Get Accurate Internet Computer (ICP) - N/A Prices in Multiple Currencies with this API for backend price aggregation
If you’re building a backend price aggregation service and need to display Internet Computer (ICP) prices in multiple currencies, here’s the key fact up front: Metals-API is purpose-built for precious and industrial metals, not cryptocurrencies. That’s why you’ll see ICP listed here as “N/A.” Still, this article shows how to implement a robust backend price aggregation workflow that correctly identifies unsupported symbols like ICP, prevents bad data from leaking into your app, and leverages Metals-API’s reliable currency baseline, timestamping, and data integrity patterns for metals pricing. You’ll learn how to validate symbols, standardize base currencies, normalize units, manage caching, and fail gracefully—all critical when aggregating prices across providers. We’ll also illustrate techniques you can reuse for any supported metal symbol after you verify it on the Metals-API Supported Symbols page and wire in other providers for ICP specifically.
Why “ICP - N/A” Matters in a Production Price Aggregation Backend
In production, “N/A” is a data quality requirement, not a defect. A backend price aggregator should answer two questions with high confidence:
- Is this symbol supported by the data source?
- If not, how do we surface “N/A” without breaking user experience or downstream analytics?
Metals-API specializes in metals and currency rates. It does not publish cryptocurrency symbols or prices, including Internet Computer (ICP). Rather than forcing a workaround that might silently corrupt data (for example, attempting to map ICP to a metal symbol), your service should correctly detect that ICP is not available from Metals-API, set the value to N/A, and (optionally) fetch ICP from a different, crypto-focused data provider. In other words, you can still build a single backend that aggregates prices from specialized sources while maintaining a consistent schema, timestamping model, and conversion logic.
Main keyword focus: ICP prices across currencies with “N/A” handling
This guide demonstrates:
- Symbol validation and graceful handling for ICP (N/A in Metals-API).
- Using Metals-API’s baseline currency model (USD base) for consistent conversions.
- Implementing time-aware caching, weekend rules, and market-closure logic.
- Applying the same techniques to supported metal symbols (once you verify support in the Metals-API Supported Symbols list).
Supported vs. Unsupported Symbols: The First Line of Defense
Before you fetch any price, verify the symbol. With Metals-API, the right approach is:
- Check the official supported list: Metals-API Supported Symbols.
- If the symbol isn’t present (as with ICP), record the status as N/A.
- Apply a provider routing rule to query an alternative API that specializes in that asset class if needed.
This validation step prevents bad requests, eliminates ambiguous error handling later, and gives you a clean data contract: your aggregator always returns an object with symbol, status, price (if supported), base currency, timestamp, and unit.
Endpoints You’ll Use to Build a Reliable Metals and Currencies Backbone
We will focus on two core endpoints that are highly relevant for a backend aggregator and compatible with “N/A” handling for ICP:
- Latest Rates: the backbone for real-time (or near real-time) rates.
- Time-Series or Historical Rates: the foundation for historical and backfill workflows.
We also reference bid/ask for advanced use cases. For a deeper overview of every endpoint, see the Metals-API Documentation.
Authentication
All requests require an access_key parameter. To get started, visit the Metals-API Website and create your free account to obtain an API key. Keep your API key secret and never commit it to public repos or client-side code.
Designing a Multi-Provider Aggregator That Treats ICP as N/A in Metals-API
Here’s a pragmatic architecture pattern you can adopt:
- Symbol registry: a service or config layer that maps each symbol to a data source. Example:
- Metals-API: metals like gold, silver, platinum, palladium, copper, aluminum, nickel, zinc, etc.
- Crypto provider: cryptocurrencies such as ICP, BTC, ETH, etc.
- Validation layer: checks the provider’s supported symbols before requesting data. For ICP in Metals-API, the validator returns supported=false, value=N/A, and routes elsewhere if needed.
