Metadapi

Metadapi provides reliable reference data APIs for applications, offering datasets such as zip code statistics, languages, continents, and countries. Their platform emphasizes fast, secure, and easy integration of standard JSON reference data, supporting developers with comprehensive documentation, change logs, and support resources.

Metadapi publishes 1 API contract indexed on the APIs.io network: Zipc API. Tagged areas include Company, Data, Reference, and JSON.

The Metadapi catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Metadapi’s developer surface includes support, authentication, documentation, API reference, getting-started guide, engineering blog, and 13 more developer resources.

🌐 Visit website📡 Profile data on GitHub
39.5/100 developing Agent 32/100 agent ready Full breakdown ↓
scored 2026-10-23 · rubric v0.25.0 · Show this score on your site →
1 published contract
CompanyDataReferenceJSON

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-10-23 · rubric v0.25.0
Composite quality — 39.5/100 · developing
Contract Quality 14.0 / 21
Developer Ergonomics 8.1 / 17
Access Clarity 3.6 / 17
Operational Transparency 0.6 / 11
Contract Governance 2.2 / 10
Discoverability 3.8 / 9
Regulatory Posture 3.7 / 15
Agent readiness — 32/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
Documented Reversibility 0 / 6
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 7 / 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
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/.
Show this score on your site. Kin Score badge preview for Metadapi It updates itself when the score changes. Paste this where you link to your API docs: 
<a href="https://apis.io/providers/metadapi/"><img src="https://apis.io/badge/metadapi/card.svg" alt="Metadapi on APIs.io — Kin Score by API Evangelist"></a>
Other styles, a README pill and a shields.io endpoint are on the badge page.
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/metadapi: 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 →

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.

JSON
tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

APIs 1

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

Metadapi Zipc API

The Zipc API from Metadapi — 7 operation(s) for zipc.

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Metadapi Context

4 classes · 45 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Metadapi API Rules

17 rules · 15 errors 1 warnings 1 info

SPECTRAL

JSON Schema 3

Standalone JSON Schema definitions for this provider's data models.

links

5 properties

JSON SCHEMA

ZipCodeResponse

3 properties

JSON SCHEMA

Zip Code

36 properties

JSON SCHEMA

Security Posture 2

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

Metadapi Authentication

apiKey · 1 scheme

SECURITY

Metadapi Domain Security

TLSv1.3

SECURITY

Agentic Access 1

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

Metadapi Agentic Access

7 operations

7 operations · 0 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted
GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral
Spectral
 JSONLD
JSONLD
 Vocabulary
Vocabulary
 DataModel
DataModel
 ErrorCatalog
ErrorCatalog
 Conformance
Conformance

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

Authentication
Authentication
 DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support
Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Other 1

Properties that don't map to a standard resource type

Hosts
Hosts

Source (apis.yml)

apis.yml Raw ↑ 
aid: metadapi
name: Metadapi
description: Metadapi provides reliable reference data APIs for applications, offering datasets such as zip code statistics,
  languages, continents, and countries. Their platform emphasizes fast, secure, and easy integration of standard JSON reference
  data, supporting developers with comprehensive documentation, change logs, and support resources.
url: https://raw.githubusercontent.com/api-evangelist/metadapi/refs/heads/main/apis.yml
x-type: company
x-source: harvest:g2-catalog
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-20 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-20'
modified: '2026-10-20'
tags:
- Company
- Data
- Reference
- JSON
tags_raw:
- Company
- Data
- Reference
- API
- JSON
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/metadapi-agentic-access.yml
- type: Spectral
  url: rules/metadapi-rules.yml
- type: JSONLD
  url: json-ld/metadapi-context.jsonld
- type: Vocabulary
  url: vocabulary/metadapi-vocabulary.yml
- type: DataModel
  url: data-model/metadapi-data-model.yml
- type: ErrorCatalog
  url: errors/metadapi-problem-types.yml
- type: Conformance
  url: conformance/metadapi-conformance.yml
- type: Hosts
  url: hosts/metadapi-hosts.yml
- type: Support
  url: https://www.metadapi.com/Support
- type: GitHubOrganization
  url: https://github.com/Metadapi/
- type: Authentication
  url: authentication/metadapi-authentication.yml
- type: DomainSecurity
  url: security/metadapi-domain-security.yml
- type: Website
  url: https://metadapi.com/
- type: Documentation
  url: https://www.metadapi.com/Support/Documentation
- type: APIReference
  url: https://metadapi.stoplight.io/docs/api/fd43i6ofj720n-zip-code-data-api-v2
- type: GettingStarted
  url: https://www.metadapi.com/Blog/getting-started-zip-code-api
- type: Blog
  url: https://www.metadapi.com/Blog
- type: TermsOfService
  url: https://www.metadapi.com/Terms
- type: PrivacyPolicy
  url: https://www.metadapi.com/Privacy
apis:
- aid: metadapi:metadapi-zipc-api
  name: Metadapi Zipc API
  description: The Zipc API from Metadapi — 7 operation(s) for zipc.
  humanURL: https://www.metadapi.com/API-Directory/Zip-Code-API
  tags:
  - Zipc
  properties:
  - type: OpenAPI
    url: openapi/metadapi-zipc-api-openapi.yml
  - type: JSONSchema
    url: json-schema/metadapi-zipcode-schema.json
  - type: JSONSchema
    url: json-schema/metadapi-links-schema.json
  - type: JSONSchema
    url: json-schema/metadapi-zip-code-response-schema.json
x-enrichment:
  date: '2026-10-20'
  status: enriched
  artifacts_added: 17
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

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