Currency Converter (ECB)

x402 resource x402 REST

api.stablecoingateways.com · api.stablecoingateways.com · Other services

Provider site ↗ How sources are measured

Currency converter (ECB reference rates): convert an amount from one currency to one or more others, e.g. 250 USD to EUR, GBP and JPY, at the latest European Central Bank rate or any day in the last 90 days. Returns the rate, converted amount and rate date for each target. 30 currencies. Reference r

Price per call 0.001 USDC per call published unit: per call

Calls · 30d 5 counted by the source, no daily split

Payers · 30d 4 distinct paying addresses seen by the source

Observed inflows · 30d — not attributable

Inflow growth · 7d — not comparable (baseline under $1 or window incomplete)

Payment evidence Attribution blocked confidence: low · read 2026-10-29

Where you can pay

4 routes from the provider's payment requirements

Payment networks and amounts published for Currency Converter (ECB).
Network	Scheme	Amount	Asset
Base	exact	0.001	USDC
Base Sepolia	exact	—	—
xrpl:0	exact	—	—
xrpl:1	exact	—	—

“exact” is the price per call. “upto” is a ceiling the client sets, not a price. Atomic amount 1000 = 0.001 USDC per call on Base. 4 payment options published.

What you can call

access: payment per call (x402)

endpoint https://api.stablecoingateways.com/v1/fx/convert

Request

{
    "method": "GET",
    "queryParams": {
        "amount": "250",
        "from": "USD",
        "to": "EUR,GBP,JPY"
    },
    "type": "http"
}

Response

{
    "example": {
        "data": {
            "amount": 250,
            "conversions": {
                "EUR": {
                    "amount": 223.353883,
                    "rate": 0.89341553
                },
                "GBP": {
                    "amount": 187.009738,
                    "rate": 0.74803895
                },
                "JPY": {
                    "amount": 39200.83981,
                    "rate": 156.80335924
                }
            },
            "cross_rates_derived": true,
            "from": "USD",
            "note": "ECB reference rates are for information only and are not transaction rates.",
            "provenance": {
                "data_timestamp": "2026-10-24T08:00:15.145Z",
                "evidence_only": true,
                "facts": [
                    {
                        "fact": "Our copy of the ECB euro foreign exchange reference rates holds a r...",
                        "id": "fx.ecb_reference_rates",
                        "limits": [
                            "ECB reference rates are published once per work..."
                        ],
                        "retrieved_at": "2026-10-24T08:00:15.145Z",
                        "source": "European Central Bank euro foreign exchange reference rates (eurofx...",
                        "source_as_of": "2026-10-23",
                        "source_url": "https://www.ecb.europa.eu/stats/eurofxref/eurofxref-hist-90d.xml"
                    }
                ],
                "schema": "sg-provenance/1"
            },
            "rate_date": "2026-10-23",
            "requested_date": null,
            "source": "European Central Bank euro foreign exchange reference rates. Source: ECB. This informat...",
            "window": [
                "2026-07-27"
            ]
        },
        "receipt": {
            "endpoint_id": "fx-convert-v1",
            "evidence": {
                "data_timestamp": "2026-10-24T09:00:00Z",
                "provenance_hash": "<sha256>",
                "service_version": "<version>",
                "terms_hash": "<sha256>",
                "terms_version": "<label>",
                "validation": "input=pass;freshness=pass;output=pass;provenance=pass"
            },
            "log_seq": 1,
            "price": {
                "amount": "1000",
                "asset": "USDC",
                "network": "eip155:84532"
            },
            "request_hash": "hex",
            "response_hash": "hex",
            "sig": "hex",
            "ts": "2026-10-22T09:00:00Z",
            "tx_hash": "0x..",
            "v": 1
        }
    },
    "type": "json"
}

Examples are the provider's own, not a call we made.

Observed inflows · last 30 days

No inflow observed in this window

The payout address is also published by 13 other service(s); the volume cannot be attributed to one of them.

Observed inflows by window for Currency Converter (ECB).
Window	Observed	Transfers
Last complete day (2026-10-28)	—	—
Last 7 days	—	—
Last 30 days	—	—
Growth, 7d against the 7 before	not comparable

Source: on-chain transfer scan (USDC on Base) Window: 2026-09-29 → 2026-10-28 Scanned: 30/30 days Sample: 0 days with a transfer First seen: never Last update: 2026-10-28

Daily history → · what a transfer does and does not prove

Opportunity insights

2 findings from measured data

Payment attribution is blocked

The payout address is shared with 13 other service(s). That is normal for facilitator and platform addresses, and it is why this profile shows no inflow figure. The volume exists — it just cannot be split without inventing a rule.
How attribution works →
Category benchmark

76 of 15,502 services (0.5%) in Other services have attributable inflows; 2,094 have a source-measured call count. Median measured calls: 2.
Rank this category by observed inflows →

What the provider says

Quoted from x402 Bazaar · source record · read 2026-10-29

Facts and where they come from

Price: 0.001 USDC per call Provider claim
Recorded value: 0.001 USDC per call.
Unit: per call
Protocol: x402, REST · transport: HTTP Provider claim
Auth: x402
Endpoint: https://api.stablecoingateways.com/v1/fx/convert
Source: x402 Bazaar (Coinbase CDP) · Public discovery API (provider-published records)
Last checked: Not checked by us yet — the data is as the source published it
First seen: 2026-10-24
Usage: 5 calls · 4 unique payers in the 30 days before 2026-10-26. Measured by the x402 Bazaar, not by us and not by the provider.

