CoinMarketCal

CoinMarketCal provides a crypto events calendar API that aggregates verified market-moving events for cryptocurrencies. The platform offers free and paid plans, detailed event data, categories, and coin information, enabling developers to integrate real-time catalyst data into dashboards, trading bots, and research tools. It emphasizes accurate sourcing, impact scoring, and comprehensive coverage of upcoming crypto events.

CoinMarketCal is listed with 1 API on the APIs.io network. Tagged areas include Cryptocurrency, Event, Calendar, and Data.

The CoinMarketCal catalog on APIs.io includes 1 event-driven AsyncAPI specification, 1 JSON-LD context, and 1 Spectral governance ruleset.

CoinMarketCal’s developer surface includes changelog, authentication, documentation, getting-started guide, pricing, support, and 19 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

42.4/100 developing Agent 32/100 agent ready Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 API

Cryptocurrency Event Calendar Data

Kin Score

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

Composite quality — 42.4/100 · developing

Contract Quality 7.2 / 21

Developer Ergonomics 8.1 / 17

Access Clarity 5.4 / 17

Operational Transparency 7.0 / 11

Contract Governance 2.2 / 10

Discoverability 5.0 / 9

Regulatory Posture 3.7 / 15

Agent readiness — 32/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 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):

Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
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
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
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)

7 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 33.8 — up to +16.6 composite points
Access Clarity scores 31.6 — up to +13.7 composite points
Developer Ergonomics scores 47.6 — up to +10.5 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/coinmarketcal-com/apis.yml: open an issue on github.com/api-evangelist/coinmarketcal-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 →

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.

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

APIs 1

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

CoinMarketCal API

CoinMarketCal API as documented publicly: 9 operations. Contract generated from the documentation by API Evangelist (2026-11-04); not the provider's own document.

CoinMarketCal API pricing

Rate limits

Free monthly quota: 3,000 / mo
Free sustained rate: 1 req/sec
Free burst capacity: 5

All 15 limits →

Rate Limits 1

Documented rate limits and quota policies.

Coinmarketcal Com Rate Limits

15 limits

RATE LIMITS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Coinmarketcal Com Webhooks

