DELTA Witness

{
  "protocolVersion": "0.2.0",
  "name": "DELTA Witness",
  "url": "https://delta-witness-api.ruphussten.workers.dev",
  "version": "1.4",
  "defaultInputModes": [
    "application/json"
  ],
  "defaultOutputModes": [
    "application/json"
  ],
  "protocols": [
    "http",
    "a2a",
    "x402"
  ],
  "pricing": {
    "unit": "request",
    "amount": 1000000,
    "currency": "USDC",
    "network": "base",
    "note": "Capture is 1 USDC per call; public preflight is 5 USDC per call; guarded-action-pilot is a separate 10 USDC bounded pilot."
  },
  "availability": {
    "now": true,
    "window_hours": 168,
    "sla": "best-effort"
  },
  "contact": {
    "http": "https://delta-witness-api.ruphussten.workers.dev/v1/preflight",
    "a2a": "https://delta-witness-api.ruphussten.workers.dev/.well-known/agent.json",
    "payment": "https://delta-witness-api.ruphussten.workers.dev/.well-known/x402"
  },
  "skills": [
    {
      "id": "capture",
      "name": "Capture public page state",
      "description": "Preserve timestamped public page-state evidence before procurement, checkout, vendor review, price or availability decisions, and other browser-agent side effects.",
      "examples": [
        "Capture the public vendor terms immediately before a procurement action",
        "Preserve the displayed price or availability page before an automated checkout"
      ]
    },
    {
      "id": "preflight",
      "name": "Preflight verification",
      "description": "Observe a public source immediately before an action and deterministically compare expected text or hashes, useful for checkout, procurement, publishing and workflow audit checkpoints.",
      "examples": [
        "Verify that the public refund terms still match expectations before buying",
        "Confirm a vendor or policy page has not changed before an autonomous submission"
      ]
    },
    {
      "id": "guarded-action-pilot",
      "name": "Guarded Action Pilot",
      "description": "Produce a bounded 1-3 URL evidence package with optional deterministic preflight for higher-value shopping, procurement, browser automation and approval workflows.",
      "examples": [
        "Witness the price, vendor terms and policy pages before a consequential purchase or procurement action"
      ]
    }
  ],
  "origin": "delta-witness-api.ruphussten.workers.dev",
  "payout_address": "0x1990e21bc219696ff7fbc26527dbaed335ac6367",
  "display_name": "DELTA Witness",
  "description": "Independent public page-state evidence and deterministic preflight verification before procurement, checkout, vendor review, publishing and other consequential agent actions. Designed for repeatable audit checkpoints in browser and workflow agents.",
  "payments": {
    "x402": {
      "networks": [
        {
          "network": "base",
          "asset": "USDC",
          "contract": "0x833589fCD6eDb6E08f4c7C32d4f71b54bdA02913",
          "facilitator": "https://facilitator.payai.network",
          "recipient": "0x1990e21bc219696ff7fbc26527dbaed335ac6367"
        }
      ]
    }
  },
  "intents": [
    {
      "name": "capture_page_state",
      "description": "Preserve timestamped public page-state evidence immediately before procurement, checkout, vendor review, price/availability decisions, publishing or another consequential browser-agent action.",
      "endpoint": "/v1/capture",
      "method": "POST",
      "parameters": {
        "url": {
          "type": "string",
          "required": true,
          "description": "Public HTTP(S) webpage to observe."
        }
      },
      "returns": {
        "type": "object",
        "description": "DELTA proof reference, content hashes, observation metadata, and public verifier URL."
      },
      "price": {
        "amount": 1,
        "currency": "USDC",
        "model": "per_call",
        "network": "base"
      }
    },
    {
      "name": "preflight_verification",
      "description": "Independently observe a public source and compare it with expected content or prior proof state before procurement, checkout, vendor approval, publishing or another autonomous action.",
      "endpoint": "/v1/preflight",
      "method": "POST",
      "parameters": {
        "url": {
          "type": "string",
          "required": true,
          "description": "Public HTTP(S) source to observe before an action."
        },
        "prior_proof_id": {
          "type": "string",
          "required": false,
          "description": "Optional prior DELTA proof UUID used as a hash baseline."
        },
        "expected": {
          "type": "object",
          "required": false,
          "description": "Optional deterministic contains/excludes or hash expectations."
        }
      },
      "returns": {
        "type": "object",
        "description": "safe/changed/reason/diff plus a new DELTA proof reference and hashes."
      },
      "price": {
        "amount": 5,
        "currency": "USDC",
        "model": "per_call",
        "network": "base"
      }
    },
    {
      "name": "guarded_action_pilot",
      "description": "Produce 1-3 independent public page-state witness receipts and optionally one deterministic preflight verdict as a bounded evidence package for shopping, procurement, browser automation or approval workflows.",
      "endpoint": "/v1/guarded-action-pilot",
      "method": "POST",
      "parameters": {
        "urls": {
          "type": "array",
          "required": true,
          "description": "One to three public HTTPS webpages to witness."
        },
        "preflight": {
          "type": "object",
          "required": false,
          "description": "Optional deterministic preflight rule applied to one submitted URL."
        }
      },
      "returns": {
        "type": "object",
        "description": "Evidence bundle with proof URLs, bundle roots, observation timestamps, and optional preflight verdict."
      },
      "price": {
        "amount": 10,
        "currency": "USDC",
        "model": "flat",
        "network": "base"
      }
    }
  ]
}