# NetIntel Currency Exchange History > NetIntel Currency Exchange History is a paid API for AI agents from netintel.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14). Returns a daily historical exchange-rate series for any fiat or crypto currency pair, with min/max/average/change/volatility stats, over a configurable date range. ## Facts - Endpoint: GET https://netintel.dev/currency-exchange/history - Price: $0.02/call - Payment: x402 - Status: unknown - Last checked: 2026-09-14 - Activations on Zero: 0 - Tags: x402 - Canonical page: https://www.zero.xyz/c/netintel-currency-exchange-history-af201453 - Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__yFNjYp0IFBJTq0fvybEQ Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently. ## How to call it through Zero Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`): ```sh zero fetch --capability netintel-currency-exchange-history-af201453 ``` Example prompt: Pull the daily USD to EUR exchange rate history for the last 60 days and give me the min, max, average, and how much the rate changed over the period. ## When to prefer this Choose this endpoint when you need historical daily exchange rate data over a date range — for trend analysis, repricing context, volatility assessment, or min/max/average stats — rather than a single spot conversion. It covers both fiat pairs (via ECB reference rates) and crypto pairs (via Coinbase daily closes) with no API key required. Prefer the sibling /currency-exchange/convert endpoint for a single current spot rate. ## Known failure modes - Missing required 'from' or 'to' query parameters returns a 400 error - Unsupported or misspelled currency code returns an error or empty series - Date range exceeding caps (ECB fiat 366d, other fiat 90d, crypto 300d) may return truncated data or an error - Future end dates return data only up to the latest available close - Weekend/holiday gaps in fiat ECB data may reduce point count below expected days - Stale flag set to true if cached data is older than expected refresh cycle ## How this service works Daily historical exchange-rate series for any currency pair — fiat via ECB reference data, crypto via Coinbase daily closes — with min/max/average/change stats, no API key. Pass start/end dates or a days lookback (default 30). The history sibling of /currency-exchange/convert: trend and repricing context for the pairs agents already quote spot. ## Output Returns a JSON object containing the currency pair (from/to), date range (start/end), a series array of {date, rate} objects with one entry per calendar day data was available, aggregate stats (min, max, average, change_pct, volatility_pct), the data source used (frankfurter, ecb-xml, currency-api, or coinbase), point count, cache age in seconds, and a stale flag. The rate field represents units of the target currency per 1 unit of the base currency on each date. ## Request schema (JSON Schema) ```json { "type": "object", "$schema": "https://json-schema.org/draft/2020-12/schema", "required": [ "input" ], "properties": { "input": { "type": "object", "required": [ "type", "method" ], "properties": { "type": { "type": "string", "const": "http" }, "method": { "enum": [ "GET" ], "type": "string" }, "queryParams": { "type": "object", "required": [ "from", "to" ], "properties": { "to": { "type": "string", "description": "One target code, e.g. EUR or BTC. Aliases: target, quote" }, "end": { "type": "string", "description": "Range end, YYYY-MM-DD; default today. Alias: to_date" }, "days": { "type": "number", "description": "Alternative to start/end: lookback window ending today; default 30. Alias: period" }, "from": { "type": "string", "description": "Base currency: ISO 4217 fiat code or crypto ticker, e.g. USD or BTC. Aliases: base, source" }, "start": { "type": "string", "description": "Range start, YYYY-MM-DD. Alias: from_date. Caps: ECB fiat 366d, other fiat 90d, crypto 300d" } } } }, "additionalProperties": false }, "output": { "type": "object", "required": [ "type" ], "properties": { "type": { "type": "string" }, "example": { "type": "object", "properties": { "to": { "type": "string" }, "end": { "type": "string" }, "from": { "type": "string" }, "stale": { "type": "boolean" }, "start": { "type": "string" }, "stats": { "type": "object", "properties": { "max": { "type": "number" }, "min": { "type": "number" }, "average": { "type": "number" }, "change_pct": { "type": "number", "description": "first→last point, %" }, "volatility_pct": { "type": "number", "description": "stdev of daily % changes" } } }, "series": { "type": "array", "items": { "type": "object", "properties": { "date": { "type": "string" }, "rate": { "type": "number", "description": "units of `to` per 1 `from` on that date" } … (truncated) ``` ## Response schema (JSON Schema) ```json { "type": "json", "example": { "to": "EUR", "end": "2026-08-01", "from": "USD", "stale": false, "start": "2026-07-26", "stats": { "max": 0.87974, "min": 0.8707, "average": 0.87626, "change_pct": -0.94, "volatility_pct": 0.34 }, "series": [ { "date": "2026-07-24", "rate": 0.87897 }, { "date": "2026-07-27", "rate": 0.87804 }, { "date": "2026-07-28", "rate": 0.87974 }, { "date": "2026-07-29", "rate": 0.87873 }, { "date": "2026-07-30", "rate": 0.87138 }, { "date": "2026-07-31", "rate": 0.8707 } ], "source": "frankfurter", "findings": [ { "rule": "non_trading_days_omitted", "detail": "ECB publishes business days only — weekends and holidays have no reference rate and are omitted, never interpolated" } ], "point_count": 6, "cache_age_seconds": 0 } } ``` ## More - Live health (JSON, refreshed every minute): https://www.zero.xyz/c/netintel-currency-exchange-history-af201453/health.json - [Zero catalog index](https://www.zero.xyz/llms.txt) - [Other services from netintel.dev](https://www.zero.xyz/host/netintel.dev/llms.txt)