Heron measures how visible a website is to AI search engines (ChatGPT, Claude, Perplexity, Gemini, Google AI Overviews) and returns a structured improvement plan. The x402 endpoint quotes a per-audit price in USDC on Base; agents pay and receive a machine-readable report. Name-your-price above a transparent floor is supported at /agent/quote. Free instant score at POST /api/audit; manifest at /.well-known/agent.json.
Pay from $0.250454 per request in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.
listed 2026-07-02 · no on-chain settlement recorded yet
ASSESSMENT
updated 4h agoEvidence-backed signals, not a single score. Click any chip for the proof. Measured values stay read-only; unknown is honest.
reliability 2.4%
- uptime 24h
- 0%
- uptime 7d
- 0%
- uptime 30d
- 2.4%
- uptime 90d
- 38%
- response p95
- 1471ms
- avg response
- 883ms
- total checks
- 1,945
Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.
compliance A (12/13): declares the current x402 version (2), stale (probe failing)
12 of 13 x402 conformance checks pass; failing: declares the current x402 version (2). Full checklist below.
price $0.250454 (p82 in AI)
- price (min)
- $0.250454
- category percentile (min)
- p82 in AI
- endpoints / prices
- 1 / 1
- model
- flat
- stability
- 0%
risk clean
No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.
- domain age
- -
- registrar
- -
- hosting
- custom
- domain created
- ---
Identity facts, not a risk score.
traction $0.00 30d · 0 buyers
- volume 30d
- $0.00
- buyers 30d
- 0
- settlements 30d
- 0
- first settlement
- ---
- last settlement
- ---
- top buyer share
- -
- trend 7d vs 30d
- -
- networks
- eip155:8453
- volume all-time
- $0
- settlements all-time
- 0
- median settlement 30d
- -
- max settlement 30d
- -
- settled via
- -
Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.
Top buyer share is a concentration signal, not part of the ranking score.
WHAT IT DOES
ai-derivedProvides AI-powered website auditing and visibility reports
- category
- website-audit
- in
- query params
AI-generated summary. The measured data is never altered by it.
ENDPOINTS
| METHOD | PATH | DESCRIPTION | PRICE | NETWORK | ASSET | 402 CHANNEL |
|---|---|---|---|---|---|---|
| GET | /agent/audit?url=https://example.com | Heron AI-visibility (GEO) full report | $0.250454 | Base | USDC | - |
REQUEST / RESPONSE EXAMPLE
An unpaid request to GET /agent/audit?url=https://example.com returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.
curl -i 'https://heronapp.io/agent/audit?url=https://example.com'
// 402 response (captured by monitor) · 1 payload · click to expand
[
{
"x402": {
"asset": "USDC",
"order": 1454,
"retry": "/agent/audit?url=https://example.com&order=1454",
"amount": 0.250454,
"pay_to": "0xB62e1c338a83D3a6621f9127eEa5B000caCfCd01",
"scheme": "exact",
"network": "base",
"asset_contract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bDA02913"
},
"error": "Payment required. Pay the USDC amount on Base, then retry with ?order to collect the report.",
"human": "Send 0.250454 USDC on Base to 0xB62e1c338a83D3a6621f9127eEa5B000caCfCd01, then GET /agent/audit?url=...&order=1454",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bDA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xB62e1c338a83D3a6621f9127eEa5B000caCfCd01",
"scheme": "exact",
"network": "base",
"mimeType": "application/json",
"resource": "https://heronapp.io/agent/audit?url=https://example.com",
"description": "Heron AI-visibility (GEO) full report",
"maxAmountRequired": "250454",
"maxTimeoutSeconds": 600
}
],
"x402Version": 1
}
] OVER TIME
All charts use the 7d selector; each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/heron/price, /scores, /volume and /buyers. On-chain volume and distinct buyers are measured over the service's settlement address and are a conservative undercount (only settlements that reach a measured facilitator are counted). The on-chain series roll up hourly, so the latest day can be up to about an hour behind; distinct buyers are counted per payout address, so a service that settles to more than one address is an upper bound.
checklist grew 11->14 on 2026-07-28; a step here is a metric change, not a regression
Measured site and economics pillars from the assessment history, so the latest value shown elsewhere on this page reads as a point on a trend rather than a permanent state.
COMPLIANCE
12/13 checks pass · grade A · failing: declares the current x402 version (2) · stale (probe failing)last 402 captured 2026-07-15 · last up 2026-07-15
- 402 payload captured
- accepts[] array present
- payTo address recoverable
- payTo at accepts[0].payTo (conformant shape)
- payTo is a valid on-chain address
- atomic price declared
- atomic price in a sane range
- asset (token) address declared
- network resolves to CAIP-2
- payment scheme declared
- served over HTTPS
- declares the current x402 version (2)
- EIP-712 domain parameters present on every EVM entry
- x402 v2 envelope delivered in the payment-required header
SITE PILLARS
- homepage reachable
- openapi doc
- pricing page
- llms.txt
- robots.txt
- terms page
recent checks (18) live · click to expand
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