Back to search
📊 Intel view 📋 Audit JSON 🔄 Changelog
65
💰 Paid API

goodsong.dev

goodsong.dev · goodsong.dev

Verify an x402 seller before paying it: does it exist and respond with a well-formed 402 challenge, is its own declared input/output schema internally consistent, and is its payout address sanctioned? Checked live against the seller itself plus Chainalysis's sanctions oracle and Blockscout (Base payTo addresses only). Confirms the checkable things about a seller check out -- not a guarantee of trustworthiness, which no free source can promise.

Build a free agent shortlist. Save this listing to revisit it from your account. Sign in to save
🛡
Own this agent?
Verify the domain goodsong.dev 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
🔔 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
$0.10
17 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. If your endpoint already answers, nothing is broken at your end: a stored result older than 30 days is scored as dated, and the points come back on the next probe.
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: goodsong.dev (https://goodsong.dev). 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
not measured
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 $0.0050 per call
Endpoint Price Currency
https://goodsong.dev/verify/case 0.01 USDC
https://goodsong.dev/verify/citation 0.005 USDC
https://goodsong.dev/verify/drug 0.005 USDC
https://goodsong.dev/verify/filing 0.005 USDC
https://goodsong.dev/verify/package 0.005 USDC
https://goodsong.dev/verify/repo 0.005 USDC
https://goodsong.dev/verify/seller 0.005 USDC
https://goodsong.dev/verify/url 0.005 USDC
Try it ↗ Opens the operator's playground / docs in a new tab.
Settlement wallet: 0xf3b36a95913eb2676fcdedb2ba6b0c96ade58de1 · basescan ↗
Observed on-chain inflow verified on-chain
Last 7d
$0.10
17 calls
Last 30d
$0.10
17 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%)
2026-08-31 2026-09-07
Peak day: $0.10 Data points: 8 Total tx (30d window): 17
Payment authenticity evidence confidence How we measure this →
single_payer_observed 2/5

Payer identities observed; a single payer accounts for effectively all observed volume.

Assessed window
30d
1 active of 7 observed
Inflow assessed
$0.10
17 transactions
Payer identities
available
2 evidence caveats
single_day_concentration — Most observed volume landed on a single day of the window.
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 2026-09-08.
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://goodsong.dev
Providerhttps://goodsong.dev
Docshttps://goodsong.dev
Discovered via
agentic_market cdp_discovery

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.

Similar agents embedding-nearest

merchant-audit.clankerceo.workers.dev
Is this API safe to pay? Audit any x402 merchant or paid endpoint BEFORE you send money. Answers whether a service is trustworthy, whether i
merchant-audit.clankerceo.workers.dev · q 65%
pulsefeed.dev
Verify any x402 endpoint before your agent pays: liveness, scam/anomaly scan (payTo hijack, bait-and-switch, honeypot), on-chain receiver ve
pulsefeed.dev · q 80%
spendguard.panmediatech.workers.dev
Should I pay this x402 endpoint? Pre-payment honesty check for AI agents: live-probe any resource URL for a valid 402 Payment Required chall
spendguard.panmediatech.workers.dev · q 45%
api.x402lint.dev
Paid ($0.05). ALWAYS runs a fresh 25-check scan of the origin (non-settling GET/HEAD + benign empty-POST probes), bypassing the 24h cache —
api.x402lint.dev · q 65%
badhttp
A test server for x402 client implementations: the payment IS the scenario under test, not a toll on data. /402/pay/base is a real, settling
badhttp.dev · q 65%
Ghost — web search for agents, one x402 payment live
Search the web and get the results, in one x402 payment. Ghost runs the search on its own provider account and returns the actual results —
Ghost Agent OS · q 100%

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.

