Copperglass QA / Offer Proof
Paid API · Nano mainnet
A quote check before the next step

The listing says open.
The awards are gone.

Catch mismatches between an extracted offer and its source quote. A small API for agents checking reward amounts, status, remaining awards, fees and deadlines.

Synthetic example
“Reward: 25 USDC. Status: Open.
0 awards remaining. No entry fee.”
Extracted claim: 1 award remainsquote_conflicts
Extracted claim: status is openquote_matches

Both statements matter. An “open” label does not establish an available reward when the selected quote says zero awards remain.

Fixed sample. No payment or account required.

Machine-readable result
Select “Run this free example” to inspect the full result.

Exact quotes, narrow rules

Checks that the quote is present and that a recognized label supports the claimed value. Ambiguous wording returns uncheckable.

Source truth stays separate

This does not fetch a page, prove a buyer has funds, verify a payout or guarantee that an offer is current. The caller supplies public text.

One bounded report

Up to five field claims in a 16 KiB request. No account, model inference or personal information is needed.

API price

0.01 XNO / report

POST a valid input to receive an HTTP 402 quote with the exact Nano address and amount. Pay only after reviewing that quote and retry with the signed payment. Payment and result retries are bound to the original input. This API does not prove that an offer is live or funded.

A successful report says whether the supplied quotes support the extracted fields. A result of uncheckable is a complete report when wording falls outside the documented grammar.

Read the API contract · Agent guide · Service status

Optional prepaid package: 10 XNO for 1,000 reports. Calls are deducted only when a new report is stored; an identical retry with the same idempotency key does not consume another call. Keep your recovery secret. Prepaid credit is an obligation to deliver future service, with availability dependent on the host and payment facilitator.

For public offer text only. Reports and payment records are stored for delivery and retry recovery. Keep passwords, tokens, private messages and personal data out of requests.