x402 census · 4yearcycle.com · 3a33fe26c0fa · JSON
GET /x402/fx-rates
unprobed
Official daily foreign exchange reference rates from the European Central Bank (~30 currencies vs EUR, published each business day around 16:00 CET), rebased on request to any listed currency via EUR cross-rates and filtered to a requested symbol list; returns the reference date, the rate table and the ECB source attribution.
Verdict: not verified by an unpaid GET. not probed yet. This says nothing about whether the route works when called as declared.
Facts from the catalogs
| Field | Value |
|---|---|
| URL | https://4yearcycle.com/x402/fx-rates |
| Method | GET |
| Price | $0.005 USDC = 5000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 |
| Network | eip155:8453 (base) |
| payTo | 0x9862ca83b72aB95521F457aFf6e6EFb03d8164C3 |
| Seller | 4yearcycle.com |
| Catalogs | cdp (row updated 2026-09-30) |
| Listed since (lower bound) | 2026-09-30 (earliest catalog timestamp; catalogs report last-update times only) |
| Last catalog update | 2026-09-30 |
| CDP quality counters | 4 calls and 4 unique payers in 30 days, last call 2026-09-30 (catalog-reported, not verified on chain) |
| Category (keyword rule) | finance/macro |
| Templated path | no |
| x402Version in catalog | 2 |
| Service name / tags | ECB FX Rates · fx, forex, exchange-rates, currencies, ecb |
Unpaid probe (census of )
| Field | Value |
|---|---|
| Probe | not probed in this build |
No hourly re-probe has reached this resource yet; the cron covers a rotating slice of 150 per hour.
On-chain facts for the payTo (public address)
| Field | Value |
|---|---|
| Distinct payers | 4 |
| Payments | 4 |
| USDC volume | $0.06 |
| Median payment | $0.01 |
| First / last payment | 2026-08-24 / 2026-09-17 |
| Sampler-shaped share of payments | 100.0% |
| Payers that are not samplers | 0 |
| Source | forensics-2026-09-30 |
| Address | 0x9862ca83b72aB95521F457aFf6e6EFb03d8164C3 |
Declared input and output (extensions.bazaar)
{
"input": {
"method": "GET",
"queryParams": {
"base": "USD",
"symbols": "EUR,GBP,JPY,CHF"
},
"type": "http"
},
"output": {
"type": "json",
"example": {
"base": "USD",
"date": "2026-08-17",
"notice": "ECB euro foreign exchange reference rates, available free of charge at ecb.europa.eu; non-EUR bases are cross-rates computed via EUR.",
"rates": {
"CHF": 0.809885,
"EUR": 0.862589,
"GBP": 0.737514,
"JPY": 159.225395
},
"source": "ECB"
}
}
}
Try it (unpaid: shows the 402)
curl -si -X GET 'https://4yearcycle.com/x402/fx-rates' -H 'accept: application/json'
The catalog declares GET. A 402 answer carries the payment requirements in the JSON body and, for x402 v2, base64 in the PAYMENT-REQUIRED header. This page never sends a payment.
Paid checks (x402, USDC on Base)
GET https://bazaar.agentexchange.work/r/3a33fe26c0fa/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"3a33fe26c0fa"} places this resource at the top of the report and search pages for 30 days for $1.00, labelled. Unpaid requests answer 402 with the terms. Pricing.
Catalog references: agentic.market (CDP Bazaar front end) · this record as JSON · all resources on 4yearcycle.com.