80 Percent Silver

80 Percent Silver provides an online calculator for determining the melt value of silver and gold based on live spot prices. The site offers tools to calculate values for junk silver coins, bulk silver lots, and precious metal weights in various units, supporting both USD and CAD conversions. It also integrates data from external sources such as gold-api.com and frankfurter.dev for up-to-date pricing, and includes a privacy policy and affiliate links. The service aims to help collectors and investors quickly assess the monetary worth of their metal holdings.

80 Percent Silver is profiled on the APIs.io network. Tagged areas include Finance, Metals, Calculator, Investment, and Precious Metals.

80 Percent Silver’s developer surface includes API reference and 5 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

5.5/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

0 APIs

Finance Metals Calculator Investment Precious Metals

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 5.5/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 0.6 / 17

Access Clarity 0.9 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 4.1 / 9

Regulatory Posture 1.2 / 15

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 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 0 / 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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

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):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes

13 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 0.0 — up to +25.0 composite points
Developer Ergonomics scores 3.6 — up to +19.3 composite points
Access Clarity scores 5.3 — up to +18.9 composite points

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.

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/80percentsilver-com/apis.yml: open an issue on github.com/api-evangelist/80percentsilver-com 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 →

Security Posture 1

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

80Percentsilver Com Domain Security

TLSv1.3

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

APIReference

APIReference

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Commercial 1

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: 80percentsilver-com
name: 80 Percent Silver
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  probe_state: none
  source:
  - security
  generated: '2026-11-06'
  method: derived
image: https://80percentsilver.com/og-image.png
description: 80 Percent Silver provides an online calculator for determining the melt value of silver and gold based on live
  spot prices. The site offers tools to calculate values for junk silver coins, bulk silver lots, and precious metal weights
  in various units, supporting both USD and CAD conversions. It also integrates data from external sources such as gold-api.com
  and frankfurter.dev for up-to-date pricing, and includes a privacy policy and affiliate links. The service aims to help
  collectors and investors quickly assess the monetary worth of their metal holdings.
url: https://artifacts.apis.io/80percentsilver-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-31 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-31'
modified: '2026-10-31'
tags:
- Finance
- Metals
- Calculator
- Investment
- Precious Metals
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Hosts
  url: hosts/80percentsilver-com-hosts.yml
- type: Vendors
  url: vendors/80percentsilver-com-vendors.yml
- type: DomainSecurity
  url: security/80percentsilver-com-domain-security.yml
- type: Website
  url: https://80percentsilver.com/
- type: APIReference
  url: https://80percentsilver.com/api/spot
- type: PrivacyPolicy
  url: https://80percentsilver.com/privacy
apis: []
x-coverage:
  state: none
  reason: not-a-software-company
  detail: No API documentation or machine-readable contract was found; the listed API reference URL returns 404.
  evidence:
  - url: https://80percentsilver.com/api
    status: 404
  checked: '2026-10-31'
x-enrichment:
  date: '2026-10-31'
  status: enriched
  artifacts_added: 8
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

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