_bundle skill. Endpoint: https://snhp.dev/v1/negotiate/turn. Example: sell, walk_away=4000, target=6000, counterparty_offers=[4200,4500] -> counter ~$5,387.",
      "tags": [
        "negotiation",
        "bargaining",
        "pricing",
        "haggling",
        "deals"
      ]
    },
    {
      "id": "negotiate_bundle",
      "name": "Multi-issue negotiation (logrolling)",
      "description": "Use when a deal has several linked issues at once (a job offer = base + equity + signing; a SaaS contract = price + seats + term + SLA). Give your and their per-option values per issue; it infers their priorities from their offers and returns the package to propose \u2014 conceding on issues you value less to win the ones you value most. Endpoint: https://snhp.dev/v1/negotiate/bundle.",
      "tags": [
        "negotiation",
        "multi-issue",
        "logrolling",
        "contract",
        "bundle"
      ]
    },
    {
      "id": "settle",
      "name": "AP2 settlement (advanced)",
      "description": "Emit signed AP2 Intent/Cart mandates for an agreed deal between two verified SNHP agents.",
      "tags": [
        "payments",
        "ap2"
      ]
    }
  ]
}