- Normalization layer: all prices standardized to a base currency (USD by default in Metals-API) and a clear unit (e.g., “per troy ounce” for metals). The normalization ensures consumers of your API don’t need to know the origin provider’s quirks.
- Aggregation layer: merges results from different providers into a single response with consistent fields (symbol, base, quote, amount, timestamp, unit, and data_status).
- Caching and retry: to control costs, handle transient network issues, and maintain SLAs.
Latest Rates for the Symbols Your Backend Supports (and N/A for ICP)
Latest rates are ideal for real-time dashboards, live pricing, and just-in-time conversions. Although ICP is unsupported in Metals-API, you can use its latest endpoint for supported metals and currencies, and simultaneously mark ICP as N/A from this source.
Latest Rates: Purpose and Functionality
Purpose: Retrieve the most recent exchange rates relative to a base currency (USD by default). The response includes:
- timestamp: server time for rates freshness
- base: default is USD
- rates: symbol:value pairs where the value is in units per troy ounce for metals when the base is USD
- unit: unit context (e.g., per troy ounce)
Key implementation notes:
- Use this endpoint for metals you actually support in your app.
- For ICP, do not call this endpoint for pricing; return N/A for this provider and route to a crypto data source if your product requires ICP pricing.
- Adopt provider-aware symbols to prevent symbol collisions and confusion across asset classes.
Example: Latest Rates Request (curl)
This example demonstrates structure and fields. Use it for supported metal symbols that your aggregator does serve via Metals-API.
curl -G https://metals-api.com/api/latest \
--data-urlencode "access_key=YOUR_API_KEY" \
--data-urlencode "base=USD" \
--data-urlencode "symbols=XAU,XAG,XPT"
Latest Rates: Example JSON Response
{
"success": true,
"timestamp": 1789949761,
"base": "USD",
"date": "2026-09-21",
"rates": {
"XAU": 0.000482,
"XAG": 0.03815,
"XPT": 0.000912,
"XPD": 0.000744,
"XCU": 0.294118,
"XAL": 0.434783,
"XNI": 0.142857,
"XZN": 0.344828
},
"unit": "per troy ounce"
}
How to Use These Fields in Your Aggregator
- success: quickly check for a successful response before parsing.
- timestamp and date: store these for freshness SLAs and cache invalidation. The timestamp is critical to reconcile with downstream logs and analytics.
- base: confirms USD as the denominator. If you quote prices in EUR, convert your final outputs downstream or adjust the base if your plan allows.
- rates: use only the symbols you requested. For unsupported symbols like ICP, your symbol validation should have prevented a request here; record ICP as N/A for Metals-API.
- unit: standardize your display and calculations. Metals are per troy ounce when base=USD.
Handling ICP in the Latest Rates Flow
Because ICP isn’t a metal and is not supported by Metals-API, a robust aggregator does this:
- Detect ICP is not in the Metals-API Supported Symbols list.
- Return a structured object with data_status="N/A" or data_status="UNSUPPORTED_BY_PROVIDER" for Metals-API.
- Optionally query your crypto provider for ICP, normalize to the same base currency, and merge into your unified response.
Historical and Time-Series: Backfilling, Analytics, and SLAs
When you build price aggregation, historical data underpins charts, PnL, risk models, and SLA audits. Metals-API provides historical and time-series data for supported metals and currencies. You should still apply the same ICP validation logic: if the asset is unsupported, the status remains N/A for this provider.
Historical Rates: Purpose and Functionality
Purpose: Retrieve rates for a specific historical date for supported symbols. Ideal for point-in-time valuation, end-of-day reporting, and data quality checks.
Historical Rates: Example JSON Response
{
"success": true,
"timestamp": 1789863361,
"base": "USD",
"date": "2026-09-20",
"rates": {
"XAU": 0.000485,
"XAG": 0.03825,
"XPT": 0.000915,
"XPD": 0.000748
},
"unit": "per troy ounce"
}
Use it to backfill charts and reconcile your daily snapshots. Apply the same ICP logic: do not attempt to request ICP from this endpoint; keep ICP as N/A for Metals-API and use your crypto provider for ICP history if applicable.