Money, and what it actually proves

Verified revenue · 30d Unknown

Observed inflows · 30d —

Attribution Shared

Receipt ledger Not connected

Attribution blocked · confidence low
The payout address is also published by 13 other service(s); the volume cannot be attributed to one of them.

Why revenue is “unknown”. A revenue figure needs a receipt: an amount a buyer actually paid for this service. We hold none for this entry, and we hold no funds at all. What we have instead is an activity value of $0.01 — the source's call count multiplied by the published price. That is what the list price implies, not what anyone paid. The payout address is also published by 13 other service(s); the volume cannot be attributed to one of them.

Daily market statistics — the ledger view, day by day

No daily history has been archived for this service yet. Open the full daily history →

Payment rails

Base Sepolia · exact · asset unresolved

0x3177FA489523ddF60f293898f7Ee5912576f3d9b

raw amount 1000 (unit unresolved)

From source record

Base · exact · USDC

0x39BF4378b74f9E19c5113b00b01f57d94537bad1

0.001 USDC

From source record

xrpl:0 · exact · asset unresolved

r3BsahzSMtF4HiJuL8HMf1se6T1JtMB6hg

raw amount 793 (unit unresolved)

From source record

xrpl:1 · exact · asset unresolved

rDbkEYdqLHcnWAHAVFwhH6KM6puCPbXNgs

raw amount 793 (unit unresolved)

From source record

A payment rail is where the provider asks to be paid. It is not proof that anything was paid through it. See evidence levels.

Provenance

One row per statement. “Verified” means we checked it ourselves and the finding is quoted. “Provider claim” means we read it in the provider's own record. “Not found” is a statement about our search, not proof of absence.

Statement	Status	What we found	Source	Checked
Endpoint	Provider claim	https://api.stablecoingateways.com/v1/fx/convert Evidence Als Resource-URL im Bazaar-Eintrag geführt.	api.cdp.coinbase.com	2026-10-29
Input output	Provider claim	Request/response examples published with the listing Evidence Beispiel-Ein- und -Ausgabe stammen aus dem Bazaar-Eintrag des Anbieters.	api.cdp.coinbase.com	2026-10-29
Payment	Provider claim	4 rails: Base, xrpl:0, Base Sepolia, xrpl:1 · payee 0x39BF4378b74f9E19c5113b00b01f57d94537bad1 Evidence Aus den `accepts`-Einträgen: Netzwerk, Asset, Empfängeradresse und Betrag. Die Adresse ist die Grundlage der späteren On-Chain-Zuordnung; sie ist noch nicht durch eine eigene 402-Antwort bestätigt.	api.cdp.coinbase.com	2026-10-29
Pricing	Provider claim	0.001 USDC per call Evidence Atomic amount 1000 = 0.001 USDC per call on Base. 4 payment options published. Netzwerk: Base, xrpl:0, Base Sepolia, xrpl:1.	api.cdp.coinbase.com	2026-10-29
Protocol	Provider claim	x402 (HTTP 402 payment challenge) Evidence Im x402 Bazaar als zahlungspflichtige HTTP-Ressource gelistet (x402Version 2, Typ http).	api.cdp.coinbase.com	2026-10-29
Provider	Provider claim	api.stablecoingateways.com Evidence Die Ressource wird unter diesem Host im x402 Bazaar geführt; die Angaben stammen vom Anbieter.	api.cdp.coinbase.com	2026-10-29
Usage	Verified	5 calls / 4 unique payers in the last 30 days Evidence Source-reported usage from Coinbase x402 Bazaar, read on 2026-10-29. Letzter Aufruf laut Quelle: 2026-10-26T14:58:35.424Z. Aufrufe sind kein Umsatz.	api.cdp.coinbase.com	2026-10-29

Endpoint checks

We have not called this endpoint yet. Until we do, everything above is what the source published — no more.

Price

0.001 USDC per call

price checked 2026-10-29 Open at api.stablecoingateways.com

You buy from the provider, not from us. This page takes no payment, holds no funds and stores no wallet keys.

Save

Kept in this browser session — no account needed.

Favourites are kept on this site only.

Competitors & category benchmark

Rank the whole category →

Closest competitors Other services

Send native 14,616 calls · 0.05 USDC per call —
Submit 3,515 calls · 0.002 USDC per call —
Hash 503 calls · 0.002 USDC per call —
Horror Story API 467 calls · 0.01 USDC per call $4.61
Gas now 441 calls · 0.001 USDC per call —

Sorted by source-measured calls, not by our opinion. The right-hand figure is observed inflow, which stays empty for peers whose address is shared.

Category benchmark 15,502 services in this category

With a measured call count	2,094 (13.5 %)
With a published price	3,440 (22.2 %)
With attributable inflows	76 (0.5 %)
Observed inflows · 30d	$99.24
Median measured calls	2
Median price per call	$0.01

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Chosen by category and by whether we have measured them, not by who pays us. A sponsored placement in this list is labelled as such.

Where you can pay

What you can call

Request

Response

Observed inflows · last 30 days

Opportunity insights

Payment attribution is blocked

Category benchmark

What the provider says

Facts and where they come from

Money, and what it actually proves

Payment rails

Provenance

Endpoint checks

Tags

Competitors & category benchmark

Similar services

Send native x402 REST usage

Submit x402 REST usage

Hash x402 REST usage

Horror Story API x402 REST usage