# Bullion API

**Canonical:** https://apis.io/providers/bullion-api/  
**Website:** https://bullionapi.dev  
**APIs profiled:** 7

Bullion API provides real-time gold spot prices and historical data for developers. It offers cached price observations in over 150 currencies, a simple REST endpoint, and a free tier with 30 monthly requests. The service targets apps needing indicative valuations, charts, and market data without requiring credit cards.

## Kin Score — 37.5 / 100 (thin)

Scored 2026-11-06 under rubric 0.27.0. Trend: falling (-8.4 from 45.9).

| Facet | Score |
|---|---|
| Discoverability | 78.6 |
| Contract Quality | 26.0 |
| Contract Governance | 35.6 |
| Operational Transparency | 18.4 |
| Developer Ergonomics | 11.9 |
| Access Clarity | 61.8 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 26.5 (matched via fallback).

## Agent readiness — 38.0 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | served |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | verified |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | served |
| Protected Resource Metadata | verified |
| Dynamic Client Registration | yes |
| Agentic Commerce | no |
| Pagination Ratio | na |
| Operation Distinctiveness | distinct |
| MCP Tool Quality | na |

## Access

Freemium — onboarding: unknown, pricing: freemium, trial: no (confidence: low).

## APIs (7)

- **Bullion API Bullion API API** — The Bullion API API API from Bullion API — 3 operation(s) for bullion api api.
- **Bullion API Central Bank Gold API** — The Central Bank Gold API from Bullion API — 1 operation(s) for central bank gold.
- **Bullion API Central Bank Reserves API** — The Central Bank Reserves API from Bullion API — 1 operation(s) for central bank reserves.
- **Bullion API Countries API** — The Countries API from Bullion API — 1 operation(s) for countries.
- **Bullion API Gold API** — The Gold API from Bullion API — 1 operation(s) for gold.
- **Bullion API Portfolio API** — The Portfolio API from Bullion API — 2 operation(s) for portfolio.
- **Bullion API Silver API** — The Silver API from Bullion API — 1 operation(s) for silver.

## Security (2)

- **Bullion Api Domain Security** — TLSv1.3 · DMARC
- **Bullion Api Vulnerability Disclosure** — security.txt · contact published

## Plans (2)

- **Bullion Api Plans Pricing**
- **Bullion Api Price Estimates**

## Tags

Company, Gold, Prices, Finance, Data

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/bullion-api/). Scores are computed from the provider's own public artifacts under a published rubric.