Time-Series: Purpose and Functionality
Purpose: Fetch a range of daily historical rates. This is helpful for batch backfills, analytics windows, and rolling computations like moving averages on supported symbols.
Time-Series: Example JSON Response
{
"success": true,
"timeseries": true,
"start_date": "2026-09-14",
"end_date": "2026-09-21",
"base": "USD",
"rates": {
"2026-09-14": {
"XAU": 0.000485,
"XAG": 0.03825,
"XPT": 0.000915
},
"2026-09-16": {
"XAU": 0.000483,
"XAG": 0.0382,
"XPT": 0.000913
},
"2026-09-21": {
"XAU": 0.000482,
"XAG": 0.03815,
"XPT": 0.000912
}
},
"unit": "per troy ounce"
}
Parse this structure into your timeseries store with the base currency and unit attached as metadata. Again, ICP remains N/A here for Metals-API.
Optional: Bid/Ask for Tighter Trading Integrations
If your application supports order routing, quotes, or hedging, you may care about bid/ask spreads for supported metals. The same “N/A for ICP” guidance applies.
Bid/Ask: Example JSON Response
{
"success": true,
"timestamp": 1789949761,
"base": "USD",
"date": "2026-09-21",
"rates": {
"XAU": {
"bid": 0.000481,
"ask": 0.000483,
"spread": 2.0e-6
},
"XAG": {
"bid": 0.0381,
"ask": 0.0382,
"spread": 0.0001
},
"XPT": {
"bid": 0.000911,
"ask": 0.000913,
"spread": 2.0e-6
}
},
"unit": "per troy ounce"
}
Only use bid/ask for symbols confirmed in the supported list. For ICP, return N/A in your Metals-API provider response.
A Minimal Aggregator Call Flow with Curl and JavaScript
Below is a realistic workflow snippet you can adapt. It treats ICP as unsupported in Metals-API, returning N/A for this provider while still fetching metals rates.
curl: Fetch Latest Rates for Supported Metals
curl -G https://metals-api.com/api/latest \
--data-urlencode "access_key=YOUR_API_KEY" \
--data-urlencode "base=USD" \
--data-urlencode "symbols=XAU,XAG"
JavaScript: Provider-Aware Aggregation (ICP marked N/A for Metals-API)
/**
* Example: provider-aware aggregation for a set of symbols where
* - Metals-API serves metals only (e.g., XAU, XAG)
* - ICP is not supported by Metals-API, so we return N/A for this provider
* and you can route ICP to a crypto provider elsewhere in your system.
*/
async function fetchMetalsApiLatest(symbols = ["XAU", "XAG", "ICP"]) {
const supportedByMetalsApi = new Set(["XAU", "XAG", "XPT", "XPD", "XCU", "XAL", "XNI", "XZN"]);
const metalsSymbols = symbols.filter(s => supportedByMetalsApi.has(s));
const unsupportedSymbols = symbols.filter(s => !supportedByMetalsApi.has(s));
const results = [];
if (metalsSymbols.length > 0) {
const params = new URLSearchParams({
access_key: process.env.METALS_API_KEY,
base: "USD",
symbols: metalsSymbols.join(",")
});
const url = `https://metals-api.com/api/latest?${params.toString()}`;
const res = await fetch(url);
const json = await res.json();
// Normalize each supported symbol to a standard shape
if (json && json.success && json.rates) {
for (const s of metalsSymbols) {
if (s in json.rates) {
results.push({
provider: "metals-api",
symbol: s,
base: json.base,
price: json.rates[s],
unit: json.unit, // e.g., "per troy ounce"
timestamp: json.timestamp,
data_status: "OK"
});
} else {
results.push({
provider: "metals-api",
symbol: s,
base: json.base || "USD",
price: null,
unit: json.unit || null,
timestamp: json.timestamp || null,
data_status: "MISSING_SYMBOL_IN_RESPONSE"
});
}
}
} else {
// Handle general API error
for (const s of metalsSymbols) {
results.push({
provider: "metals-api",
symbol: s,
base: "USD",
price: null,
unit: null,
timestamp: null,
data_status: "ERROR"
});
}
}
}
// Mark unsupported symbols (e.g., "ICP") as N/A for Metals-API
for (const s of unsupportedSymbols) {
results.push({
provider: "metals-api",
symbol: s,
base: "USD",
price: null,
unit: null,
timestamp: null,
data_status: "UNSUPPORTED_BY_PROVIDER"
});
}
return results;
}
Explanation of fields you will actually use:
- provider: identifies the source (metals-api) for audit and routing.
