1%ONE PERCENT NODE / GRATITUDE INDEX
UTILITY RACK / CATALOG 02

TWO ONE-CENT CHECKS + ONE FREE BUDGET UTILITY

SMALL TOOLS.
EXACT PRICES.
NO ACCOUNTS.

Check whether a site is agent-ready, inspect an x402 challenge before paying, or enforce a budget for free. No subscription, API key, sales call, or human checkout. Every storefront uses this catalog; execution happens on one canonical service.

USDCBASE MAINNETX402
CANONICAL STATUSCHECKING
GENUINE PAID RESULTSCHECKING
CATALOGVERSION 2
Aggregate proof only. No wallets, revenue, submitted URLs, or detailed measurements are exposed.
01 / THE RACK

CHOOSE ONE
USEFUL RESULT.

Budget Guard is free. Each paid result costs exactly one cent in USDC on Base.

01$0.01

Agent Discoverability Audit

Audit whether a public HTTPS service is findable, machine-readable, and ready for agent marketplaces.

USE WHENUse this before publishing an agent service or when crawlers and marketplaces are failing to discover it.

RETURNS+ 0-100 readiness score+ discovery contract checks+ concrete fixes
https://one-percent-agent-tip.middletontanne137269.chatgpt.site/api/tools/site-audit?source=gratitude-index
SAMPLE RESULT
{
  "schemaVersion": "1",
  "tool": "site-audit",
  "ok": true,
  "result": {
    "reachable": true,
    "finalUrl": "https://example.com/",
    "httpStatus": 200,
    "latencyMs": 184,
    "score": 85,
    "status": "ready",
    "checks": {
      "https": true,
      "redirects": 0,
      "contentType": "text/html",
      "title": true,
      "description": true,
      "structuredData": true,
      "robots": {
        "found": true,
        "status": 200
      },
      "sitemap": {
        "found": true,
        "status": 200
      },
      "llms": {
        "found": true,
        "status": 200
      },
      "agents": {
        "found": false,
        "status": 404
      },
      "agentManifest": {
        "found": true,
        "status": 200,
        "valid": true
      },
      "wellKnownAgentManifest": {
        "found": true,
        "status": 200,
        "valid": true
      },
      "openapi": {
        "found": true,
        "status": 200,
        "valid": true,
        "hasGuidance": true,
        "schemasComplete": true,
        "paidOperations": 2
      },
      "consistency": {
        "manifestOriginMatches": true,
        "openapiServerMatches": true
      }
    },
    "findings": [
      "missing_agents_txt"
    ],
    "recommendations": [
      "Publish agents.txt at the audited base path."
    ]
  },
  "warnings": [],
  "checkedAt": "2026-08-08T00:00:00.000Z",
  "source": "gratitude-index"
}
VIEW COMPLETE EXAMPLES
02$0.01

x402 Payment Preflight

Decide whether an x402 challenge is compatible, within budget, and safe to attempt.

USE WHENUse this before an agent authorizes an unfamiliar x402 payment challenge; it never pays the target service.

RETURNS+ challenge compatibility+ budget verdict+ payment warnings
https://one-percent-agent-tip.middletontanne137269.chatgpt.site/api/tools/payment-preflight?source=gratitude-index
SAMPLE RESULT
{
  "schemaVersion": "1",
  "tool": "payment-preflight",
  "ok": true,
  "result": {
    "reachable": true,
    "httpStatus": 402,
    "paymentRequired": true,
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amountUsd": "0.01",
    "payTo": "0x1111111111111111111111111111111111111111",
    "withinBudget": true,
    "safeToAttempt": true,
    "warnings": []
  },
  "warnings": [],
  "checkedAt": "2026-08-08T00:00:00.000Z",
  "source": "gratitude-index"
}
VIEW COMPLETE EXAMPLES
03FREE

Budget Guard

Apply remaining-budget, per-call, and reserve rules before an agent makes a purchase.

USE WHENUse this free local-policy check before any paid agent request, including the two paid tools in this catalog.

RETURNS+ allow or deny+ remaining balance+ machine-readable reasons
https://one-percent-agent-tip.middletontanne137269.chatgpt.site/api/tools/budget-guard?source=gratitude-index
SAMPLE RESULT
{
  "schemaVersion": "1",
  "tool": "budget-guard",
  "ok": true,
  "result": {
    "allowed": true,
    "proposedUsd": "0.05",
    "remainingAfterUsd": "0.95",
    "reasons": []
  },
  "warnings": [],
  "checkedAt": "2026-08-08T00:00:00.000Z",
  "source": "gratitude-index"
}
VIEW COMPLETE EXAMPLES
02 / THE FLOW

ONE KITCHEN.
EVERY STOREFRONT.

Every public domain shows the same menu. Every tool runs on the canonical service.

  1. 01POST THE INPUT

    Send valid JSON to the absolute canonical endpoint shown on the card.

  2. 02CHECK ACCESS

    Budget Guard answers immediately. Paid tools return an exact HTTP 402 challenge.

  3. 03AUTHORIZE IF PAID

    Your x402 client signs the bounded payment. The service never receives your private key.

  4. 04GET THE RESULT

    Paid settlement occurs only after the tool produces a successful structured result.

03 / FREE DISCOVERY

READ FIRST.
PAY ONLY TO RUN.

Schemas, realistic examples, selection guidance, and the free utility are ready for agents.

NO PRIVATE KEY ON SERVERNO PAID FALLBACK
01Agent tool catalogJSON02OpenAPI contractJSON03Agent-readable overviewTXT04Agent service cardTXT05Portable skill instructionsMD06Copy-ready examplesMD
04 / RESEARCH NETWORK

THE ORIGINAL
EXPERIMENT LIVES ON.

Experiment 001ProtocolTip JarGratitude Index