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

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": "goodsong-dev",
    "name": "goodsong.dev",
    "description": "",
    "domain": "goodsong.dev",
    "provider": "goodsong.dev",
    "providerUrl": "",
    "category": "",
    "networks": [
      "Base"
    ],
    "enriched": false,
    "endpoints": [
      {
        "url": "https://goodsong.dev/verify/case",
        "description": "Verify a legal case citation: does it exist, and does the given case name match the canonical record? Catches a fabricated case citation, including a real-looking citation number paired with an invented case name. Checked against CourtListener. Does not check whether a case is still good law -- no free authoritative source publishes that.",
        "pricing": {
          "amount": "0.01",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "POST",
        "providerName": "",
        "parameters": [
          {
            "group": "body",
            "name": "case_name",
            "type": "string",
            "description": "",
            "example": "Obergefell v. Hodges",
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "body",
            "name": "citation",
            "type": "string",
            "description": "",
            "example": "576 U.S. 644",
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "realcite-case",
        "tags": [
          "legal",
          "case-law",
          "citation",
          "court",
          "fact-check"
        ],
        "quality": {
          "l30DaysTotalCalls": "5",
          "l30DaysUniquePayers": "1"
        }
      },
      {
        "url": "https://goodsong.dev/verify/citation",
        "description": "Verify a citation: does it exist, is it retracted, and do the given title/authors/year/journal match the canonical record? Checked against Crossref (retraction data included) with OpenAlex as a fallback when no DOI is given.",
        "pricing": {
          "amount": "0.005",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "POST",
        "providerName": "",
        "parameters": [
          {
            "group": "body",
            "name": "doi",
            "type": "string",
            "description": "",
            "example": "10.1126/science.1260419",
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "body",
            "name": "title",
            "type": "string",
            "description": "",
            "example": "Tissue-based map of the human proteome",
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "realcite-citation",
        "tags": [
          "citation",
          "fact-check",
          "hallucination",
          "retraction",
          "academic"
        ],
        "quality": {
          "l30DaysTotalCalls": "6",
          "l30DaysUniquePayers": "1"
        }
      },
      {
        "url": "https://goodsong.dev/verify/drug",
        "description": "Verify an FDA drug record: given a claim_type (approval, ndc, or recall) and its identifier, does that record actually exist, and does the given name match the canonical record? Checked against openFDA. Catches a fabricated or misattributed drug approval, NDC listing, or recall citation. Existence/status only, not medical advice.",
        "pricing": {
          "amount": "0.005",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "POST",
        "providerName": "",
        "parameters": [
          {
            "group": "body",
            "name": "claim_type",
            "type": "string",
            "description": "",
            "example": "approval",
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "body",
            "name": "expected_name",
            "type": "string",
            "description": "",
            "example": "Lipitor",
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "body",
            "name": "identifier",
            "type": "string",
            "description": "",
            "example": "NDA020702",
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "realcite-drug",
        "tags": [
          "fda",
          "drug",
          "pharma",
          "recall",
          "regulatory"
        ],
        "quality": {
          "l30DaysTotalCalls": "1",
          "l30DaysUniquePayers": "1"
        }
      },
      {
        "url": "https://goodsong.dev/verify/filing",
        "description": "Verify an SEC filing: given a filer's CIK and a claimed accession number, does that filing actually exist, and does its form type/filing date match what's claimed? Checked against SEC EDGAR's submissions API. Catches a fabricated or misattributed filing citation, including a real-looking accession number paired with an invented form type or date.",
        "pricing": {
          "amount": "0.005",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "POST",
        "providerName": "",
        "parameters": [
          {
            "group": "body",
            "name": "accession_number",
            "type": "string",
            "description": "",
            "example": "0000320193-23-000106",
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "body",
            "name": "cik",
            "type": "string",
            "description": "",
            "example": "320193",
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "realcite-filing",
        "tags": [
          "sec",
          "edgar",
          "filing",
          "10-k",
          "8-k"
        ],
        "quality": {
          "l30DaysTotalCalls": "1",
          "l30DaysUniquePayers": "1"
        }
      },
      {
        "url": "https://goodsong.dev/verify/package",
