Ask any page. Get the verified answer.

Your agent needs one fact from a page. Fetching the page costs it 50,000 tokens of HTML; the fact is a sentence. The gateway above reads the page for the agent — try it: the third example chip shows what happens when a page can't answer.

The guarantee

Grounding here is an engineering property, not a model behavior. A deterministic verifier checks that every excerpt is a character-for-character span of the fetched page and that the composed answer stays inside what the excerpts support — including negation. If verification fails twice, you get not_found, never a guess. A 40-case golden set gates every deploy: 100% grounded, zero fabrications. Read the grounding report — the harness is one command anyone can run.

Call it from code

curl -X POST https://botvisibility.com/api/answer \
  -H "Content-Type: application/json" \
  -d '{"url": "https://stripe.com/docs/webhooks",
       "question": "how many times are failed webhook deliveries retried?"}'

Every IP gets five answered questions a day to evaluate — no key needed. Only answered responses count; not_found, already_efficient, unreachable, and payment_required are always free, on every tier.

Pricing

The billing rule is enforced on-chain, not promised: the paid route returns HTTP 200 only for answered, and an x402 settlement completes only on 200. A question the source can't answer costs you nothing — you still get the full result body.

Pay per answer (agents)

# x402: the gateway quotes $0.01 USDC, your wallet pays, the answer returns.
curl -X POST https://pay.botvisibility.com/api/v1/answer-gateway \
  -H "Content-Type: application/json" \
  -d '{"url": "https://stripe.com/docs/webhooks",
       "question": "how many times are failed webhook deliveries retried?"}'
# (any x402 client — pay.sh CLI, x402-fetch, Pay — handles the 402 → pay → retry)

Prepaid key (developers)

# $5.00 once → a key with 1,000 answers. Then it's a normal Bearer key.
curl -X POST https://pay.botvisibility.com/api/v1/answer-keys
# → { "api_key": "bvag_…", "credits": 1000 }

curl -X POST https://botvisibility.com/api/answer \
  -H "Authorization: Bearer bvag_…" \
  -H "Content-Type: application/json" \
  -d '{"url": "…", "question": "…"}'

Every response carries a receipt

You can audit every call: what the page would have cost raw, what was delivered, what you saved, what you paid — and, on a paid web, what the source itself charged (source_cost_usd).

{
  "state": "answered",
  "answer": "Failed deliveries are retried up to 5 times with exponential backoff.",
  "confidence": "high",
  "excerpts": [{ "lines": "112", "text": "retried up to 5 times with exponential backoff" }],
  "receipt": {
    "raw_tokens_at_source": 48210,
    "tokens_delivered": 61,
    "reduction": "99.9%",
    "est_tax_avoided_usd": 0.0481,
    "fee_usd": 0.01,
    "source_cost_usd": 0,
    "route": "html_distill",
    "cache": "miss"
  }
}

Those receipts, aggregated, are the Agent Tax Index — the public record of what the web costs agents to read.

Compliance, built in

The gateway honors robots.txt and no-AI signals (X-Robots-Tag, Content-Signals) before any fetch, identifies itself with a stable user-agent, caps every request at three fetches, and treats an HTTP 402 from a source as a price, not a wall. Full API details in the docs.