ASYNCAPI

Semantic Vocabularies 1

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

Coinmarketcal Com Context

5 classes · 10 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

CoinMarketCal API Rules

45 rules · 43 errors 1 warnings 1 info

SPECTRAL

JSON Schema 5

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

GetV2CoinsResponse

2 properties

JSON SCHEMA

GetV2EventsIdResponse

6 properties

JSON SCHEMA

GetV2EventsResponse

2 properties

JSON SCHEMA

GetV2ExportsEventsCsvResponse

1 properties

JSON SCHEMA

GetV2ExportsEventsSnapshotResponse

1 properties

JSON SCHEMA

Security Posture 2

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

Coinmarketcal Com Authentication

1 scheme

SECURITY

Coinmarketcal Com Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 8

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

Webhooks

DataModel

Conventions

Lifecycle

Conformance

Scroll for all 8

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 4

Status, limits, changes, and where to get help

RateLimits

ChangeLog

Deprecation

Support

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Newsroom

Newsroom

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: coinmarketcal-com
name: CoinMarketCal
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  probe_state: unreadable
  source:
  - authentication
  - rate-limits
  - security
  generated: '2026-11-06'
  method: derived
image: https://coinmarketcal.com/opengraph-image
description: CoinMarketCal provides a crypto events calendar API that aggregates verified market-moving events for cryptocurrencies.
  The platform offers free and paid plans, detailed event data, categories, and coin information, enabling developers to integrate
  real-time catalyst data into dashboards, trading bots, and research tools. It emphasizes accurate sourcing, impact scoring,
  and comprehensive coverage of upcoming crypto events.
url: https://artifacts.apis.io/coinmarketcal-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-04 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-04'
modified: '2026-11-04'
tags:
- Cryptocurrency
- Event
- Calendar
- Data
tags_raw:
- Crypto
- Events
- API
- Calendar
- Data
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: RateLimits
  url: rate-limits/coinmarketcal-com-rate-limits.yml
- type: Spectral
  url: rules/coinmarketcal-com-rules.yml
- type: JSONLD
  url: json-ld/coinmarketcal-com-context.jsonld
- type: Vocabulary
  url: vocabulary/coinmarketcal-com-vocabulary.yml
- type: Webhooks
  url: asyncapi/coinmarketcal-com-webhooks.yml
- type: DataModel
  url: data-model/coinmarketcal-com-data-model.yml
- type: ChangeLog
  url: changelog/coinmarketcal-com-changelog.yml
- type: Conventions
  url: conventions/coinmarketcal-com-conventions.yml
- type: Authentication
  url: authentication/coinmarketcal-com-authentication.yml
- type: Deprecation
  url: lifecycle/coinmarketcal-com-lifecycle.yml
- type: Lifecycle
  url: lifecycle/coinmarketcal-com-lifecycle.yml
- type: Conformance
  url: conformance/coinmarketcal-com-conformance.yml
- type: LLMsTxt
  url: llms/coinmarketcal-com-llms.txt
- type: Hosts
  url: hosts/coinmarketcal-com-hosts.yml
- type: Vendors
  url: vendors/coinmarketcal-com-vendors.yml
- type: Newsroom
  url: https://coinmarketcal.com/news
- type: DeveloperPortal
  url: https://api.coinmarketcal.com</code
- type: DomainSecurity
  url: security/coinmarketcal-com-domain-security.yml
- type: Website
  url: https://coinmarketcal.com/
- type: Documentation
  url: https://coinmarketcal.com/developer/docs
- type: GettingStarted
  url: https://coinmarketcal.com/developer/signup
- type: Pricing
  url: https://coinmarketcal.com/developer
- type: TermsOfService
  url: https://coinmarketcal.com/terms-of-service
- type: PrivacyPolicy
  url: https://coinmarketcal.com/privacy-policy
- type: Support
  url: https://coinmarketcal.com/contact
apis:
- aid: coinmarketcal-com:coinmarketcal-com-api
  name: CoinMarketCal API
  description: 'CoinMarketCal API as documented publicly: 9 operations. Contract generated from the documentation by API Evangelist
    (2026-11-04); not the provider''s own document.'
  humanURL: https://coinmarketcal.com/developer
  baseURL: https://api.coinmarketcal.com
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/coinmarketcal-com-openapi-generated.yml
    x-provenance: generated
  - type: JSONSchema
    url: json-schema/coinmarketcal-com-get-v2-events-response-schema.json
  - type: JSONSchema
    url: json-schema/coinmarketcal-com-get-v2-events-id-response-schema.json
  - type: JSONSchema
    url: json-schema/coinmarketcal-com-get-v2-coins-response-schema.json
  - type: JSONSchema
    url: json-schema/coinmarketcal-com-get-v2-exports-events-csv-response-schema.json
  - type: JSONSchema
    url: json-schema/coinmarketcal-com-get-v2-exports-events-snapshot-response-schema.json
x-coverage:
  state: unreadable
  reason: js-rendered-docs
  detail: Documentation pages are HTML rendered with JavaScript and provide no machine‑readable OpenAPI, GraphQL or other
    contract.
  evidence:
  - url: https://coinmarketcal.com/developer/docs
    status: 200
  checked: '2026-11-04'
x-enrichment:
  date: '2026-11-04'
  status: enriched
  artifacts_added: 28
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

CoinMarketCal API — frequently asked questions

Does CoinMarketCal have an API?

Yes. APIs.io lists 1 API from CoinMarketCal, including CoinMarketCal API.

Is there an OpenAPI specification for the CoinMarketCal API?

Yes. APIs.io indexes 1 OpenAPI specification for CoinMarketCal, each linked for download from this page.

How do I authenticate with the CoinMarketCal API?

CoinMarketCal uses bearer-token authentication (1 scheme). The details are profiled on APIs.io as Coinmarketcal Com Authentication.

Is the CoinMarketCal API ready for AI agents?

CoinMarketCal has a Kin Score of 42.4 out of 100 (developing) and an Agent Readiness score of 31.9 (agent-ready), scored by API Evangelist on 2026-11-06.

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