- symbol: the asset identifier.
- base: confirms the currency (USD) for downstream normalization.
- price: numeric rate (null for unsupported or errors).
- unit: especially important for metals (per troy ounce).
- timestamp: for freshness checks and caching controls.
- data_status: explicit state machine—OK, UNSUPPORTED_BY_PROVIDER, ERROR, etc.—so consumers can react deterministically.
Units, Base Currency, and Display: Small Details, Big Impact
Beginners often trip on unit and base currency mismatches. Metals-API returns rates relative to a base (USD by default) and uses troy ounces for metals units. If your UI displays grams or kilograms, standardize at ingestion time:
- 1 troy ounce = 31.1034768 grams. Store this conversion constant centrally.
- Always record the source unit in metadata, and convert explicitly for display or calculations.
For currencies, if your product quotes in EUR, convert final outputs after ingestion or by changing base (depending on your plan). Keep one canonical base for all providers internally to avoid rounding drift and reconciliation complexity.
Time and Market Nuances: Timestamps, Weekends, and Closures
Important handling rules:
- Timestamps: Use the provided timestamp fields for cache keys and staleness metrics. Align your logs and monitoring dashboards to this timestamp.
- Weekends and closures: Metals markets can have lower liquidity or be closed during certain periods. Implement fallback logic:
- For latest, if timestamp is older than your freshness SLA, surface a stale flag in the response.
- For historical/time-series, backfill emerges from daily rolls—be aware of missing days and handle them gracefully in charts.
Caching, Rate Management, and Cost Control
Even if you serve “N/A” for ICP from Metals-API, caching is still critical for the symbols you do support there:
- Cache by endpoint + base + symbol set + rounded timestamp window (e.g., minute-level if your plan updates every 10–60 minutes).
- Serve cache hits to UI endpoints to reduce latency and API consumption.
- Apply stale-while-revalidate to keep UIs responsive during refreshes.
Use distributed caching (Redis/Memcached) for multi-instance services. Tag cache entries with the timestamp reported by the API to avoid double-counting time drifts.
Security Best Practices
- Keep your Metals-API key server-side only; never expose it to clients.
- Rotate keys periodically and after any suspected leak.
- Rate-limit your public endpoints to prevent abuse cascading into your data providers.
- Validate and sanitize all user inputs, including symbol lists, to prevent injection or excessive query complexity.
Error Handling and Recovery Strategies
- Provider errors: Classify by transport (network), auth (key invalid), and data (malformed response). Backoff and retry with jitter for transient errors.
- Partial failures: If you request multiple symbols and some fail, return partial results with explicit data_status per symbol.
- N/A semantics: For unsupported symbols like ICP in Metals-API, respond deterministically with UNSUPPORTED_BY_PROVIDER and route to a crypto provider for ICP if your product requires it.
Data Validation and Sanitization
- Symbols: Only allow a whitelist or verify against the Metals-API Supported Symbols page before issuing requests.
- Numbers: Enforce finite numeric checks and reasonable value ranges. Reject or quarantine outliers.
