Metals.Dev

Metals.Dev provides a developer-friendly JSON API for spot prices of precious metals, industrial metals, and currency conversion rates. It offers real-time prices from leading authorities including LBMA, LME, MCX, and IBJA, plus 5+ years of historical data.

Metals.Dev publishes 5 API contracts indexed on the APIs.io network, including Account API, Authority API, Currency API, and 2 more. Tagged areas include Financial Data, Gold, Precious Metals, Silver, and Spot Prices.

The Metals.Dev catalog on APIs.io includes 1 Spectral governance ruleset.

Metals.Dev’s developer surface includes authentication, developer portal, pricing, signup flow, and 8 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

35.7/100 thin ▬ flat Agent 23/100 agent aware Front door AI 1/6 silent saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract

Financial Data Gold Precious Metals SilverSpot Prices

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 35.7/100 · thin

Contract Quality 10.0 / 21

Developer Ergonomics 7.3 / 17

Access Clarity 4.3 / 17

Operational Transparency 2.9 / 11

Contract Governance 1.4 / 10

Discoverability 5.6 / 9

Regulatory Posture 0.9 / 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

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link Ask about this →
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document Ask about this →
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented) Ask about this →

6 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Access Clarity scores 25.5 — up to +14.9 composite points Ask about this →
Contract Quality scores 47.1 — up to +13.2 composite points Ask about this →
Developer Ergonomics scores 42.9 — up to +11.4 composite points Ask about this →

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

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 the provider profile at artifacts.apis.io/metals-dev/apis.yml: open an issue on github.com/api-evangelist/metals-dev to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

APIs 5

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

Metals.Dev Account API

Usage and quota information.

Metals.Dev Authority API

Authority pricing from LBMA, LME, MCX, and IBJA.

Metals.Dev Currency API

Currency rates and conversions.

Metals.Dev Rates API

Latest and historical metal and currency rates.

Metals.Dev Spot Prices API

Spot pricing for individual metals.

Open Collections 6

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

Metals.Dev Account API

OPEN COLLECTION

Metals.Dev Account Authority API

OPEN COLLECTION

Metals.Dev Account Currency API

OPEN COLLECTION

Metals.Dev Account Rates API

OPEN COLLECTION

Metals.Dev Account Spot Prices API

OPEN COLLECTION

Metals.Dev API

OPEN COLLECTION

Metals.Dev API pricing

Not yet checked against Metals.Dev's own pricing page. Compiled by API Evangelist on 2026-05-04; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Free freemium	Free
Professional paid	Free
Enterprise enterprise	—

Plan details, limits and sources →

Rate limits

Free Tier Default: 10 requests per minute
Free Tier Monthly Quota: 1000 requests per month
Professional Tier Default: 100 requests per minute

Compiled by API Evangelist, not yet checked against Metals.Dev's documentation. All 5 limits →

Pricing Plans 1

Published pricing tiers and plan structures.

Metals.Dev Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Metals.Dev Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Metals.Dev Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

