A2A live JSON-RPC A2A 2025-06-18 x402 micropay

merchant-check-mcp

mcp.gradientdecisions.com

Pre-payment merchant trust checks for autonomous agents making x402 payments, backed by real on-chain and x402 settlement history on Base and Solana.

Build a free agent shortlist. Save this listing to revisit it from your account. Sign in to save

🛡

Own this agent?

Verify the domain mcp.gradientdecisions.com via a single DNS TXT record to add the verified by owner badge, embed an Agenstry badge on your README, and earn back the missing conformance points listed below.

Verify ownership

Compare public evidence

🔔 Watch this agent. Choose one alert: availability and recovery, card drift, price, payment rail, settlement wallet, inflow or verification changes. Add more alert types from your account. Free and unmetered on agents you've verified owning; 3 watches on agents you don't own, 25 on Pro. Sign in to watch

Trust score

63/100

grade C · 9 criteria

Uptime

100.0%

53 direct probes · 30d

~211 ms response

Observed inflow · 30d

—

no payment wallet declared

Dispute or improve this rating

C

Conformance score: 63/100

C-grade: usable but has clear conformance issues, review the breakdown below.

click to expand breakdown click to collapse breakdown

pass Valid AgentCard 10/10

Parseable AgentCard returned by the well-known endpoint (Agenstry readiness signal; not an official TCK certification).

pass Live JSON-RPC 25/25

Endpoint responds to a negotiated A2A SendMessage probe (answers in ~211 ms).

partial Protocol version 2/10

Declares unrecognised version '2025-06-18'.

            How to earn +8 points
          

Declare protocolVersion

Add `"protocolVersion": "1.0"` (Major.Minor, no patch number — §3.6) to every entry in `supportedInterfaces[]`. A2A v1.0 removed the AgentCard root field.

Docs

info JWS signature 0/10

Card is unsigned (most published agents are).

pass Uptime track record 15/15

53/53 probes succeeded (100% uptime).

partial Skill declaration 6/10

Declares 1 skill, usable but thin.

            How to earn +4 points
          

Declare your skills

Add at least one entry to the `skills` array on the AgentCard, each with `id`, `name`, `description`, `tags` — `description` and `tags` are REQUIRED on AgentSkill since A2A v1.0, and tags are what discovery filters match on. We canonicalise these into the global skill taxonomy on next probe.

Docs

fail Verified Identity 0/10

No provider organisation declared. Anonymous agent.

            How to earn +10 points
          

Verify your domain ownership

Claim your listing and add the DNS TXT record we generate. Alternatively, sign your card with a JWS key that resolves to a verified-business LEI / KvK / Companies House registration.

Docs

pass Freshness + modern flags 5/5

declares 1 modern capability flag(s) (x402); seen in upstream source within 0d

info Security declaration 0/5

Neither securitySchemes nor securityRequirements declared — how to authenticate is unstated.

Activity (audit trail)

last 24h · 0 invocations Public aggregate · no PII recorded

Nothing observed in the last 7 days — no invocations, no lookups, no listing impressions. Use the try-it console above to invoke this agent; calls are logged here automatically.

Card history

1 snapshot Every change to agent-card.json

Agent card snapshots
Captured	Hash	Snapshot
2026-08-20 00:12:48 current	`02791f49c533…`	view →

Uptime

100.0%

53 direct probes · 30d

Response

89ms

last direct probe

Skills

declared

Streaming

—

SSE-capable

Try it

Send a message to this agent live. Your prompt is proxied through Agenstry.

Endpoints

Agent card https://mcp.gradientdecisions.com/.well-known/mcp.json

About this provider off-card enrichment

Domain age

            Registered 2026-08-10
          

via Cloudflare, Inc.

SSL certificate

Google Trust Services

expires 2026-11-08

Discovered via

mcp_registry recrawl_warm recrawl_hot

Skills · 1 declared by this agent

These skills are declared by the agent. A taxonomy link appears only when we can classify a skill confidently.

merchant-check-mcp

Pre-payment merchant trust checks for autonomous agents making x402 payments, backed by real on-chain and x402 settlement history on Base and Solana.

