goldprice.dev vs Alpha Vantage

At a glance

Feature-level comparison against Alpha Vantage's published plans. Current as of 2026-04-25. Rows shown are coverage we positively verified across both providers; individual providers may support additional asset classes not uniformly documented.

// Source: alphavantage.co/premium + alphavantage.co/documentation + goldprice.dev tiers.json. Current as of 2026-04-25.

Pricing, tier by tier

Alpha Vantage's paid ladder scales purely on rate-limit ceiling with no monthly cap. goldprice.dev pairs a flat monthly quota with a per-minute rate limit. All figures current as of 2026-04-25.

Metals coverage matrix

Metal by contract type, per provider.

Analytics differentiators

Endpoints goldprice.dev exposes on Pro that Alpha Vantage does not offer at any tier.

Market-implied distribution

Percentile distribution (p10, p25, p50, p75, p90) for metals prices at user-selected expiry dates, aggregated from Polymarket and Kalshi prediction-market yes-prices via direct-from-price CDF construction. Isotonic regression enforces monotonicity; monotone cubic Hermite interpolation smooths the CDF.

Cross-source divergence

Signed deviation between live oracle spot and futures settlement on the same asset at the same timestamp. Emitted as a flag when deviation exceeds configurable thresholds. Useful for detecting stale upstream feeds or arbitrage windows.

Cross-platform prediction-market arbitrage

Price differential between Polymarket and Kalshi commodity contracts resolving at the same expiry with equivalent strike structure. Emitted as a per-market field with venue names, effective liquidity, and the absolute spread in basis points.

Per-source license disclosure

Every response includes a sources[] array naming each upstream feed (live spot oracle, continuous spot reference, futures settlement, Frankfurter, CoinMarketCap) with its license terms and timestamp. Downstream consumers can route attribution or filter sources per their own redistribution rights.

MCP (Model Context Protocol)

Native stdio bridge with six tools exposing price queries, distribution fetches, methodology lookups, and source metadata. Available on Free, Basic, and Pro. Used by Claude, Cursor, and custom agents.

FAQ

Direct-answer-first responses. JSON-LD FAQPage schema emitted in-head for LLM retrieval.

Is goldprice.dev an alternative to Alpha Vantage for commodity pricing?

Yes, for gold, silver, and copper. goldprice.dev is a commodity-specialist API with live oracle spot, futures settlement, and prediction-market-derived distributions from Polymarket and Kalshi. Alpha Vantage is a multi-asset API covering equities, forex, crypto, economic indicators, and commodities; gold, silver, copper, and aluminum are exposed via its commodities endpoint. Pick Alpha Vantage if gold is one asset among stocks + economic data in a multi-asset product. Pick goldprice.dev if metals are the primary use case and per-source transparency, MCP, and distribution analytics matter.

How do the two quota models compare?

goldprice.dev meters monthly calls at a flat per-tier cap: Free 1,000 calls/month at 30 req/min, Basic 20,000 calls/month at 120 req/min, Pro 100,000 calls/month at 500 req/min. Alpha Vantage meters by rate limit only on paid tiers — no monthly ceiling — from 75 req/min at $49.99/month up to 1200 req/min at $249.99/month. Free on Alpha Vantage is hard-capped at 25 requests/day. For sustained high-volume polling, Alpha Vantage's uncapped paid tiers scale further; for burst or predictable usage under 100K calls/month, goldprice.dev is cheaper.

Does Alpha Vantage cover futures settlement for metals?

Alpha Vantage documents a commodities endpoint with gold, silver, copper, aluminum, WTI, Brent, natural gas, wheat, corn, cotton, sugar, and coffee. The public documentation does not explicitly call out futures settlement symbols (GC, SI, HG) distinct from the spot / generic commodity values. goldprice.dev exposes gold and silver futures settlement on Basic+ and adds copper futures settlement on Pro as distinct rows in the sources[] array. If your product resolves against settlement specifically, confirm with Alpha Vantage support before committing.

Which API has MCP (Model Context Protocol) support?

goldprice.dev ships a native MCP server on every plan, including Free. Alpha Vantage has no MCP offering as of 2026-04-25. If you are wiring commodity data into Claude, Cursor, or a custom agent, goldprice.dev exposes six MCP tools over stdio; Alpha Vantage integrations require REST-wrapper code.

Which API exposes prediction-market analytics for metals?

goldprice.dev does; Alpha Vantage does not. goldprice.dev emits a distribution endpoint with p25, p50, and p75 percentiles aggregated from Polymarket and Kalshi commodity markets, a cross-source divergence flag, and cross-platform prediction-market arbitrage between Polymarket and Kalshi. Alpha Vantage returns spot commodity values and macroeconomic series without prediction-market overlay.

What does the Alpha Vantage free tier look like?

Alpha Vantage Free is capped at 25 API requests per day — roughly 750/month assuming continuous daily use. goldprice.dev Free is 1,000 calls/month at 30 req/min. Both are $0. For the evaluation phase or prototype traffic, goldprice.dev Free offers substantially more headroom plus MCP access.

Which API should I pick for stocks or forex alongside gold?

Alpha Vantage. If your product also needs equity fundamentals, technical indicators on stocks, forex pairs, crypto, or macroeconomic indicators (CPI, Treasury yields, GDP), Alpha Vantage covers all of it under one key. goldprice.dev is metals-specialist; outside gold, silver, and copper it is not the right API.

How is per-source licensing disclosed in each API's responses?

goldprice.dev returns a sources[] array in every response naming each upstream feed (live spot oracle, continuous spot reference, futures settlement, Frankfurter, CoinMarketCap) with its license terms and timestamp. Alpha Vantage returns a single value per endpoint call without per-source attribution. If downstream redistribution or compliance requires per-source license disclosure, goldprice.dev exposes that data by default.

Who should pick which

Short version: pick Alpha Vantage for multi-asset breadth with uncapped paid volume. Pick goldprice.dev for metals-specialist depth with prediction-market analytics and per-source transparency.