goldprice.dev vs Polygon.io / Massive.com

At a glance

Feature-level comparison against Massive's published plans. Current as of 2026-04-24.

Source: massive.com public pricing + goldprice.dev tiers.json. Current as of 2026-04-24.

Pricing, tier by tier

Single side-by-side view. All figures current as of 2026-04-24.

Metals coverage matrix

Metal by contract type, per provider.

Analytics differentiators

Endpoints goldprice.dev exposes that Massive does not offer at any tier.

Forward view

Futures settlement curve at user-selected expiry dates — gold on every plan including Free, silver and copper on Pro. Gives a structured price expectation grounded in exchange-traded data rather than a single spot quote.

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 basis widening.

Per-country physical dealer prices

Live dealer sell and buyback quotes with premium-over-spot across 12 countries, on Physical and above: the real price of gold at the counter, not a forex-pair quote.

Per-source license disclosure

Add ?include=sources to any price response for a sources[] array naming each upstream feed (live spot oracle, continuous spot reference, futures settlement, ECB reference rates, tokenized gold) with its license terms and source timestamp. Downstream consumers can route attribution or filter sources per their own redistribution rights.

MCP (Model Context Protocol)

Native stdio bridge with eight tools exposing price queries, forward-view fetches, methodology lookups, and source metadata. Available on Free, Physical, 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 Polygon.io / Massive.com for commodity data?

Yes, for gold, silver, and copper. goldprice.dev is a commodity-specialist API with per-metal spot quotes, futures settlement, a forward view (futures settlement curve), and cross-source divergence flags. Polygon.io / Massive.com is a generalist market-data API covering stocks, options, forex, crypto, indices, and futures — gold and silver are served as the XAU/USD and XAG/USD forex pairs. Pick Massive if gold is one of many assets in a multi-asset product. Pick goldprice.dev if metals are your primary use case and you need forward-view analytics plus per-source license disclosure.

Did Polygon.io rebrand to Massive.com?

Yes, on 2025-10-30. Both polygon.io and massive.com resolve to the same API, SDKs, and API keys. We route this comparison under /comparison/polygon-io because the long-tail query volume still sits on the old name. Content references Massive throughout so the page remains accurate after Google query volume flips.

How much does each API cost at the entry paid tier?

goldprice.dev Physical is $10/month; Massive entry is $49/month. goldprice.dev also ships a $0 Free tier (1,000 calls/month) and a $30 Pro tier (100,000 calls/month). Massive lists a single $49 entry tier with unlimited streaming and API requests, current as of 2026-04-24. For gold-only use cases at low volume, goldprice.dev is cheaper. For unlimited-volume multi-asset use cases, Massive's single-tier model is simpler.

Does Polygon.io / Massive.com cover futures-settlement gold futures settlement?

Yes, Massive covers futures including GC (gold), SI (silver), and HG (copper) on its futures plan. goldprice.dev also covers gold, silver, and copper futures settlement. The difference is downstream: goldprice.dev attaches per-source license disclosure, a forward view (futures settlement curve), and a cross-source divergence flag between live spot oracle and settlement. Massive returns settlement prices without per-source attribution or forward-view overlay.

Which API has MCP (Model Context Protocol) support?

goldprice.dev ships a native MCP server on every plan, including Free. Polygon.io / Massive.com has no MCP offering as of 2026-04-24. If you are wiring gold data into Claude, Cursor, or a custom agent, goldprice.dev exposes eight MCP tools over stdio instead of requiring REST-wrapper code.

Which API exposes a forward view and cross-source divergence for gold?

goldprice.dev does; Massive does not. goldprice.dev emits a forward-view endpoint covering the futures settlement curve, and a cross-source divergence flag between live spot oracle and futures settlement. Massive does not offer a forward view or cross-source divergence; gold is quoted as a single XAU/USD forex price.

Which API should I pick for multi-asset coverage beyond metals?

Polygon.io / Massive.com. If gold is one asset of many — alongside stocks, options, forex, crypto, indices, and non-metal futures — Massive's generalist coverage in one API fits. goldprice.dev only covers gold, silver, and copper. Outside metals, goldprice.dev is not the right API.

How is licensing disclosed in each API's responses?

goldprice.dev returns a sources[] array (via ?include=sources) with per-source license terms named inline (live spot oracle, continuous spot reference, futures settlement reference, tokenized gold). Polygon.io / Massive.com licenses its feed uniformly under Massive's commercial terms and does not attach per-source license disclosure to individual responses. If downstream redistribution or compliance requires per-source attribution, goldprice.dev exposes that data by default.

Does Polygon.io / Massive.com offer per-country dealer prices?

No. Massive prices gold and silver as the XAU/USD and XAG/USD forex pairs, with no dealer-level data. goldprice.dev Physical ($10+) covers live dealer sell and buyback quotes with premium-over-spot across 12 countries. Massive has no per-country dealer feed.

Who should pick which

Short version: pick Massive for multi-asset coverage at a single price point. Pick goldprice.dev for gold-native depth: per-country dealer prices, forward view, cross-source divergence, and per-source transparency.