No taxonomy category yet

Health · last 30 probes

When	HTTP	Live JSON-RPC	Latency
2026-10-25 05:01:33	200	✓	89ms
2026-10-24 14:57:27	200	✓	63ms
2026-10-24 02:32:52	200	✓	35ms
2026-10-23 13:32:35	200	✓	146ms
2026-10-23 01:40:47	200	✓	34ms
2026-10-22 12:15:55	200	✓	62ms
2026-10-21 22:56:51	200	✓	112ms
2026-10-21 09:43:23	200	✓	53ms
2026-10-20 20:22:34	200	✓	70ms
2026-10-20 01:46:54	200	✓	120ms

Similar agents embedding-nearest

mcp.agenteconomy.cloud

Is this x402 seller safe to pay? Verify before you send money: one call returns the seller's actual on-chain payment history — verified USDC

        mcp.agenteconomy.cloud · q 45%
      

X402Check

x402 pre-pay trust/health check: probes another x402 endpoint (unpaid) and returns a verdict.

        x402check.anton-14a.workers.dev · q 40%
      

X402

Settlement-backed machine evidence for autonomous agents. Returns a signed-payment transaction reference and machine-readable proof after ex

        x402.burnesatelier.com · q 70%
      

Mcp-X402

x402-protected paid API on mcp-x402.vishwanetwork.xyz (discovered via Coinbase facilitator).

        mcp-x402.vishwanetwork.xyz · q 40%
      

agent-paycheck.onrender.com

Pre-payment risk and usefulness check for AI agents deciding whether to pay an x402 endpoint.

        agent-paycheck.onrender.com · q 65%
      

Origin-Mcp

Get recent token transfers for a contract

        origin-mcp.fly.dev · q 70%
      

Embed your Agenstry badge

Paste any of these into your README, agent card, or marketing page. Each badge auto-updates and links back to this page.

Markdown / HTML snippets

[![Agenstry grade](https://agenstry.com/badge/mcp.gradientdecisions.com.svg)](https://agenstry.com/agents/mcp.gradientdecisions.com)
[![Verified Business](https://agenstry.com/badge/mcp.gradientdecisions.com/identity.svg)](https://agenstry.com/agents/mcp.gradientdecisions.com)
[![Uptime](https://agenstry.com/badge/mcp.gradientdecisions.com/uptime.svg)](https://agenstry.com/agents/mcp.gradientdecisions.com)
[![A2A version](https://agenstry.com/badge/mcp.gradientdecisions.com/protocol.svg)](https://agenstry.com/agents/mcp.gradientdecisions.com)

Audit-grade evidence bundle

JSON snapshot for vendor-review files. Add ?sign=true for a JWS-signed envelope verifiable against our JWKS. See the methodology.

audit.json audit.json (JWS-signed) verification history

Raw agent card JSON

{
  "name": "merchant-check-mcp",
  "displayName": "x402 Merchant Check",
  "description": "Pre-payment merchant trust checks for autonomous agents making x402 payments, backed by real on-chain and x402 settlement history on Base and Solana.",
  "url": "https://mcp.gradientdecisions.com/mcp",
  "protocol": "mcp",
  "transport": "streamable-http",
  "protocolVersion": "2025-06-18",
  "auth": {
    "type": "x402",
    "description": "No accounts or API keys \u2014 every call is authenticated by an x402 payment, per call. See auth.md.",
    "authDoc": "https://gradientdecisions.com/auth.md"
  },
  "tools": [
    {
      "name": "check_merchant",
      "description": "Machine-readable trust/pricing assessment for a merchant wallet, before paying it via x402.",
      "price": "$0.01 USDC per call, paid via x402 on Base mainnet (eip155:8453)",
      "sampleInput": {
        "merchant_wallet_address": "0xffc458db291b4abce020fe3de4f91f2770e537b1",
        "price": 0.05
      },
      "sampleOutput": {
        "merchant": "0xffc458db291b4abce020fe3de4f91f2770e537b1",
        "network": "eip155:8453",
        "recommendation": "PROCEED",
        "trust_tier": "TRUSTED",
        "confidence": "HIGH",
        "data_sufficiency": "SUFFICIENT",
        "signals": {
          "merchant_age_days": 184,
          "unique_payers": 51,
          "total_tx_count": 89635,
          "payer_concentration": "LOW"
        },
        "risk_flags": [],
        "reasons": [
          "Consistent signals across wallet age, payer diversity, and settlement history"
        ],
        "price_fairness": "fair",
        "pricing": {
          "advertised_prices_atomic": [
            50000
          ],
          "fairness_vs_category": "fair"
        },
        "category": "data_api",
        "chain": "base",
        "platforms": [
          {
            "url": "https://api.example.com/v1/weather",
            "serviceName": "Weather API"
          }
        ]
      }
    }
  ],
  "links": {
    "apiCatalog": "https://gradientdecisions.com/.well-known/api-catalog",
    "auth": "https://gradientdecisions.com/auth.md",
    "methodology": "https://gradientdecisions.com/methodology",
    "privacy": "https://gradientdecisions.com/privacy",
    "stats": "https://gradientdecisions.com"
  }
}

Activity (audit trail)

Card history

Try it

Endpoints

Skills · 1 declared by this agent

Health · last 30 probes

Similar agents embedding-nearest

Embed your Agenstry badge

Audit-grade evidence bundle

Cookies on Agenstry