Metals-API

Metals-API provides a free, simple, and lightweight JSON API for current and historical precious metals rates and currency conversion. It supports real-time and historical data for gold, silver, platinum, palladium, and other metals in 170 world currencies.

Metals-API publishes 4 APIs on the APIs.io network, including Analytics API, Conversion API, Rates API, and 1 more. Tagged areas include Currency, Financial Data, Gold, Precious Metals, and Silver.

Metals-API’s developer surface includes authentication, developer portal, pricing, signup flow, and 4 more developer resources.

🌐 Visit website 📡 Source on GitHub

35.3/100 thin ▬ flat Agent 23/100 agent aware Front door AI 3/6 light saas Full breakdown ↓
scored 2026-10-04 · rubric v0.23.0

AccessFreemiumSelf serve⚡ Free to try

1 published contract

Currency Financial Data Gold Precious Metals Silver

Kin Score

Kin Score How this is scored →
scored 2026-10-04 · rubric v0.23.0

Composite quality — 35.3/100 · thin

Contract Quality 10.0 / 21

Developer Ergonomics 7.3 / 17

Access Clarity 6.7 / 17

Operational Transparency 0.9 / 11

Contract Governance 0.0 / 10

Discoverability 5.6 / 9

Regulatory Posture 1.8 / 15

Agent readiness — 23/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 4 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/metals-api: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 4

Individual APIs this provider publishes, each with its own machine-readable definition.

Metals-API Analytics API

Time series, fluctuation, and OHLC analytics.

Metals-API Conversion API

Currency and metal conversion endpoints.

Metals-API Rates API

Real-time and historical precious metals rates.

Metals-API Reference API

Symbols and reference data.

Open Collections 6

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Metals Analytics API

OPEN COLLECTION

Metals Analytics Conversion API

OPEN COLLECTION

Metals Analytics Rates API

OPEN COLLECTION

Metals Analytics Reference API

OPEN COLLECTION

Metals-API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Metals Api Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Metals Api Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Metals Api Finops

FINOPS

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Metals Api Authentication

apiKey · 1 scheme

SECURITY

Metals Api Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Metals Api Agentic Access

9 operations

9 operations · 0 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

Portal

Portal

Signup

Signup

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Commercial 1

Pricing, plans, and the legal terms of use

Pricing

Pricing

Company 2

The organization behind the API

Website

Website

LinkedIn

Source (apis.yml)

aid: metals-api
name: Metals-API
description: Metals-API provides a free, simple, and lightweight JSON API for current and historical precious metals rates
  and currency conversion. It supports real-time and historical data for gold, silver, platinum, palladium, and other metals
  in 170 world currencies.
type: Index
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/metals-api.png
tags:
- Currency
- Financial Data
- Gold
- Precious Metals
- Silver
url: https://raw.githubusercontent.com/api-evangelist/metals-api/refs/heads/main/apis.yml
created: '2025-03-01'
modified: '2026-05-19'
specificationVersion: '0.23'
apis:
- aid: metals-api:metals-api-analytics-api
  name: Metals-API Analytics API
  description: Time series, fluctuation, and OHLC analytics.
  humanURL: https://metals-api.com/
  baseURL: https://metals-api.com/api
  tags:
  - Analytics
  properties:
  - type: OpenAPI
    url: openapi/metals-api-analytics-api-openapi.yml
  - type: Documentation
    url: https://metals-api.com/documentation
  - type: GettingStarted
    url: https://metals-api.com/documentation#access_key
- aid: metals-api:metals-api-conversion-api
  name: Metals-API Conversion API
  description: Currency and metal conversion endpoints.
  humanURL: https://metals-api.com/
  baseURL: https://metals-api.com/api
  tags:
  - Conversion
  properties:
  - type: OpenAPI
    url: openapi/metals-api-conversion-api-openapi.yml
  - type: Documentation
    url: https://metals-api.com/documentation
  - type: GettingStarted
    url: https://metals-api.com/documentation#access_key
- aid: metals-api:metals-api-rates-api
  name: Metals-API Rates API
  description: Real-time and historical precious metals rates.
  humanURL: https://metals-api.com/
  baseURL: https://metals-api.com/api
  tags:
  - Rates
  properties:
  - type: OpenAPI
    url: openapi/metals-api-rates-api-openapi.yml
  - type: Documentation
    url: https://metals-api.com/documentation
  - type: GettingStarted
    url: https://metals-api.com/documentation#access_key
- aid: metals-api:metals-api-reference-api
  name: Metals-API Reference API
  description: Symbols and reference data.
  humanURL: https://metals-api.com/
  baseURL: https://metals-api.com/api
  tags:
  - Reference
  properties:
  - type: OpenAPI
    url: openapi/metals-api-reference-api-openapi.yml
  - type: Documentation
    url: https://metals-api.com/documentation
  - type: GettingStarted
    url: https://metals-api.com/documentation#access_key
common:
- type: Website
  url: https://www.metals-api.com/
- type: AgenticAccess
  url: agentic-access/metals-api-agentic-access.yml
- type: DomainSecurity
  url: security/metals-api-domain-security.yml
- type: Authentication
  url: authentication/metals-api-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/zyla-labs
- type: Portal
  url: https://metals-api.com/
- type: Pricing
  url: https://metals-api.com/pricing
- type: Signup
  url: https://metals-api.com/signup
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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