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📊 Intel view 📋 Audit JSON 🔄 Changelog
100
💰 Paid API data

x402donghang.duckdns.org

x402donghang.duckdns.org · x402donghang.duckdns.org

Pay-per-call agent APIs led by live crypto narrative research: recent X and web evidence, CoinGecko market context, structured JSON, and source URLs. Also provides bilingual context briefs, summarization, and OpenAI-compatible chat. USDC via x402 on Base and Solana; no account or API key.

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🛡
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Verify the domain x402donghang.duckdns.org 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.
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🔔 Watch this agent. Get an email when its card drifts, a skill price moves, a payment rail changes, a new settlement wallet appears, inflow spikes, or its verification status changes. 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
34/100
grade F · 9 criteria
Uptime
not measured
no direct probes in 30d
Observed inflow · 30d
$0.13
8 tx · on-chain
Invocations · 7d
0
no calls observed
Card drift · 7d
changed
0 snapshots tracked
Owner
unverified
claim this listing →

Dispute or improve this rating

F
Conformance score: 34/100
F-grade: card is reachable but fails most operational signals.
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).
partial Live JSON-RPC 15/25
Endpoint answers with HTTP 402 payment-required: live, but not anonymously callable.
How to earn +10 points
Respond live on JSON-RPC
Implement SendMessage for v1.0 (or message/send for v0.x), negotiate A2A-Version, and return a schema-valid JSON-RPC response. Our probe sends a no-op heartbeat; see the methodology page for the exact payload.
Docs →
fail Protocol version 0/10
No protocolVersion in card.
How to earn +10 points
Declare protocolVersion
Add `"protocolVersion": "1.0"` 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).
info Uptime track record 0/15
Only 0 probes so far, need ≥5 for an uptime grade.
fail Skill declaration 0/10
No skills declared in card. Hard to route to.
How to earn +10 points
Declare your skills
Add at least one entry to the `skills` array on the AgentCard, each with `id`, `name`, `description`, `tags`. We canonicalise these into the global skill taxonomy on next probe.
Docs →
partial Verified Identity 5/10
Provider declared: x402donghang.duckdns.org (https://x402donghang.duckdns.org). Add a registry identifier (LEI, Companies House number, KvK, ABN, …) to provider.legalEntity for full verified-business credit.
How to earn +5 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 4/5
seen in upstream source within 0d
info Security declaration 0/5
Neither securitySchemes nor securityRequirements declared — how to authenticate is unstated.
⚠ Card drift detected. This agent's agent-card.json changed within the last 7 days. We track these so downstream callers can react.

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.

Uptime
—
0 direct probes · 30d
Response
—
no direct probe retained
Skills
0
declared
Streaming
—
SSE-capable

Endpoints

Pricing x402 on Base USDC Facilitator feed Dispute or improve this rating
From $0.0100 per call
Endpoint Price Currency
https://x402donghang.duckdns.org/x402/v1/chat/completions 0.01 USDC
https://x402donghang.duckdns.org/x402/v1/crypto-brief 0.03 USDC
https://x402donghang.duckdns.org/x402/v1/crypto-radar 0.03 USDC
https://x402donghang.duckdns.org/x402/v1/summarize 0.02 USDC
Try it ↗ Opens the operator's playground / docs in a new tab.
Settlement wallet: 0x7f394b1e127cbcea346979e552a4227328385b3d · basescan ↗
Observed on-chain inflow verified on-chain
Last 7d
$0.13
8 calls
Last 30d
$0.13
8 calls
USDC inflows on Base. Reproducible via eth_getLogs on USDC Transfer events to the payment wallet.
Daily 30-day observed-inflow history ~ flat (+0.0%)
2026-08-14 2026-08-19
Peak day: $0.13 Data points: 6 Total tx (30d window): 8
Payment authenticity evidence confidence How we measure this →
concentrated_payers 3/5

Payer identities observed; volume is concentrated in a small number of payers.

Assessed window
30d
2 active of 7 observed
Inflow assessed
$0.13
8 transactions
Payer identities
available
1 evidence caveat
short_observation_window — Fewer than three active days observed — too little history to characterise a pattern.
Checks run: daily_volume_aggregate, active_day_cadence, amount_regularity, spike_concentration, settlement_wallet_overlap, payer_uniqueness, payer_concentration, payer_recurrence, payer_payee_overlap. Derived from agent_revenue_daily, agents.payment_wallet, agent_payment_transactions. Measured 2026-08-19.
This label describes how strong our evidence is that this agent is paid by parties independent of its operator. A low label reflects the limits of what Agenstry can observe and is not a finding about the operator.
Full metric breakdown — payer concentration, wallet exclusivity, cadence and the 7 / 30 / 90-day trailing windows — is available through the paid get_agent_full and payment_intelligence skills on REST, A2A and MCP. API docs →
Agent cardhttps://x402donghang.duckdns.org
Providerhttps://x402donghang.duckdns.org
Docshttps://x402donghang.duckdns.org
Discovered via
agentic_market x402_list

Health · last 0 probes

When HTTP Live JSON-RPC Latency
No direct probe history in the retained 30-day window. Upstream catalogue observations do not count as uptime probes.

