currency-api-production-4a8d.up.railway.app
- This looks like crypto price data, which is available free from Coinbase or the chain, free. A paid call buys packaging or convenience, not exclusive data, so confirm you need it before paying.
- 2 conclusive result(s) came from calls with no settled payment (free tier or failed settlement); informative, but not paid verification.
- 2 recorded attempt(s), but none settled a payment with a conclusive result, so delivery is unverified. Absence of a grade is not a bad grade.
Grades
No purchase-based grade yet. Everything below was measured, by paying this seller or by sweeping the chain, and none of it is editorial.
Accuracy against a primary source
- accurate Crypto price (BTC/USD): returned 64264.0, off by -0.9 bps against Coinbase/Kraken median · $0.001/call
Measured 2026-08-17 by paying this seller and comparing the number it returned with a source it cannot resell. A dated sample, not a live guarantee. Full corpus at /categories.
Did it deliver what it promised?
1 of 1 endpoint we paid returned everything their own published schema promised.
- delivered returned all 8 promised fields
/crypto/price· 2,230msReal response shape
{ "query": "string", "coin_id": "string", "vs_currency": "string", "price": "integer", "market_cap": "number", "change_24h_pct": "number", "cached": "boolean", "source": "string" }Types only, verified from a real paid call. Values discarded.
This is a paid delivery check: we called the endpoint with its own advertised input and compared the response against its own advertised output. It is the one thing free probing cannot see.
Verifiable receipts
2 paid calls to this host are recorded as tamper-evident receipts, all delivered or graded accurate. Each can be re-verified independently, from the archived bytes up.
wab_663d2f4b5a6e2aaccurrency-api-production-4a8d.up.railway.app
Promised 8 fields for $0.001, paid, and returned all 8.
Evidence and how to verify it yourself
The real response shape, types only, values discarded:
{
"cached": "boolean",
"change_24h_pct": "number",
"coin_id": "string",
"market_cap": "number",
"price": "integer",
"query": "string",
"source": "string",
"vs_currency": "string"
}Three independent checks, none needing trust in this site: integrity recomputes the id as a hash of the evidence, so any edit shows; verdict re-derives the result offline; raw re-reads the untouched bytes archived at pay time and reproduces the shape.
python3 receipts.py --verify wab_663d2f4b5a6e2aacwab_8f4d849f4ddda0c6currency-api-production-4a8d.up.railway.app
Asked for BTC/USD spot price; returned 64264.0, within ±100 bps of 64269.8475 from Coinbase/Kraken median.
Evidence and how to verify it yourself
Graded against a source that cannot be a reseller: Coinbase/Kraken median. Returned 64264.0 versus a truth of 64269.8475.
Three independent checks, none needing trust in this site: integrity recomputes the id as a hash of the evidence, so any edit shows; verdict re-derives the result offline; raw re-reads the untouched bytes archived at pay time and reproduces the shape.
python3 receipts.py --verify wab_8f4d849f4ddda0c6The full record and the format are at /receipts.
What it sells
1 endpoint listed, priced $0.0010, settling on Base.
$0.0010Current price, market cap, and 24h change for a single cryptocurrency by symbol or name (CoinGecko).
Grades here come from paying this service and recording what happened, or from calling it where it is free. Settlement figures are swept daily from Base USDC Transfer logs. Nothing on this page is sponsored.