x402 census · vibesprings.net · dcf0f4e31b00 · JSON

GET /api/exchange/history

live

Historical foreign exchange (Forex) time-series database. Retrieve daily historical rates for any currency pair over a custom date range up to 365 days. Automatically computes complete summary statistics including minimum rate, maximum rate, time-weighted average rate, opening/closing rates, and total percentage change.

Verdict: live. The unpaid GET reached a valid 402. The live amount equals the catalog price.

Facts from the catalogs

Field Value

URL https://vibesprings.net/api/exchange/history

Method GET

Price $0.005 USDC = 5000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Network eip155:8453 (base)

payTo 0x38C063312719220c676E988f0DEE14B4ec0e44C8

Seller vibesprings.net

Catalogs cdp (row updated 2026-10-23)

Listed since (lower bound) 2026-10-23 (earliest catalog timestamp; catalogs report last-update times only)

Last catalog update 2026-10-23

CDP quality counters 2 calls and 2 unique payers in 30 days, last call 2026-10-23 (catalog-reported, not verified on chain)

Category (keyword rule) finance/macro

Templated path no

x402Version in catalog 2

Service name / tags Vibe Springs · currency, forex, time-series, historical, exchange-rates

Unpaid probe (census of 2026-10-25)

Field Value

Probed at 2026-10-25T21:16:05.165Z

HEAD 402

GET 402

Verdict live live: valid 402 to an unpaid GET

402 carried in header

x402Version in the 402 2

accepts[0] {"scheme":"exact","network":"eip155:8453","amount":"5000","payTo":"0x38C063312719220c676E988f0DEE14B4ec0e44C8","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","maxTimeoutSeconds":300,"extra":{"name":"USD Coin","version":"2"}}

Live amount equals catalog price yes

Live payTo equals catalog payTo yes

extensions.bazaar in the 402 yes

PAYMENT-REQUIRED header yes

WWW-Authenticate offer none

Content type / server / CORS application/json / hcdn / none

Latency 246 ms

Error Payment required

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 118

Payments 809

USDC volume $4.28

Median payment $0.002

First / last payment 2026-06-15 / 2026-09-28

Sampler-shaped share of payments 100.0%

Payers that are not samplers 0

Source forensics-2026-09-30

Address 0x38C063312719220c676E988f0DEE14B4ec0e44C8

Declared input and output (extensions.bazaar)

{
 "input": {
  "method": "GET",
  "queryParams": {
   "base": "USD",
   "end": "2024-12-31",
   "start": "2024-01-01",
   "to": "EUR"
  },
  "type": "http"
 },
 "output": {
  "type": "json",
  "example": {
   "base": "USD",
   "period": {
    "end": "2024-12-31",
    "start": "2024-01-01",
    "tradingDays": 252
   },
   "summary": {
    "avg": 0.9215,
    "changePercent": -1.23,
    "max": 0.9432,
    "min": 0.8975
   },
   "target": "EUR",
   "timeSeries": [
    {
     "date": "2024-01-02",
     "rate": 0.9185
    }
   ]
  }
 }
}

Try it (unpaid: shows the 402)

curl -si -X GET 'https://vibesprings.net/api/exchange/history' -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/dcf0f4e31b00/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"dcf0f4e31b00"} 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 vibesprings.net.