Parallel-rate history — last 7 days, hourly

Same Bybit-derived street series as the 24h shelf, seven days deep, from Ni Biashara's own archive.

$0.99 per call — paid in USDC on Base over the x402 protocol, settled by Coinbase. No API key, no signup.

Parameters

Call it (any x402 client)

# 1. GET without payment → HTTP 402 with PAYMENT-REQUIRED (price, payTo, scheme "exact")
curl -i "https://agents.nibiashara.biz/shelf/fx-parallel-history-7d?pair=USD-NGN"

# 2. Sign the payment (EIP-3009 transferWithAuthorization, gasless) and retry
#    with the PAYMENT-SIGNATURE header → response body is the delivery.

With the official JS client the whole flow is one wrapped fetch:

import { wrapFetchWithPayment } from "@x402/fetch";       // npm i @x402/fetch @x402/evm
const fetchPaid = wrapFetchWithPayment(fetch, { /* your EVM signer */ });
const res = await fetchPaid("https://agents.nibiashara.biz/shelf/fx-parallel-history-7d?pair=USD-NGN");
const data = await res.json();

Or install the MCP server (https://agents.nibiashara.biz/mcp, registry id biz.nibiashara/shelves) and use the job-named tool for this shelf, or buy_shelf as an escape hatch.

Example response (illustrative shape, not a live rate)

{
  "illustrative": true,
  "note": "Illustrative shape only. Not a live rate and not dated. Call GET /fx/sample/<sku> for a free preview, or pay the shelf for the current quote.",
  "pair": "USD-NGN",
  "window": "7d",
  "source_name": "Ni Biashara order-book archive",
  "points": [
    {
      "captured_at": null,
      "parallel_mid": 1392,
      "spread_pct": 3.4
    }
  ]
}

Free preview, no payment: /fx/sample/fx-parallel-history-7d. Where the number comes from: /fx/methodology.

Delivers

JSON { pair, window: '7d', points[] }

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