Metals.Dev API Rules

62 rules · 60 error-severity 1 warn-severity 1 info-severity

SPECTRAL

Security Posture 2

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

Metals.Dev Authentication

apiKey · 1 scheme

SECURITY

Metals.Dev Domain Security

TLSv1.3 · HSTS

SECURITY

Agentic Access (API Evangelist recommendations) 1

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

Metals.Dev Agentic Access

6 operations

6 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

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

RateLimits

RateLimits

StatusPage

StatusPage

Commercial 3

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Pricing

Pricing

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: metals-dev
name: Metals.Dev
description: Metals.Dev provides a developer-friendly JSON API for spot prices of precious metals, industrial metals, and
  currency conversion rates. It offers real-time prices from leading authorities including LBMA, LME, MCX, and IBJA, plus
  5+ years of historical data.
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
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/metals-dev.png
tags:
- Financial Data
- Gold
- Precious Metals
- Silver
- Spot Prices
url: https://raw.githubusercontent.com/api-evangelist/metals-dev/refs/heads/main/apis.yml
created: '2025-03-01'
modified: '2026-05-19'
specificationVersion: '0.23'
apis:
- aid: metals-dev:metals-dev-account-api
  name: Metals.Dev Account API
  description: Usage and quota information.
  humanURL: https://metals.dev/docs
  baseURL: https://api.metals.dev/v1
  tags:
  - Account
  properties:
  - type: OpenAPI
    url: openapi/metals-dev-account-api-openapi.yml
  - type: Documentation
    url: https://metals.dev/docs
  - type: GettingStarted
    url: https://metals.dev/docs#getting-started
- aid: metals-dev:metals-dev-authority-api
  name: Metals.Dev Authority API
  description: Authority pricing from LBMA, LME, MCX, and IBJA.
  humanURL: https://metals.dev/docs
  baseURL: https://api.metals.dev/v1
  tags:
  - Authority
  properties:
  - type: OpenAPI
    url: openapi/metals-dev-authority-api-openapi.yml
  - type: Documentation
    url: https://metals.dev/docs
  - type: GettingStarted
    url: https://metals.dev/docs#getting-started
- aid: metals-dev:metals-dev-currency-api
  name: Metals.Dev Currency API
  description: Currency rates and conversions.
  humanURL: https://metals.dev/docs
  baseURL: https://api.metals.dev/v1
  tags:
  - Currency
  properties:
  - type: OpenAPI
    url: openapi/metals-dev-currency-api-openapi.yml
  - type: Documentation
    url: https://metals.dev/docs
  - type: GettingStarted
    url: https://metals.dev/docs#getting-started
- aid: metals-dev:metals-dev-rates-api
  name: Metals.Dev Rates API
  description: Latest and historical metal and currency rates.
  humanURL: https://metals.dev/docs
  baseURL: https://api.metals.dev/v1
  tags:
  - Rates
  properties:
  - type: OpenAPI
    url: openapi/metals-dev-rates-api-openapi.yml
  - type: Documentation
    url: https://metals.dev/docs
  - type: GettingStarted
    url: https://metals.dev/docs#getting-started
- aid: metals-dev:metals-dev-spot-prices-api
  name: Metals.Dev Spot Prices API
  description: Spot pricing for individual metals.
  humanURL: https://metals.dev/docs
  baseURL: https://api.metals.dev/v1
  tags:
  - Spot Prices
  properties:
  - type: OpenAPI
    url: openapi/metals-dev-spot-prices-api-openapi.yml
  - type: Documentation
    url: https://metals.dev/docs
  - type: GettingStarted
    url: https://metals.dev/docs#getting-started
common:
- type: Plans
  url: plans/metals-dev-plans-pricing.yml
- type: RateLimits
  url: rate-limits/metals-dev-rate-limits.yml
- type: FinOps
  url: finops/metals-dev-finops.yml
- type: Website
  url: https://www.metals.dev/
- type: AgenticAccess
  url: agentic-access/metals-dev-agentic-access.yml
- type: DomainSecurity
  url: security/metals-dev-domain-security.yml
- type: Authentication
  url: authentication/metals-dev-authentication.yml
- type: GitHubOrganization
  url: https://github.com/MetalsDev
- type: Portal
  url: https://metals.dev/
- type: Pricing
  url: https://metals.dev/pricing
- type: StatusPage
  url: https://metals.dev/status
- type: Signup
  url: https://metals.dev/sign-up
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Metals.Dev API — frequently asked questions

Does Metals.Dev have an API?

Yes. APIs.io lists 5 APIs from Metals.Dev, including Metals.Dev Account API, Metals.Dev Authority API and Metals.Dev Currency API, and 2 more.

Is there an OpenAPI specification for the Metals.Dev API?

Yes. APIs.io indexes 5 OpenAPI specifications for Metals.Dev, each linked for download from this page.

How do I authenticate with the Metals.Dev API?

Metals.Dev uses bearer-token authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Metals.Dev Authentication.

How much does the Metals.Dev API cost?

APIs.io lists 3 pricing plans for Metals.Dev, with each plan's price, limits and inclusions under Pricing on this page.

Is the Metals.Dev API ready for AI agents?

Metals.Dev has a Kin Score of 35.7 out of 100 (thin) and an Agent Readiness score of 22.7 (agent-aware), scored by API Evangelist on 2026-11-13.

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