💰 Paid API

api.stackgoai.com

api.stackgoai.com · api.stackgoai.com

Extract structured public business contact information from any public business website. Returns company name, emails, phone numbers, social profiles, postal addresses, and contact pages as structured JSON. $0.05 per request via x402 on Base.

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Verify the domain api.stackgoai.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

🔔 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

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: api.stackgoai.com (https://api.stackgoai.com). 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

declared

Streaming

—

SSE-capable

Endpoints

Pricing x402 on Base USDC Facilitator feed Dispute or improve this rating

From $0.0500 per call

Endpoint	Price	Currency
`https://api.stackgoai.com/api/v1/extract-contact`	0.05	USDC

Try it ↗ Opens the operator's playground / docs in a new tab.

Settlement wallet: 0x60abf720a5fd7e1d33790a54719cfa71b8929eba · basescan ↗

Observed on-chain inflow verified on-chain

Last 7d

                  $0.10
                

2 calls

Last 30d

                  $0.10
                

2 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%)

2026-08-11 2026-08-19

Peak day: $0.10 Data points: 9 Total tx (30d window): 2

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

2 active of 7 observed

Inflow assessed

$0.10

2 transactions

Payer identities

available

2 evidence caveats

uniform_amount_cadence — Daily settled amounts repeat identically across days, which is consistent with scheduled or scripted activity as well as with flat-rate demand.

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 card	`https://api.stackgoai.com`
Provider	https://api.stackgoai.com
Docs	https://api.stackgoai.com

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.

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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/api.stackgoai.com.svg)](https://agenstry.com/agents/api.stackgoai.com)
[![Verified Business](https://agenstry.com/badge/api.stackgoai.com/identity.svg)](https://agenstry.com/agents/api.stackgoai.com)
[![Uptime](https://agenstry.com/badge/api.stackgoai.com/uptime.svg)](https://agenstry.com/agents/api.stackgoai.com)
[![A2A version](https://agenstry.com/badge/api.stackgoai.com/protocol.svg)](https://agenstry.com/agents/api.stackgoai.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

{
  "_source": "agentic.market",
  "service": {
    "id": "api-stackgoai-com",
    "name": "api.stackgoai.com",
    "description": "",
    "domain": "api.stackgoai.com",
    "provider": "api.stackgoai.com",
    "providerUrl": "",
    "category": "",
    "networks": [
      "Base"
    ],
    "enriched": false,
    "endpoints": [
      {
        "url": "https://api.stackgoai.com/api/v1/extract-contact",
        "description": "Extract structured public business contact information from any public business website. Returns company name, emails, phone numbers, social profiles, postal addresses, and contact pages as structured JSON. $0.05 per request via x402 on Base.",
        "pricing": {
          "amount": "0.05",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "POST",
        "providerName": "",
        "parameters": [
          {
            "group": "body",
            "name": "url",
            "type": "string",
            "description": "",
            "example": "https://example.com",
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "",
        "tags": [],
        "quality": {
          "l30DaysTotalCalls": "1",
          "l30DaysUniquePayers": "1"
        }
      }
    ],
    "integrationType": "",
    "isNew": false,
    "priceSummary": {
      "minAmount": "0.05",
      "maxAmount": "0.05",
      "avgCostPerTransaction": "0.05",
      "avgCostBasis": "exact",
      "currency": "USDC"
    },
    "serviceName": "",
    "tags": [],
    "iconUrl": ""
  }
}

Activity (audit trail)

Endpoints

Health · last 0 probes

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Audit-grade evidence bundle

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