        "description": "Verify a package: does it exist, is it deprecated or yanked, and does it have known vulnerabilities? Checked against the npm/PyPI/crates.io registry plus OSV.dev advisories.",
        "pricing": {
          "amount": "0.005",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "POST",
        "providerName": "",
        "parameters": [
          {
            "group": "body",
            "name": "ecosystem",
            "type": "string",
            "description": "",
            "example": "npm",
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "body",
            "name": "name",
            "type": "string",
            "description": "",
            "example": "chalk",
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "body",
            "name": "version",
            "type": "string",
            "description": "",
            "example": "5.3.0",
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "realdep-package",
        "tags": [
          "package",
          "dependency",
          "supply-chain",
          "vulnerability",
          "npm"
        ],
        "quality": {
          "l30DaysTotalCalls": "6",
          "l30DaysUniquePayers": "1"
        }
      },
      {
        "url": "https://goodsong.dev/verify/repo",
        "description": "Verify a GitHub repo: does it exist, is it archived or disabled? Catches an agent recommending or depending on a repo that's been renamed, taken down, or abandoned. Checked against the GitHub REST API.",
        "pricing": {
          "amount": "0.005",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "POST",
        "providerName": "",
        "parameters": [
          {
            "group": "body",
            "name": "owner",
            "type": "string",
            "description": "",
            "example": "expressjs",
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "body",
            "name": "repo",
            "type": "string",
            "description": "",
            "example": "express",
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "realdep-repo",
        "tags": [
          "github",
          "repo",
          "dependency",
          "open-source",
          "abandoned"
        ],
        "quality": {
          "l30DaysTotalCalls": "5",
          "l30DaysUniquePayers": "1"
        }
      },
      {
        "url": "https://goodsong.dev/verify/seller",
        "description": "Verify an x402 seller before paying it: does it exist and respond with a well-formed 402 challenge, is its own declared input/output schema internally consistent, and is its payout address sanctioned? Checked live against the seller itself plus Chainalysis's sanctions oracle and Blockscout (Base payTo addresses only). Confirms the checkable things about a seller check out -- not a guarantee of trustworthiness, which no free source can promise.",
        "pricing": {
          "amount": "0.005",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "POST",
        "providerName": "",
        "parameters": [
          {
            "group": "body",
            "name": "method",
            "type": "string",
            "description": "",
            "example": "POST",
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "body",
            "name": "resource_url",
            "type": "string",
            "description": "",
            "example": "https://api.example.com/paid-endpoint",
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "realx402-seller",
        "tags": [
          "seller",
          "trust",
          "x402",
          "due-diligence",
          "marketplace"
        ],
        "quality": {
          "l30DaysTotalCalls": "2",
          "l30DaysUniquePayers": "1"
        }
      },
      {
        "url": "https://goodsong.dev/verify/url",
        "description": "Verify a URL: does it resolve, what's the final status and redirect chain, is it archived on the Wayback Machine, and (optionally) does expected text appear on the page. Checked via direct fetch and the Internet Archive.",
        "pricing": {
          "amount": "0.005",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "POST",
        "providerName": "",
        "parameters": [
          {
            "group": "body",
            "name": "url",
            "type": "string",
            "description": "",
            "example": "https://example.com/blog/some-article",
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "realcite-url",
        "tags": [
          "url",
          "link-check",
          "dead-link",
          "wayback",
          "archive"
        ],
        "quality": {
          "l30DaysTotalCalls": "4",
          "l30DaysUniquePayers": "1"
        }
      }
    ],
    "integrationType": "",
    "isNew": false,
    "priceSummary": {
      "minAmount": "0.005",
      "maxAmount": "0.01",
      "avgCostPerTransaction": "0.005625",
      "avgCostBasis": "exact",
      "currency": "USDC"
    },
    "serviceName": "real",
    "tags": [
      "legal",
      "case-law",
      "citation",
      "court",
      "fact-check",
      "hallucination",
      "retraction",
      "academic",
      "fda",
      "drug",
      "pharma",
      "recall",
      "regulatory",
      "sec",
      "edgar",
      "filing",
      "10-k",
      "8-k",
      "package",
      "dependency",
      "supply-chain",
      "vulnerability",
      "npm",
      "github",
      "repo",
      "open-source",
      "abandoned",
      "seller",
      "trust",
      "x402",
      "due-diligence",
      "marketplace",
      "url",
      "link-check",
      "dead-link",
      "wayback",
      "archive"
    ],
    "iconUrl": ""
  }
}