- Dates: Validate ISO formats and restrict historical/time-series queries to permitted windows.
Performance Considerations for a Mixed-Asset Aggregator
- Batching: Group symbol requests by provider to minimize round trips.
- Parallelism: Fetch from multiple providers concurrently but cap concurrency to avoid resource starvation.
- Serialization: Keep response payloads compact; omit nulls if your consumers agree.
- Observability: Emit metrics for latency, success rate, cache hit ratio, and symbol-level error rates.
Practical Display Rules for “ICP - N/A”
- Display a neutral “N/A” badge or a tooltip explaining that ICP is not provided by this data source.
- If your app supports crypto, show a “switched provider” note when data comes from your crypto source.
- Persist an audit field indicating the data origin for each symbol.
Smart Technology Integration and Future-Proofing
As digital transformation accelerates across commodities and asset classes, the smartest aggregators:
- Separate symbol validation from data acquisition, enabling clean routing (metals vs. crypto vs. FX).
- Use policy-driven data contracts that define status codes (OK, STALE, N/A, ERROR) and provenance.
- Invest in data lineage so every plotted point and every quote is traceable back to a timestamp, provider, and unit.
If you plan to add rare-earth elements like neodymium (ND) in the future, apply the same pattern: first check the supported symbols list and verify units, then integrate with a suitable provider if the symbol isn’t currently covered. This approach allows you to incorporate new markets and data innovations without refactoring your entire stack.
Reference Links for Implementation
- Metals-API Website — Get a free API key and explore plans.
- Metals-API Documentation — Endpoint specs, parameters, and examples.
- Metals-API Supported Symbols — Confirm what symbols you can query.
- ISO 4217 currency codes — Keep your base/quote currency codes standardized.
Implementation Checklist
- Create your API key at the Metals-API Website.
- Implement a symbol registry and validation layer (Metals-API for metals; crypto provider for ICP).
- Normalize all outputs: base currency, unit, timestamp, provider, data_status.
- Layer caching with precise TTLs and stale-while-revalidate.
- Instrument metrics and logs with provider, symbol, and timestamp tags.
- Document your “N/A” semantics so UI and analytics teams know how to interpret ICP in Metals-API contexts.
Call to Action
Ready to build a robust, provider-aware backend that handles “ICP - N/A” correctly while delivering accurate metals prices? Get your free API key at the Metals-API Website and start integrating today. For full parameters and examples, see the Metals-API Documentation, and always confirm availability on the Metals-API Supported Symbols page.
FAQ
Does Metals-API support Internet Computer (ICP) pricing?
No. Metals-API focuses on precious and industrial metals and currency rates. ICP is a cryptocurrency and is not supported; therefore it should be treated as N/A for this provider.
How should I display ICP if my app uses Metals-API for metals?
Mark ICP as N/A when the data source is Metals-API. If your product requires ICP pricing, route to a crypto provider, normalize to your base currency, and merge the result into your unified schema.
What’s the base currency and unit returned by Metals-API?
By default, base is USD, and for metals, units are typically per troy ounce. Always record base and unit to avoid downstream confusion, especially during conversions.
Can I backfill charts with Metals-API?
Yes, for supported metals. Use the historical or time-series endpoints to populate past days. Respect timestamps and handle non-trading days gracefully. ICP remains N/A in Metals-API.
How often should I cache Metals-API responses?
Match your caching TTL to your plan’s update frequency (e.g., 10–60 minutes). Implement stale-while-revalidate for responsive UIs and efficient backend loads.
Where can I find the complete list of supported symbols?
Check the official list here: Metals-API Supported Symbols. Validate symbols against this list before requesting data.
How do I get started?
Visit the Metals-API Website, sign up to get your API key, and read the Metals-API Documentation for endpoint details. Then implement a symbol-aware aggregator that handles ICP as N/A for Metals-API and routes ICP to a crypto provider if needed.