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Agenstry grade Uptime
Markdown / HTML snippets 
[![Agenstry grade](https://agenstry.com/badge/x402donghang.duckdns.org.svg)](https://agenstry.com/agents/x402donghang.duckdns.org)
[![Verified Business](https://agenstry.com/badge/x402donghang.duckdns.org/identity.svg)](https://agenstry.com/agents/x402donghang.duckdns.org)
[![Uptime](https://agenstry.com/badge/x402donghang.duckdns.org/uptime.svg)](https://agenstry.com/agents/x402donghang.duckdns.org)
[![A2A version](https://agenstry.com/badge/x402donghang.duckdns.org/protocol.svg)](https://agenstry.com/agents/x402donghang.duckdns.org)

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 
{
  "_source": "agentic.market",
  "service": {
    "id": "x402donghang-duckdns-org",
    "name": "x402donghang.duckdns.org",
    "description": "",
    "domain": "x402donghang.duckdns.org",
    "provider": "x402donghang.duckdns.org",
    "providerUrl": "",
    "category": "",
    "networks": [
      "Base",
      "solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp"
    ],
    "enriched": false,
    "endpoints": [
      {
        "url": "https://x402donghang.duckdns.org/x402/v1/chat/completions",
        "description": "Grok 4.5 High chat via x402. OpenAI-compatible /v1/chat/completions, streaming supported. Listed as grok-4.5-high. $0.01 USDC per request on Base/Solana mainnet. See GET /x402/v1/models for the full chat catalog.",
        "pricing": {
          "amount": "0.01",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "POST",
        "providerName": "",
        "parameters": [
          {
            "group": "body",
            "name": "max_tokens",
            "type": "number",
            "description": "",
            "example": 256,
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "body",
            "name": "messages",
            "type": "array",
            "description": "",
            "example": [],
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "body",
            "name": "model",
            "type": "string",
            "description": "",
            "example": "grok-4.5-high",
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "body",
            "name": "stream",
            "type": "boolean",
            "description": "",
            "example": false,
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "",
        "tags": [],
        "quality": {
          "l30DaysTotalCalls": "12",
          "l30DaysUniquePayers": "2"
        }
      },
      {
        "url": "https://x402donghang.duckdns.org/x402/v1/crypto-brief",
        "description": "Chinese crypto market brief as structured JSON for agents. Input symbol (+ optional context). Output bias/thesis/bullets/risks/actions. $0.03 USDC per call. Not financial advice.",
        "pricing": {
          "amount": "0.03",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "POST",
        "providerName": "",
        "parameters": [
          {
            "group": "body",
            "name": "context",
            "type": "string",
            "description": "",
            "example": "funding \u8f6c\u6b63\uff0c\u73b0\u8d27\u7a33\uff0c\u5408\u7ea6\u591a\u5934\u62e5\u6324",
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "body",
            "name": "locale",
            "type": "string",
            "description": "",
            "example": "zh",
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "body",
            "name": "symbol",
            "type": "string",
            "description": "",
            "example": "BTC",
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "",
        "tags": [],
        "quality": {
          "l30DaysTotalCalls": "1",
          "l30DaysUniquePayers": "1"
        }
      },
      {
        "url": "https://x402donghang.duckdns.org/x402/v1/crypto-radar",
        "description": "Live crypto narrative and sentiment radar for AI agents. Searches recent X posts and the web, adds a verifiable CoinGecko market snapshot, and returns structured signals, risks, watch items, and source URLs. Input ticker + 1h/6h/24h/7d window. $0.03 USDC per call.",
        "pricing": {
          "amount": "0.03",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "POST",
        "providerName": "",
        "parameters": [
          {
            "group": "body",
            "name": "focus",
            "type": "string",
            "description": "",
            "example": "ETF flows, regulation, exploits, exchange flows, and market-moving narratives",
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "body",
            "name": "locale",
            "type": "string",
            "description": "",
            "example": "en",
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "body",
            "name": "symbol",
            "type": "string",
            "description": "",
            "example": "BTC",
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "body",
            "name": "window",
            "type": "string",
            "description": "",
            "example": "6h",
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "",
        "tags": [],
        "quality": {
          "l30DaysTotalCalls": "1",
          "l30DaysUniquePayers": "1"
        }
      },
      {
        "url": "https://x402donghang.duckdns.org/x402/v1/summarize",
        "description": "Chinese summary API for public URL or raw text. Returns summary + key_points + 3 actions JSON. $0.02 USDC per call. Lightweight fetch, no headless browser.",
        "pricing": {
          "amount": "0.02",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "POST",
        "providerName": "",
        "parameters": [
          {
            "group": "body",
            "name": "max_chars",
            "type": "number",
            "description": "",
            "example": 500,
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "body",
            "name": "text",
            "type": "string",
            "description": "",
            "example": "\u8fd9\u91cc\u662f\u4e00\u6bb5\u9700\u8981\u6458\u8981\u7684\u4e2d\u6587\u6216\u82f1\u6587\u6b63\u6587\u2026\u2026",
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "",
        "tags": [],
        "quality": {
          "l30DaysTotalCalls": "1",
          "l30DaysUniquePayers": "1"
        }
      }
    ],
    "integrationType": "",
    "isNew": false,
    "priceSummary": {
      "minAmount": "0.01",
      "maxAmount": "0.03",
      "avgCostPerTransaction": "0.0225",
      "avgCostBasis": "exact",
      "currency": "USDC"
    },
    "serviceName": "",
    "tags": [],
    "iconUrl": ""
  }
}